mesa xkeyboard-config git update 3 sep 2012

26 files changed, 0 insertions, 6726 deletions

diff --git a/mesalib/src/glu/sgi/libtess/README b/mesalib/src/glu/sgi/libtess/README
deleted file mode 100644
index 66a6011e2..000000000
--- a/mesalib/src/glu/sgi/libtess/README
+++ /dev/null
@@ -1,446 +0,0 @@
-/*
-*/
-
-General Polygon Tesselation
----------------------------
-
-  This note describes a tesselator for polygons consisting of one or
-  more closed contours.  It is backward-compatible with the current
-  OpenGL Utilities tesselator, and is intended to replace it.  Here is
-  a summary of the major differences:
-
-   - input contours can be intersecting, self-intersecting, or degenerate.
-  
-   - supports a choice of several winding rules for determining which parts
-     of the polygon are on the "interior".  This makes it possible to do
-     CSG operations on polygons.
-  
-   - boundary extraction: instead of tesselating the polygon, returns a
-     set of closed contours which separate the interior from the exterior.
-  
-   - returns the output as a small number of triangle fans and strips,
-     rather than a list of independent triangles (when possible).
-  
-   - output is available as an explicit mesh (a quad-edge structure),
-     in addition to the normal callback interface.
-  
-   - the algorithm used is extremely robust.
-
-
-The interface
--------------
-
-  The tesselator state is maintained in a "tesselator object".
-  These are allocated and destroyed using
-
-     GLUtesselator *gluNewTess( void );
-     void gluDeleteTess( GLUtesselator *tess );
-
-  Several tesselator objects may be used simultaneously.
-
-  Inputs
-  ------
-  
-  The input contours are specified with the following routines:
-
-     void gluTessBeginPolygon( GLUtesselator *tess );
-     void gluTessBeginContour( GLUtesselator *tess );
-     void gluTessVertex( GLUtesselator *tess, GLUcoord coords[3], void *data );
-     void gluTessEndContour( GLUtesselator *tess );
-     void gluTessEndPolygon( GLUtesselator *tess );
-
-  Within each BeginPolygon/EndPolygon pair, there can be zero or more
-  calls to BeginContour/EndContour.  Within each contour, there are zero
-  or more calls to gluTessVertex().  The vertices specify a closed
-  contour (the last vertex of each contour is automatically linked to
-  the first).
-
-  "coords" give the coordinates of the vertex in 3-space.  For useful
-  results, all vertices should lie in some plane, since the vertices
-  are projected onto a plane before tesselation.  "data" is a pointer
-  to a user-defined vertex structure, which typically contains other
-  information such as color, texture coordinates, normal, etc.  It is
-  used to refer to the vertex during rendering.
-
-  The library can be compiled in single- or double-precision; the type
-  GLUcoord represents either "float" or "double" accordingly.  The GLU
-  version will be available in double-precision only.  Compile with
-  GLU_TESS_API_FLOAT defined to get the single-precision version.
-
-  When EndPolygon is called, the tesselation algorithm determines
-  which regions are interior to the given contours, according to one
-  of several "winding rules" described below.  The interior regions
-  are then tesselated, and the output is provided as callbacks.
-
-
-  Rendering Callbacks
-  -------------------
-
-  Callbacks are specified by the client using
-
-     void gluTessCallback( GLUtesselator *tess, GLenum which, void (*fn)());
-
-  If "fn" is NULL, any previously defined callback is discarded.
-  
-  The callbacks used to provide output are:	/* which == */
-
-     void begin( GLenum type );			/* GLU_TESS_BEGIN */
-     void edgeFlag( GLboolean flag );		/* GLU_TESS_EDGE_FLAG */
-     void vertex( void *data );			/* GLU_TESS_VERTEX */
-     void end( void );				/* GLU_TESS_END */
-
-  Any of the callbacks may be left undefined; if so, the corresponding
-  information will not be supplied during rendering.
-
-  The "begin" callback indicates the start of a primitive; type is one
-  of GL_TRIANGLE_STRIP, GL_TRIANGLE_FAN, or GL_TRIANGLES (but see the
-  notes on "boundary extraction" below).
-  
-  It is followed by any number of "vertex" callbacks, which supply the
-  vertices in the same order as expected by the corresponding glBegin()
-  call.  After the last vertex of a given primitive, there is a callback
-  to "end".
-
-  If the "edgeFlag" callback is provided, no triangle fans or strips
-  will be used.  When edgeFlag is called, if "flag" is GL_TRUE then each
-  vertex which follows begins an edge which lies on the polygon boundary
-  (ie. an edge which separates an interior region from an exterior one).
-  If "flag" is GL_FALSE, each vertex which follows begins an edge which lies
-  in the polygon interior.  "edgeFlag" will be called before the first
-  call to "vertex".
-
-  Other Callbacks
-  ---------------
-
-   void mesh( GLUmesh *mesh );			/* GLU_TESS_MESH */
-
-   - Returns an explicit mesh, represented using the quad-edge structure
-     (Guibas/Stolfi '85).  Other implementations of this interface might
-     use a different mesh structure, so this is available only only as an
-     SGI extension.  When the mesh is no longer needed, it should be freed
-     using
-
-	void gluDeleteMesh( GLUmesh *mesh );
-
-     There is a brief description of this data structure in the include
-     file "mesh.h".  For the full details, see L. Guibas and J. Stolfi,
-     Primitives for the manipulation of general subdivisions and the
-     computation of Voronoi diagrams, ACM Transactions on Graphics,
-     4(2):74-123, April 1985.  For an introduction, see the course notes
-     for CS348a, "Mathematical Foundations of Computer Graphics",
-     available at the Stanford bookstore (and taught during the fall
-     quarter).
-
-   void error( GLenum errno );			/* GLU_TESS_ERROR */
-
-   - errno is one of	GLU_TESS_MISSING_BEGIN_POLYGON,
-			GLU_TESS_MISSING_END_POLYGON,
-			GLU_TESS_MISSING_BEGIN_CONTOUR,
-			GLU_TESS_MISSING_END_CONTOUR,
-			GLU_TESS_COORD_TOO_LARGE,
-			GLU_TESS_NEED_COMBINE_CALLBACK
-
-     The first four are obvious.  The interface recovers from these
-     errors by inserting the missing call(s).
-  
-     GLU_TESS_COORD_TOO_LARGE says that some vertex coordinate exceeded
-     the predefined constant GLU_TESS_MAX_COORD in absolute value, and
-     that the value has been clamped.  (Coordinate values must be small
-     enough so that two can be multiplied together without overflow.)
-
-     GLU_TESS_NEED_COMBINE_CALLBACK says that the algorithm detected an
-     intersection between two edges in the input data, and the "combine"
-     callback (below) was not provided.  No output will be generated.
-
-
-   void combine( GLUcoord coords[3], void *data[4],	/* GLU_TESS_COMBINE */
-		 GLUcoord weight[4], void **outData );
-
-   - When the algorithm detects an intersection, or wishes to merge
-     features, it needs to create a new vertex.  The vertex is defined
-     as a linear combination of up to 4 existing vertices, referenced
-     by data[0..3].  The coefficients of the linear combination are
-     given by weight[0..3]; these weights always sum to 1.0.  All vertex
-     pointers are valid even when some of the weights are zero.
-     "coords" gives the location of the new vertex.
-
-     The user must allocate another vertex, interpolate parameters
-     using "data" and "weights", and return the new vertex pointer in
-     "outData".  This handle is supplied during rendering callbacks.
-     For example, if the polygon lies in an arbitrary plane in 3-space,
-     and we associate a color with each vertex, the combine callback might
-     look like this:
-    
-     void myCombine( GLUcoord coords[3], VERTEX *d[4],
-                     GLUcoord w[4], VERTEX **dataOut )
-     {
-        VERTEX *new = new_vertex();
-       
-        new->x = coords[0];
-        new->y = coords[1];
-        new->z = coords[2];
-        new->r = w[0]*d[0]->r + w[1]*d[1]->r + w[2]*d[2]->r + w[3]*d[3]->r;
-        new->g = w[0]*d[0]->g + w[1]*d[1]->g + w[2]*d[2]->g + w[3]*d[3]->g;
-        new->b = w[0]*d[0]->b + w[1]*d[1]->b + w[2]*d[2]->b + w[3]*d[3]->b;
-        new->a = w[0]*d[0]->a + w[1]*d[1]->a + w[2]*d[2]->a + w[3]*d[3]->a;
-        *dataOut = new;
-     }
-
-     If the algorithm detects an intersection, then the "combine" callback
-     must be defined, and must write a non-NULL pointer into "dataOut".
-     Otherwise the GLU_TESS_NEED_COMBINE_CALLBACK error occurs, and no
-     output is generated.  This is the only error that can occur during
-     tesselation and rendering.
-
-
-  Control over Tesselation
-  ------------------------
-  
-   void gluTessProperty( GLUtesselator *tess, GLenum which, GLUcoord value );
-
-   Properties defined:
-
-    - GLU_TESS_WINDING_RULE.  Possible values:
-
-	  GLU_TESS_WINDING_ODD
-	  GLU_TESS_WINDING_NONZERO
-	  GLU_TESS_WINDING_POSITIVE
-	  GLU_TESS_WINDING_NEGATIVE
-	  GLU_TESS_WINDING_ABS_GEQ_TWO
-
-      The input contours parition the plane into regions.  A winding
-      rule determines which of these regions are inside the polygon.
-      
-      For a single contour C, the winding number of a point x is simply
-      the signed number of revolutions we make around x as we travel
-      once around C (where CCW is positive).  When there are several
-      contours, the individual winding numbers are summed.  This
-      procedure associates a signed integer value with each point x in
-      the plane.  Note that the winding number is the same for all
-      points in a single region.
-
-      The winding rule classifies a region as "inside" if its winding
-      number belongs to the chosen category (odd, nonzero, positive,
-      negative, or absolute value of at least two).  The current GLU
-      tesselator implements the "odd" rule.  The "nonzero" rule is another
-      common way to define the interior.  The other three rules are
-      useful for polygon CSG operations (see below).
-
-    - GLU_TESS_BOUNDARY_ONLY.  Values: TRUE (non-zero) or FALSE (zero).
-
-      If TRUE, returns a set of closed contours which separate the
-      polygon interior and exterior (rather than a tesselation).
-      Exterior contours are oriented CCW with respect to the normal,
-      interior contours are oriented CW.  The GLU_TESS_BEGIN callback
-      uses the type GL_LINE_LOOP for each contour.
-      
-    - GLU_TESS_TOLERANCE.  Value: a real number between 0.0 and 1.0.
-
-      This specifies a tolerance for merging features to reduce the size
-      of the output.  For example, two vertices which are very close to
-      each other might be replaced by a single vertex.  The tolerance
-      is multiplied by the largest coordinate magnitude of any input vertex;
-      this specifies the maximum distance that any feature can move as the
-      result of a single merge operation.  If a single feature takes part
-      in several merge operations, the total distance moved could be larger.
-
-      Feature merging is completely optional; the tolerance is only a hint.
-      The implementation is free to merge in some cases and not in others,
-      or to never merge features at all.  The default tolerance is zero.
-      
-      The current implementation merges vertices only if they are exactly
-      coincident, regardless of the current tolerance.  A vertex is
-      spliced into an edge only if the implementation is unable to
-      distinguish which side of the edge the vertex lies on.
-      Two edges are merged only when both endpoints are identical.
-
-
-   void gluTessNormal( GLUtesselator *tess,
-		      GLUcoord x, GLUcoord y, GLUcoord z )
-
-    - Lets the user supply the polygon normal, if known.  All input data
-      is projected into a plane perpendicular to the normal before
-      tesselation.  All output triangles are oriented CCW with
-      respect to the normal (CW orientation can be obtained by
-      reversing the sign of the supplied normal).  For example, if
-      you know that all polygons lie in the x-y plane, call
-      "gluTessNormal(tess, 0.0, 0.0, 1.0)" before rendering any polygons.
-      
-    - If the supplied normal is (0,0,0) (the default value), the
-      normal is determined as follows.  The direction of the normal,
-      up to its sign, is found by fitting a plane to the vertices,
-      without regard to how the vertices are connected.  It is
-      expected that the input data lies approximately in plane;
-      otherwise projection perpendicular to the computed normal may
-      substantially change the geometry.  The sign of the normal is
-      chosen so that the sum of the signed areas of all input contours
-      is non-negative (where a CCW contour has positive area).
-    
-    - The supplied normal persists until it is changed by another
-      call to gluTessNormal.
-
-
-  Backward compatibility with the GLU tesselator
-  ----------------------------------------------
-
-  The preferred interface is the one described above.  The following
-  routines are obsolete, and are provided only for backward compatibility:
-
-    typedef GLUtesselator GLUtriangulatorObj;	/* obsolete name */
-
-    void gluBeginPolygon( GLUtesselator *tess );
-    void gluNextContour( GLUtesselator *tess, GLenum type );
-    void gluEndPolygon( GLUtesselator *tess );
-  
-  "type" is one of GLU_EXTERIOR, GLU_INTERIOR, GLU_CCW, GLU_CW, or
-  GLU_UNKNOWN.  It is ignored by the current GLU tesselator.
-  
-  GLU_BEGIN, GLU_VERTEX, GLU_END, GLU_ERROR, and GLU_EDGE_FLAG are defined
-  as synonyms for GLU_TESS_BEGIN, GLU_TESS_VERTEX, GLU_TESS_END,
-  GLU_TESS_ERROR, and GLU_TESS_EDGE_FLAG.
-
-
-Polygon CSG operations
-----------------------
-
-  The features of the tesselator make it easy to find the union, difference,
-  or intersection of several polygons.
-
-  First, assume that each polygon is defined so that the winding number
-  is 0 for each exterior region, and 1 for each interior region.  Under
-  this model, CCW contours define the outer boundary of the polygon, and
-  CW contours define holes.  Contours may be nested, but a nested
-  contour must be oriented oppositely from the contour that contains it.
-
-  If the original polygons do not satisfy this description, they can be
-  converted to this form by first running the tesselator with the
-  GLU_TESS_BOUNDARY_ONLY property turned on.  This returns a list of
-  contours satisfying the restriction above.  By allocating two
-  tesselator objects, the callbacks from one tesselator can be fed
-  directly to the input of another.
-
-  Given two or more polygons of the form above, CSG operations can be
-  implemented as follows:
-
-  Union
-     Draw all the input contours as a single polygon.  The winding number
-     of each resulting region is the number of original polygons
-     which cover it.  The union can be extracted using the
-     GLU_TESS_WINDING_NONZERO or GLU_TESS_WINDING_POSITIVE winding rules.
-     Note that with the nonzero rule, we would get the same result if
-     all contour orientations were reversed.
-
-  Intersection (two polygons at a time only)
-     Draw a single polygon using the contours from both input polygons.
-     Extract the result using GLU_TESS_WINDING_ABS_GEQ_TWO.  (Since this
-     winding rule looks at the absolute value, reversing all contour
-     orientations does not change the result.)
-
-  Difference
-  
-     Suppose we want to compute A \ (B union C union D).  Draw a single
-     polygon consisting of the unmodified contours from A, followed by
-     the contours of B,C,D with the vertex order reversed (this changes
-     the winding number of the interior regions to -1).  To extract the
-     result, use the GLU_TESS_WINDING_POSITIVE rule.
-   
-     If B,C,D are the result of a GLU_TESS_BOUNDARY_ONLY call, an
-     alternative to reversing the vertex order is to reverse the sign of
-     the supplied normal.  For example in the x-y plane, call
-     gluTessNormal( tess, 0.0, 0.0, -1.0 ).
- 
-
-Performance
------------
-
-  The tesselator is not intended for immediate-mode rendering; when
-  possible the output should be cached in a user structure or display
-  list.  General polygon tesselation is an inherently difficult problem,
-  especially given the goal of extreme robustness.
-
-  The implementation makes an effort to output a small number of fans
-  and strips; this should improve the rendering performance when the
-  output is used in a display list.
-
-  Single-contour input polygons are first tested to see whether they can
-  be rendered as a triangle fan with respect to the first vertex (to
-  avoid running the full decomposition algorithm on convex polygons).
-  Non-convex polygons may be rendered by this "fast path" as well, if
-  the algorithm gets lucky in its choice of a starting vertex.
-
-  For best performance follow these guidelines:
-
-   - supply the polygon normal, if available, using gluTessNormal().
-     This represents about 10% of the computation time.  For example,
-     if all polygons lie in the x-y plane, use gluTessNormal(tess,0,0,1).
-
-   - render many polygons using the same tesselator object, rather than
-     allocating a new tesselator for each one.  (In a multi-threaded,
-     multi-processor environment you may get better performance using
-     several tesselators.)
-
-
-Comparison with the GLU tesselator
-----------------------------------
-
-  On polygons which make it through the "fast path", the tesselator is
-  3 to 5 times faster than the GLU tesselator.
-
-  On polygons which don't make it through the fast path (but which don't
-  have self-intersections or degeneracies), it is about 2 times slower.
-
-  On polygons with self-intersections or degeneraces, there is nothing
-  to compare against.
-
-  The new tesselator generates many more fans and strips, reducing the
-  number of vertices that need to be sent to the hardware.
-
-  Key to the statistics:
-
-	vert		number of input vertices on all contours
-	cntr		number of input contours
-	tri		number of triangles in all output primitives
-	strip		number of triangle strips
-	fan		number of triangle fans
-	ind		number of independent triangles
-	ms		number of milliseconds for tesselation
-			(on a 150MHz R4400 Indy)
-
-  Convex polygon examples:
-
-New:     3 vert,   1 cntr,     1 tri,   0 strip,   0 fan,     1 ind,  0.0459 ms
-Old:     3 vert,   1 cntr,     1 tri,   0 strip,   0 fan,     1 ind,   0.149 ms
-New:     4 vert,   1 cntr,     2 tri,   0 strip,   1 fan,     0 ind,  0.0459 ms
-Old:     4 vert,   1 cntr,     2 tri,   0 strip,   0 fan,     2 ind,   0.161 ms
-New:    36 vert,   1 cntr,    34 tri,   0 strip,   1 fan,     0 ind,   0.153 ms
-Old:    36 vert,   1 cntr,    34 tri,   0 strip,   0 fan,    34 ind,   0.621 ms
-
-  Concave single-contour polygons:
-
-New:     5 vert,   1 cntr,     3 tri,   0 strip,   1 fan,     0 ind,   0.052 ms
-Old:     5 vert,   1 cntr,     3 tri,   0 strip,   0 fan,     3 ind,   0.252 ms
-New:    19 vert,   1 cntr,    17 tri,   2 strip,   2 fan,     1 ind,   0.911 ms
-Old:    19 vert,   1 cntr,    17 tri,   0 strip,   0 fan,    17 ind,   0.529 ms
-New:   151 vert,   1 cntr,   149 tri,  13 strip,  18 fan,     3 ind,    6.82 ms
-Old:   151 vert,   1 cntr,   149 tri,   0 strip,   3 fan,   143 ind,     2.7 ms
-New:   574 vert,   1 cntr,   572 tri,  59 strip,  54 fan,    11 ind,    26.6 ms
-Old:   574 vert,   1 cntr,   572 tri,   0 strip,  31 fan,   499 ind,    12.4 ms
-
-  Multiple contours, but no intersections:
-
-New:     7 vert,   2 cntr,     7 tri,   1 strip,   0 fan,     0 ind,   0.527 ms
-Old:     7 vert,   2 cntr,     7 tri,   0 strip,   0 fan,     7 ind,   0.274 ms
-New:    81 vert,   6 cntr,    89 tri,   9 strip,   7 fan,     6 ind,    3.88 ms
-Old:    81 vert,   6 cntr,    89 tri,   0 strip,  13 fan,    61 ind,     2.2 ms
-New:   391 vert,  19 cntr,   413 tri,  37 strip,  32 fan,    26 ind,    20.2 ms
-Old:   391 vert,  19 cntr,   413 tri,   0 strip,  25 fan,   363 ind,    8.68 ms
-
-  Self-intersecting and degenerate examples:
-
-Bowtie:  4 vert,   1 cntr,     2 tri,   0 strip,   0 fan,     2 ind,   0.483 ms
-Star:    5 vert,   1 cntr,     5 tri,   0 strip,   0 fan,     5 ind,    0.91 ms
-Random: 24 vert,   7 cntr,    46 tri,   2 strip,  12 fan,     7 ind,    5.32 ms
-Font:  333 vert,   2 cntr,   331 tri,  32 strip,  16 fan,     3 ind,    14.1 ms
-:      167 vert,  35 cntr,   254 tri,   8 strip,  56 fan,    52 ind,    46.3 ms
-:       78 vert,   1 cntr,  2675 tri, 148 strip, 207 fan,   180 ind,     243 ms
-:    12480 vert,   2 cntr, 12478 tri, 736 strip,1275 fan,     5 ind,    1010 ms
diff --git a/mesalib/src/glu/sgi/libtess/alg-outline b/mesalib/src/glu/sgi/libtess/alg-outline
deleted file mode 100644
index 33fd69728..000000000
--- a/mesalib/src/glu/sgi/libtess/alg-outline
+++ /dev/null
@@ -1,228 +0,0 @@
-/*
-*/
-
-This is only a very brief overview.  There is quite a bit of
-additional documentation in the source code itself.
-
-
-Goals of robust tesselation
----------------------------
-
-The tesselation algorithm is fundamentally a 2D algorithm.  We
-initially project all data into a plane; our goal is to robustly
-tesselate the projected data.  The same topological tesselation is
-then applied to the input data.
-
-Topologically, the output should always be a tesselation.  If the
-input is even slightly non-planar, then some triangles will
-necessarily be back-facing when viewed from some angles, but the goal
-is to minimize this effect.
-
-The algorithm needs some capability of cleaning up the input data as
-well as the numerical errors in its own calculations.  One way to do
-this is to specify a tolerance as defined above, and clean up the
-input and output during the line sweep process.  At the very least,
-the algorithm must handle coincident vertices, vertices incident to an
-edge, and coincident edges.
-
-
-Phases of the algorithm
------------------------
-
-1. Find the polygon normal N.
-2. Project the vertex data onto a plane.  It does not need to be
-   perpendicular to the normal, eg. we can project onto the plane
-   perpendicular to the coordinate axis whose dot product with N
-   is largest.
-3. Using a line-sweep algorithm, partition the plane into x-monotone
-   regions.  Any vertical line intersects an x-monotone region in
-   at most one interval.
-4. Triangulate the x-monotone regions.
-5. Group the triangles into strips and fans.
-
-
-Finding the normal vector
--------------------------
-
-A common way to find a polygon normal is to compute the signed area
-when the polygon is projected along the three coordinate axes.  We
-can't do this, since contours can have zero area without being
-degenerate (eg. a bowtie).
-
-We fit a plane to the vertex data, ignoring how they are connected
-into contours.  Ideally this would be a least-squares fit; however for
-our purpose the accuracy of the normal is not important.  Instead we
-find three vertices which are widely separated, and compute the normal
-to the triangle they form.  The vertices are chosen so that the
-triangle has an area at least 1/sqrt(3) times the largest area of any
-triangle formed using the input vertices.  
-
-The contours do affect the orientation of the normal; after computing
-the normal, we check that the sum of the signed contour areas is
-non-negative, and reverse the normal if necessary.
-
-
-Projecting the vertices
------------------------
-
-We project the vertices onto a plane perpendicular to one of the three
-coordinate axes.  This helps numerical accuracy by removing a
-transformation step between the original input data and the data
-processed by the algorithm.  The projection also compresses the input
-data; the 2D distance between vertices after projection may be smaller
-than the original 2D distance.  However by choosing the coordinate
-axis whose dot product with the normal is greatest, the compression
-factor is at most 1/sqrt(3).
-
-Even though the *accuracy* of the normal is not that important (since
-we are projecting perpendicular to a coordinate axis anyway), the
-*robustness* of the computation is important.  For example, if there
-are many vertices which lie almost along a line, and one vertex V
-which is well-separated from the line, then our normal computation
-should involve V otherwise the results will be garbage.
-
-The advantage of projecting perpendicular to the polygon normal is
-that computed intersection points will be as close as possible to
-their ideal locations.  To get this behavior, define TRUE_PROJECT.
-
-
-The Line Sweep
---------------
-
-There are three data structures: the mesh, the event queue, and the
-edge dictionary.
-
-The mesh is a "quad-edge" data structure which records the topology of
-the current decomposition; for details see the include file "mesh.h".
-
-The event queue simply holds all vertices (both original and computed
-ones), organized so that we can quickly extract the vertex with the
-minimum x-coord (and among those, the one with the minimum y-coord).
-
-The edge dictionary describes the current intersection of the sweep
-line with the regions of the polygon.  This is just an ordering of the
-edges which intersect the sweep line, sorted by their current order of
-intersection.  For each pair of edges, we store some information about
-the monotone region between them -- these are call "active regions"
-(since they are crossed by the current sweep line).
-
-The basic algorithm is to sweep from left to right, processing each
-vertex.  The processed portion of the mesh (left of the sweep line) is
-a planar decomposition.  As we cross each vertex, we update the mesh
-and the edge dictionary, then we check any newly adjacent pairs of
-edges to see if they intersect.
-
-A vertex can have any number of edges.  Vertices with many edges can
-be created as vertices are merged and intersection points are
-computed.  For unprocessed vertices (right of the sweep line), these
-edges are in no particular order around the vertex; for processed
-vertices, the topological ordering should match the geometric ordering.
-
-The vertex processing happens in two phases: first we process are the
-left-going edges (all these edges are currently in the edge
-dictionary).  This involves:
-
- - deleting the left-going edges from the dictionary;
- - relinking the mesh if necessary, so that the order of these edges around
-   the event vertex matches the order in the dictionary;
- - marking any terminated regions (regions which lie between two left-going
-   edges) as either "inside" or "outside" according to their winding number.
-
-When there are no left-going edges, and the event vertex is in an
-"interior" region, we need to add an edge (to split the region into
-monotone pieces).  To do this we simply join the event vertex to the
-rightmost left endpoint of the upper or lower edge of the containing
-region.
-
-Then we process the right-going edges.  This involves:
-
- - inserting the edges in the edge dictionary;
- - computing the winding number of any newly created active regions.
-   We can compute this incrementally using the winding of each edge
-   that we cross as we walk through the dictionary.
- - relinking the mesh if necessary, so that the order of these edges around
-   the event vertex matches the order in the dictionary;
- - checking any newly adjacent edges for intersection and/or merging.
-
-If there are no right-going edges, again we need to add one to split
-the containing region into monotone pieces.  In our case it is most
-convenient to add an edge to the leftmost right endpoint of either
-containing edge; however we may need to change this later (see the
-code for details).
-
-
-Invariants
-----------
-
-These are the most important invariants maintained during the sweep.
-We define a function VertLeq(v1,v2) which defines the order in which
-vertices cross the sweep line, and a function EdgeLeq(e1,e2; loc)
-which says whether e1 is below e2 at the sweep event location "loc".
-This function is defined only at sweep event locations which lie
-between the rightmost left endpoint of {e1,e2}, and the leftmost right
-endpoint of {e1,e2}.
-
-Invariants for the Edge Dictionary.
-
- - Each pair of adjacent edges e2=Succ(e1) satisfies EdgeLeq(e1,e2)
-   at any valid location of the sweep event.
- - If EdgeLeq(e2,e1) as well (at any valid sweep event), then e1 and e2
-   share a common endpoint.
- - For each e in the dictionary, e->Dst has been processed but not e->Org.
- - Each edge e satisfies VertLeq(e->Dst,event) && VertLeq(event,e->Org)
-   where "event" is the current sweep line event.
- - No edge e has zero length.
- - No two edges have identical left and right endpoints.
- 
-Invariants for the Mesh (the processed portion).
-
- - The portion of the mesh left of the sweep line is a planar graph,
-   ie. there is *some* way to embed it in the plane.
- - No processed edge has zero length.
- - No two processed vertices have identical coordinates.
- - Each "inside" region is monotone, ie. can be broken into two chains
-   of monotonically increasing vertices according to VertLeq(v1,v2)
-   - a non-invariant: these chains may intersect (slightly) due to
-     numerical errors, but this does not affect the algorithm's operation.
-
-Invariants for the Sweep.
-
- - If a vertex has any left-going edges, then these must be in the edge
-   dictionary at the time the vertex is processed.
- - If an edge is marked "fixUpperEdge" (it is a temporary edge introduced
-   by ConnectRightVertex), then it is the only right-going edge from
-   its associated vertex.  (This says that these edges exist only
-   when it is necessary.)
-
-
-Robustness
-----------
-
-The key to the robustness of the algorithm is maintaining the
-invariants above, especially the correct ordering of the edge
-dictionary.  We achieve this by:
-
-  1. Writing the numerical computations for maximum precision rather
-     than maximum speed.
-     
-  2. Making no assumptions at all about the results of the edge
-     intersection calculations -- for sufficiently degenerate inputs,
-     the computed location is not much better than a random number.
-     
-  3. When numerical errors violate the invariants, restore them
-     by making *topological* changes when necessary (ie. relinking
-     the mesh structure).
-     
-     
-Triangulation and Grouping
---------------------------
-
-We finish the line sweep before doing any triangulation.  This is
-because even after a monotone region is complete, there can be further
-changes to its vertex data because of further vertex merging.
-
-After triangulating all monotone regions, we want to group the
-triangles into fans and strips.  We do this using a greedy approach.
-The triangulation itself is not optimized to reduce the number of
-primitives; we just try to get a reasonable decomposition of the
-computed triangulation.
diff --git a/mesalib/src/glu/sgi/libtess/dict-list.h b/mesalib/src/glu/sgi/libtess/dict-list.h
deleted file mode 100644
index 11331a76e..000000000
--- a/mesalib/src/glu/sgi/libtess/dict-list.h
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __dict_list_h_
-#define __dict_list_h_
-
-/* Use #define's so that another heap implementation can use this one */
-
-#define DictKey		DictListKey
-#define Dict		DictList
-#define DictNode	DictListNode
-
-#define dictNewDict(frame,leq)		__gl_dictListNewDict(frame,leq)
-#define dictDeleteDict(dict)		__gl_dictListDeleteDict(dict)
-
-#define dictSearch(dict,key)		__gl_dictListSearch(dict,key)
-#define dictInsert(dict,key)		__gl_dictListInsert(dict,key)
-#define dictInsertBefore(dict,node,key)	__gl_dictListInsertBefore(dict,node,key)
-#define dictDelete(dict,node)		__gl_dictListDelete(dict,node)
-
-#define dictKey(n)			__gl_dictListKey(n)
-#define dictSucc(n)			__gl_dictListSucc(n)
-#define dictPred(n)			__gl_dictListPred(n)
-#define dictMin(d)			__gl_dictListMin(d)
-#define dictMax(d)			__gl_dictListMax(d)
-
-
-
-typedef void *DictKey;
-typedef struct Dict Dict;
-typedef struct DictNode DictNode;
-
-Dict		*dictNewDict(
-			void *frame,
-			int (*leq)(void *frame, DictKey key1, DictKey key2) );
-			
-void		dictDeleteDict( Dict *dict );
-
-/* Search returns the node with the smallest key greater than or equal
- * to the given key.  If there is no such key, returns a node whose
- * key is NULL.  Similarly, Succ(Max(d)) has a NULL key, etc.
- */
-DictNode	*dictSearch( Dict *dict, DictKey key );
-DictNode	*dictInsertBefore( Dict *dict, DictNode *node, DictKey key );
-void		dictDelete( Dict *dict, DictNode *node );
-
-#define		__gl_dictListKey(n)	((n)->key)
-#define		__gl_dictListSucc(n)	((n)->next)
-#define		__gl_dictListPred(n)	((n)->prev)
-#define		__gl_dictListMin(d)	((d)->head.next)
-#define		__gl_dictListMax(d)	((d)->head.prev)
-#define	       __gl_dictListInsert(d,k) (dictInsertBefore((d),&(d)->head,(k)))
-
-
-/*** Private data structures ***/
-
-struct DictNode {
-  DictKey	key;
-  DictNode	*next;
-  DictNode	*prev;
-};
-
-struct Dict {
-  DictNode	head;
-  void		*frame;
-  int		(*leq)(void *frame, DictKey key1, DictKey key2);
-};
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/dict.c b/mesalib/src/glu/sgi/libtess/dict.c
deleted file mode 100644
index 49d4f759e..000000000
--- a/mesalib/src/glu/sgi/libtess/dict.c
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#include <stddef.h>
-#include "dict-list.h"
-#include "memalloc.h"
-
-/* really __gl_dictListNewDict */
-Dict *dictNewDict( void *frame,
-		   int (*leq)(void *frame, DictKey key1, DictKey key2) )
-{
-  Dict *dict = (Dict *) memAlloc( sizeof( Dict ));
-  DictNode *head;
-
-  if (dict == NULL) return NULL;
-
-  head = &dict->head;
-
-  head->key = NULL;
-  head->next = head;
-  head->prev = head;
-
-  dict->frame = frame;
-  dict->leq = leq;
-
-  return dict;
-}
-
-/* really __gl_dictListDeleteDict */
-void dictDeleteDict( Dict *dict )
-{
-  DictNode *node, *next;
-
-  for( node = dict->head.next; node != &dict->head; node = next ) {
-    next = node->next;
-    memFree( node );
-  }
-  memFree( dict );
-}
-
-/* really __gl_dictListInsertBefore */
-DictNode *dictInsertBefore( Dict *dict, DictNode *node, DictKey key )
-{
-  DictNode *newNode;
-
-  do {
-    node = node->prev;
-  } while( node->key != NULL && ! (*dict->leq)(dict->frame, node->key, key));
-
-  newNode = (DictNode *) memAlloc( sizeof( DictNode ));
-  if (newNode == NULL) return NULL;
-
-  newNode->key = key;
-  newNode->next = node->next;
-  node->next->prev = newNode;
-  newNode->prev = node;
-  node->next = newNode;
-
-  return newNode;
-}
-
-/* really __gl_dictListDelete */
-void dictDelete( Dict *dict, DictNode *node ) /*ARGSUSED*/
-{
-  node->next->prev = node->prev;
-  node->prev->next = node->next;
-  memFree( node );
-}
-
-/* really __gl_dictListSearch */
-DictNode *dictSearch( Dict *dict, DictKey key )
-{
-  DictNode *node = &dict->head;
-
-  do {
-    node = node->next;
-  } while( node->key != NULL && ! (*dict->leq)(dict->frame, key, node->key));
-
-  return node;
-}
diff --git a/mesalib/src/glu/sgi/libtess/dict.h b/mesalib/src/glu/sgi/libtess/dict.h
deleted file mode 100644
index 11331a76e..000000000
--- a/mesalib/src/glu/sgi/libtess/dict.h
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __dict_list_h_
-#define __dict_list_h_
-
-/* Use #define's so that another heap implementation can use this one */
-
-#define DictKey		DictListKey
-#define Dict		DictList
-#define DictNode	DictListNode
-
-#define dictNewDict(frame,leq)		__gl_dictListNewDict(frame,leq)
-#define dictDeleteDict(dict)		__gl_dictListDeleteDict(dict)
-
-#define dictSearch(dict,key)		__gl_dictListSearch(dict,key)
-#define dictInsert(dict,key)		__gl_dictListInsert(dict,key)
-#define dictInsertBefore(dict,node,key)	__gl_dictListInsertBefore(dict,node,key)
-#define dictDelete(dict,node)		__gl_dictListDelete(dict,node)
-
-#define dictKey(n)			__gl_dictListKey(n)
-#define dictSucc(n)			__gl_dictListSucc(n)
-#define dictPred(n)			__gl_dictListPred(n)
-#define dictMin(d)			__gl_dictListMin(d)
-#define dictMax(d)			__gl_dictListMax(d)
-
-
-
-typedef void *DictKey;
-typedef struct Dict Dict;
-typedef struct DictNode DictNode;
-
-Dict		*dictNewDict(
-			void *frame,
-			int (*leq)(void *frame, DictKey key1, DictKey key2) );
-			
-void		dictDeleteDict( Dict *dict );
-
-/* Search returns the node with the smallest key greater than or equal
- * to the given key.  If there is no such key, returns a node whose
- * key is NULL.  Similarly, Succ(Max(d)) has a NULL key, etc.
- */
-DictNode	*dictSearch( Dict *dict, DictKey key );
-DictNode	*dictInsertBefore( Dict *dict, DictNode *node, DictKey key );
-void		dictDelete( Dict *dict, DictNode *node );
-
-#define		__gl_dictListKey(n)	((n)->key)
-#define		__gl_dictListSucc(n)	((n)->next)
-#define		__gl_dictListPred(n)	((n)->prev)
-#define		__gl_dictListMin(d)	((d)->head.next)
-#define		__gl_dictListMax(d)	((d)->head.prev)
-#define	       __gl_dictListInsert(d,k) (dictInsertBefore((d),&(d)->head,(k)))
-
-
-/*** Private data structures ***/
-
-struct DictNode {
-  DictKey	key;
-  DictNode	*next;
-  DictNode	*prev;
-};
-
-struct Dict {
-  DictNode	head;
-  void		*frame;
-  int		(*leq)(void *frame, DictKey key1, DictKey key2);
-};
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/geom.c b/mesalib/src/glu/sgi/libtess/geom.c
deleted file mode 100644
index 35b36a394..000000000
--- a/mesalib/src/glu/sgi/libtess/geom.c
+++ /dev/null
@@ -1,264 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#include "gluos.h"
-#include <assert.h>
-#include "mesh.h"
-#include "geom.h"
-
-int __gl_vertLeq( GLUvertex *u, GLUvertex *v )
-{
-  /* Returns TRUE if u is lexicographically <= v. */
-
-  return VertLeq( u, v );
-}
-
-GLdouble __gl_edgeEval( GLUvertex *u, GLUvertex *v, GLUvertex *w )
-{
-  /* Given three vertices u,v,w such that VertLeq(u,v) && VertLeq(v,w),
-   * evaluates the t-coord of the edge uw at the s-coord of the vertex v.
-   * Returns v->t - (uw)(v->s), ie. the signed distance from uw to v.
-   * If uw is vertical (and thus passes thru v), the result is zero.
-   *
-   * The calculation is extremely accurate and stable, even when v
-   * is very close to u or w.  In particular if we set v->t = 0 and
-   * let r be the negated result (this evaluates (uw)(v->s)), then
-   * r is guaranteed to satisfy MIN(u->t,w->t) <= r <= MAX(u->t,w->t).
-   */
-  GLdouble gapL, gapR;
-
-  assert( VertLeq( u, v ) && VertLeq( v, w ));
-  
-  gapL = v->s - u->s;
-  gapR = w->s - v->s;
-
-  if( gapL + gapR > 0 ) {
-    if( gapL < gapR ) {
-      return (v->t - u->t) + (u->t - w->t) * (gapL / (gapL + gapR));
-    } else {
-      return (v->t - w->t) + (w->t - u->t) * (gapR / (gapL + gapR));
-    }
-  }
-  /* vertical line */
-  return 0;
-}
-
-GLdouble __gl_edgeSign( GLUvertex *u, GLUvertex *v, GLUvertex *w )
-{
-  /* Returns a number whose sign matches EdgeEval(u,v,w) but which
-   * is cheaper to evaluate.  Returns > 0, == 0 , or < 0
-   * as v is above, on, or below the edge uw.
-   */
-  GLdouble gapL, gapR;
-
-  assert( VertLeq( u, v ) && VertLeq( v, w ));
-  
-  gapL = v->s - u->s;
-  gapR = w->s - v->s;
-
-  if( gapL + gapR > 0 ) {
-    return (v->t - w->t) * gapL + (v->t - u->t) * gapR;
-  }
-  /* vertical line */
-  return 0;
-}
-
-
-/***********************************************************************
- * Define versions of EdgeSign, EdgeEval with s and t transposed.
- */
-
-GLdouble __gl_transEval( GLUvertex *u, GLUvertex *v, GLUvertex *w )
-{
-  /* Given three vertices u,v,w such that TransLeq(u,v) && TransLeq(v,w),
-   * evaluates the t-coord of the edge uw at the s-coord of the vertex v.
-   * Returns v->s - (uw)(v->t), ie. the signed distance from uw to v.
-   * If uw is vertical (and thus passes thru v), the result is zero.
-   *
-   * The calculation is extremely accurate and stable, even when v
-   * is very close to u or w.  In particular if we set v->s = 0 and
-   * let r be the negated result (this evaluates (uw)(v->t)), then
-   * r is guaranteed to satisfy MIN(u->s,w->s) <= r <= MAX(u->s,w->s).
-   */
-  GLdouble gapL, gapR;
-
-  assert( TransLeq( u, v ) && TransLeq( v, w ));
-  
-  gapL = v->t - u->t;
-  gapR = w->t - v->t;
-
-  if( gapL + gapR > 0 ) {
-    if( gapL < gapR ) {
-      return (v->s - u->s) + (u->s - w->s) * (gapL / (gapL + gapR));
-    } else {
-      return (v->s - w->s) + (w->s - u->s) * (gapR / (gapL + gapR));
-    }
-  }
-  /* vertical line */
-  return 0;
-}
-
-GLdouble __gl_transSign( GLUvertex *u, GLUvertex *v, GLUvertex *w )
-{
-  /* Returns a number whose sign matches TransEval(u,v,w) but which
-   * is cheaper to evaluate.  Returns > 0, == 0 , or < 0
-   * as v is above, on, or below the edge uw.
-   */
-  GLdouble gapL, gapR;
-
-  assert( TransLeq( u, v ) && TransLeq( v, w ));
-  
-  gapL = v->t - u->t;
-  gapR = w->t - v->t;
-
-  if( gapL + gapR > 0 ) {
-    return (v->s - w->s) * gapL + (v->s - u->s) * gapR;
-  }
-  /* vertical line */
-  return 0;
-}
-
-
-int __gl_vertCCW( GLUvertex *u, GLUvertex *v, GLUvertex *w )
-{
-  /* For almost-degenerate situations, the results are not reliable.
-   * Unless the floating-point arithmetic can be performed without
-   * rounding errors, *any* implementation will give incorrect results
-   * on some degenerate inputs, so the client must have some way to
-   * handle this situation.
-   */
-  return (u->s*(v->t - w->t) + v->s*(w->t - u->t) + w->s*(u->t - v->t)) >= 0;
-}
-
-/* Given parameters a,x,b,y returns the value (b*x+a*y)/(a+b),
- * or (x+y)/2 if a==b==0.  It requires that a,b >= 0, and enforces
- * this in the rare case that one argument is slightly negative.
- * The implementation is extremely stable numerically.
- * In particular it guarantees that the result r satisfies
- * MIN(x,y) <= r <= MAX(x,y), and the results are very accurate
- * even when a and b differ greatly in magnitude.
- */
-#define RealInterpolate(a,x,b,y)			\
-  (a = (a < 0) ? 0 : a, b = (b < 0) ? 0 : b,		\
-  ((a <= b) ? ((b == 0) ? ((x+y) / 2)			\
-                        : (x + (y-x) * (a/(a+b))))	\
-            : (y + (x-y) * (b/(a+b)))))
-
-#ifndef FOR_TRITE_TEST_PROGRAM
-#define Interpolate(a,x,b,y)	RealInterpolate(a,x,b,y)
-#else
-
-/* Claim: the ONLY property the sweep algorithm relies on is that
- * MIN(x,y) <= r <= MAX(x,y).  This is a nasty way to test that.
- */
-#include <stdlib.h>
-extern int RandomInterpolate;
-
-GLdouble Interpolate( GLdouble a, GLdouble x, GLdouble b, GLdouble y)
-{
-printf("*********************%d\n",RandomInterpolate);
-  if( RandomInterpolate ) {
-    a = 1.2 * drand48() - 0.1;
-    a = (a < 0) ? 0 : ((a > 1) ? 1 : a);
-    b = 1.0 - a;
-  }
-  return RealInterpolate(a,x,b,y);
-}
-
-#endif
-
-#define Swap(a,b)	do { GLUvertex *t = a; a = b; b = t; } while (0)
-
-void __gl_edgeIntersect( GLUvertex *o1, GLUvertex *d1,
-			 GLUvertex *o2, GLUvertex *d2,
-			 GLUvertex *v )
-/* Given edges (o1,d1) and (o2,d2), compute their point of intersection.
- * The computed point is guaranteed to lie in the intersection of the
- * bounding rectangles defined by each edge.
- */
-{
-  GLdouble z1, z2;
-
-  /* This is certainly not the most efficient way to find the intersection
-   * of two line segments, but it is very numerically stable.
-   *
-   * Strategy: find the two middle vertices in the VertLeq ordering,
-   * and interpolate the intersection s-value from these.  Then repeat
-   * using the TransLeq ordering to find the intersection t-value.
-   */
-
-  if( ! VertLeq( o1, d1 )) { Swap( o1, d1 ); }
-  if( ! VertLeq( o2, d2 )) { Swap( o2, d2 ); }
-  if( ! VertLeq( o1, o2 )) { Swap( o1, o2 ); Swap( d1, d2 ); }
-
-  if( ! VertLeq( o2, d1 )) {
-    /* Technically, no intersection -- do our best */
-    v->s = (o2->s + d1->s) / 2;
-  } else if( VertLeq( d1, d2 )) {
-    /* Interpolate between o2 and d1 */
-    z1 = EdgeEval( o1, o2, d1 );
-    z2 = EdgeEval( o2, d1, d2 );
-    if( z1+z2 < 0 ) { z1 = -z1; z2 = -z2; }
-    v->s = Interpolate( z1, o2->s, z2, d1->s );
-  } else {
-    /* Interpolate between o2 and d2 */
-    z1 = EdgeSign( o1, o2, d1 );
-    z2 = -EdgeSign( o1, d2, d1 );
-    if( z1+z2 < 0 ) { z1 = -z1; z2 = -z2; }
-    v->s = Interpolate( z1, o2->s, z2, d2->s );
-  }
-
-  /* Now repeat the process for t */
-
-  if( ! TransLeq( o1, d1 )) { Swap( o1, d1 ); }
-  if( ! TransLeq( o2, d2 )) { Swap( o2, d2 ); }
-  if( ! TransLeq( o1, o2 )) { Swap( o1, o2 ); Swap( d1, d2 ); }
-
-  if( ! TransLeq( o2, d1 )) {
-    /* Technically, no intersection -- do our best */
-    v->t = (o2->t + d1->t) / 2;
-  } else if( TransLeq( d1, d2 )) {
-    /* Interpolate between o2 and d1 */
-    z1 = TransEval( o1, o2, d1 );
-    z2 = TransEval( o2, d1, d2 );
-    if( z1+z2 < 0 ) { z1 = -z1; z2 = -z2; }
-    v->t = Interpolate( z1, o2->t, z2, d1->t );
-  } else {
-    /* Interpolate between o2 and d2 */
-    z1 = TransSign( o1, o2, d1 );
-    z2 = -TransSign( o1, d2, d1 );
-    if( z1+z2 < 0 ) { z1 = -z1; z2 = -z2; }
-    v->t = Interpolate( z1, o2->t, z2, d2->t );
-  }
-}
diff --git a/mesalib/src/glu/sgi/libtess/geom.h b/mesalib/src/glu/sgi/libtess/geom.h
deleted file mode 100644
index 5cb76c7d1..000000000
--- a/mesalib/src/glu/sgi/libtess/geom.h
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __geom_h_
-#define __geom_h_
-
-#include "mesh.h"
-
-#ifdef NO_BRANCH_CONDITIONS
-/* MIPS architecture has special instructions to evaluate boolean
- * conditions -- more efficient than branching, IF you can get the
- * compiler to generate the right instructions (SGI compiler doesn't)
- */
-#define VertEq(u,v)	(((u)->s == (v)->s) & ((u)->t == (v)->t))
-#define VertLeq(u,v)	(((u)->s < (v)->s) | \
-                         ((u)->s == (v)->s & (u)->t <= (v)->t))
-#else
-#define VertEq(u,v)	((u)->s == (v)->s && (u)->t == (v)->t)
-#define VertLeq(u,v)	(((u)->s < (v)->s) || \
-                         ((u)->s == (v)->s && (u)->t <= (v)->t))
-#endif
-
-#define EdgeEval(u,v,w) __gl_edgeEval(u,v,w)
-#define EdgeSign(u,v,w) __gl_edgeSign(u,v,w)
-
-/* Versions of VertLeq, EdgeSign, EdgeEval with s and t transposed. */
-
-#define TransLeq(u,v)	(((u)->t < (v)->t) || \
-                         ((u)->t == (v)->t && (u)->s <= (v)->s))
-#define TransEval(u,v,w)	__gl_transEval(u,v,w)
-#define TransSign(u,v,w)	__gl_transSign(u,v,w)
-
-
-#define EdgeGoesLeft(e) 	VertLeq( (e)->Dst, (e)->Org )
-#define EdgeGoesRight(e)	VertLeq( (e)->Org, (e)->Dst )
-
-#undef	ABS
-#define ABS(x)	((x) < 0 ? -(x) : (x))
-#define VertL1dist(u,v) (ABS(u->s - v->s) + ABS(u->t - v->t))
-
-#define VertCCW(u,v,w)	__gl_vertCCW(u,v,w)
-
-int		__gl_vertLeq( GLUvertex *u, GLUvertex *v );
-GLdouble	__gl_edgeEval( GLUvertex *u, GLUvertex *v, GLUvertex *w );
-GLdouble	__gl_edgeSign( GLUvertex *u, GLUvertex *v, GLUvertex *w );
-GLdouble	__gl_transEval( GLUvertex *u, GLUvertex *v, GLUvertex *w );
-GLdouble	__gl_transSign( GLUvertex *u, GLUvertex *v, GLUvertex *w );
-int		__gl_vertCCW( GLUvertex *u, GLUvertex *v, GLUvertex *w );
-void		__gl_edgeIntersect( GLUvertex *o1, GLUvertex *d1,
-				    GLUvertex *o2, GLUvertex *d2,
-				    GLUvertex *v );
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/memalloc.c b/mesalib/src/glu/sgi/libtess/memalloc.c
deleted file mode 100644
index 81879ef78..000000000
--- a/mesalib/src/glu/sgi/libtess/memalloc.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#include "memalloc.h"
-#include "string.h"
-
-int __gl_memInit( size_t maxFast )
-{
-#ifndef NO_MALLOPT
-/*  mallopt( M_MXFAST, maxFast );*/
-#ifdef MEMORY_DEBUG
-  mallopt( M_DEBUG, 1 );
-#endif
-#endif
-   return 1;
-}
-
-#ifdef MEMORY_DEBUG
-void *__gl_memAlloc( size_t n )
-{
-  return memset( malloc( n ), 0xa5, n );
-}
-#endif
-
diff --git a/mesalib/src/glu/sgi/libtess/memalloc.h b/mesalib/src/glu/sgi/libtess/memalloc.h
deleted file mode 100644
index c2f969b8b..000000000
--- a/mesalib/src/glu/sgi/libtess/memalloc.h
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __memalloc_simple_h_
-#define __memalloc_simple_h_
-
-#include <stdlib.h>
-
-#define memRealloc	realloc
-#define memFree		free
-
-#define memInit		__gl_memInit
-/*extern void		__gl_memInit( size_t );*/
-extern int		__gl_memInit( size_t );
-
-#ifndef MEMORY_DEBUG
-#define memAlloc	malloc
-#else
-#define memAlloc	__gl_memAlloc
-extern void *		__gl_memAlloc( size_t );
-#endif
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/mesh.c b/mesalib/src/glu/sgi/libtess/mesh.c
deleted file mode 100644
index 36cb3a7be..000000000
--- a/mesalib/src/glu/sgi/libtess/mesh.c
+++ /dev/null
@@ -1,798 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#include "gluos.h"
-#include <stddef.h>
-#include <assert.h>
-#include "mesh.h"
-#include "memalloc.h"
-
-#ifndef TRUE
-#define TRUE 1
-#endif
-#ifndef FALSE
-#define FALSE 0
-#endif
-
-static GLUvertex *allocVertex()
-{
-   return (GLUvertex *)memAlloc( sizeof( GLUvertex ));
-}
-
-static GLUface *allocFace()
-{
-   return (GLUface *)memAlloc( sizeof( GLUface ));
-}
-
-/************************ Utility Routines ************************/
-
-/* Allocate and free half-edges in pairs for efficiency.
- * The *only* place that should use this fact is allocation/free.
- */
-typedef struct { GLUhalfEdge e, eSym; } EdgePair;
-
-/* MakeEdge creates a new pair of half-edges which form their own loop.
- * No vertex or face structures are allocated, but these must be assigned
- * before the current edge operation is completed.
- */
-static GLUhalfEdge *MakeEdge( GLUhalfEdge *eNext )
-{
-  GLUhalfEdge *e;
-  GLUhalfEdge *eSym;
-  GLUhalfEdge *ePrev;
-  EdgePair *pair = (EdgePair *)memAlloc( sizeof( EdgePair ));
-  if (pair == NULL) return NULL;
-
-  e = &pair->e;
-  eSym = &pair->eSym;
-
-  /* Make sure eNext points to the first edge of the edge pair */
-  if( eNext->Sym < eNext ) { eNext = eNext->Sym; }
-
-  /* Insert in circular doubly-linked list before eNext.
-   * Note that the prev pointer is stored in Sym->next.
-   */
-  ePrev = eNext->Sym->next;
-  eSym->next = ePrev;
-  ePrev->Sym->next = e;
-  e->next = eNext;
-  eNext->Sym->next = eSym;
-
-  e->Sym = eSym;
-  e->Onext = e;
-  e->Lnext = eSym;
-  e->Org = NULL;
-  e->Lface = NULL;
-  e->winding = 0;
-  e->activeRegion = NULL;
-
-  eSym->Sym = e;
-  eSym->Onext = eSym;
-  eSym->Lnext = e;
-  eSym->Org = NULL;
-  eSym->Lface = NULL;
-  eSym->winding = 0;
-  eSym->activeRegion = NULL;
-
-  return e;
-}
-
-/* Splice( a, b ) is best described by the Guibas/Stolfi paper or the
- * CS348a notes (see mesh.h).  Basically it modifies the mesh so that
- * a->Onext and b->Onext are exchanged.  This can have various effects
- * depending on whether a and b belong to different face or vertex rings.
- * For more explanation see __gl_meshSplice() below.
- */
-static void Splice( GLUhalfEdge *a, GLUhalfEdge *b )
-{
-  GLUhalfEdge *aOnext = a->Onext;
-  GLUhalfEdge *bOnext = b->Onext;
-
-  aOnext->Sym->Lnext = b;
-  bOnext->Sym->Lnext = a;
-  a->Onext = bOnext;
-  b->Onext = aOnext;
-}
-
-/* MakeVertex( newVertex, eOrig, vNext ) attaches a new vertex and makes it the
- * origin of all edges in the vertex loop to which eOrig belongs. "vNext" gives
- * a place to insert the new vertex in the global vertex list.  We insert
- * the new vertex *before* vNext so that algorithms which walk the vertex
- * list will not see the newly created vertices.
- */
-static void MakeVertex( GLUvertex *newVertex, 
-			GLUhalfEdge *eOrig, GLUvertex *vNext )
-{
-  GLUhalfEdge *e;
-  GLUvertex *vPrev;
-  GLUvertex *vNew = newVertex;
-
-  assert(vNew != NULL);
-
-  /* insert in circular doubly-linked list before vNext */
-  vPrev = vNext->prev;
-  vNew->prev = vPrev;
-  vPrev->next = vNew;
-  vNew->next = vNext;
-  vNext->prev = vNew;
-
-  vNew->anEdge = eOrig;
-  vNew->data = NULL;
-  /* leave coords, s, t undefined */
-
-  /* fix other edges on this vertex loop */
-  e = eOrig;
-  do {
-    e->Org = vNew;
-    e = e->Onext;
-  } while( e != eOrig );
-}
-
-/* MakeFace( newFace, eOrig, fNext ) attaches a new face and makes it the left
- * face of all edges in the face loop to which eOrig belongs.  "fNext" gives
- * a place to insert the new face in the global face list.  We insert
- * the new face *before* fNext so that algorithms which walk the face
- * list will not see the newly created faces.
- */
-static void MakeFace( GLUface *newFace, GLUhalfEdge *eOrig, GLUface *fNext )
-{
-  GLUhalfEdge *e;
-  GLUface *fPrev;
-  GLUface *fNew = newFace;
-
-  assert(fNew != NULL); 
-
-  /* insert in circular doubly-linked list before fNext */
-  fPrev = fNext->prev;
-  fNew->prev = fPrev;
-  fPrev->next = fNew;
-  fNew->next = fNext;
-  fNext->prev = fNew;
-
-  fNew->anEdge = eOrig;
-  fNew->data = NULL;
-  fNew->trail = NULL;
-  fNew->marked = FALSE;
-
-  /* The new face is marked "inside" if the old one was.  This is a
-   * convenience for the common case where a face has been split in two.
-   */
-  fNew->inside = fNext->inside;
-
-  /* fix other edges on this face loop */
-  e = eOrig;
-  do {
-    e->Lface = fNew;
-    e = e->Lnext;
-  } while( e != eOrig );
-}
-
-/* KillEdge( eDel ) destroys an edge (the half-edges eDel and eDel->Sym),
- * and removes from the global edge list.
- */
-static void KillEdge( GLUhalfEdge *eDel )
-{
-  GLUhalfEdge *ePrev, *eNext;
-
-  /* Half-edges are allocated in pairs, see EdgePair above */
-  if( eDel->Sym < eDel ) { eDel = eDel->Sym; }
-
-  /* delete from circular doubly-linked list */
-  eNext = eDel->next;
-  ePrev = eDel->Sym->next;
-  eNext->Sym->next = ePrev;
-  ePrev->Sym->next = eNext;
-
-  memFree( eDel );
-}
-
-
-/* KillVertex( vDel ) destroys a vertex and removes it from the global
- * vertex list.  It updates the vertex loop to point to a given new vertex.
- */
-static void KillVertex( GLUvertex *vDel, GLUvertex *newOrg )
-{
-  GLUhalfEdge *e, *eStart = vDel->anEdge;
-  GLUvertex *vPrev, *vNext;
-
-  /* change the origin of all affected edges */
-  e = eStart;
-  do {
-    e->Org = newOrg;
-    e = e->Onext;
-  } while( e != eStart );
-
-  /* delete from circular doubly-linked list */
-  vPrev = vDel->prev;
-  vNext = vDel->next;
-  vNext->prev = vPrev;
-  vPrev->next = vNext;
-
-  memFree( vDel );
-}
-
-/* KillFace( fDel ) destroys a face and removes it from the global face
- * list.  It updates the face loop to point to a given new face.
- */
-static void KillFace( GLUface *fDel, GLUface *newLface )
-{
-  GLUhalfEdge *e, *eStart = fDel->anEdge;
-  GLUface *fPrev, *fNext;
-
-  /* change the left face of all affected edges */
-  e = eStart;
-  do {
-    e->Lface = newLface;
-    e = e->Lnext;
-  } while( e != eStart );
-
-  /* delete from circular doubly-linked list */
-  fPrev = fDel->prev;
-  fNext = fDel->next;
-  fNext->prev = fPrev;
-  fPrev->next = fNext;
-
-  memFree( fDel );
-}
-
-
-/****************** Basic Edge Operations **********************/
-
-/* __gl_meshMakeEdge creates one edge, two vertices, and a loop (face).
- * The loop consists of the two new half-edges.
- */
-GLUhalfEdge *__gl_meshMakeEdge( GLUmesh *mesh )
-{
-  GLUvertex *newVertex1= allocVertex();
-  GLUvertex *newVertex2= allocVertex();
-  GLUface *newFace= allocFace();
-  GLUhalfEdge *e;
-
-  /* if any one is null then all get freed */
-  if (newVertex1 == NULL || newVertex2 == NULL || newFace == NULL) {
-     if (newVertex1 != NULL) memFree(newVertex1);
-     if (newVertex2 != NULL) memFree(newVertex2);
-     if (newFace != NULL) memFree(newFace);     
-     return NULL;
-  } 
-
-  e = MakeEdge( &mesh->eHead );
-  if (e == NULL) {
-     memFree(newVertex1);
-     memFree(newVertex2);
-     memFree(newFace);
-     return NULL;
-  }
-
-  MakeVertex( newVertex1, e, &mesh->vHead );
-  MakeVertex( newVertex2, e->Sym, &mesh->vHead );
-  MakeFace( newFace, e, &mesh->fHead );
-  return e;
-}
-  
-
-/* __gl_meshSplice( eOrg, eDst ) is the basic operation for changing the
- * mesh connectivity and topology.  It changes the mesh so that
- *	eOrg->Onext <- OLD( eDst->Onext )
- *	eDst->Onext <- OLD( eOrg->Onext )
- * where OLD(...) means the value before the meshSplice operation.
- *
- * This can have two effects on the vertex structure:
- *  - if eOrg->Org != eDst->Org, the two vertices are merged together
- *  - if eOrg->Org == eDst->Org, the origin is split into two vertices
- * In both cases, eDst->Org is changed and eOrg->Org is untouched.
- *
- * Similarly (and independently) for the face structure,
- *  - if eOrg->Lface == eDst->Lface, one loop is split into two
- *  - if eOrg->Lface != eDst->Lface, two distinct loops are joined into one
- * In both cases, eDst->Lface is changed and eOrg->Lface is unaffected.
- *
- * Some special cases:
- * If eDst == eOrg, the operation has no effect.
- * If eDst == eOrg->Lnext, the new face will have a single edge.
- * If eDst == eOrg->Lprev, the old face will have a single edge.
- * If eDst == eOrg->Onext, the new vertex will have a single edge.
- * If eDst == eOrg->Oprev, the old vertex will have a single edge.
- */
-int __gl_meshSplice( GLUhalfEdge *eOrg, GLUhalfEdge *eDst )
-{
-  int joiningLoops = FALSE;
-  int joiningVertices = FALSE;
-
-  if( eOrg == eDst ) return 1;
-
-  if( eDst->Org != eOrg->Org ) {
-    /* We are merging two disjoint vertices -- destroy eDst->Org */
-    joiningVertices = TRUE;
-    KillVertex( eDst->Org, eOrg->Org );
-  }
-  if( eDst->Lface != eOrg->Lface ) {
-    /* We are connecting two disjoint loops -- destroy eDst->Lface */
-    joiningLoops = TRUE;
-    KillFace( eDst->Lface, eOrg->Lface );
-  }
-
-  /* Change the edge structure */
-  Splice( eDst, eOrg );
-
-  if( ! joiningVertices ) {
-    GLUvertex *newVertex= allocVertex();
-    if (newVertex == NULL) return 0;
-
-    /* We split one vertex into two -- the new vertex is eDst->Org.
-     * Make sure the old vertex points to a valid half-edge.
-     */
-    MakeVertex( newVertex, eDst, eOrg->Org );
-    eOrg->Org->anEdge = eOrg;
-  }
-  if( ! joiningLoops ) {
-    GLUface *newFace= allocFace();  
-    if (newFace == NULL) return 0;
-
-    /* We split one loop into two -- the new loop is eDst->Lface.
-     * Make sure the old face points to a valid half-edge.
-     */
-    MakeFace( newFace, eDst, eOrg->Lface );
-    eOrg->Lface->anEdge = eOrg;
-  }
-
-  return 1;
-}
-
-
-/* __gl_meshDelete( eDel ) removes the edge eDel.  There are several cases:
- * if (eDel->Lface != eDel->Rface), we join two loops into one; the loop
- * eDel->Lface is deleted.  Otherwise, we are splitting one loop into two;
- * the newly created loop will contain eDel->Dst.  If the deletion of eDel
- * would create isolated vertices, those are deleted as well.
- *
- * This function could be implemented as two calls to __gl_meshSplice
- * plus a few calls to memFree, but this would allocate and delete
- * unnecessary vertices and faces.
- */
-int __gl_meshDelete( GLUhalfEdge *eDel )
-{
-  GLUhalfEdge *eDelSym = eDel->Sym;
-  int joiningLoops = FALSE;
-
-  /* First step: disconnect the origin vertex eDel->Org.  We make all
-   * changes to get a consistent mesh in this "intermediate" state.
-   */
-  if( eDel->Lface != eDel->Rface ) {
-    /* We are joining two loops into one -- remove the left face */
-    joiningLoops = TRUE;
-    KillFace( eDel->Lface, eDel->Rface );
-  }
-
-  if( eDel->Onext == eDel ) {
-    KillVertex( eDel->Org, NULL );
-  } else {
-    /* Make sure that eDel->Org and eDel->Rface point to valid half-edges */
-    eDel->Rface->anEdge = eDel->Oprev;
-    eDel->Org->anEdge = eDel->Onext;
-
-    Splice( eDel, eDel->Oprev );
-    if( ! joiningLoops ) {
-      GLUface *newFace= allocFace();
-      if (newFace == NULL) return 0; 
-
-      /* We are splitting one loop into two -- create a new loop for eDel. */
-      MakeFace( newFace, eDel, eDel->Lface );
-    }
-  }
-
-  /* Claim: the mesh is now in a consistent state, except that eDel->Org
-   * may have been deleted.  Now we disconnect eDel->Dst.
-   */
-  if( eDelSym->Onext == eDelSym ) {
-    KillVertex( eDelSym->Org, NULL );
-    KillFace( eDelSym->Lface, NULL );
-  } else {
-    /* Make sure that eDel->Dst and eDel->Lface point to valid half-edges */
-    eDel->Lface->anEdge = eDelSym->Oprev;
-    eDelSym->Org->anEdge = eDelSym->Onext;
-    Splice( eDelSym, eDelSym->Oprev );
-  }
-
-  /* Any isolated vertices or faces have already been freed. */
-  KillEdge( eDel );
-
-  return 1;
-}
-
-
-/******************** Other Edge Operations **********************/
-
-/* All these routines can be implemented with the basic edge
- * operations above.  They are provided for convenience and efficiency.
- */
-
-
-/* __gl_meshAddEdgeVertex( eOrg ) creates a new edge eNew such that
- * eNew == eOrg->Lnext, and eNew->Dst is a newly created vertex.
- * eOrg and eNew will have the same left face.
- */
-GLUhalfEdge *__gl_meshAddEdgeVertex( GLUhalfEdge *eOrg )
-{
-  GLUhalfEdge *eNewSym;
-  GLUhalfEdge *eNew = MakeEdge( eOrg );
-  if (eNew == NULL) return NULL;
-
-  eNewSym = eNew->Sym;
-
-  /* Connect the new edge appropriately */
-  Splice( eNew, eOrg->Lnext );
-
-  /* Set the vertex and face information */
-  eNew->Org = eOrg->Dst;
-  {
-    GLUvertex *newVertex= allocVertex();
-    if (newVertex == NULL) return NULL;
-
-    MakeVertex( newVertex, eNewSym, eNew->Org );
-  }
-  eNew->Lface = eNewSym->Lface = eOrg->Lface;
-
-  return eNew;
-}
-
-
-/* __gl_meshSplitEdge( eOrg ) splits eOrg into two edges eOrg and eNew,
- * such that eNew == eOrg->Lnext.  The new vertex is eOrg->Dst == eNew->Org.
- * eOrg and eNew will have the same left face.
- */
-GLUhalfEdge *__gl_meshSplitEdge( GLUhalfEdge *eOrg )
-{
-  GLUhalfEdge *eNew;
-  GLUhalfEdge *tempHalfEdge= __gl_meshAddEdgeVertex( eOrg );
-  if (tempHalfEdge == NULL) return NULL;
-
-  eNew = tempHalfEdge->Sym;
-
-  /* Disconnect eOrg from eOrg->Dst and connect it to eNew->Org */
-  Splice( eOrg->Sym, eOrg->Sym->Oprev );
-  Splice( eOrg->Sym, eNew );
-
-  /* Set the vertex and face information */
-  eOrg->Dst = eNew->Org;
-  eNew->Dst->anEdge = eNew->Sym;	/* may have pointed to eOrg->Sym */
-  eNew->Rface = eOrg->Rface;
-  eNew->winding = eOrg->winding;	/* copy old winding information */
-  eNew->Sym->winding = eOrg->Sym->winding;
-
-  return eNew;
-}
-
-
-/* __gl_meshConnect( eOrg, eDst ) creates a new edge from eOrg->Dst
- * to eDst->Org, and returns the corresponding half-edge eNew.
- * If eOrg->Lface == eDst->Lface, this splits one loop into two,
- * and the newly created loop is eNew->Lface.  Otherwise, two disjoint
- * loops are merged into one, and the loop eDst->Lface is destroyed.
- *
- * If (eOrg == eDst), the new face will have only two edges.
- * If (eOrg->Lnext == eDst), the old face is reduced to a single edge.
- * If (eOrg->Lnext->Lnext == eDst), the old face is reduced to two edges.
- */
-GLUhalfEdge *__gl_meshConnect( GLUhalfEdge *eOrg, GLUhalfEdge *eDst )
-{
-  GLUhalfEdge *eNewSym;
-  int joiningLoops = FALSE;  
-  GLUhalfEdge *eNew = MakeEdge( eOrg );
-  if (eNew == NULL) return NULL;
-
-  eNewSym = eNew->Sym;
-
-  if( eDst->Lface != eOrg->Lface ) {
-    /* We are connecting two disjoint loops -- destroy eDst->Lface */
-    joiningLoops = TRUE;
-    KillFace( eDst->Lface, eOrg->Lface );
-  }
-
-  /* Connect the new edge appropriately */
-  Splice( eNew, eOrg->Lnext );
-  Splice( eNewSym, eDst );
-
-  /* Set the vertex and face information */
-  eNew->Org = eOrg->Dst;
-  eNewSym->Org = eDst->Org;
-  eNew->Lface = eNewSym->Lface = eOrg->Lface;
-
-  /* Make sure the old face points to a valid half-edge */
-  eOrg->Lface->anEdge = eNewSym;
-
-  if( ! joiningLoops ) {
-    GLUface *newFace= allocFace();
-    if (newFace == NULL) return NULL;
-
-    /* We split one loop into two -- the new loop is eNew->Lface */
-    MakeFace( newFace, eNew, eOrg->Lface );
-  }
-  return eNew;
-}
-
-
-/******************** Other Operations **********************/
-
-/* __gl_meshZapFace( fZap ) destroys a face and removes it from the
- * global face list.  All edges of fZap will have a NULL pointer as their
- * left face.  Any edges which also have a NULL pointer as their right face
- * are deleted entirely (along with any isolated vertices this produces).
- * An entire mesh can be deleted by zapping its faces, one at a time,
- * in any order.  Zapped faces cannot be used in further mesh operations!
- */
-void __gl_meshZapFace( GLUface *fZap )
-{
-  GLUhalfEdge *eStart = fZap->anEdge;
-  GLUhalfEdge *e, *eNext, *eSym;
-  GLUface *fPrev, *fNext;
-
-  /* walk around face, deleting edges whose right face is also NULL */
-  eNext = eStart->Lnext;
-  do {
-    e = eNext;
-    eNext = e->Lnext;
-
-    e->Lface = NULL;
-    if( e->Rface == NULL ) {
-      /* delete the edge -- see __gl_MeshDelete above */
-
-      if( e->Onext == e ) {
-	KillVertex( e->Org, NULL );
-      } else {
-	/* Make sure that e->Org points to a valid half-edge */
-	e->Org->anEdge = e->Onext;
-	Splice( e, e->Oprev );
-      }
-      eSym = e->Sym;
-      if( eSym->Onext == eSym ) {
-	KillVertex( eSym->Org, NULL );
-      } else {
-	/* Make sure that eSym->Org points to a valid half-edge */
-	eSym->Org->anEdge = eSym->Onext;
-	Splice( eSym, eSym->Oprev );
-      }
-      KillEdge( e );
-    }
-  } while( e != eStart );
-
-  /* delete from circular doubly-linked list */
-  fPrev = fZap->prev;
-  fNext = fZap->next;
-  fNext->prev = fPrev;
-  fPrev->next = fNext;
-
-  memFree( fZap );
-}
-
-
-/* __gl_meshNewMesh() creates a new mesh with no edges, no vertices,
- * and no loops (what we usually call a "face").
- */
-GLUmesh *__gl_meshNewMesh( void )
-{
-  GLUvertex *v;
-  GLUface *f;
-  GLUhalfEdge *e;
-  GLUhalfEdge *eSym;
-  GLUmesh *mesh = (GLUmesh *)memAlloc( sizeof( GLUmesh ));
-  if (mesh == NULL) {
-     return NULL;
-  }
-  
-  v = &mesh->vHead;
-  f = &mesh->fHead;
-  e = &mesh->eHead;
-  eSym = &mesh->eHeadSym;
-
-  v->next = v->prev = v;
-  v->anEdge = NULL;
-  v->data = NULL;
-
-  f->next = f->prev = f;
-  f->anEdge = NULL;
-  f->data = NULL;
-  f->trail = NULL;
-  f->marked = FALSE;
-  f->inside = FALSE;
-
-  e->next = e;
-  e->Sym = eSym;
-  e->Onext = NULL;
-  e->Lnext = NULL;
-  e->Org = NULL;
-  e->Lface = NULL;
-  e->winding = 0;
-  e->activeRegion = NULL;
-
-  eSym->next = eSym;
-  eSym->Sym = e;
-  eSym->Onext = NULL;
-  eSym->Lnext = NULL;
-  eSym->Org = NULL;
-  eSym->Lface = NULL;
-  eSym->winding = 0;
-  eSym->activeRegion = NULL;
-
-  return mesh;
-}
-
-
-/* __gl_meshUnion( mesh1, mesh2 ) forms the union of all structures in
- * both meshes, and returns the new mesh (the old meshes are destroyed).
- */
-GLUmesh *__gl_meshUnion( GLUmesh *mesh1, GLUmesh *mesh2 )
-{
-  GLUface *f1 = &mesh1->fHead;
-  GLUvertex *v1 = &mesh1->vHead;
-  GLUhalfEdge *e1 = &mesh1->eHead;
-  GLUface *f2 = &mesh2->fHead;
-  GLUvertex *v2 = &mesh2->vHead;
-  GLUhalfEdge *e2 = &mesh2->eHead;
-
-  /* Add the faces, vertices, and edges of mesh2 to those of mesh1 */
-  if( f2->next != f2 ) {
-    f1->prev->next = f2->next;
-    f2->next->prev = f1->prev;
-    f2->prev->next = f1;
-    f1->prev = f2->prev;
-  }
-
-  if( v2->next != v2 ) {
-    v1->prev->next = v2->next;
-    v2->next->prev = v1->prev;
-    v2->prev->next = v1;
-    v1->prev = v2->prev;
-  }
-
-  if( e2->next != e2 ) {
-    e1->Sym->next->Sym->next = e2->next;
-    e2->next->Sym->next = e1->Sym->next;
-    e2->Sym->next->Sym->next = e1;
-    e1->Sym->next = e2->Sym->next;
-  }
-
-  memFree( mesh2 );
-  return mesh1;
-}
-
-
-#ifdef DELETE_BY_ZAPPING
-
-/* __gl_meshDeleteMesh( mesh ) will free all storage for any valid mesh.
- */
-void __gl_meshDeleteMesh( GLUmesh *mesh )
-{
-  GLUface *fHead = &mesh->fHead;
-
-  while( fHead->next != fHead ) {
-    __gl_meshZapFace( fHead->next );
-  }
-  assert( mesh->vHead.next == &mesh->vHead );
-
-  memFree( mesh );
-}
-
-#else
-
-/* __gl_meshDeleteMesh( mesh ) will free all storage for any valid mesh.
- */
-void __gl_meshDeleteMesh( GLUmesh *mesh )
-{
-  GLUface *f, *fNext;
-  GLUvertex *v, *vNext;
-  GLUhalfEdge *e, *eNext;
-
-  for( f = mesh->fHead.next; f != &mesh->fHead; f = fNext ) {
-    fNext = f->next;
-    memFree( f );
-  }
-
-  for( v = mesh->vHead.next; v != &mesh->vHead; v = vNext ) {
-    vNext = v->next;
-    memFree( v );
-  }
-
-  for( e = mesh->eHead.next; e != &mesh->eHead; e = eNext ) {
-    /* One call frees both e and e->Sym (see EdgePair above) */
-    eNext = e->next;
-    memFree( e );
-  }
-
-  memFree( mesh );
-}
-
-#endif
-
-#ifndef NDEBUG
-
-/* __gl_meshCheckMesh( mesh ) checks a mesh for self-consistency.
- */
-void __gl_meshCheckMesh( GLUmesh *mesh )
-{
-  GLUface *fHead = &mesh->fHead;
-  GLUvertex *vHead = &mesh->vHead;
-  GLUhalfEdge *eHead = &mesh->eHead;
-  GLUface *f, *fPrev;
-  GLUvertex *v, *vPrev;
-  GLUhalfEdge *e, *ePrev;
-
-  fPrev = fHead;
-  for( fPrev = fHead ; (f = fPrev->next) != fHead; fPrev = f) {
-    assert( f->prev == fPrev );
-    e = f->anEdge;
-    do {
-      assert( e->Sym != e );
-      assert( e->Sym->Sym == e );
-      assert( e->Lnext->Onext->Sym == e );
-      assert( e->Onext->Sym->Lnext == e );
-      assert( e->Lface == f );
-      e = e->Lnext;
-    } while( e != f->anEdge );
-  }
-  assert( f->prev == fPrev && f->anEdge == NULL && f->data == NULL );
-
-  vPrev = vHead;
-  for( vPrev = vHead ; (v = vPrev->next) != vHead; vPrev = v) {
-    assert( v->prev == vPrev );
-    e = v->anEdge;
-    do {
-      assert( e->Sym != e );
-      assert( e->Sym->Sym == e );
-      assert( e->Lnext->Onext->Sym == e );
-      assert( e->Onext->Sym->Lnext == e );
-      assert( e->Org == v );
-      e = e->Onext;
-    } while( e != v->anEdge );
-  }
-  assert( v->prev == vPrev && v->anEdge == NULL && v->data == NULL );
-
-  ePrev = eHead;
-  for( ePrev = eHead ; (e = ePrev->next) != eHead; ePrev = e) {
-    assert( e->Sym->next == ePrev->Sym );
-    assert( e->Sym != e );
-    assert( e->Sym->Sym == e );
-    assert( e->Org != NULL );
-    assert( e->Dst != NULL );
-    assert( e->Lnext->Onext->Sym == e );
-    assert( e->Onext->Sym->Lnext == e );
-  }
-  assert( e->Sym->next == ePrev->Sym
-       && e->Sym == &mesh->eHeadSym
-       && e->Sym->Sym == e
-       && e->Org == NULL && e->Dst == NULL
-       && e->Lface == NULL && e->Rface == NULL );
-}
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/mesh.h b/mesalib/src/glu/sgi/libtess/mesh.h
deleted file mode 100644
index 690c5f2f6..000000000
--- a/mesalib/src/glu/sgi/libtess/mesh.h
+++ /dev/null
@@ -1,266 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __mesh_h_
-#define __mesh_h_
-
-#include <GL/glu.h>
-
-typedef struct GLUmesh GLUmesh; 
-
-typedef struct GLUvertex GLUvertex;
-typedef struct GLUface GLUface;
-typedef struct GLUhalfEdge GLUhalfEdge;
-
-typedef struct ActiveRegion ActiveRegion;	/* Internal data */
-
-/* The mesh structure is similar in spirit, notation, and operations
- * to the "quad-edge" structure (see L. Guibas and J. Stolfi, Primitives
- * for the manipulation of general subdivisions and the computation of
- * Voronoi diagrams, ACM Transactions on Graphics, 4(2):74-123, April 1985).
- * For a simplified description, see the course notes for CS348a,
- * "Mathematical Foundations of Computer Graphics", available at the
- * Stanford bookstore (and taught during the fall quarter).
- * The implementation also borrows a tiny subset of the graph-based approach
- * use in Mantyla's Geometric Work Bench (see M. Mantyla, An Introduction
- * to Sold Modeling, Computer Science Press, Rockville, Maryland, 1988).
- *
- * The fundamental data structure is the "half-edge".  Two half-edges
- * go together to make an edge, but they point in opposite directions.
- * Each half-edge has a pointer to its mate (the "symmetric" half-edge Sym),
- * its origin vertex (Org), the face on its left side (Lface), and the
- * adjacent half-edges in the CCW direction around the origin vertex
- * (Onext) and around the left face (Lnext).  There is also a "next"
- * pointer for the global edge list (see below).
- *
- * The notation used for mesh navigation:
- *	Sym   = the mate of a half-edge (same edge, but opposite direction)
- *	Onext = edge CCW around origin vertex (keep same origin)
- *	Dnext = edge CCW around destination vertex (keep same dest)
- *	Lnext = edge CCW around left face (dest becomes new origin)
- *	Rnext = edge CCW around right face (origin becomes new dest)
- *
- * "prev" means to substitute CW for CCW in the definitions above.
- *
- * The mesh keeps global lists of all vertices, faces, and edges,
- * stored as doubly-linked circular lists with a dummy header node.
- * The mesh stores pointers to these dummy headers (vHead, fHead, eHead).
- *
- * The circular edge list is special; since half-edges always occur
- * in pairs (e and e->Sym), each half-edge stores a pointer in only
- * one direction.  Starting at eHead and following the e->next pointers
- * will visit each *edge* once (ie. e or e->Sym, but not both).
- * e->Sym stores a pointer in the opposite direction, thus it is
- * always true that e->Sym->next->Sym->next == e.
- *
- * Each vertex has a pointer to next and previous vertices in the
- * circular list, and a pointer to a half-edge with this vertex as
- * the origin (NULL if this is the dummy header).  There is also a
- * field "data" for client data.
- *
- * Each face has a pointer to the next and previous faces in the
- * circular list, and a pointer to a half-edge with this face as
- * the left face (NULL if this is the dummy header).  There is also
- * a field "data" for client data.
- *
- * Note that what we call a "face" is really a loop; faces may consist
- * of more than one loop (ie. not simply connected), but there is no
- * record of this in the data structure.  The mesh may consist of
- * several disconnected regions, so it may not be possible to visit
- * the entire mesh by starting at a half-edge and traversing the edge
- * structure.
- *
- * The mesh does NOT support isolated vertices; a vertex is deleted along
- * with its last edge.  Similarly when two faces are merged, one of the
- * faces is deleted (see __gl_meshDelete below).  For mesh operations,
- * all face (loop) and vertex pointers must not be NULL.  However, once
- * mesh manipulation is finished, __gl_MeshZapFace can be used to delete
- * faces of the mesh, one at a time.  All external faces can be "zapped"
- * before the mesh is returned to the client; then a NULL face indicates
- * a region which is not part of the output polygon.
- */
-
-struct GLUvertex {
-  GLUvertex	*next;		/* next vertex (never NULL) */
-  GLUvertex	*prev;		/* previous vertex (never NULL) */
-  GLUhalfEdge	*anEdge;	/* a half-edge with this origin */
-  void		*data;		/* client's data */
-
-  /* Internal data (keep hidden) */
-  GLdouble	coords[3];	/* vertex location in 3D */
-  GLdouble	s, t;		/* projection onto the sweep plane */
-  long		pqHandle;	/* to allow deletion from priority queue */
-};
-
-struct GLUface {
-  GLUface	*next;		/* next face (never NULL) */
-  GLUface	*prev;		/* previous face (never NULL) */
-  GLUhalfEdge	*anEdge;	/* a half edge with this left face */
-  void		*data;		/* room for client's data */
-
-  /* Internal data (keep hidden) */
-  GLUface	*trail;		/* "stack" for conversion to strips */
-  GLboolean	marked;		/* flag for conversion to strips */
-  GLboolean	inside;		/* this face is in the polygon interior */
-};
-
-struct GLUhalfEdge {
-  GLUhalfEdge	*next;		/* doubly-linked list (prev==Sym->next) */
-  GLUhalfEdge	*Sym;		/* same edge, opposite direction */
-  GLUhalfEdge	*Onext;		/* next edge CCW around origin */
-  GLUhalfEdge	*Lnext;		/* next edge CCW around left face */
-  GLUvertex	*Org;		/* origin vertex (Overtex too long) */
-  GLUface	*Lface;		/* left face */
-
-  /* Internal data (keep hidden) */
-  ActiveRegion	*activeRegion;	/* a region with this upper edge (sweep.c) */
-  int		winding;	/* change in winding number when crossing
-                                   from the right face to the left face */
-};
-
-#define	Rface	Sym->Lface
-#define Dst	Sym->Org
-
-#define Oprev	Sym->Lnext
-#define Lprev   Onext->Sym
-#define Dprev	Lnext->Sym
-#define Rprev	Sym->Onext
-#define Dnext	Rprev->Sym	/* 3 pointers */
-#define Rnext	Oprev->Sym	/* 3 pointers */
-
-
-struct GLUmesh {
-  GLUvertex	vHead;		/* dummy header for vertex list */
-  GLUface	fHead;		/* dummy header for face list */
-  GLUhalfEdge	eHead;		/* dummy header for edge list */
-  GLUhalfEdge	eHeadSym;	/* and its symmetric counterpart */
-};
-
-/* The mesh operations below have three motivations: completeness,
- * convenience, and efficiency.  The basic mesh operations are MakeEdge,
- * Splice, and Delete.  All the other edge operations can be implemented
- * in terms of these.  The other operations are provided for convenience
- * and/or efficiency.
- *
- * When a face is split or a vertex is added, they are inserted into the
- * global list *before* the existing vertex or face (ie. e->Org or e->Lface).
- * This makes it easier to process all vertices or faces in the global lists
- * without worrying about processing the same data twice.  As a convenience,
- * when a face is split, the "inside" flag is copied from the old face.
- * Other internal data (v->data, v->activeRegion, f->data, f->marked,
- * f->trail, e->winding) is set to zero.
- *
- * ********************** Basic Edge Operations **************************
- *
- * __gl_meshMakeEdge( mesh ) creates one edge, two vertices, and a loop.
- * The loop (face) consists of the two new half-edges.
- *
- * __gl_meshSplice( eOrg, eDst ) is the basic operation for changing the
- * mesh connectivity and topology.  It changes the mesh so that
- *	eOrg->Onext <- OLD( eDst->Onext )
- *	eDst->Onext <- OLD( eOrg->Onext )
- * where OLD(...) means the value before the meshSplice operation.
- *
- * This can have two effects on the vertex structure:
- *  - if eOrg->Org != eDst->Org, the two vertices are merged together
- *  - if eOrg->Org == eDst->Org, the origin is split into two vertices
- * In both cases, eDst->Org is changed and eOrg->Org is untouched.
- *
- * Similarly (and independently) for the face structure,
- *  - if eOrg->Lface == eDst->Lface, one loop is split into two
- *  - if eOrg->Lface != eDst->Lface, two distinct loops are joined into one
- * In both cases, eDst->Lface is changed and eOrg->Lface is unaffected.
- *
- * __gl_meshDelete( eDel ) removes the edge eDel.  There are several cases:
- * if (eDel->Lface != eDel->Rface), we join two loops into one; the loop
- * eDel->Lface is deleted.  Otherwise, we are splitting one loop into two;
- * the newly created loop will contain eDel->Dst.  If the deletion of eDel
- * would create isolated vertices, those are deleted as well.
- *
- * ********************** Other Edge Operations **************************
- *
- * __gl_meshAddEdgeVertex( eOrg ) creates a new edge eNew such that
- * eNew == eOrg->Lnext, and eNew->Dst is a newly created vertex.
- * eOrg and eNew will have the same left face.
- *
- * __gl_meshSplitEdge( eOrg ) splits eOrg into two edges eOrg and eNew,
- * such that eNew == eOrg->Lnext.  The new vertex is eOrg->Dst == eNew->Org.
- * eOrg and eNew will have the same left face.
- *
- * __gl_meshConnect( eOrg, eDst ) creates a new edge from eOrg->Dst
- * to eDst->Org, and returns the corresponding half-edge eNew.
- * If eOrg->Lface == eDst->Lface, this splits one loop into two,
- * and the newly created loop is eNew->Lface.  Otherwise, two disjoint
- * loops are merged into one, and the loop eDst->Lface is destroyed.
- *
- * ************************ Other Operations *****************************
- *
- * __gl_meshNewMesh() creates a new mesh with no edges, no vertices,
- * and no loops (what we usually call a "face").
- *
- * __gl_meshUnion( mesh1, mesh2 ) forms the union of all structures in
- * both meshes, and returns the new mesh (the old meshes are destroyed).
- *
- * __gl_meshDeleteMesh( mesh ) will free all storage for any valid mesh.
- *
- * __gl_meshZapFace( fZap ) destroys a face and removes it from the
- * global face list.  All edges of fZap will have a NULL pointer as their
- * left face.  Any edges which also have a NULL pointer as their right face
- * are deleted entirely (along with any isolated vertices this produces).
- * An entire mesh can be deleted by zapping its faces, one at a time,
- * in any order.  Zapped faces cannot be used in further mesh operations!
- *
- * __gl_meshCheckMesh( mesh ) checks a mesh for self-consistency.
- */
-
-GLUhalfEdge	*__gl_meshMakeEdge( GLUmesh *mesh );
-int		__gl_meshSplice( GLUhalfEdge *eOrg, GLUhalfEdge *eDst );
-int		__gl_meshDelete( GLUhalfEdge *eDel );
-
-GLUhalfEdge	*__gl_meshAddEdgeVertex( GLUhalfEdge *eOrg );
-GLUhalfEdge	*__gl_meshSplitEdge( GLUhalfEdge *eOrg );
-GLUhalfEdge	*__gl_meshConnect( GLUhalfEdge *eOrg, GLUhalfEdge *eDst );
-
-GLUmesh		*__gl_meshNewMesh( void );
-GLUmesh		*__gl_meshUnion( GLUmesh *mesh1, GLUmesh *mesh2 );
-void		__gl_meshDeleteMesh( GLUmesh *mesh );
-void		__gl_meshZapFace( GLUface *fZap );
-
-#ifdef NDEBUG
-#define		__gl_meshCheckMesh( mesh )
-#else
-void		__gl_meshCheckMesh( GLUmesh *mesh );
-#endif
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/normal.c b/mesalib/src/glu/sgi/libtess/normal.c
deleted file mode 100644
index 9a3bd43d3..000000000
--- a/mesalib/src/glu/sgi/libtess/normal.c
+++ /dev/null
@@ -1,257 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#include "gluos.h"
-#include "mesh.h"
-#include "tess.h"
-#include "normal.h"
-#include <math.h>
-#include <assert.h>
-
-#ifndef TRUE
-#define TRUE 1
-#endif
-#ifndef FALSE
-#define FALSE 0
-#endif
-
-#define Dot(u,v)	(u[0]*v[0] + u[1]*v[1] + u[2]*v[2])
-
-#if 0
-static void Normalize( GLdouble v[3] )
-{
-  GLdouble len = v[0]*v[0] + v[1]*v[1] + v[2]*v[2];
-
-  assert( len > 0 );
-  len = sqrt( len );
-  v[0] /= len;
-  v[1] /= len;
-  v[2] /= len;
-}
-#endif
-
-#undef	ABS
-#define ABS(x)	((x) < 0 ? -(x) : (x))
-
-static int LongAxis( GLdouble v[3] )
-{
-  int i = 0;
-
-  if( ABS(v[1]) > ABS(v[0]) ) { i = 1; }
-  if( ABS(v[2]) > ABS(v[i]) ) { i = 2; }
-  return i;
-}
-
-static void ComputeNormal( GLUtesselator *tess, GLdouble norm[3] )
-{
-  GLUvertex *v, *v1, *v2;
-  GLdouble c, tLen2, maxLen2;
-  GLdouble maxVal[3], minVal[3], d1[3], d2[3], tNorm[3];
-  GLUvertex *maxVert[3], *minVert[3];
-  GLUvertex *vHead = &tess->mesh->vHead;
-  int i;
-
-  maxVal[0] = maxVal[1] = maxVal[2] = -2 * GLU_TESS_MAX_COORD;
-  minVal[0] = minVal[1] = minVal[2] = 2 * GLU_TESS_MAX_COORD;
-
-  for( v = vHead->next; v != vHead; v = v->next ) {
-    for( i = 0; i < 3; ++i ) {
-      c = v->coords[i];
-      if( c < minVal[i] ) { minVal[i] = c; minVert[i] = v; }
-      if( c > maxVal[i] ) { maxVal[i] = c; maxVert[i] = v; }
-    }
-  }
-
-  /* Find two vertices separated by at least 1/sqrt(3) of the maximum
-   * distance between any two vertices
-   */
-  i = 0;
-  if( maxVal[1] - minVal[1] > maxVal[0] - minVal[0] ) { i = 1; }
-  if( maxVal[2] - minVal[2] > maxVal[i] - minVal[i] ) { i = 2; }
-  if( minVal[i] >= maxVal[i] ) {
-    /* All vertices are the same -- normal doesn't matter */
-    norm[0] = 0; norm[1] = 0; norm[2] = 1;
-    return;
-  }
-
-  /* Look for a third vertex which forms the triangle with maximum area
-   * (Length of normal == twice the triangle area)
-   */
-  maxLen2 = 0;
-  v1 = minVert[i];
-  v2 = maxVert[i];
-  d1[0] = v1->coords[0] - v2->coords[0];
-  d1[1] = v1->coords[1] - v2->coords[1];
-  d1[2] = v1->coords[2] - v2->coords[2];
-  for( v = vHead->next; v != vHead; v = v->next ) {
-    d2[0] = v->coords[0] - v2->coords[0];
-    d2[1] = v->coords[1] - v2->coords[1];
-    d2[2] = v->coords[2] - v2->coords[2];
-    tNorm[0] = d1[1]*d2[2] - d1[2]*d2[1];
-    tNorm[1] = d1[2]*d2[0] - d1[0]*d2[2];
-    tNorm[2] = d1[0]*d2[1] - d1[1]*d2[0];
-    tLen2 = tNorm[0]*tNorm[0] + tNorm[1]*tNorm[1] + tNorm[2]*tNorm[2];
-    if( tLen2 > maxLen2 ) {
-      maxLen2 = tLen2;
-      norm[0] = tNorm[0];
-      norm[1] = tNorm[1];
-      norm[2] = tNorm[2];
-    }
-  }
-
-  if( maxLen2 <= 0 ) {
-    /* All points lie on a single line -- any decent normal will do */
-    norm[0] = norm[1] = norm[2] = 0;
-    norm[LongAxis(d1)] = 1;
-  }
-}
-
-
-static void CheckOrientation( GLUtesselator *tess )
-{
-  GLdouble area;
-  GLUface *f, *fHead = &tess->mesh->fHead;
-  GLUvertex *v, *vHead = &tess->mesh->vHead;
-  GLUhalfEdge *e;
-
-  /* When we compute the normal automatically, we choose the orientation
-   * so that the sum of the signed areas of all contours is non-negative.
-   */
-  area = 0;
-  for( f = fHead->next; f != fHead; f = f->next ) {
-    e = f->anEdge;
-    if( e->winding <= 0 ) continue;
-    do {
-      area += (e->Org->s - e->Dst->s) * (e->Org->t + e->Dst->t);
-      e = e->Lnext;
-    } while( e != f->anEdge );
-  }
-  if( area < 0 ) {
-    /* Reverse the orientation by flipping all the t-coordinates */
-    for( v = vHead->next; v != vHead; v = v->next ) {
-      v->t = - v->t;
-    }
-    tess->tUnit[0] = - tess->tUnit[0];
-    tess->tUnit[1] = - tess->tUnit[1];
-    tess->tUnit[2] = - tess->tUnit[2];
-  }
-}
-
-#ifdef FOR_TRITE_TEST_PROGRAM
-#include <stdlib.h>
-extern int RandomSweep;
-#define S_UNIT_X	(RandomSweep ? (2*drand48()-1) : 1.0)
-#define S_UNIT_Y	(RandomSweep ? (2*drand48()-1) : 0.0)
-#else
-#if defined(SLANTED_SWEEP)
-/* The "feature merging" is not intended to be complete.  There are
- * special cases where edges are nearly parallel to the sweep line
- * which are not implemented.  The algorithm should still behave
- * robustly (ie. produce a reasonable tesselation) in the presence
- * of such edges, however it may miss features which could have been
- * merged.  We could minimize this effect by choosing the sweep line
- * direction to be something unusual (ie. not parallel to one of the
- * coordinate axes).
- */
-#define S_UNIT_X	0.50941539564955385	/* Pre-normalized */
-#define S_UNIT_Y	0.86052074622010633
-#else
-#define S_UNIT_X	1.0
-#define S_UNIT_Y	0.0
-#endif
-#endif
-
-/* Determine the polygon normal and project vertices onto the plane
- * of the polygon.
- */
-void __gl_projectPolygon( GLUtesselator *tess )
-{
-  GLUvertex *v, *vHead = &tess->mesh->vHead;
-  GLdouble norm[3];
-  GLdouble *sUnit, *tUnit;
-  int i, computedNormal = FALSE;
-
-  norm[0] = tess->normal[0];
-  norm[1] = tess->normal[1];
-  norm[2] = tess->normal[2];
-  if( norm[0] == 0 && norm[1] == 0 && norm[2] == 0 ) {
-    ComputeNormal( tess, norm );
-    computedNormal = TRUE;
-  }
-  sUnit = tess->sUnit;
-  tUnit = tess->tUnit;
-  i = LongAxis( norm );
-
-#if defined(FOR_TRITE_TEST_PROGRAM) || defined(TRUE_PROJECT)
-  /* Choose the initial sUnit vector to be approximately perpendicular
-   * to the normal.
-   */
-  Normalize( norm );
-
-  sUnit[i] = 0;
-  sUnit[(i+1)%3] = S_UNIT_X;
-  sUnit[(i+2)%3] = S_UNIT_Y;
-
-  /* Now make it exactly perpendicular */
-  w = Dot( sUnit, norm );
-  sUnit[0] -= w * norm[0];
-  sUnit[1] -= w * norm[1];
-  sUnit[2] -= w * norm[2];
-  Normalize( sUnit );
-
-  /* Choose tUnit so that (sUnit,tUnit,norm) form a right-handed frame */
-  tUnit[0] = norm[1]*sUnit[2] - norm[2]*sUnit[1];
-  tUnit[1] = norm[2]*sUnit[0] - norm[0]*sUnit[2];
-  tUnit[2] = norm[0]*sUnit[1] - norm[1]*sUnit[0];
-  Normalize( tUnit );
-#else
-  /* Project perpendicular to a coordinate axis -- better numerically */
-  sUnit[i] = 0;
-  sUnit[(i+1)%3] = S_UNIT_X;
-  sUnit[(i+2)%3] = S_UNIT_Y;
-
-  tUnit[i] = 0;
-  tUnit[(i+1)%3] = (norm[i] > 0) ? -S_UNIT_Y : S_UNIT_Y;
-  tUnit[(i+2)%3] = (norm[i] > 0) ? S_UNIT_X : -S_UNIT_X;
-#endif
-
-  /* Project the vertices onto the sweep plane */
-  for( v = vHead->next; v != vHead; v = v->next ) {
-    v->s = Dot( v->coords, sUnit );
-    v->t = Dot( v->coords, tUnit );
-  }
-  if( computedNormal ) {
-    CheckOrientation( tess );
-  }
-}
diff --git a/mesalib/src/glu/sgi/libtess/normal.h b/mesalib/src/glu/sgi/libtess/normal.h
deleted file mode 100644
index c376ca445..000000000
--- a/mesalib/src/glu/sgi/libtess/normal.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __normal_h_
-#define __normal_h_
-
-#include "tess.h"
-
-/* __gl_projectPolygon( tess ) determines the polygon normal
- * and project vertices onto the plane of the polygon.
- */
-void __gl_projectPolygon( GLUtesselator *tess );
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/priorityq-heap.c b/mesalib/src/glu/sgi/libtess/priorityq-heap.c
deleted file mode 100644
index 52698b59c..000000000
--- a/mesalib/src/glu/sgi/libtess/priorityq-heap.c
+++ /dev/null
@@ -1,256 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#include <stddef.h>
-#include <assert.h>
-#include "priorityq-heap.h"
-#include "memalloc.h"
-
-#define INIT_SIZE	32
-
-#ifndef TRUE
-#define TRUE 1
-#endif
-#ifndef FALSE
-#define FALSE 0
-#endif
-
-#ifdef FOR_TRITE_TEST_PROGRAM
-#define LEQ(x,y)	(*pq->leq)(x,y)
-#else
-/* Violates modularity, but a little faster */
-#include "geom.h"
-#define LEQ(x,y)	VertLeq((GLUvertex *)x, (GLUvertex *)y)
-#endif
-
-/* really __gl_pqHeapNewPriorityQ */
-PriorityQ *pqNewPriorityQ( int (*leq)(PQkey key1, PQkey key2) )
-{
-  PriorityQ *pq = (PriorityQ *)memAlloc( sizeof( PriorityQ ));
-  if (pq == NULL) return NULL;
-
-  pq->size = 0;
-  pq->max = INIT_SIZE;
-  pq->nodes = (PQnode *)memAlloc( (INIT_SIZE + 1) * sizeof(pq->nodes[0]) );
-  if (pq->nodes == NULL) {
-     memFree(pq);
-     return NULL;
-  }
-
-  pq->handles = (PQhandleElem *)memAlloc( (INIT_SIZE + 1) * sizeof(pq->handles[0]) );
-  if (pq->handles == NULL) {
-     memFree(pq->nodes);
-     memFree(pq);
-     return NULL;
-  }
-
-  pq->initialized = FALSE;
-  pq->freeList = 0;
-  pq->leq = leq;
-
-  pq->nodes[1].handle = 1;	/* so that Minimum() returns NULL */
-  pq->handles[1].key = NULL;
-  return pq;
-}
-
-/* really __gl_pqHeapDeletePriorityQ */
-void pqDeletePriorityQ( PriorityQ *pq )
-{
-  memFree( pq->handles );
-  memFree( pq->nodes );
-  memFree( pq );
-}
-
-
-static void FloatDown( PriorityQ *pq, long curr )
-{
-  PQnode *n = pq->nodes;
-  PQhandleElem *h = pq->handles;
-  PQhandle hCurr, hChild;
-  long child;
-
-  hCurr = n[curr].handle;
-  for( ;; ) {
-    child = curr << 1;
-    if( child < pq->size && LEQ( h[n[child+1].handle].key,
-				 h[n[child].handle].key )) {
-      ++child;
-    }
-
-    assert(child <= pq->max);
-
-    hChild = n[child].handle;
-    if( child > pq->size || LEQ( h[hCurr].key, h[hChild].key )) {
-      n[curr].handle = hCurr;
-      h[hCurr].node = curr;
-      break;
-    }
-    n[curr].handle = hChild;
-    h[hChild].node = curr;
-    curr = child;
-  }
-}
-
-
-static void FloatUp( PriorityQ *pq, long curr )
-{
-  PQnode *n = pq->nodes;
-  PQhandleElem *h = pq->handles;
-  PQhandle hCurr, hParent;
-  long parent;
-
-  hCurr = n[curr].handle;
-  for( ;; ) {
-    parent = curr >> 1;
-    hParent = n[parent].handle;
-    if( parent == 0 || LEQ( h[hParent].key, h[hCurr].key )) {
-      n[curr].handle = hCurr;
-      h[hCurr].node = curr;
-      break;
-    }
-    n[curr].handle = hParent;
-    h[hParent].node = curr;
-    curr = parent;
-  }
-}
-
-/* really __gl_pqHeapInit */
-void pqInit( PriorityQ *pq )
-{
-  long i;
-
-  /* This method of building a heap is O(n), rather than O(n lg n). */
-
-  for( i = pq->size; i >= 1; --i ) {
-    FloatDown( pq, i );
-  }
-  pq->initialized = TRUE;
-}
-
-/* really __gl_pqHeapInsert */
-/* returns LONG_MAX iff out of memory */
-PQhandle pqInsert( PriorityQ *pq, PQkey keyNew )
-{
-  long curr;
-  PQhandle free_handle;
-
-  curr = ++ pq->size;
-  if( (curr*2) > pq->max ) {
-    PQnode *saveNodes= pq->nodes;
-    PQhandleElem *saveHandles= pq->handles;
-
-    /* If the heap overflows, double its size. */
-    pq->max <<= 1;
-    pq->nodes = (PQnode *)memRealloc( pq->nodes, 
-				     (size_t) 
-				     ((pq->max + 1) * sizeof( pq->nodes[0] )));
-    if (pq->nodes == NULL) {
-       pq->nodes = saveNodes;	/* restore ptr to free upon return */
-       return LONG_MAX;
-    }
-    pq->handles = (PQhandleElem *)memRealloc( pq->handles,
-			                     (size_t)
-			                      ((pq->max + 1) * 
-					       sizeof( pq->handles[0] )));
-    if (pq->handles == NULL) {
-       pq->handles = saveHandles; /* restore ptr to free upon return */
-       return LONG_MAX;
-    }
-  }
-
-  if( pq->freeList == 0 ) {
-    free_handle = curr;
-  } else {
-    free_handle = pq->freeList;
-    pq->freeList = pq->handles[free_handle].node;
-  }
-
-  pq->nodes[curr].handle = free_handle;
-  pq->handles[free_handle].node = curr;
-  pq->handles[free_handle].key = keyNew;
-
-  if( pq->initialized ) {
-    FloatUp( pq, curr );
-  }
-  assert(free_handle != LONG_MAX);
-  return free_handle;
-}
-
-/* really __gl_pqHeapExtractMin */
-PQkey pqExtractMin( PriorityQ *pq )
-{
-  PQnode *n = pq->nodes;
-  PQhandleElem *h = pq->handles;
-  PQhandle hMin = n[1].handle;
-  PQkey min = h[hMin].key;
-
-  if( pq->size > 0 ) {
-    n[1].handle = n[pq->size].handle;
-    h[n[1].handle].node = 1;
-
-    h[hMin].key = NULL;
-    h[hMin].node = pq->freeList;
-    pq->freeList = hMin;
-
-    if( -- pq->size > 0 ) {
-      FloatDown( pq, 1 );
-    }
-  }
-  return min;
-}
-
-/* really __gl_pqHeapDelete */
-void pqDelete( PriorityQ *pq, PQhandle hCurr )
-{
-  PQnode *n = pq->nodes;
-  PQhandleElem *h = pq->handles;
-  long curr;
-
-  assert( hCurr >= 1 && hCurr <= pq->max && h[hCurr].key != NULL );
-
-  curr = h[hCurr].node;
-  n[curr].handle = n[pq->size].handle;
-  h[n[curr].handle].node = curr;
-
-  if( curr <= -- pq->size ) {
-    if( curr <= 1 || LEQ( h[n[curr>>1].handle].key, h[n[curr].handle].key )) {
-      FloatDown( pq, curr );
-    } else {
-      FloatUp( pq, curr );
-    }
-  }
-  h[hCurr].key = NULL;
-  h[hCurr].node = pq->freeList;
-  pq->freeList = hCurr;
-}
diff --git a/mesalib/src/glu/sgi/libtess/priorityq-heap.h b/mesalib/src/glu/sgi/libtess/priorityq-heap.h
deleted file mode 100644
index dc9aaef87..000000000
--- a/mesalib/src/glu/sgi/libtess/priorityq-heap.h
+++ /dev/null
@@ -1,107 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __priorityq_heap_h_
-#define __priorityq_heap_h_
-
-/* Use #define's so that another heap implementation can use this one */
-
-#define PQkey			PQHeapKey
-#define PQhandle		PQHeapHandle
-#define PriorityQ		PriorityQHeap
-
-#define pqNewPriorityQ(leq)	__gl_pqHeapNewPriorityQ(leq)
-#define pqDeletePriorityQ(pq)	__gl_pqHeapDeletePriorityQ(pq)
-
-/* The basic operations are insertion of a new key (pqInsert),
- * and examination/extraction of a key whose value is minimum
- * (pqMinimum/pqExtractMin).  Deletion is also allowed (pqDelete);
- * for this purpose pqInsert returns a "handle" which is supplied
- * as the argument.
- *
- * An initial heap may be created efficiently by calling pqInsert
- * repeatedly, then calling pqInit.  In any case pqInit must be called
- * before any operations other than pqInsert are used.
- *
- * If the heap is empty, pqMinimum/pqExtractMin will return a NULL key.
- * This may also be tested with pqIsEmpty.
- */
-#define pqInit(pq)		__gl_pqHeapInit(pq)
-#define pqInsert(pq,key)	__gl_pqHeapInsert(pq,key)
-#define pqMinimum(pq)		__gl_pqHeapMinimum(pq)
-#define pqExtractMin(pq)	__gl_pqHeapExtractMin(pq)
-#define pqDelete(pq,handle)	__gl_pqHeapDelete(pq,handle)
-#define pqIsEmpty(pq)		__gl_pqHeapIsEmpty(pq)
-
-
-/* Since we support deletion the data structure is a little more
- * complicated than an ordinary heap.  "nodes" is the heap itself;
- * active nodes are stored in the range 1..pq->size.  When the
- * heap exceeds its allocated size (pq->max), its size doubles.
- * The children of node i are nodes 2i and 2i+1.
- *
- * Each node stores an index into an array "handles".  Each handle
- * stores a key, plus a pointer back to the node which currently
- * represents that key (ie. nodes[handles[i].node].handle == i).
- */
-
-typedef void *PQkey;
-typedef long PQhandle;
-typedef struct PriorityQ PriorityQ;
-
-typedef struct { PQhandle handle; } PQnode;
-typedef struct { PQkey key; PQhandle node; } PQhandleElem;
-
-struct PriorityQ {
-  PQnode	*nodes;
-  PQhandleElem	*handles;
-  long		size, max;
-  PQhandle	freeList;
-  int		initialized;
-  int		(*leq)(PQkey key1, PQkey key2);
-};
-  
-PriorityQ	*pqNewPriorityQ( int (*leq)(PQkey key1, PQkey key2) );
-void		pqDeletePriorityQ( PriorityQ *pq );
-
-void		pqInit( PriorityQ *pq );
-PQhandle	pqInsert( PriorityQ *pq, PQkey key );
-PQkey		pqExtractMin( PriorityQ *pq );
-void		pqDelete( PriorityQ *pq, PQhandle handle );
-
-
-#define __gl_pqHeapMinimum(pq)	((pq)->handles[(pq)->nodes[1].handle].key)
-#define __gl_pqHeapIsEmpty(pq)	((pq)->size == 0)
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/priorityq-sort.h b/mesalib/src/glu/sgi/libtess/priorityq-sort.h
deleted file mode 100644
index 746cf5fa6..000000000
--- a/mesalib/src/glu/sgi/libtess/priorityq-sort.h
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __priorityq_sort_h_
-#define __priorityq_sort_h_
-
-#include "priorityq-heap.h"
-
-#undef PQkey
-#undef PQhandle
-#undef PriorityQ
-#undef pqNewPriorityQ
-#undef pqDeletePriorityQ
-#undef pqInit
-#undef pqInsert
-#undef pqMinimum
-#undef pqExtractMin
-#undef pqDelete
-#undef pqIsEmpty
-
-/* Use #define's so that another heap implementation can use this one */
-
-#define PQkey			PQSortKey
-#define PQhandle		PQSortHandle
-#define PriorityQ		PriorityQSort
-
-#define pqNewPriorityQ(leq)	__gl_pqSortNewPriorityQ(leq)
-#define pqDeletePriorityQ(pq)	__gl_pqSortDeletePriorityQ(pq)
-
-/* The basic operations are insertion of a new key (pqInsert),
- * and examination/extraction of a key whose value is minimum
- * (pqMinimum/pqExtractMin).  Deletion is also allowed (pqDelete);
- * for this purpose pqInsert returns a "handle" which is supplied
- * as the argument.
- *
- * An initial heap may be created efficiently by calling pqInsert
- * repeatedly, then calling pqInit.  In any case pqInit must be called
- * before any operations other than pqInsert are used.
- *
- * If the heap is empty, pqMinimum/pqExtractMin will return a NULL key.
- * This may also be tested with pqIsEmpty.
- */
-#define pqInit(pq)		__gl_pqSortInit(pq)
-#define pqInsert(pq,key)	__gl_pqSortInsert(pq,key)
-#define pqMinimum(pq)		__gl_pqSortMinimum(pq)
-#define pqExtractMin(pq)	__gl_pqSortExtractMin(pq)
-#define pqDelete(pq,handle)	__gl_pqSortDelete(pq,handle)
-#define pqIsEmpty(pq)		__gl_pqSortIsEmpty(pq)
-
-
-/* Since we support deletion the data structure is a little more
- * complicated than an ordinary heap.  "nodes" is the heap itself;
- * active nodes are stored in the range 1..pq->size.  When the
- * heap exceeds its allocated size (pq->max), its size doubles.
- * The children of node i are nodes 2i and 2i+1.
- *
- * Each node stores an index into an array "handles".  Each handle
- * stores a key, plus a pointer back to the node which currently
- * represents that key (ie. nodes[handles[i].node].handle == i).
- */
-
-typedef PQHeapKey PQkey;
-typedef PQHeapHandle PQhandle;
-typedef struct PriorityQ PriorityQ;
-
-struct PriorityQ {
-  PriorityQHeap	*heap;
-  PQkey		*keys;
-  PQkey		**order;
-  PQhandle	size, max;
-  int		initialized;
-  int		(*leq)(PQkey key1, PQkey key2);
-};
-  
-PriorityQ	*pqNewPriorityQ( int (*leq)(PQkey key1, PQkey key2) );
-void		pqDeletePriorityQ( PriorityQ *pq );
-
-int		pqInit( PriorityQ *pq );
-PQhandle	pqInsert( PriorityQ *pq, PQkey key );
-PQkey		pqExtractMin( PriorityQ *pq );
-void		pqDelete( PriorityQ *pq, PQhandle handle );
-
-PQkey		pqMinimum( PriorityQ *pq );
-int		pqIsEmpty( PriorityQ *pq );
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/priorityq.c b/mesalib/src/glu/sgi/libtess/priorityq.c
deleted file mode 100644
index c6b99cce5..000000000
--- a/mesalib/src/glu/sgi/libtess/priorityq.c
+++ /dev/null
@@ -1,260 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#include "gluos.h"
-#include <stddef.h>
-#include <assert.h>
-#include <limits.h>		/* LONG_MAX */
-#include "memalloc.h"
-
-/* Include all the code for the regular heap-based queue here. */
-
-#include "priorityq-heap.c"
-
-/* Now redefine all the function names to map to their "Sort" versions. */
-
-#include "priorityq-sort.h"
-
-/* really __gl_pqSortNewPriorityQ */
-PriorityQ *pqNewPriorityQ( int (*leq)(PQkey key1, PQkey key2) )
-{
-  PriorityQ *pq = (PriorityQ *)memAlloc( sizeof( PriorityQ ));
-  if (pq == NULL) return NULL;
-
-  pq->heap = __gl_pqHeapNewPriorityQ( leq );
-  if (pq->heap == NULL) {
-     memFree(pq);
-     return NULL;
-  }
-
-  pq->keys = (PQHeapKey *)memAlloc( INIT_SIZE * sizeof(pq->keys[0]) );
-  if (pq->keys == NULL) {
-     __gl_pqHeapDeletePriorityQ(pq->heap);
-     memFree(pq);
-     return NULL;
-  }
-
-  pq->size = 0;
-  pq->max = INIT_SIZE;
-  pq->initialized = FALSE;
-  pq->leq = leq;
-  return pq;
-}
-
-/* really __gl_pqSortDeletePriorityQ */
-void pqDeletePriorityQ( PriorityQ *pq )
-{
-  assert(pq != NULL); 
-  if (pq->heap != NULL) __gl_pqHeapDeletePriorityQ( pq->heap );
-  if (pq->order != NULL) memFree( pq->order );
-  if (pq->keys != NULL) memFree( pq->keys );
-  memFree( pq );
-}
-
-
-#define LT(x,y)		(! LEQ(y,x))
-#define GT(x,y)		(! LEQ(x,y))
-#define Swap(a,b)	do{PQkey *tmp = *a; *a = *b; *b = tmp;}while(0)
-
-/* really __gl_pqSortInit */
-int pqInit( PriorityQ *pq )
-{
-  PQkey **p, **r, **i, **j, *piv;
-  struct { PQkey **p, **r; } Stack[50], *top = Stack;
-  unsigned long seed = 2016473283;
-
-  /* Create an array of indirect pointers to the keys, so that we
-   * the handles we have returned are still valid.
-   */
-/*
-  pq->order = (PQHeapKey **)memAlloc( (size_t)
-                                  (pq->size * sizeof(pq->order[0])) );
-*/
-  pq->order = (PQHeapKey **)memAlloc( (size_t)
-                                  ((pq->size+1) * sizeof(pq->order[0])) );
-/* the previous line is a patch to compensate for the fact that IBM */
-/* machines return a null on a malloc of zero bytes (unlike SGI),   */
-/* so we have to put in this defense to guard against a memory      */
-/* fault four lines down. from fossum@austin.ibm.com.               */
-  if (pq->order == NULL) return 0;
-
-  p = pq->order;
-  r = p + pq->size - 1;
-  for( piv = pq->keys, i = p; i <= r; ++piv, ++i ) {
-    *i = piv;
-  }
-
-  /* Sort the indirect pointers in descending order,
-   * using randomized Quicksort
-   */
-  top->p = p; top->r = r; ++top;
-  while( --top >= Stack ) {
-    p = top->p;
-    r = top->r;
-    while( r > p + 10 ) {
-      seed = seed * 1539415821 + 1;
-      i = p + seed % (r - p + 1);
-      piv = *i;
-      *i = *p;
-      *p = piv;
-      i = p - 1;
-      j = r + 1;
-      do {
-	do { ++i; } while( GT( **i, *piv ));
-	do { --j; } while( LT( **j, *piv ));
-	Swap( i, j );
-      } while( i < j );
-      Swap( i, j );	/* Undo last swap */
-      if( i - p < r - j ) {
-	top->p = j+1; top->r = r; ++top;
-	r = i-1;
-      } else {
-	top->p = p; top->r = i-1; ++top;
-	p = j+1;
-      }
-    }
-    /* Insertion sort small lists */
-    for( i = p+1; i <= r; ++i ) {
-      piv = *i;
-      for( j = i; j > p && LT( **(j-1), *piv ); --j ) {
-	*j = *(j-1);
-      }
-      *j = piv;
-    }
-  }
-  pq->max = pq->size;
-  pq->initialized = TRUE;
-  __gl_pqHeapInit( pq->heap );	/* always succeeds */
-
-#ifndef NDEBUG
-  p = pq->order;
-  r = p + pq->size - 1;
-  for( i = p; i < r; ++i ) {
-    assert( LEQ( **(i+1), **i ));
-  }
-#endif
-
-  return 1;
-}
-
-/* really __gl_pqSortInsert */
-/* returns LONG_MAX iff out of memory */ 
-PQhandle pqInsert( PriorityQ *pq, PQkey keyNew )
-{
-  long curr;
-
-  if( pq->initialized ) {
-    return __gl_pqHeapInsert( pq->heap, keyNew );
-  }
-  curr = pq->size;
-  if( ++ pq->size >= pq->max ) {
-    PQkey *saveKey= pq->keys;
-
-    /* If the heap overflows, double its size. */
-    pq->max <<= 1;
-    pq->keys = (PQHeapKey *)memRealloc( pq->keys, 
-	 	                        (size_t)
-	                                 (pq->max * sizeof( pq->keys[0] )));
-    if (pq->keys == NULL) {	
-       pq->keys = saveKey;	/* restore ptr to free upon return */
-       return LONG_MAX;
-    }
-  }
-  assert(curr != LONG_MAX);	
-  pq->keys[curr] = keyNew;
-
-  /* Negative handles index the sorted array. */
-  return -(curr+1);
-}
-
-/* really __gl_pqSortExtractMin */
-PQkey pqExtractMin( PriorityQ *pq )
-{
-  PQkey sortMin, heapMin;
-
-  if( pq->size == 0 ) {
-    return __gl_pqHeapExtractMin( pq->heap );
-  }
-  sortMin = *(pq->order[pq->size-1]);
-  if( ! __gl_pqHeapIsEmpty( pq->heap )) {
-    heapMin = __gl_pqHeapMinimum( pq->heap );
-    if( LEQ( heapMin, sortMin )) {
-      return __gl_pqHeapExtractMin( pq->heap );
-    }
-  }
-  do {
-    -- pq->size;
-  } while( pq->size > 0 && *(pq->order[pq->size-1]) == NULL );
-  return sortMin;
-}
-
-/* really __gl_pqSortMinimum */
-PQkey pqMinimum( PriorityQ *pq )
-{
-  PQkey sortMin, heapMin;
-
-  if( pq->size == 0 ) {
-    return __gl_pqHeapMinimum( pq->heap );
-  }
-  sortMin = *(pq->order[pq->size-1]);
-  if( ! __gl_pqHeapIsEmpty( pq->heap )) {
-    heapMin = __gl_pqHeapMinimum( pq->heap );
-    if( LEQ( heapMin, sortMin )) {
-      return heapMin;
-    }
-  }
-  return sortMin;
-}
-
-/* really __gl_pqSortIsEmpty */
-int pqIsEmpty( PriorityQ *pq )
-{
-  return (pq->size == 0) && __gl_pqHeapIsEmpty( pq->heap );
-}
-
-/* really __gl_pqSortDelete */
-void pqDelete( PriorityQ *pq, PQhandle curr )
-{
-  if( curr >= 0 ) {
-    __gl_pqHeapDelete( pq->heap, curr );
-    return;
-  }
-  curr = -(curr+1);
-  assert( curr < pq->max && pq->keys[curr] != NULL );
-
-  pq->keys[curr] = NULL;
-  while( pq->size > 0 && *(pq->order[pq->size-1]) == NULL ) {
-    -- pq->size;
-  }
-}
diff --git a/mesalib/src/glu/sgi/libtess/priorityq.h b/mesalib/src/glu/sgi/libtess/priorityq.h
deleted file mode 100644
index 746cf5fa6..000000000
--- a/mesalib/src/glu/sgi/libtess/priorityq.h
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __priorityq_sort_h_
-#define __priorityq_sort_h_
-
-#include "priorityq-heap.h"
-
-#undef PQkey
-#undef PQhandle
-#undef PriorityQ
-#undef pqNewPriorityQ
-#undef pqDeletePriorityQ
-#undef pqInit
-#undef pqInsert
-#undef pqMinimum
-#undef pqExtractMin
-#undef pqDelete
-#undef pqIsEmpty
-
-/* Use #define's so that another heap implementation can use this one */
-
-#define PQkey			PQSortKey
-#define PQhandle		PQSortHandle
-#define PriorityQ		PriorityQSort
-
-#define pqNewPriorityQ(leq)	__gl_pqSortNewPriorityQ(leq)
-#define pqDeletePriorityQ(pq)	__gl_pqSortDeletePriorityQ(pq)
-
-/* The basic operations are insertion of a new key (pqInsert),
- * and examination/extraction of a key whose value is minimum
- * (pqMinimum/pqExtractMin).  Deletion is also allowed (pqDelete);
- * for this purpose pqInsert returns a "handle" which is supplied
- * as the argument.
- *
- * An initial heap may be created efficiently by calling pqInsert
- * repeatedly, then calling pqInit.  In any case pqInit must be called
- * before any operations other than pqInsert are used.
- *
- * If the heap is empty, pqMinimum/pqExtractMin will return a NULL key.
- * This may also be tested with pqIsEmpty.
- */
-#define pqInit(pq)		__gl_pqSortInit(pq)
-#define pqInsert(pq,key)	__gl_pqSortInsert(pq,key)
-#define pqMinimum(pq)		__gl_pqSortMinimum(pq)
-#define pqExtractMin(pq)	__gl_pqSortExtractMin(pq)
-#define pqDelete(pq,handle)	__gl_pqSortDelete(pq,handle)
-#define pqIsEmpty(pq)		__gl_pqSortIsEmpty(pq)
-
-
-/* Since we support deletion the data structure is a little more
- * complicated than an ordinary heap.  "nodes" is the heap itself;
- * active nodes are stored in the range 1..pq->size.  When the
- * heap exceeds its allocated size (pq->max), its size doubles.
- * The children of node i are nodes 2i and 2i+1.
- *
- * Each node stores an index into an array "handles".  Each handle
- * stores a key, plus a pointer back to the node which currently
- * represents that key (ie. nodes[handles[i].node].handle == i).
- */
-
-typedef PQHeapKey PQkey;
-typedef PQHeapHandle PQhandle;
-typedef struct PriorityQ PriorityQ;
-
-struct PriorityQ {
-  PriorityQHeap	*heap;
-  PQkey		*keys;
-  PQkey		**order;
-  PQhandle	size, max;
-  int		initialized;
-  int		(*leq)(PQkey key1, PQkey key2);
-};
-  
-PriorityQ	*pqNewPriorityQ( int (*leq)(PQkey key1, PQkey key2) );
-void		pqDeletePriorityQ( PriorityQ *pq );
-
-int		pqInit( PriorityQ *pq );
-PQhandle	pqInsert( PriorityQ *pq, PQkey key );
-PQkey		pqExtractMin( PriorityQ *pq );
-void		pqDelete( PriorityQ *pq, PQhandle handle );
-
-PQkey		pqMinimum( PriorityQ *pq );
-int		pqIsEmpty( PriorityQ *pq );
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/render.c b/mesalib/src/glu/sgi/libtess/render.c
deleted file mode 100644
index bca836f04..000000000
--- a/mesalib/src/glu/sgi/libtess/render.c
+++ /dev/null
@@ -1,502 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#include "gluos.h"
-#include <assert.h>
-#include <stddef.h>
-#include "mesh.h"
-#include "tess.h"
-#include "render.h"
-
-#ifndef TRUE
-#define TRUE 1
-#endif
-#ifndef FALSE
-#define FALSE 0
-#endif
-
-/* This structure remembers the information we need about a primitive
- * to be able to render it later, once we have determined which
- * primitive is able to use the most triangles.
- */
-struct FaceCount {
-  long		size;		/* number of triangles used */
-  GLUhalfEdge	*eStart;	/* edge where this primitive starts */
-  void		(*render)(GLUtesselator *, GLUhalfEdge *, long);
-                                /* routine to render this primitive */
-};
-
-static struct FaceCount MaximumFan( GLUhalfEdge *eOrig );
-static struct FaceCount MaximumStrip( GLUhalfEdge *eOrig );
-
-static void RenderFan( GLUtesselator *tess, GLUhalfEdge *eStart, long size );
-static void RenderStrip( GLUtesselator *tess, GLUhalfEdge *eStart, long size );
-static void RenderTriangle( GLUtesselator *tess, GLUhalfEdge *eStart,
-			    long size );
-
-static void RenderMaximumFaceGroup( GLUtesselator *tess, GLUface *fOrig );
-static void RenderLonelyTriangles( GLUtesselator *tess, GLUface *head );
-
-
-
-/************************ Strips and Fans decomposition ******************/
-
-/* __gl_renderMesh( tess, mesh ) takes a mesh and breaks it into triangle
- * fans, strips, and separate triangles.  A substantial effort is made
- * to use as few rendering primitives as possible (ie. to make the fans
- * and strips as large as possible).
- *
- * The rendering output is provided as callbacks (see the api).
- */
-void __gl_renderMesh( GLUtesselator *tess, GLUmesh *mesh )
-{
-  GLUface *f;
-
-  /* Make a list of separate triangles so we can render them all at once */
-  tess->lonelyTriList = NULL;
-
-  for( f = mesh->fHead.next; f != &mesh->fHead; f = f->next ) {
-    f->marked = FALSE;
-  }
-  for( f = mesh->fHead.next; f != &mesh->fHead; f = f->next ) {
-
-    /* We examine all faces in an arbitrary order.  Whenever we find
-     * an unprocessed face F, we output a group of faces including F
-     * whose size is maximum.
-     */
-    if( f->inside && ! f->marked ) {
-      RenderMaximumFaceGroup( tess, f );
-      assert( f->marked );
-    }
-  }
-  if( tess->lonelyTriList != NULL ) {
-    RenderLonelyTriangles( tess, tess->lonelyTriList );
-    tess->lonelyTriList = NULL;
-  }
-}
-
-
-static void RenderMaximumFaceGroup( GLUtesselator *tess, GLUface *fOrig )
-{
-  /* We want to find the largest triangle fan or strip of unmarked faces
-   * which includes the given face fOrig.  There are 3 possible fans
-   * passing through fOrig (one centered at each vertex), and 3 possible
-   * strips (one for each CCW permutation of the vertices).  Our strategy
-   * is to try all of these, and take the primitive which uses the most
-   * triangles (a greedy approach).
-   */
-  GLUhalfEdge *e = fOrig->anEdge;
-  struct FaceCount max, newFace;
-
-  max.size = 1;
-  max.eStart = e;
-  max.render = &RenderTriangle;
-
-  if( ! tess->flagBoundary ) {
-    newFace = MaximumFan( e ); if( newFace.size > max.size ) { max = newFace; }
-    newFace = MaximumFan( e->Lnext ); if( newFace.size > max.size ) { max = newFace; }
-    newFace = MaximumFan( e->Lprev ); if( newFace.size > max.size ) { max = newFace; }
-
-    newFace = MaximumStrip( e ); if( newFace.size > max.size ) { max = newFace; }
-    newFace = MaximumStrip( e->Lnext ); if( newFace.size > max.size ) { max = newFace; }
-    newFace = MaximumStrip( e->Lprev ); if( newFace.size > max.size ) { max = newFace; }
-  }
-  (*(max.render))( tess, max.eStart, max.size );
-}
-
-
-/* Macros which keep track of faces we have marked temporarily, and allow
- * us to backtrack when necessary.  With triangle fans, this is not
- * really necessary, since the only awkward case is a loop of triangles
- * around a single origin vertex.  However with strips the situation is
- * more complicated, and we need a general tracking method like the
- * one here.
- */
-#define Marked(f)	(! (f)->inside || (f)->marked)
-
-#define AddToTrail(f,t)	((f)->trail = (t), (t) = (f), (f)->marked = TRUE)
-
-#define FreeTrail(t)	do { \
-			  while( (t) != NULL ) { \
-			    (t)->marked = FALSE; t = (t)->trail; \
-			  } \
-			} while(0) /* absorb trailing semicolon */
-
-
-
-static struct FaceCount MaximumFan( GLUhalfEdge *eOrig )
-{
-  /* eOrig->Lface is the face we want to render.  We want to find the size
-   * of a maximal fan around eOrig->Org.  To do this we just walk around
-   * the origin vertex as far as possible in both directions.
-   */
-  struct FaceCount newFace = { 0, NULL, &RenderFan };
-  GLUface *trail = NULL;
-  GLUhalfEdge *e;
-
-  for( e = eOrig; ! Marked( e->Lface ); e = e->Onext ) {
-    AddToTrail( e->Lface, trail );
-    ++newFace.size;
-  }
-  for( e = eOrig; ! Marked( e->Rface ); e = e->Oprev ) {
-    AddToTrail( e->Rface, trail );
-    ++newFace.size;
-  }
-  newFace.eStart = e;
-  /*LINTED*/
-  FreeTrail( trail );
-  return newFace;
-}
-
-
-#define IsEven(n)	(((n) & 1) == 0)
-
-static struct FaceCount MaximumStrip( GLUhalfEdge *eOrig )
-{
-  /* Here we are looking for a maximal strip that contains the vertices
-   * eOrig->Org, eOrig->Dst, eOrig->Lnext->Dst (in that order or the
-   * reverse, such that all triangles are oriented CCW).
-   *
-   * Again we walk forward and backward as far as possible.  However for
-   * strips there is a twist: to get CCW orientations, there must be
-   * an *even* number of triangles in the strip on one side of eOrig.
-   * We walk the strip starting on a side with an even number of triangles;
-   * if both side have an odd number, we are forced to shorten one side.
-   */
-  struct FaceCount newFace = { 0, NULL, &RenderStrip };
-  long headSize = 0, tailSize = 0;
-  GLUface *trail = NULL;
-  GLUhalfEdge *e, *eTail, *eHead;
-
-  for( e = eOrig; ! Marked( e->Lface ); ++tailSize, e = e->Onext ) {
-    AddToTrail( e->Lface, trail );
-    ++tailSize;
-    e = e->Dprev;
-    if( Marked( e->Lface )) break;
-    AddToTrail( e->Lface, trail );
-  }
-  eTail = e;
-
-  for( e = eOrig; ! Marked( e->Rface ); ++headSize, e = e->Dnext ) {
-    AddToTrail( e->Rface, trail );
-    ++headSize;
-    e = e->Oprev;
-    if( Marked( e->Rface )) break;
-    AddToTrail( e->Rface, trail );
-  }
-  eHead = e;
-
-  newFace.size = tailSize + headSize;
-  if( IsEven( tailSize )) {
-    newFace.eStart = eTail->Sym;
-  } else if( IsEven( headSize )) {
-    newFace.eStart = eHead;
-  } else {
-    /* Both sides have odd length, we must shorten one of them.  In fact,
-     * we must start from eHead to guarantee inclusion of eOrig->Lface.
-     */
-    --newFace.size;
-    newFace.eStart = eHead->Onext;
-  }
-  /*LINTED*/
-  FreeTrail( trail );
-  return newFace;
-}
-
-
-static void RenderTriangle( GLUtesselator *tess, GLUhalfEdge *e, long size )
-{
-  /* Just add the triangle to a triangle list, so we can render all
-   * the separate triangles at once.
-   */
-  assert( size == 1 );
-  AddToTrail( e->Lface, tess->lonelyTriList );
-}
-
-
-static void RenderLonelyTriangles( GLUtesselator *tess, GLUface *f )
-{
-  /* Now we render all the separate triangles which could not be
-   * grouped into a triangle fan or strip.
-   */
-  GLUhalfEdge *e;
-  int newState;
-  int edgeState = -1;	/* force edge state output for first vertex */
-
-  CALL_BEGIN_OR_BEGIN_DATA( GL_TRIANGLES );
-
-  for( ; f != NULL; f = f->trail ) {
-    /* Loop once for each edge (there will always be 3 edges) */
-
-    e = f->anEdge;
-    do {
-      if( tess->flagBoundary ) {
-	/* Set the "edge state" to TRUE just before we output the
-	 * first vertex of each edge on the polygon boundary.
-	 */
-	newState = ! e->Rface->inside;
-	if( edgeState != newState ) {
-	  edgeState = newState;
-          CALL_EDGE_FLAG_OR_EDGE_FLAG_DATA( edgeState );
-	}
-      }
-      CALL_VERTEX_OR_VERTEX_DATA( e->Org->data );
-
-      e = e->Lnext;
-    } while( e != f->anEdge );
-  }
-  CALL_END_OR_END_DATA();
-}
-
-
-static void RenderFan( GLUtesselator *tess, GLUhalfEdge *e, long size )
-{
-  /* Render as many CCW triangles as possible in a fan starting from
-   * edge "e".  The fan *should* contain exactly "size" triangles
-   * (otherwise we've goofed up somewhere).
-   */
-  CALL_BEGIN_OR_BEGIN_DATA( GL_TRIANGLE_FAN ); 
-  CALL_VERTEX_OR_VERTEX_DATA( e->Org->data ); 
-  CALL_VERTEX_OR_VERTEX_DATA( e->Dst->data ); 
-
-  while( ! Marked( e->Lface )) {
-    e->Lface->marked = TRUE;
-    --size;
-    e = e->Onext;
-    CALL_VERTEX_OR_VERTEX_DATA( e->Dst->data ); 
-  }
-
-  assert( size == 0 );
-  CALL_END_OR_END_DATA();
-}
-
-
-static void RenderStrip( GLUtesselator *tess, GLUhalfEdge *e, long size )
-{
-  /* Render as many CCW triangles as possible in a strip starting from
-   * edge "e".  The strip *should* contain exactly "size" triangles
-   * (otherwise we've goofed up somewhere).
-   */
-  CALL_BEGIN_OR_BEGIN_DATA( GL_TRIANGLE_STRIP );
-  CALL_VERTEX_OR_VERTEX_DATA( e->Org->data ); 
-  CALL_VERTEX_OR_VERTEX_DATA( e->Dst->data ); 
-
-  while( ! Marked( e->Lface )) {
-    e->Lface->marked = TRUE;
-    --size;
-    e = e->Dprev;
-    CALL_VERTEX_OR_VERTEX_DATA( e->Org->data ); 
-    if( Marked( e->Lface )) break;
-
-    e->Lface->marked = TRUE;
-    --size;
-    e = e->Onext;
-    CALL_VERTEX_OR_VERTEX_DATA( e->Dst->data ); 
-  }
-
-  assert( size == 0 );
-  CALL_END_OR_END_DATA();
-}
-
-
-/************************ Boundary contour decomposition ******************/
-
-/* __gl_renderBoundary( tess, mesh ) takes a mesh, and outputs one
- * contour for each face marked "inside".  The rendering output is
- * provided as callbacks (see the api).
- */
-void __gl_renderBoundary( GLUtesselator *tess, GLUmesh *mesh )
-{
-  GLUface *f;
-  GLUhalfEdge *e;
-
-  for( f = mesh->fHead.next; f != &mesh->fHead; f = f->next ) {
-    if( f->inside ) {
-      CALL_BEGIN_OR_BEGIN_DATA( GL_LINE_LOOP );
-      e = f->anEdge;
-      do {
-        CALL_VERTEX_OR_VERTEX_DATA( e->Org->data ); 
-	e = e->Lnext;
-      } while( e != f->anEdge );
-      CALL_END_OR_END_DATA();
-    }
-  }
-}
-
-
-/************************ Quick-and-dirty decomposition ******************/
-
-#define SIGN_INCONSISTENT 2
-
-static int ComputeNormal( GLUtesselator *tess, GLdouble norm[3], int check )
-/*
- * If check==FALSE, we compute the polygon normal and place it in norm[].
- * If check==TRUE, we check that each triangle in the fan from v0 has a
- * consistent orientation with respect to norm[].  If triangles are
- * consistently oriented CCW, return 1; if CW, return -1; if all triangles
- * are degenerate return 0; otherwise (no consistent orientation) return
- * SIGN_INCONSISTENT.
- */
-{
-  CachedVertex *v0 = tess->cache;
-  CachedVertex *vn = v0 + tess->cacheCount;
-  CachedVertex *vc;
-  GLdouble dot, xc, yc, zc, xp, yp, zp, n[3];
-  int sign = 0;
-
-  /* Find the polygon normal.  It is important to get a reasonable
-   * normal even when the polygon is self-intersecting (eg. a bowtie).
-   * Otherwise, the computed normal could be very tiny, but perpendicular
-   * to the true plane of the polygon due to numerical noise.  Then all
-   * the triangles would appear to be degenerate and we would incorrectly
-   * decompose the polygon as a fan (or simply not render it at all).
-   *
-   * We use a sum-of-triangles normal algorithm rather than the more
-   * efficient sum-of-trapezoids method (used in CheckOrientation()
-   * in normal.c).  This lets us explicitly reverse the signed area
-   * of some triangles to get a reasonable normal in the self-intersecting
-   * case.
-   */
-  if( ! check ) {
-    norm[0] = norm[1] = norm[2] = 0.0;
-  }
-
-  vc = v0 + 1;
-  xc = vc->coords[0] - v0->coords[0];
-  yc = vc->coords[1] - v0->coords[1];
-  zc = vc->coords[2] - v0->coords[2];
-  while( ++vc < vn ) {
-    xp = xc; yp = yc; zp = zc;
-    xc = vc->coords[0] - v0->coords[0];
-    yc = vc->coords[1] - v0->coords[1];
-    zc = vc->coords[2] - v0->coords[2];
-
-    /* Compute (vp - v0) cross (vc - v0) */
-    n[0] = yp*zc - zp*yc;
-    n[1] = zp*xc - xp*zc;
-    n[2] = xp*yc - yp*xc;
-
-    dot = n[0]*norm[0] + n[1]*norm[1] + n[2]*norm[2];
-    if( ! check ) {
-      /* Reverse the contribution of back-facing triangles to get
-       * a reasonable normal for self-intersecting polygons (see above)
-       */
-      if( dot >= 0 ) {
-	norm[0] += n[0]; norm[1] += n[1]; norm[2] += n[2];
-      } else {
-	norm[0] -= n[0]; norm[1] -= n[1]; norm[2] -= n[2];
-      }
-    } else if( dot != 0 ) {
-      /* Check the new orientation for consistency with previous triangles */
-      if( dot > 0 ) {
-	if( sign < 0 ) return SIGN_INCONSISTENT;
-	sign = 1;
-      } else {
-	if( sign > 0 ) return SIGN_INCONSISTENT;
-	sign = -1;
-      }
-    }
-  }
-  return sign;
-}
-
-/* __gl_renderCache( tess ) takes a single contour and tries to render it
- * as a triangle fan.  This handles convex polygons, as well as some
- * non-convex polygons if we get lucky.
- *
- * Returns TRUE if the polygon was successfully rendered.  The rendering
- * output is provided as callbacks (see the api).
- */
-GLboolean __gl_renderCache( GLUtesselator *tess )
-{
-  CachedVertex *v0 = tess->cache;
-  CachedVertex *vn = v0 + tess->cacheCount;
-  CachedVertex *vc;
-  GLdouble norm[3];
-  int sign;
-
-  if( tess->cacheCount < 3 ) {
-    /* Degenerate contour -- no output */
-    return TRUE;
-  }
-
-  norm[0] = tess->normal[0];
-  norm[1] = tess->normal[1];
-  norm[2] = tess->normal[2];
-  if( norm[0] == 0 && norm[1] == 0 && norm[2] == 0 ) {
-    ComputeNormal( tess, norm, FALSE );
-  }
-
-  sign = ComputeNormal( tess, norm, TRUE );
-  if( sign == SIGN_INCONSISTENT ) {
-    /* Fan triangles did not have a consistent orientation */
-    return FALSE;
-  }
-  if( sign == 0 ) {
-    /* All triangles were degenerate */
-    return TRUE;
-  }
-
-  /* Make sure we do the right thing for each winding rule */
-  switch( tess->windingRule ) {
-  case GLU_TESS_WINDING_ODD:
-  case GLU_TESS_WINDING_NONZERO:
-    break;
-  case GLU_TESS_WINDING_POSITIVE:
-    if( sign < 0 ) return TRUE;
-    break;
-  case GLU_TESS_WINDING_NEGATIVE:
-    if( sign > 0 ) return TRUE;
-    break;
-  case GLU_TESS_WINDING_ABS_GEQ_TWO:
-    return TRUE;
-  }
-
-  CALL_BEGIN_OR_BEGIN_DATA( tess->boundaryOnly ? GL_LINE_LOOP
-			  : (tess->cacheCount > 3) ? GL_TRIANGLE_FAN
-			  : GL_TRIANGLES );
-
-  CALL_VERTEX_OR_VERTEX_DATA( v0->data ); 
-  if( sign > 0 ) {
-    for( vc = v0+1; vc < vn; ++vc ) {
-      CALL_VERTEX_OR_VERTEX_DATA( vc->data ); 
-    }
-  } else {
-    for( vc = vn-1; vc > v0; --vc ) {
-      CALL_VERTEX_OR_VERTEX_DATA( vc->data ); 
-    }
-  }
-  CALL_END_OR_END_DATA();
-  return TRUE;
-}
diff --git a/mesalib/src/glu/sgi/libtess/render.h b/mesalib/src/glu/sgi/libtess/render.h
deleted file mode 100644
index a298c9a94..000000000
--- a/mesalib/src/glu/sgi/libtess/render.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __render_h_
-#define __render_h_
-
-#include "mesh.h"
-
-/* __gl_renderMesh( tess, mesh ) takes a mesh and breaks it into triangle
- * fans, strips, and separate triangles.  A substantial effort is made
- * to use as few rendering primitives as possible (ie. to make the fans
- * and strips as large as possible).
- *
- * The rendering output is provided as callbacks (see the api).
- */
-void __gl_renderMesh( GLUtesselator *tess, GLUmesh *mesh );
-void __gl_renderBoundary( GLUtesselator *tess, GLUmesh *mesh );
-
-GLboolean __gl_renderCache( GLUtesselator *tess );
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/sweep.c b/mesalib/src/glu/sgi/libtess/sweep.c
deleted file mode 100644
index eca828ff6..000000000
--- a/mesalib/src/glu/sgi/libtess/sweep.c
+++ /dev/null
@@ -1,1361 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#include "gluos.h"
-#include <assert.h>
-#include <stddef.h>
-#include <setjmp.h>		/* longjmp */
-#include <limits.h>		/* LONG_MAX */
-
-#include "mesh.h"
-#include "geom.h"
-#include "tess.h"
-#include "dict.h"
-#include "priorityq.h"
-#include "memalloc.h"
-#include "sweep.h"
-
-#ifndef TRUE
-#define TRUE 1
-#endif
-#ifndef FALSE
-#define FALSE 0
-#endif
-
-#ifdef FOR_TRITE_TEST_PROGRAM
-extern void DebugEvent( GLUtesselator *tess );
-#else
-#define DebugEvent( tess )
-#endif
-
-/*
- * Invariants for the Edge Dictionary.
- * - each pair of adjacent edges e2=Succ(e1) satisfies EdgeLeq(e1,e2)
- *   at any valid location of the sweep event
- * - if EdgeLeq(e2,e1) as well (at any valid sweep event), then e1 and e2
- *   share a common endpoint
- * - for each e, e->Dst has been processed, but not e->Org
- * - each edge e satisfies VertLeq(e->Dst,event) && VertLeq(event,e->Org)
- *   where "event" is the current sweep line event.
- * - no edge e has zero length
- *
- * Invariants for the Mesh (the processed portion).
- * - the portion of the mesh left of the sweep line is a planar graph,
- *   ie. there is *some* way to embed it in the plane
- * - no processed edge has zero length
- * - no two processed vertices have identical coordinates
- * - each "inside" region is monotone, ie. can be broken into two chains
- *   of monotonically increasing vertices according to VertLeq(v1,v2)
- *   - a non-invariant: these chains may intersect (very slightly)
- *
- * Invariants for the Sweep.
- * - if none of the edges incident to the event vertex have an activeRegion
- *   (ie. none of these edges are in the edge dictionary), then the vertex
- *   has only right-going edges.
- * - if an edge is marked "fixUpperEdge" (it is a temporary edge introduced
- *   by ConnectRightVertex), then it is the only right-going edge from
- *   its associated vertex.  (This says that these edges exist only
- *   when it is necessary.)
- */
-
-#undef	MAX
-#undef	MIN
-#define MAX(x,y)	((x) >= (y) ? (x) : (y))
-#define MIN(x,y)	((x) <= (y) ? (x) : (y))
-
-/* When we merge two edges into one, we need to compute the combined
- * winding of the new edge.
- */
-#define AddWinding(eDst,eSrc)	(eDst->winding += eSrc->winding, \
-                                 eDst->Sym->winding += eSrc->Sym->winding)
-
-static void SweepEvent( GLUtesselator *tess, GLUvertex *vEvent );
-static void WalkDirtyRegions( GLUtesselator *tess, ActiveRegion *regUp );
-static int CheckForRightSplice( GLUtesselator *tess, ActiveRegion *regUp );
-
-static int EdgeLeq( GLUtesselator *tess, ActiveRegion *reg1,
-		    ActiveRegion *reg2 )
-/*
- * Both edges must be directed from right to left (this is the canonical
- * direction for the upper edge of each region).
- *
- * The strategy is to evaluate a "t" value for each edge at the
- * current sweep line position, given by tess->event.  The calculations
- * are designed to be very stable, but of course they are not perfect.
- *
- * Special case: if both edge destinations are at the sweep event,
- * we sort the edges by slope (they would otherwise compare equally).
- */
-{
-  GLUvertex *event = tess->event;
-  GLUhalfEdge *e1, *e2;
-  GLdouble t1, t2;
-
-  e1 = reg1->eUp;
-  e2 = reg2->eUp;
-
-  if( e1->Dst == event ) {
-    if( e2->Dst == event ) {
-      /* Two edges right of the sweep line which meet at the sweep event.
-       * Sort them by slope.
-       */
-      if( VertLeq( e1->Org, e2->Org )) {
-	return EdgeSign( e2->Dst, e1->Org, e2->Org ) <= 0;
-      }
-      return EdgeSign( e1->Dst, e2->Org, e1->Org ) >= 0;
-    }
-    return EdgeSign( e2->Dst, event, e2->Org ) <= 0;
-  }
-  if( e2->Dst == event ) {
-    return EdgeSign( e1->Dst, event, e1->Org ) >= 0;
-  }
-
-  /* General case - compute signed distance *from* e1, e2 to event */
-  t1 = EdgeEval( e1->Dst, event, e1->Org );
-  t2 = EdgeEval( e2->Dst, event, e2->Org );
-  return (t1 >= t2);
-}
-
-
-static void DeleteRegion( GLUtesselator *tess, ActiveRegion *reg )
-{
-  if( reg->fixUpperEdge ) {
-    /* It was created with zero winding number, so it better be
-     * deleted with zero winding number (ie. it better not get merged
-     * with a real edge).
-     */
-    assert( reg->eUp->winding == 0 );
-  }
-  reg->eUp->activeRegion = NULL;
-  dictDelete( tess->dict, reg->nodeUp ); /* __gl_dictListDelete */
-  memFree( reg );
-}
-
-
-static int FixUpperEdge( ActiveRegion *reg, GLUhalfEdge *newEdge )
-/*
- * Replace an upper edge which needs fixing (see ConnectRightVertex).
- */
-{
-  assert( reg->fixUpperEdge );
-  if ( !__gl_meshDelete( reg->eUp ) ) return 0;
-  reg->fixUpperEdge = FALSE;
-  reg->eUp = newEdge;
-  newEdge->activeRegion = reg;
-
-  return 1;
-}
-
-static ActiveRegion *TopLeftRegion( ActiveRegion *reg )
-{
-  GLUvertex *org = reg->eUp->Org;
-  GLUhalfEdge *e;
-
-  /* Find the region above the uppermost edge with the same origin */
-  do {
-    reg = RegionAbove( reg );
-  } while( reg->eUp->Org == org );
-
-  /* If the edge above was a temporary edge introduced by ConnectRightVertex,
-   * now is the time to fix it.
-   */
-  if( reg->fixUpperEdge ) {
-    e = __gl_meshConnect( RegionBelow(reg)->eUp->Sym, reg->eUp->Lnext );
-    if (e == NULL) return NULL;
-    if ( !FixUpperEdge( reg, e ) ) return NULL;
-    reg = RegionAbove( reg );
-  }
-  return reg;
-}
-
-static ActiveRegion *TopRightRegion( ActiveRegion *reg )
-{
-  GLUvertex *dst = reg->eUp->Dst;
-
-  /* Find the region above the uppermost edge with the same destination */
-  do {
-    reg = RegionAbove( reg );
-  } while( reg->eUp->Dst == dst );
-  return reg;
-}
-
-static ActiveRegion *AddRegionBelow( GLUtesselator *tess,
-				     ActiveRegion *regAbove,
-				     GLUhalfEdge *eNewUp )
-/*
- * Add a new active region to the sweep line, *somewhere* below "regAbove"
- * (according to where the new edge belongs in the sweep-line dictionary).
- * The upper edge of the new region will be "eNewUp".
- * Winding number and "inside" flag are not updated.
- */
-{
-  ActiveRegion *regNew = (ActiveRegion *)memAlloc( sizeof( ActiveRegion ));
-  if (regNew == NULL) longjmp(tess->env,1);
-
-  regNew->eUp = eNewUp;
-  /* __gl_dictListInsertBefore */
-  regNew->nodeUp = dictInsertBefore( tess->dict, regAbove->nodeUp, regNew );
-  if (regNew->nodeUp == NULL) longjmp(tess->env,1);
-  regNew->fixUpperEdge = FALSE;
-  regNew->sentinel = FALSE;
-  regNew->dirty = FALSE;
-
-  eNewUp->activeRegion = regNew;
-  return regNew;
-}
-
-static GLboolean IsWindingInside( GLUtesselator *tess, int n )
-{
-  switch( tess->windingRule ) {
-  case GLU_TESS_WINDING_ODD:
-    return (n & 1);
-  case GLU_TESS_WINDING_NONZERO:
-    return (n != 0);
-  case GLU_TESS_WINDING_POSITIVE:
-    return (n > 0);
-  case GLU_TESS_WINDING_NEGATIVE:
-    return (n < 0);
-  case GLU_TESS_WINDING_ABS_GEQ_TWO:
-    return (n >= 2) || (n <= -2);
-  }
-  /*LINTED*/
-  assert( FALSE );
-  /*NOTREACHED*/
-  return GL_FALSE;  /* avoid compiler complaints */
-}
-
-
-static void ComputeWinding( GLUtesselator *tess, ActiveRegion *reg )
-{
-  reg->windingNumber = RegionAbove(reg)->windingNumber + reg->eUp->winding;
-  reg->inside = IsWindingInside( tess, reg->windingNumber );
-}
-
-
-static void FinishRegion( GLUtesselator *tess, ActiveRegion *reg )
-/*
- * Delete a region from the sweep line.  This happens when the upper
- * and lower chains of a region meet (at a vertex on the sweep line).
- * The "inside" flag is copied to the appropriate mesh face (we could
- * not do this before -- since the structure of the mesh is always
- * changing, this face may not have even existed until now).
- */
-{
-  GLUhalfEdge *e = reg->eUp;
-  GLUface *f = e->Lface;
-
-  f->inside = reg->inside;
-  f->anEdge = e;   /* optimization for __gl_meshTessellateMonoRegion() */
-  DeleteRegion( tess, reg );
-}
-
-
-static GLUhalfEdge *FinishLeftRegions( GLUtesselator *tess,
-	       ActiveRegion *regFirst, ActiveRegion *regLast )
-/*
- * We are given a vertex with one or more left-going edges.  All affected
- * edges should be in the edge dictionary.  Starting at regFirst->eUp,
- * we walk down deleting all regions where both edges have the same
- * origin vOrg.  At the same time we copy the "inside" flag from the
- * active region to the face, since at this point each face will belong
- * to at most one region (this was not necessarily true until this point
- * in the sweep).  The walk stops at the region above regLast; if regLast
- * is NULL we walk as far as possible.	At the same time we relink the
- * mesh if necessary, so that the ordering of edges around vOrg is the
- * same as in the dictionary.
- */
-{
-  ActiveRegion *reg, *regPrev;
-  GLUhalfEdge *e, *ePrev;
-
-  regPrev = regFirst;
-  ePrev = regFirst->eUp;
-  while( regPrev != regLast ) {
-    regPrev->fixUpperEdge = FALSE;	/* placement was OK */
-    reg = RegionBelow( regPrev );
-    e = reg->eUp;
-    if( e->Org != ePrev->Org ) {
-      if( ! reg->fixUpperEdge ) {
-	/* Remove the last left-going edge.  Even though there are no further
-	 * edges in the dictionary with this origin, there may be further
-	 * such edges in the mesh (if we are adding left edges to a vertex
-	 * that has already been processed).  Thus it is important to call
-	 * FinishRegion rather than just DeleteRegion.
-	 */
-	FinishRegion( tess, regPrev );
-	break;
-      }
-      /* If the edge below was a temporary edge introduced by
-       * ConnectRightVertex, now is the time to fix it.
-       */
-      e = __gl_meshConnect( ePrev->Lprev, e->Sym );
-      if (e == NULL) longjmp(tess->env,1);
-      if ( !FixUpperEdge( reg, e ) ) longjmp(tess->env,1);
-    }
-
-    /* Relink edges so that ePrev->Onext == e */
-    if( ePrev->Onext != e ) {
-      if ( !__gl_meshSplice( e->Oprev, e ) ) longjmp(tess->env,1);
-      if ( !__gl_meshSplice( ePrev, e ) ) longjmp(tess->env,1);
-    }
-    FinishRegion( tess, regPrev );	/* may change reg->eUp */
-    ePrev = reg->eUp;
-    regPrev = reg;
-  }
-  return ePrev;
-}
-
-
-static void AddRightEdges( GLUtesselator *tess, ActiveRegion *regUp,
-       GLUhalfEdge *eFirst, GLUhalfEdge *eLast, GLUhalfEdge *eTopLeft,
-       GLboolean cleanUp )
-/*
- * Purpose: insert right-going edges into the edge dictionary, and update
- * winding numbers and mesh connectivity appropriately.  All right-going
- * edges share a common origin vOrg.  Edges are inserted CCW starting at
- * eFirst; the last edge inserted is eLast->Oprev.  If vOrg has any
- * left-going edges already processed, then eTopLeft must be the edge
- * such that an imaginary upward vertical segment from vOrg would be
- * contained between eTopLeft->Oprev and eTopLeft; otherwise eTopLeft
- * should be NULL.
- */
-{
-  ActiveRegion *reg, *regPrev;
-  GLUhalfEdge *e, *ePrev;
-  int firstTime = TRUE;
-
-  /* Insert the new right-going edges in the dictionary */
-  e = eFirst;
-  do {
-    assert( VertLeq( e->Org, e->Dst ));
-    AddRegionBelow( tess, regUp, e->Sym );
-    e = e->Onext;
-  } while ( e != eLast );
-
-  /* Walk *all* right-going edges from e->Org, in the dictionary order,
-   * updating the winding numbers of each region, and re-linking the mesh
-   * edges to match the dictionary ordering (if necessary).
-   */
-  if( eTopLeft == NULL ) {
-    eTopLeft = RegionBelow( regUp )->eUp->Rprev;
-  }
-  regPrev = regUp;
-  ePrev = eTopLeft;
-  for( ;; ) {
-    reg = RegionBelow( regPrev );
-    e = reg->eUp->Sym;
-    if( e->Org != ePrev->Org ) break;
-
-    if( e->Onext != ePrev ) {
-      /* Unlink e from its current position, and relink below ePrev */
-      if ( !__gl_meshSplice( e->Oprev, e ) ) longjmp(tess->env,1);
-      if ( !__gl_meshSplice( ePrev->Oprev, e ) ) longjmp(tess->env,1);
-    }
-    /* Compute the winding number and "inside" flag for the new regions */
-    reg->windingNumber = regPrev->windingNumber - e->winding;
-    reg->inside = IsWindingInside( tess, reg->windingNumber );
-
-    /* Check for two outgoing edges with same slope -- process these
-     * before any intersection tests (see example in __gl_computeInterior).
-     */
-    regPrev->dirty = TRUE;
-    if( ! firstTime && CheckForRightSplice( tess, regPrev )) {
-      AddWinding( e, ePrev );
-      DeleteRegion( tess, regPrev );
-      if ( !__gl_meshDelete( ePrev ) ) longjmp(tess->env,1);
-    }
-    firstTime = FALSE;
-    regPrev = reg;
-    ePrev = e;
-  }
-  regPrev->dirty = TRUE;
-  assert( regPrev->windingNumber - e->winding == reg->windingNumber );
-
-  if( cleanUp ) {
-    /* Check for intersections between newly adjacent edges. */
-    WalkDirtyRegions( tess, regPrev );
-  }
-}
-
-
-static void CallCombine( GLUtesselator *tess, GLUvertex *isect,
-			 void *data[4], GLfloat weights[4], int needed )
-{
-  GLdouble coords[3];
-
-  /* Copy coord data in case the callback changes it. */
-  coords[0] = isect->coords[0];
-  coords[1] = isect->coords[1];
-  coords[2] = isect->coords[2];
-
-  isect->data = NULL;
-  CALL_COMBINE_OR_COMBINE_DATA( coords, data, weights, &isect->data );
-  if( isect->data == NULL ) {
-    if( ! needed ) {
-      isect->data = data[0];
-    } else if( ! tess->fatalError ) {
-      /* The only way fatal error is when two edges are found to intersect,
-       * but the user has not provided the callback necessary to handle
-       * generated intersection points.
-       */
-      CALL_ERROR_OR_ERROR_DATA( GLU_TESS_NEED_COMBINE_CALLBACK );
-      tess->fatalError = TRUE;
-    }
-  }
-}
-
-static void SpliceMergeVertices( GLUtesselator *tess, GLUhalfEdge *e1,
-				 GLUhalfEdge *e2 )
-/*
- * Two vertices with idential coordinates are combined into one.
- * e1->Org is kept, while e2->Org is discarded.
- */
-{
-  void *data[4] = { NULL, NULL, NULL, NULL };
-  GLfloat weights[4] = { 0.5, 0.5, 0.0, 0.0 };
-
-  data[0] = e1->Org->data;
-  data[1] = e2->Org->data;
-  CallCombine( tess, e1->Org, data, weights, FALSE );
-  if ( !__gl_meshSplice( e1, e2 ) ) longjmp(tess->env,1);
-}
-
-static void VertexWeights( GLUvertex *isect, GLUvertex *org, GLUvertex *dst,
-			   GLfloat *weights )
-/*
- * Find some weights which describe how the intersection vertex is
- * a linear combination of "org" and "dest".  Each of the two edges
- * which generated "isect" is allocated 50% of the weight; each edge
- * splits the weight between its org and dst according to the
- * relative distance to "isect".
- */
-{
-  GLdouble t1 = VertL1dist( org, isect );
-  GLdouble t2 = VertL1dist( dst, isect );
-
-  weights[0] = 0.5 * t2 / (t1 + t2);
-  weights[1] = 0.5 * t1 / (t1 + t2);
-  isect->coords[0] += weights[0]*org->coords[0] + weights[1]*dst->coords[0];
-  isect->coords[1] += weights[0]*org->coords[1] + weights[1]*dst->coords[1];
-  isect->coords[2] += weights[0]*org->coords[2] + weights[1]*dst->coords[2];
-}
-
-
-static void GetIntersectData( GLUtesselator *tess, GLUvertex *isect,
-       GLUvertex *orgUp, GLUvertex *dstUp,
-       GLUvertex *orgLo, GLUvertex *dstLo )
-/*
- * We've computed a new intersection point, now we need a "data" pointer
- * from the user so that we can refer to this new vertex in the
- * rendering callbacks.
- */
-{
-  void *data[4];
-  GLfloat weights[4];
-
-  data[0] = orgUp->data;
-  data[1] = dstUp->data;
-  data[2] = orgLo->data;
-  data[3] = dstLo->data;
-
-  isect->coords[0] = isect->coords[1] = isect->coords[2] = 0;
-  VertexWeights( isect, orgUp, dstUp, &weights[0] );
-  VertexWeights( isect, orgLo, dstLo, &weights[2] );
-
-  CallCombine( tess, isect, data, weights, TRUE );
-}
-
-static int CheckForRightSplice( GLUtesselator *tess, ActiveRegion *regUp )
-/*
- * Check the upper and lower edge of "regUp", to make sure that the
- * eUp->Org is above eLo, or eLo->Org is below eUp (depending on which
- * origin is leftmost).
- *
- * The main purpose is to splice right-going edges with the same
- * dest vertex and nearly identical slopes (ie. we can't distinguish
- * the slopes numerically).  However the splicing can also help us
- * to recover from numerical errors.  For example, suppose at one
- * point we checked eUp and eLo, and decided that eUp->Org is barely
- * above eLo.  Then later, we split eLo into two edges (eg. from
- * a splice operation like this one).  This can change the result of
- * our test so that now eUp->Org is incident to eLo, or barely below it.
- * We must correct this condition to maintain the dictionary invariants.
- *
- * One possibility is to check these edges for intersection again
- * (ie. CheckForIntersect).  This is what we do if possible.  However
- * CheckForIntersect requires that tess->event lies between eUp and eLo,
- * so that it has something to fall back on when the intersection
- * calculation gives us an unusable answer.  So, for those cases where
- * we can't check for intersection, this routine fixes the problem
- * by just splicing the offending vertex into the other edge.
- * This is a guaranteed solution, no matter how degenerate things get.
- * Basically this is a combinatorial solution to a numerical problem.
- */
-{
-  ActiveRegion *regLo = RegionBelow(regUp);
-  GLUhalfEdge *eUp = regUp->eUp;
-  GLUhalfEdge *eLo = regLo->eUp;
-
-  if( VertLeq( eUp->Org, eLo->Org )) {
-    if( EdgeSign( eLo->Dst, eUp->Org, eLo->Org ) > 0 ) return FALSE;
-
-    /* eUp->Org appears to be below eLo */
-    if( ! VertEq( eUp->Org, eLo->Org )) {
-      /* Splice eUp->Org into eLo */
-      if ( __gl_meshSplitEdge( eLo->Sym ) == NULL) longjmp(tess->env,1);
-      if ( !__gl_meshSplice( eUp, eLo->Oprev ) ) longjmp(tess->env,1);
-      regUp->dirty = regLo->dirty = TRUE;
-
-    } else if( eUp->Org != eLo->Org ) {
-      /* merge the two vertices, discarding eUp->Org */
-      pqDelete( tess->pq, eUp->Org->pqHandle ); /* __gl_pqSortDelete */
-      SpliceMergeVertices( tess, eLo->Oprev, eUp );
-    }
-  } else {
-    if( EdgeSign( eUp->Dst, eLo->Org, eUp->Org ) < 0 ) return FALSE;
-
-    /* eLo->Org appears to be above eUp, so splice eLo->Org into eUp */
-    RegionAbove(regUp)->dirty = regUp->dirty = TRUE;
-    if (__gl_meshSplitEdge( eUp->Sym ) == NULL) longjmp(tess->env,1);
-    if ( !__gl_meshSplice( eLo->Oprev, eUp ) ) longjmp(tess->env,1);
-  }
-  return TRUE;
-}
-
-static int CheckForLeftSplice( GLUtesselator *tess, ActiveRegion *regUp )
-/*
- * Check the upper and lower edge of "regUp", to make sure that the
- * eUp->Dst is above eLo, or eLo->Dst is below eUp (depending on which
- * destination is rightmost).
- *
- * Theoretically, this should always be true.  However, splitting an edge
- * into two pieces can change the results of previous tests.  For example,
- * suppose at one point we checked eUp and eLo, and decided that eUp->Dst
- * is barely above eLo.  Then later, we split eLo into two edges (eg. from
- * a splice operation like this one).  This can change the result of
- * the test so that now eUp->Dst is incident to eLo, or barely below it.
- * We must correct this condition to maintain the dictionary invariants
- * (otherwise new edges might get inserted in the wrong place in the
- * dictionary, and bad stuff will happen).
- *
- * We fix the problem by just splicing the offending vertex into the
- * other edge.
- */
-{
-  ActiveRegion *regLo = RegionBelow(regUp);
-  GLUhalfEdge *eUp = regUp->eUp;
-  GLUhalfEdge *eLo = regLo->eUp;
-  GLUhalfEdge *e;
-
-  assert( ! VertEq( eUp->Dst, eLo->Dst ));
-
-  if( VertLeq( eUp->Dst, eLo->Dst )) {
-    if( EdgeSign( eUp->Dst, eLo->Dst, eUp->Org ) < 0 ) return FALSE;
-
-    /* eLo->Dst is above eUp, so splice eLo->Dst into eUp */
-    RegionAbove(regUp)->dirty = regUp->dirty = TRUE;
-    e = __gl_meshSplitEdge( eUp );
-    if (e == NULL) longjmp(tess->env,1);
-    if ( !__gl_meshSplice( eLo->Sym, e ) ) longjmp(tess->env,1);
-    e->Lface->inside = regUp->inside;
-  } else {
-    if( EdgeSign( eLo->Dst, eUp->Dst, eLo->Org ) > 0 ) return FALSE;
-
-    /* eUp->Dst is below eLo, so splice eUp->Dst into eLo */
-    regUp->dirty = regLo->dirty = TRUE;
-    e = __gl_meshSplitEdge( eLo );
-    if (e == NULL) longjmp(tess->env,1);
-    if ( !__gl_meshSplice( eUp->Lnext, eLo->Sym ) ) longjmp(tess->env,1);
-    e->Rface->inside = regUp->inside;
-  }
-  return TRUE;
-}
-
-
-static int CheckForIntersect( GLUtesselator *tess, ActiveRegion *regUp )
-/*
- * Check the upper and lower edges of the given region to see if
- * they intersect.  If so, create the intersection and add it
- * to the data structures.
- *
- * Returns TRUE if adding the new intersection resulted in a recursive
- * call to AddRightEdges(); in this case all "dirty" regions have been
- * checked for intersections, and possibly regUp has been deleted.
- */
-{
-  ActiveRegion *regLo = RegionBelow(regUp);
-  GLUhalfEdge *eUp = regUp->eUp;
-  GLUhalfEdge *eLo = regLo->eUp;
-  GLUvertex *orgUp = eUp->Org;
-  GLUvertex *orgLo = eLo->Org;
-  GLUvertex *dstUp = eUp->Dst;
-  GLUvertex *dstLo = eLo->Dst;
-  GLdouble tMinUp, tMaxLo;
-  GLUvertex isect, *orgMin;
-  GLUhalfEdge *e;
-
-  assert( ! VertEq( dstLo, dstUp ));
-  assert( EdgeSign( dstUp, tess->event, orgUp ) <= 0 );
-  assert( EdgeSign( dstLo, tess->event, orgLo ) >= 0 );
-  assert( orgUp != tess->event && orgLo != tess->event );
-  assert( ! regUp->fixUpperEdge && ! regLo->fixUpperEdge );
-
-  if( orgUp == orgLo ) return FALSE;	/* right endpoints are the same */
-
-  tMinUp = MIN( orgUp->t, dstUp->t );
-  tMaxLo = MAX( orgLo->t, dstLo->t );
-  if( tMinUp > tMaxLo ) return FALSE;	/* t ranges do not overlap */
-
-  if( VertLeq( orgUp, orgLo )) {
-    if( EdgeSign( dstLo, orgUp, orgLo ) > 0 ) return FALSE;
-  } else {
-    if( EdgeSign( dstUp, orgLo, orgUp ) < 0 ) return FALSE;
-  }
-
-  /* At this point the edges intersect, at least marginally */
-  DebugEvent( tess );
-
-  __gl_edgeIntersect( dstUp, orgUp, dstLo, orgLo, &isect );
-  /* The following properties are guaranteed: */
-  assert( MIN( orgUp->t, dstUp->t ) <= isect.t );
-  assert( isect.t <= MAX( orgLo->t, dstLo->t ));
-  assert( MIN( dstLo->s, dstUp->s ) <= isect.s );
-  assert( isect.s <= MAX( orgLo->s, orgUp->s ));
-
-  if( VertLeq( &isect, tess->event )) {
-    /* The intersection point lies slightly to the left of the sweep line,
-     * so move it until it''s slightly to the right of the sweep line.
-     * (If we had perfect numerical precision, this would never happen
-     * in the first place).  The easiest and safest thing to do is
-     * replace the intersection by tess->event.
-     */
-    isect.s = tess->event->s;
-    isect.t = tess->event->t;
-  }
-  /* Similarly, if the computed intersection lies to the right of the
-   * rightmost origin (which should rarely happen), it can cause
-   * unbelievable inefficiency on sufficiently degenerate inputs.
-   * (If you have the test program, try running test54.d with the
-   * "X zoom" option turned on).
-   */
-  orgMin = VertLeq( orgUp, orgLo ) ? orgUp : orgLo;
-  if( VertLeq( orgMin, &isect )) {
-    isect.s = orgMin->s;
-    isect.t = orgMin->t;
-  }
-
-  if( VertEq( &isect, orgUp ) || VertEq( &isect, orgLo )) {
-    /* Easy case -- intersection at one of the right endpoints */
-    (void) CheckForRightSplice( tess, regUp );
-    return FALSE;
-  }
-
-  if(	 (! VertEq( dstUp, tess->event )
-	  && EdgeSign( dstUp, tess->event, &isect ) >= 0)
-      || (! VertEq( dstLo, tess->event )
-	  && EdgeSign( dstLo, tess->event, &isect ) <= 0 ))
-  {
-    /* Very unusual -- the new upper or lower edge would pass on the
-     * wrong side of the sweep event, or through it.  This can happen
-     * due to very small numerical errors in the intersection calculation.
-     */
-    if( dstLo == tess->event ) {
-      /* Splice dstLo into eUp, and process the new region(s) */
-      if (__gl_meshSplitEdge( eUp->Sym ) == NULL) longjmp(tess->env,1);
-      if ( !__gl_meshSplice( eLo->Sym, eUp ) ) longjmp(tess->env,1);
-      regUp = TopLeftRegion( regUp );
-      if (regUp == NULL) longjmp(tess->env,1);
-      eUp = RegionBelow(regUp)->eUp;
-      FinishLeftRegions( tess, RegionBelow(regUp), regLo );
-      AddRightEdges( tess, regUp, eUp->Oprev, eUp, eUp, TRUE );
-      return TRUE;
-    }
-    if( dstUp == tess->event ) {
-      /* Splice dstUp into eLo, and process the new region(s) */
-      if (__gl_meshSplitEdge( eLo->Sym ) == NULL) longjmp(tess->env,1);
-      if ( !__gl_meshSplice( eUp->Lnext, eLo->Oprev ) ) longjmp(tess->env,1);
-      regLo = regUp;
-      regUp = TopRightRegion( regUp );
-      e = RegionBelow(regUp)->eUp->Rprev;
-      regLo->eUp = eLo->Oprev;
-      eLo = FinishLeftRegions( tess, regLo, NULL );
-      AddRightEdges( tess, regUp, eLo->Onext, eUp->Rprev, e, TRUE );
-      return TRUE;
-    }
-    /* Special case: called from ConnectRightVertex.  If either
-     * edge passes on the wrong side of tess->event, split it
-     * (and wait for ConnectRightVertex to splice it appropriately).
-     */
-    if( EdgeSign( dstUp, tess->event, &isect ) >= 0 ) {
-      RegionAbove(regUp)->dirty = regUp->dirty = TRUE;
-      if (__gl_meshSplitEdge( eUp->Sym ) == NULL) longjmp(tess->env,1);
-      eUp->Org->s = tess->event->s;
-      eUp->Org->t = tess->event->t;
-    }
-    if( EdgeSign( dstLo, tess->event, &isect ) <= 0 ) {
-      regUp->dirty = regLo->dirty = TRUE;
-      if (__gl_meshSplitEdge( eLo->Sym ) == NULL) longjmp(tess->env,1);
-      eLo->Org->s = tess->event->s;
-      eLo->Org->t = tess->event->t;
-    }
-    /* leave the rest for ConnectRightVertex */
-    return FALSE;
-  }
-
-  /* General case -- split both edges, splice into new vertex.
-   * When we do the splice operation, the order of the arguments is
-   * arbitrary as far as correctness goes.  However, when the operation
-   * creates a new face, the work done is proportional to the size of
-   * the new face.  We expect the faces in the processed part of
-   * the mesh (ie. eUp->Lface) to be smaller than the faces in the
-   * unprocessed original contours (which will be eLo->Oprev->Lface).
-   */
-  if (__gl_meshSplitEdge( eUp->Sym ) == NULL) longjmp(tess->env,1);
-  if (__gl_meshSplitEdge( eLo->Sym ) == NULL) longjmp(tess->env,1);
-  if ( !__gl_meshSplice( eLo->Oprev, eUp ) ) longjmp(tess->env,1);
-  eUp->Org->s = isect.s;
-  eUp->Org->t = isect.t;
-  eUp->Org->pqHandle = pqInsert( tess->pq, eUp->Org ); /* __gl_pqSortInsert */
-  if (eUp->Org->pqHandle == LONG_MAX) {
-     pqDeletePriorityQ(tess->pq);	/* __gl_pqSortDeletePriorityQ */
-     tess->pq = NULL;
-     longjmp(tess->env,1);
-  }
-  GetIntersectData( tess, eUp->Org, orgUp, dstUp, orgLo, dstLo );
-  RegionAbove(regUp)->dirty = regUp->dirty = regLo->dirty = TRUE;
-  return FALSE;
-}
-
-static void WalkDirtyRegions( GLUtesselator *tess, ActiveRegion *regUp )
-/*
- * When the upper or lower edge of any region changes, the region is
- * marked "dirty".  This routine walks through all the dirty regions
- * and makes sure that the dictionary invariants are satisfied
- * (see the comments at the beginning of this file).  Of course
- * new dirty regions can be created as we make changes to restore
- * the invariants.
- */
-{
-  ActiveRegion *regLo = RegionBelow(regUp);
-  GLUhalfEdge *eUp, *eLo;
-
-  for( ;; ) {
-    /* Find the lowest dirty region (we walk from the bottom up). */
-    while( regLo->dirty ) {
-      regUp = regLo;
-      regLo = RegionBelow(regLo);
-    }
-    if( ! regUp->dirty ) {
-      regLo = regUp;
-      regUp = RegionAbove( regUp );
-      if( regUp == NULL || ! regUp->dirty ) {
-	/* We've walked all the dirty regions */
-	return;
-      }
-    }
-    regUp->dirty = FALSE;
-    eUp = regUp->eUp;
-    eLo = regLo->eUp;
-
-    if( eUp->Dst != eLo->Dst ) {
-      /* Check that the edge ordering is obeyed at the Dst vertices. */
-      if( CheckForLeftSplice( tess, regUp )) {
-
-	/* If the upper or lower edge was marked fixUpperEdge, then
-	 * we no longer need it (since these edges are needed only for
-	 * vertices which otherwise have no right-going edges).
-	 */
-	if( regLo->fixUpperEdge ) {
-	  DeleteRegion( tess, regLo );
-	  if ( !__gl_meshDelete( eLo ) ) longjmp(tess->env,1);
-	  regLo = RegionBelow( regUp );
-	  eLo = regLo->eUp;
-	} else if( regUp->fixUpperEdge ) {
-	  DeleteRegion( tess, regUp );
-	  if ( !__gl_meshDelete( eUp ) ) longjmp(tess->env,1);
-	  regUp = RegionAbove( regLo );
-	  eUp = regUp->eUp;
-	}
-      }
-    }
-    if( eUp->Org != eLo->Org ) {
-      if(    eUp->Dst != eLo->Dst
-	  && ! regUp->fixUpperEdge && ! regLo->fixUpperEdge
-	  && (eUp->Dst == tess->event || eLo->Dst == tess->event) )
-      {
-	/* When all else fails in CheckForIntersect(), it uses tess->event
-	 * as the intersection location.  To make this possible, it requires
-	 * that tess->event lie between the upper and lower edges, and also
-	 * that neither of these is marked fixUpperEdge (since in the worst
-	 * case it might splice one of these edges into tess->event, and
-	 * violate the invariant that fixable edges are the only right-going
-	 * edge from their associated vertex).
-	 */
-	if( CheckForIntersect( tess, regUp )) {
-	  /* WalkDirtyRegions() was called recursively; we're done */
-	  return;
-	}
-      } else {
-	/* Even though we can't use CheckForIntersect(), the Org vertices
-	 * may violate the dictionary edge ordering.  Check and correct this.
-	 */
-	(void) CheckForRightSplice( tess, regUp );
-      }
-    }
-    if( eUp->Org == eLo->Org && eUp->Dst == eLo->Dst ) {
-      /* A degenerate loop consisting of only two edges -- delete it. */
-      AddWinding( eLo, eUp );
-      DeleteRegion( tess, regUp );
-      if ( !__gl_meshDelete( eUp ) ) longjmp(tess->env,1);
-      regUp = RegionAbove( regLo );
-    }
-  }
-}
-
-
-static void ConnectRightVertex( GLUtesselator *tess, ActiveRegion *regUp,
-				GLUhalfEdge *eBottomLeft )
-/*
- * Purpose: connect a "right" vertex vEvent (one where all edges go left)
- * to the unprocessed portion of the mesh.  Since there are no right-going
- * edges, two regions (one above vEvent and one below) are being merged
- * into one.  "regUp" is the upper of these two regions.
- *
- * There are two reasons for doing this (adding a right-going edge):
- *  - if the two regions being merged are "inside", we must add an edge
- *    to keep them separated (the combined region would not be monotone).
- *  - in any case, we must leave some record of vEvent in the dictionary,
- *    so that we can merge vEvent with features that we have not seen yet.
- *    For example, maybe there is a vertical edge which passes just to
- *    the right of vEvent; we would like to splice vEvent into this edge.
- *
- * However, we don't want to connect vEvent to just any vertex.  We don''t
- * want the new edge to cross any other edges; otherwise we will create
- * intersection vertices even when the input data had no self-intersections.
- * (This is a bad thing; if the user's input data has no intersections,
- * we don't want to generate any false intersections ourselves.)
- *
- * Our eventual goal is to connect vEvent to the leftmost unprocessed
- * vertex of the combined region (the union of regUp and regLo).
- * But because of unseen vertices with all right-going edges, and also
- * new vertices which may be created by edge intersections, we don''t
- * know where that leftmost unprocessed vertex is.  In the meantime, we
- * connect vEvent to the closest vertex of either chain, and mark the region
- * as "fixUpperEdge".  This flag says to delete and reconnect this edge
- * to the next processed vertex on the boundary of the combined region.
- * Quite possibly the vertex we connected to will turn out to be the
- * closest one, in which case we won''t need to make any changes.
- */
-{
-  GLUhalfEdge *eNew;
-  GLUhalfEdge *eTopLeft = eBottomLeft->Onext;
-  ActiveRegion *regLo = RegionBelow(regUp);
-  GLUhalfEdge *eUp = regUp->eUp;
-  GLUhalfEdge *eLo = regLo->eUp;
-  int degenerate = FALSE;
-
-  if( eUp->Dst != eLo->Dst ) {
-    (void) CheckForIntersect( tess, regUp );
-  }
-
-  /* Possible new degeneracies: upper or lower edge of regUp may pass
-   * through vEvent, or may coincide with new intersection vertex
-   */
-  if( VertEq( eUp->Org, tess->event )) {
-    if ( !__gl_meshSplice( eTopLeft->Oprev, eUp ) ) longjmp(tess->env,1);
-    regUp = TopLeftRegion( regUp );
-    if (regUp == NULL) longjmp(tess->env,1);
-    eTopLeft = RegionBelow( regUp )->eUp;
-    FinishLeftRegions( tess, RegionBelow(regUp), regLo );
-    degenerate = TRUE;
-  }
-  if( VertEq( eLo->Org, tess->event )) {
-    if ( !__gl_meshSplice( eBottomLeft, eLo->Oprev ) ) longjmp(tess->env,1);
-    eBottomLeft = FinishLeftRegions( tess, regLo, NULL );
-    degenerate = TRUE;
-  }
-  if( degenerate ) {
-    AddRightEdges( tess, regUp, eBottomLeft->Onext, eTopLeft, eTopLeft, TRUE );
-    return;
-  }
-
-  /* Non-degenerate situation -- need to add a temporary, fixable edge.
-   * Connect to the closer of eLo->Org, eUp->Org.
-   */
-  if( VertLeq( eLo->Org, eUp->Org )) {
-    eNew = eLo->Oprev;
-  } else {
-    eNew = eUp;
-  }
-  eNew = __gl_meshConnect( eBottomLeft->Lprev, eNew );
-  if (eNew == NULL) longjmp(tess->env,1);
-
-  /* Prevent cleanup, otherwise eNew might disappear before we've even
-   * had a chance to mark it as a temporary edge.
-   */
-  AddRightEdges( tess, regUp, eNew, eNew->Onext, eNew->Onext, FALSE );
-  eNew->Sym->activeRegion->fixUpperEdge = TRUE;
-  WalkDirtyRegions( tess, regUp );
-}
-
-/* Because vertices at exactly the same location are merged together
- * before we process the sweep event, some degenerate cases can't occur.
- * However if someone eventually makes the modifications required to
- * merge features which are close together, the cases below marked
- * TOLERANCE_NONZERO will be useful.  They were debugged before the
- * code to merge identical vertices in the main loop was added.
- */
-#define TOLERANCE_NONZERO	FALSE
-
-static void ConnectLeftDegenerate( GLUtesselator *tess,
-				   ActiveRegion *regUp, GLUvertex *vEvent )
-/*
- * The event vertex lies exacty on an already-processed edge or vertex.
- * Adding the new vertex involves splicing it into the already-processed
- * part of the mesh.
- */
-{
-  GLUhalfEdge *e, *eTopLeft, *eTopRight, *eLast;
-  ActiveRegion *reg;
-
-  e = regUp->eUp;
-  if( VertEq( e->Org, vEvent )) {
-    /* e->Org is an unprocessed vertex - just combine them, and wait
-     * for e->Org to be pulled from the queue
-     */
-    assert( TOLERANCE_NONZERO );
-    SpliceMergeVertices( tess, e, vEvent->anEdge );
-    return;
-  }
-
-  if( ! VertEq( e->Dst, vEvent )) {
-    /* General case -- splice vEvent into edge e which passes through it */
-    if (__gl_meshSplitEdge( e->Sym ) == NULL) longjmp(tess->env,1);
-    if( regUp->fixUpperEdge ) {
-      /* This edge was fixable -- delete unused portion of original edge */
-      if ( !__gl_meshDelete( e->Onext ) ) longjmp(tess->env,1);
-      regUp->fixUpperEdge = FALSE;
-    }
-    if ( !__gl_meshSplice( vEvent->anEdge, e ) ) longjmp(tess->env,1);
-    SweepEvent( tess, vEvent ); /* recurse */
-    return;
-  }
-
-  /* vEvent coincides with e->Dst, which has already been processed.
-   * Splice in the additional right-going edges.
-   */
-  assert( TOLERANCE_NONZERO );
-  regUp = TopRightRegion( regUp );
-  reg = RegionBelow( regUp );
-  eTopRight = reg->eUp->Sym;
-  eTopLeft = eLast = eTopRight->Onext;
-  if( reg->fixUpperEdge ) {
-    /* Here e->Dst has only a single fixable edge going right.
-     * We can delete it since now we have some real right-going edges.
-     */
-    assert( eTopLeft != eTopRight );   /* there are some left edges too */
-    DeleteRegion( tess, reg );
-    if ( !__gl_meshDelete( eTopRight ) ) longjmp(tess->env,1);
-    eTopRight = eTopLeft->Oprev;
-  }
-  if ( !__gl_meshSplice( vEvent->anEdge, eTopRight ) ) longjmp(tess->env,1);
-  if( ! EdgeGoesLeft( eTopLeft )) {
-    /* e->Dst had no left-going edges -- indicate this to AddRightEdges() */
-    eTopLeft = NULL;
-  }
-  AddRightEdges( tess, regUp, eTopRight->Onext, eLast, eTopLeft, TRUE );
-}
-
-
-static void ConnectLeftVertex( GLUtesselator *tess, GLUvertex *vEvent )
-/*
- * Purpose: connect a "left" vertex (one where both edges go right)
- * to the processed portion of the mesh.  Let R be the active region
- * containing vEvent, and let U and L be the upper and lower edge
- * chains of R.  There are two possibilities:
- *
- * - the normal case: split R into two regions, by connecting vEvent to
- *   the rightmost vertex of U or L lying to the left of the sweep line
- *
- * - the degenerate case: if vEvent is close enough to U or L, we
- *   merge vEvent into that edge chain.  The subcases are:
- *	- merging with the rightmost vertex of U or L
- *	- merging with the active edge of U or L
- *	- merging with an already-processed portion of U or L
- */
-{
-  ActiveRegion *regUp, *regLo, *reg;
-  GLUhalfEdge *eUp, *eLo, *eNew;
-  ActiveRegion tmp;
-
-  /* assert( vEvent->anEdge->Onext->Onext == vEvent->anEdge ); */
-
-  /* Get a pointer to the active region containing vEvent */
-  tmp.eUp = vEvent->anEdge->Sym;
-  /* __GL_DICTLISTKEY */ /* __gl_dictListSearch */
-  regUp = (ActiveRegion *)dictKey( dictSearch( tess->dict, &tmp ));
-  regLo = RegionBelow( regUp );
-  eUp = regUp->eUp;
-  eLo = regLo->eUp;
-
-  /* Try merging with U or L first */
-  if( EdgeSign( eUp->Dst, vEvent, eUp->Org ) == 0 ) {
-    ConnectLeftDegenerate( tess, regUp, vEvent );
-    return;
-  }
-
-  /* Connect vEvent to rightmost processed vertex of either chain.
-   * e->Dst is the vertex that we will connect to vEvent.
-   */
-  reg = VertLeq( eLo->Dst, eUp->Dst ) ? regUp : regLo;
-
-  if( regUp->inside || reg->fixUpperEdge) {
-    if( reg == regUp ) {
-      eNew = __gl_meshConnect( vEvent->anEdge->Sym, eUp->Lnext );
-      if (eNew == NULL) longjmp(tess->env,1);
-    } else {
-      GLUhalfEdge *tempHalfEdge= __gl_meshConnect( eLo->Dnext, vEvent->anEdge);
-      if (tempHalfEdge == NULL) longjmp(tess->env,1);
-
-      eNew = tempHalfEdge->Sym;
-    }
-    if( reg->fixUpperEdge ) {
-      if ( !FixUpperEdge( reg, eNew ) ) longjmp(tess->env,1);
-    } else {
-      ComputeWinding( tess, AddRegionBelow( tess, regUp, eNew ));
-    }
-    SweepEvent( tess, vEvent );
-  } else {
-    /* The new vertex is in a region which does not belong to the polygon.
-     * We don''t need to connect this vertex to the rest of the mesh.
-     */
-    AddRightEdges( tess, regUp, vEvent->anEdge, vEvent->anEdge, NULL, TRUE );
-  }
-}
-
-
-static void SweepEvent( GLUtesselator *tess, GLUvertex *vEvent )
-/*
- * Does everything necessary when the sweep line crosses a vertex.
- * Updates the mesh and the edge dictionary.
- */
-{
-  ActiveRegion *regUp, *reg;
-  GLUhalfEdge *e, *eTopLeft, *eBottomLeft;
-
-  tess->event = vEvent; 	/* for access in EdgeLeq() */
-  DebugEvent( tess );
-
-  /* Check if this vertex is the right endpoint of an edge that is
-   * already in the dictionary.  In this case we don't need to waste
-   * time searching for the location to insert new edges.
-   */
-  e = vEvent->anEdge;
-  while( e->activeRegion == NULL ) {
-    e = e->Onext;
-    if( e == vEvent->anEdge ) {
-      /* All edges go right -- not incident to any processed edges */
-      ConnectLeftVertex( tess, vEvent );
-      return;
-    }
-  }
-
-  /* Processing consists of two phases: first we "finish" all the
-   * active regions where both the upper and lower edges terminate
-   * at vEvent (ie. vEvent is closing off these regions).
-   * We mark these faces "inside" or "outside" the polygon according
-   * to their winding number, and delete the edges from the dictionary.
-   * This takes care of all the left-going edges from vEvent.
-   */
-  regUp = TopLeftRegion( e->activeRegion );
-  if (regUp == NULL) longjmp(tess->env,1);
-  reg = RegionBelow( regUp );
-  eTopLeft = reg->eUp;
-  eBottomLeft = FinishLeftRegions( tess, reg, NULL );
-
-  /* Next we process all the right-going edges from vEvent.  This
-   * involves adding the edges to the dictionary, and creating the
-   * associated "active regions" which record information about the
-   * regions between adjacent dictionary edges.
-   */
-  if( eBottomLeft->Onext == eTopLeft ) {
-    /* No right-going edges -- add a temporary "fixable" edge */
-    ConnectRightVertex( tess, regUp, eBottomLeft );
-  } else {
-    AddRightEdges( tess, regUp, eBottomLeft->Onext, eTopLeft, eTopLeft, TRUE );
-  }
-}
-
-
-/* Make the sentinel coordinates big enough that they will never be
- * merged with real input features.  (Even with the largest possible
- * input contour and the maximum tolerance of 1.0, no merging will be
- * done with coordinates larger than 3 * GLU_TESS_MAX_COORD).
- */
-#define SENTINEL_COORD	(4 * GLU_TESS_MAX_COORD)
-
-static void AddSentinel( GLUtesselator *tess, GLdouble t )
-/*
- * We add two sentinel edges above and below all other edges,
- * to avoid special cases at the top and bottom.
- */
-{
-  GLUhalfEdge *e;
-  ActiveRegion *reg = (ActiveRegion *)memAlloc( sizeof( ActiveRegion ));
-  if (reg == NULL) longjmp(tess->env,1);
-
-  e = __gl_meshMakeEdge( tess->mesh );
-  if (e == NULL) longjmp(tess->env,1);
-
-  e->Org->s = SENTINEL_COORD;
-  e->Org->t = t;
-  e->Dst->s = -SENTINEL_COORD;
-  e->Dst->t = t;
-  tess->event = e->Dst; 	/* initialize it */
-
-  reg->eUp = e;
-  reg->windingNumber = 0;
-  reg->inside = FALSE;
-  reg->fixUpperEdge = FALSE;
-  reg->sentinel = TRUE;
-  reg->dirty = FALSE;
-  reg->nodeUp = dictInsert( tess->dict, reg ); /* __gl_dictListInsertBefore */
-  if (reg->nodeUp == NULL) longjmp(tess->env,1);
-}
-
-
-static void InitEdgeDict( GLUtesselator *tess )
-/*
- * We maintain an ordering of edge intersections with the sweep line.
- * This order is maintained in a dynamic dictionary.
- */
-{
-  /* __gl_dictListNewDict */
-  tess->dict = dictNewDict( tess, (int (*)(void *, DictKey, DictKey)) EdgeLeq );
-  if (tess->dict == NULL) longjmp(tess->env,1);
-
-  AddSentinel( tess, -SENTINEL_COORD );
-  AddSentinel( tess, SENTINEL_COORD );
-}
-
-
-static void DoneEdgeDict( GLUtesselator *tess )
-{
-  ActiveRegion *reg;
-#ifndef NDEBUG
-  int fixedEdges = 0;
-#endif
-
-  /* __GL_DICTLISTKEY */ /* __GL_DICTLISTMIN */
-  while( (reg = (ActiveRegion *)dictKey( dictMin( tess->dict ))) != NULL ) {
-    /*
-     * At the end of all processing, the dictionary should contain
-     * only the two sentinel edges, plus at most one "fixable" edge
-     * created by ConnectRightVertex().
-     */
-    if( ! reg->sentinel ) {
-      assert( reg->fixUpperEdge );
-      assert( ++fixedEdges == 1 );
-    }
-    assert( reg->windingNumber == 0 );
-    DeleteRegion( tess, reg );
-/*    __gl_meshDelete( reg->eUp );*/
-  }
-  dictDeleteDict( tess->dict ); /* __gl_dictListDeleteDict */
-}
-
-
-static void RemoveDegenerateEdges( GLUtesselator *tess )
-/*
- * Remove zero-length edges, and contours with fewer than 3 vertices.
- */
-{
-  GLUhalfEdge *e, *eNext, *eLnext;
-  GLUhalfEdge *eHead = &tess->mesh->eHead;
-
-  /*LINTED*/
-  for( e = eHead->next; e != eHead; e = eNext ) {
-    eNext = e->next;
-    eLnext = e->Lnext;
-
-    if( VertEq( e->Org, e->Dst ) && e->Lnext->Lnext != e ) {
-      /* Zero-length edge, contour has at least 3 edges */
-
-      SpliceMergeVertices( tess, eLnext, e );	/* deletes e->Org */
-      if ( !__gl_meshDelete( e ) ) longjmp(tess->env,1); /* e is a self-loop */
-      e = eLnext;
-      eLnext = e->Lnext;
-    }
-    if( eLnext->Lnext == e ) {
-      /* Degenerate contour (one or two edges) */
-
-      if( eLnext != e ) {
-	if( eLnext == eNext || eLnext == eNext->Sym ) { eNext = eNext->next; }
-	if ( !__gl_meshDelete( eLnext ) ) longjmp(tess->env,1);
-      }
-      if( e == eNext || e == eNext->Sym ) { eNext = eNext->next; }
-      if ( !__gl_meshDelete( e ) ) longjmp(tess->env,1);
-    }
-  }
-}
-
-static int InitPriorityQ( GLUtesselator *tess )
-/*
- * Insert all vertices into the priority queue which determines the
- * order in which vertices cross the sweep line.
- */
-{
-  PriorityQ *pq;
-  GLUvertex *v, *vHead;
-
-  /* __gl_pqSortNewPriorityQ */
-  pq = tess->pq = pqNewPriorityQ( (int (*)(PQkey, PQkey)) __gl_vertLeq );
-  if (pq == NULL) return 0;
-
-  vHead = &tess->mesh->vHead;
-  for( v = vHead->next; v != vHead; v = v->next ) {
-    v->pqHandle = pqInsert( pq, v ); /* __gl_pqSortInsert */
-    if (v->pqHandle == LONG_MAX) break;
-  }
-  if (v != vHead || !pqInit( pq ) ) { /* __gl_pqSortInit */
-    pqDeletePriorityQ(tess->pq);	/* __gl_pqSortDeletePriorityQ */
-    tess->pq = NULL;
-    return 0;
-  }
-
-  return 1;
-}
-
-
-static void DonePriorityQ( GLUtesselator *tess )
-{
-  pqDeletePriorityQ( tess->pq ); /* __gl_pqSortDeletePriorityQ */
-}
-
-
-static int RemoveDegenerateFaces( GLUmesh *mesh )
-/*
- * Delete any degenerate faces with only two edges.  WalkDirtyRegions()
- * will catch almost all of these, but it won't catch degenerate faces
- * produced by splice operations on already-processed edges.
- * The two places this can happen are in FinishLeftRegions(), when
- * we splice in a "temporary" edge produced by ConnectRightVertex(),
- * and in CheckForLeftSplice(), where we splice already-processed
- * edges to ensure that our dictionary invariants are not violated
- * by numerical errors.
- *
- * In both these cases it is *very* dangerous to delete the offending
- * edge at the time, since one of the routines further up the stack
- * will sometimes be keeping a pointer to that edge.
- */
-{
-  GLUface *f, *fNext;
-  GLUhalfEdge *e;
-
-  /*LINTED*/
-  for( f = mesh->fHead.next; f != &mesh->fHead; f = fNext ) {
-    fNext = f->next;
-    e = f->anEdge;
-    assert( e->Lnext != e );
-
-    if( e->Lnext->Lnext == e ) {
-      /* A face with only two edges */
-      AddWinding( e->Onext, e );
-      if ( !__gl_meshDelete( e ) ) return 0;
-    }
-  }
-  return 1;
-}
-
-int __gl_computeInterior( GLUtesselator *tess )
-/*
- * __gl_computeInterior( tess ) computes the planar arrangement specified
- * by the given contours, and further subdivides this arrangement
- * into regions.  Each region is marked "inside" if it belongs
- * to the polygon, according to the rule given by tess->windingRule.
- * Each interior region is guaranteed be monotone.
- */
-{
-  GLUvertex *v, *vNext;
-
-  tess->fatalError = FALSE;
-
-  /* Each vertex defines an event for our sweep line.  Start by inserting
-   * all the vertices in a priority queue.  Events are processed in
-   * lexicographic order, ie.
-   *
-   *	e1 < e2  iff  e1.x < e2.x || (e1.x == e2.x && e1.y < e2.y)
-   */
-  RemoveDegenerateEdges( tess );
-  if ( !InitPriorityQ( tess ) ) return 0; /* if error */
-  InitEdgeDict( tess );
-
-  /* __gl_pqSortExtractMin */
-  while( (v = (GLUvertex *)pqExtractMin( tess->pq )) != NULL ) {
-    for( ;; ) {
-      vNext = (GLUvertex *)pqMinimum( tess->pq ); /* __gl_pqSortMinimum */
-      if( vNext == NULL || ! VertEq( vNext, v )) break;
-
-      /* Merge together all vertices at exactly the same location.
-       * This is more efficient than processing them one at a time,
-       * simplifies the code (see ConnectLeftDegenerate), and is also
-       * important for correct handling of certain degenerate cases.
-       * For example, suppose there are two identical edges A and B
-       * that belong to different contours (so without this code they would
-       * be processed by separate sweep events).  Suppose another edge C
-       * crosses A and B from above.  When A is processed, we split it
-       * at its intersection point with C.  However this also splits C,
-       * so when we insert B we may compute a slightly different
-       * intersection point.  This might leave two edges with a small
-       * gap between them.  This kind of error is especially obvious
-       * when using boundary extraction (GLU_TESS_BOUNDARY_ONLY).
-       */
-      vNext = (GLUvertex *)pqExtractMin( tess->pq ); /* __gl_pqSortExtractMin*/
-      SpliceMergeVertices( tess, v->anEdge, vNext->anEdge );
-    }
-    SweepEvent( tess, v );
-  }
-
-  /* Set tess->event for debugging purposes */
-  /* __GL_DICTLISTKEY */ /* __GL_DICTLISTMIN */
-  tess->event = ((ActiveRegion *) dictKey( dictMin( tess->dict )))->eUp->Org;
-  DebugEvent( tess );
-  DoneEdgeDict( tess );
-  DonePriorityQ( tess );
-
-  if ( !RemoveDegenerateFaces( tess->mesh ) ) return 0;
-  __gl_meshCheckMesh( tess->mesh );
-
-  return 1;
-}
diff --git a/mesalib/src/glu/sgi/libtess/sweep.h b/mesalib/src/glu/sgi/libtess/sweep.h
deleted file mode 100644
index feb68b0ff..000000000
--- a/mesalib/src/glu/sgi/libtess/sweep.h
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __sweep_h_
-#define __sweep_h_
-
-#include "mesh.h"
-
-/* __gl_computeInterior( tess ) computes the planar arrangement specified
- * by the given contours, and further subdivides this arrangement
- * into regions.  Each region is marked "inside" if it belongs
- * to the polygon, according to the rule given by tess->windingRule.
- * Each interior region is guaranteed be monotone.
- */
-int __gl_computeInterior( GLUtesselator *tess );
-
-
-/* The following is here *only* for access by debugging routines */
-
-#include "dict.h"
-
-/* For each pair of adjacent edges crossing the sweep line, there is
- * an ActiveRegion to represent the region between them.  The active
- * regions are kept in sorted order in a dynamic dictionary.  As the
- * sweep line crosses each vertex, we update the affected regions.
- */
-
-struct ActiveRegion {
-  GLUhalfEdge	*eUp;		/* upper edge, directed right to left */
-  DictNode	*nodeUp;	/* dictionary node corresponding to eUp */
-  int		windingNumber;	/* used to determine which regions are
-                                 * inside the polygon */
-  GLboolean	inside;		/* is this region inside the polygon? */
-  GLboolean	sentinel;	/* marks fake edges at t = +/-infinity */
-  GLboolean	dirty;		/* marks regions where the upper or lower
-                                 * edge has changed, but we haven't checked
-                                 * whether they intersect yet */
-  GLboolean	fixUpperEdge;	/* marks temporary edges introduced when
-                                 * we process a "right vertex" (one without
-                                 * any edges leaving to the right) */
-};
-
-#define RegionBelow(r)	((ActiveRegion *) dictKey(dictPred((r)->nodeUp)))
-#define RegionAbove(r)	((ActiveRegion *) dictKey(dictSucc((r)->nodeUp)))
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/tess.c b/mesalib/src/glu/sgi/libtess/tess.c
deleted file mode 100644
index 4a0e8dea7..000000000
--- a/mesalib/src/glu/sgi/libtess/tess.c
+++ /dev/null
@@ -1,632 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#include "gluos.h"
-#include <stddef.h>
-#include <assert.h>
-#include <setjmp.h>
-#include "memalloc.h"
-#include "tess.h"
-#include "mesh.h"
-#include "normal.h"
-#include "sweep.h"
-#include "tessmono.h"
-#include "render.h"
-
-#define GLU_TESS_DEFAULT_TOLERANCE 0.0
-#define GLU_TESS_MESH		100112	/* void (*)(GLUmesh *mesh)	    */
-
-#ifndef TRUE
-#define TRUE 1
-#endif
-#ifndef FALSE
-#define FALSE 0
-#endif
-
-/*ARGSUSED*/ static void GLAPIENTRY noBegin( GLenum type ) {}
-/*ARGSUSED*/ static void GLAPIENTRY noEdgeFlag( GLboolean boundaryEdge ) {}
-/*ARGSUSED*/ static void GLAPIENTRY noVertex( void *data ) {}
-/*ARGSUSED*/ static void GLAPIENTRY noEnd( void ) {}
-/*ARGSUSED*/ static void GLAPIENTRY noError( GLenum errnum ) {}
-/*ARGSUSED*/ static void GLAPIENTRY noCombine( GLdouble coords[3], void *data[4],
-				    GLfloat weight[4], void **dataOut ) {}
-/*ARGSUSED*/ static void GLAPIENTRY noMesh( GLUmesh *mesh ) {}
-
-
-/*ARGSUSED*/ void GLAPIENTRY __gl_noBeginData( GLenum type,
-					     void *polygonData ) {}
-/*ARGSUSED*/ void GLAPIENTRY __gl_noEdgeFlagData( GLboolean boundaryEdge,
-				       void *polygonData ) {}
-/*ARGSUSED*/ void GLAPIENTRY __gl_noVertexData( void *data,
-					      void *polygonData ) {}
-/*ARGSUSED*/ void GLAPIENTRY __gl_noEndData( void *polygonData ) {}
-/*ARGSUSED*/ void GLAPIENTRY __gl_noErrorData( GLenum errnum,
-					     void *polygonData ) {}
-/*ARGSUSED*/ void GLAPIENTRY __gl_noCombineData( GLdouble coords[3],
-					       void *data[4],
-					       GLfloat weight[4],
-					       void **outData,
-					       void *polygonData ) {}
-
-/* Half-edges are allocated in pairs (see mesh.c) */
-typedef struct { GLUhalfEdge e, eSym; } EdgePair;
-
-#undef	MAX
-#define MAX(a,b)	((a) > (b) ? (a) : (b))
-#define MAX_FAST_ALLOC	(MAX(sizeof(EdgePair), \
-                         MAX(sizeof(GLUvertex),sizeof(GLUface))))
-
-
-GLUtesselator * GLAPIENTRY
-gluNewTess( void )
-{
-  GLUtesselator *tess;
-
-  /* Only initialize fields which can be changed by the api.  Other fields
-   * are initialized where they are used.
-   */
-
-  if (memInit( MAX_FAST_ALLOC ) == 0) {
-     return 0;			/* out of memory */
-  }
-  tess = (GLUtesselator *)memAlloc( sizeof( GLUtesselator ));
-  if (tess == NULL) {
-     return 0;			/* out of memory */
-  }
-
-  tess->state = T_DORMANT;
-
-  tess->normal[0] = 0;
-  tess->normal[1] = 0;
-  tess->normal[2] = 0;
-
-  tess->relTolerance = GLU_TESS_DEFAULT_TOLERANCE;
-  tess->windingRule = GLU_TESS_WINDING_ODD;
-  tess->flagBoundary = FALSE;
-  tess->boundaryOnly = FALSE;
-
-  tess->callBegin = &noBegin;
-  tess->callEdgeFlag = &noEdgeFlag;
-  tess->callVertex = &noVertex;
-  tess->callEnd = &noEnd;
-
-  tess->callError = &noError;
-  tess->callCombine = &noCombine;
-  tess->callMesh = &noMesh;
-
-  tess->callBeginData= &__gl_noBeginData;
-  tess->callEdgeFlagData= &__gl_noEdgeFlagData;
-  tess->callVertexData= &__gl_noVertexData;
-  tess->callEndData= &__gl_noEndData;
-  tess->callErrorData= &__gl_noErrorData;
-  tess->callCombineData= &__gl_noCombineData;
-
-  tess->polygonData= NULL;
-
-  return tess;
-}
-
-static void MakeDormant( GLUtesselator *tess )
-{
-  /* Return the tessellator to its original dormant state. */
-
-  if( tess->mesh != NULL ) {
-    __gl_meshDeleteMesh( tess->mesh );
-  }
-  tess->state = T_DORMANT;
-  tess->lastEdge = NULL;
-  tess->mesh = NULL;
-}
-
-#define RequireState( tess, s )   if( tess->state != s ) GotoState(tess,s)
-
-static void GotoState( GLUtesselator *tess, enum TessState newState )
-{
-  while( tess->state != newState ) {
-    /* We change the current state one level at a time, to get to
-     * the desired state.
-     */
-    if( tess->state < newState ) {
-      switch( tess->state ) {
-      case T_DORMANT:
-	CALL_ERROR_OR_ERROR_DATA( GLU_TESS_MISSING_BEGIN_POLYGON );
-	gluTessBeginPolygon( tess, NULL );
-	break;
-      case T_IN_POLYGON:
-	CALL_ERROR_OR_ERROR_DATA( GLU_TESS_MISSING_BEGIN_CONTOUR );
-	gluTessBeginContour( tess );
-	break;
-      default:
-	 ;
-      }
-    } else {
-      switch( tess->state ) {
-      case T_IN_CONTOUR:
-	CALL_ERROR_OR_ERROR_DATA( GLU_TESS_MISSING_END_CONTOUR );
-	gluTessEndContour( tess );
-	break;
-      case T_IN_POLYGON:
-	CALL_ERROR_OR_ERROR_DATA( GLU_TESS_MISSING_END_POLYGON );
-	/* gluTessEndPolygon( tess ) is too much work! */
-	MakeDormant( tess );
-	break;
-      default:
-	 ;
-      }
-    }
-  }
-}
-
-
-void GLAPIENTRY
-gluDeleteTess( GLUtesselator *tess )
-{
-  RequireState( tess, T_DORMANT );
-  memFree( tess );
-}
-
-
-void GLAPIENTRY
-gluTessProperty( GLUtesselator *tess, GLenum which, GLdouble value )
-{
-  GLenum windingRule;
-
-  switch( which ) {
-  case GLU_TESS_TOLERANCE:
-    if( value < 0.0 || value > 1.0 ) break;
-    tess->relTolerance = value;
-    return;
-
-  case GLU_TESS_WINDING_RULE:
-    windingRule = (GLenum) value;
-    if( windingRule != value ) break;	/* not an integer */
-
-    switch( windingRule ) {
-    case GLU_TESS_WINDING_ODD:
-    case GLU_TESS_WINDING_NONZERO:
-    case GLU_TESS_WINDING_POSITIVE:
-    case GLU_TESS_WINDING_NEGATIVE:
-    case GLU_TESS_WINDING_ABS_GEQ_TWO:
-      tess->windingRule = windingRule;
-      return;
-    default:
-      break;
-    }
-
-  case GLU_TESS_BOUNDARY_ONLY:
-    tess->boundaryOnly = (value != 0);
-    return;
-
-  default:
-    CALL_ERROR_OR_ERROR_DATA( GLU_INVALID_ENUM );
-    return;
-  }
-  CALL_ERROR_OR_ERROR_DATA( GLU_INVALID_VALUE );
-}
-
-/* Returns tessellator property */
-void GLAPIENTRY
-gluGetTessProperty( GLUtesselator *tess, GLenum which, GLdouble *value )
-{
-   switch (which) {
-   case GLU_TESS_TOLERANCE:
-      /* tolerance should be in range [0..1] */
-      assert(0.0 <= tess->relTolerance && tess->relTolerance <= 1.0);
-      *value= tess->relTolerance;
-      break;
-   case GLU_TESS_WINDING_RULE:
-      assert(tess->windingRule == GLU_TESS_WINDING_ODD ||
-	     tess->windingRule == GLU_TESS_WINDING_NONZERO ||
-	     tess->windingRule == GLU_TESS_WINDING_POSITIVE ||
-	     tess->windingRule == GLU_TESS_WINDING_NEGATIVE ||
-	     tess->windingRule == GLU_TESS_WINDING_ABS_GEQ_TWO);
-      *value= tess->windingRule;
-      break;
-   case GLU_TESS_BOUNDARY_ONLY:
-      assert(tess->boundaryOnly == TRUE || tess->boundaryOnly == FALSE);
-      *value= tess->boundaryOnly;
-      break;
-   default:
-      *value= 0.0;
-      CALL_ERROR_OR_ERROR_DATA( GLU_INVALID_ENUM );
-      break;
-   }
-} /* gluGetTessProperty() */
-
-void GLAPIENTRY
-gluTessNormal( GLUtesselator *tess, GLdouble x, GLdouble y, GLdouble z )
-{
-  tess->normal[0] = x;
-  tess->normal[1] = y;
-  tess->normal[2] = z;
-}
-
-void GLAPIENTRY
-gluTessCallback( GLUtesselator *tess, GLenum which, _GLUfuncptr fn)
-{
-  switch( which ) {
-  case GLU_TESS_BEGIN:
-    tess->callBegin = (fn == NULL) ? &noBegin : (void (GLAPIENTRY *)(GLenum)) fn;
-    return;
-  case GLU_TESS_BEGIN_DATA:
-    tess->callBeginData = (fn == NULL) ?
-	&__gl_noBeginData : (void (GLAPIENTRY *)(GLenum, void *)) fn;
-    return;
-  case GLU_TESS_EDGE_FLAG:
-    tess->callEdgeFlag = (fn == NULL) ? &noEdgeFlag :
-					(void (GLAPIENTRY *)(GLboolean)) fn;
-    /* If the client wants boundary edges to be flagged,
-     * we render everything as separate triangles (no strips or fans).
-     */
-    tess->flagBoundary = (fn != NULL);
-    return;
-  case GLU_TESS_EDGE_FLAG_DATA:
-    tess->callEdgeFlagData= (fn == NULL) ?
-	&__gl_noEdgeFlagData : (void (GLAPIENTRY *)(GLboolean, void *)) fn;
-    /* If the client wants boundary edges to be flagged,
-     * we render everything as separate triangles (no strips or fans).
-     */
-    tess->flagBoundary = (fn != NULL);
-    return;
-  case GLU_TESS_VERTEX:
-    tess->callVertex = (fn == NULL) ? &noVertex :
-				      (void (GLAPIENTRY *)(void *)) fn;
-    return;
-  case GLU_TESS_VERTEX_DATA:
-    tess->callVertexData = (fn == NULL) ?
-	&__gl_noVertexData : (void (GLAPIENTRY *)(void *, void *)) fn;
-    return;
-  case GLU_TESS_END:
-    tess->callEnd = (fn == NULL) ? &noEnd : (void (GLAPIENTRY *)(void)) fn;
-    return;
-  case GLU_TESS_END_DATA:
-    tess->callEndData = (fn == NULL) ? &__gl_noEndData :
-				       (void (GLAPIENTRY *)(void *)) fn;
-    return;
-  case GLU_TESS_ERROR:
-    tess->callError = (fn == NULL) ? &noError : (void (GLAPIENTRY *)(GLenum)) fn;
-    return;
-  case GLU_TESS_ERROR_DATA:
-    tess->callErrorData = (fn == NULL) ?
-	&__gl_noErrorData : (void (GLAPIENTRY *)(GLenum, void *)) fn;
-    return;
-  case GLU_TESS_COMBINE:
-    tess->callCombine = (fn == NULL) ? &noCombine :
-	(void (GLAPIENTRY *)(GLdouble [3],void *[4], GLfloat [4], void ** )) fn;
-    return;
-  case GLU_TESS_COMBINE_DATA:
-    tess->callCombineData = (fn == NULL) ? &__gl_noCombineData :
-					   (void (GLAPIENTRY *)(GLdouble [3],
-						     void *[4],
-						     GLfloat [4],
-						     void **,
-						     void *)) fn;
-    return;
-  case GLU_TESS_MESH:
-    tess->callMesh = (fn == NULL) ? &noMesh : (void (GLAPIENTRY *)(GLUmesh *)) fn;
-    return;
-  default:
-    CALL_ERROR_OR_ERROR_DATA( GLU_INVALID_ENUM );
-    return;
-  }
-}
-
-static int AddVertex( GLUtesselator *tess, GLdouble coords[3], void *data )
-{
-  GLUhalfEdge *e;
-
-  e = tess->lastEdge;
-  if( e == NULL ) {
-    /* Make a self-loop (one vertex, one edge). */
-
-    e = __gl_meshMakeEdge( tess->mesh );
-    if (e == NULL) return 0;
-    if ( !__gl_meshSplice( e, e->Sym ) ) return 0;
-  } else {
-    /* Create a new vertex and edge which immediately follow e
-     * in the ordering around the left face.
-     */
-    if (__gl_meshSplitEdge( e ) == NULL) return 0;
-    e = e->Lnext;
-  }
-
-  /* The new vertex is now e->Org. */
-  e->Org->data = data;
-  e->Org->coords[0] = coords[0];
-  e->Org->coords[1] = coords[1];
-  e->Org->coords[2] = coords[2];
-
-  /* The winding of an edge says how the winding number changes as we
-   * cross from the edge''s right face to its left face.  We add the
-   * vertices in such an order that a CCW contour will add +1 to
-   * the winding number of the region inside the contour.
-   */
-  e->winding = 1;
-  e->Sym->winding = -1;
-
-  tess->lastEdge = e;
-
-  return 1;
-}
-
-
-static void CacheVertex( GLUtesselator *tess, GLdouble coords[3], void *data )
-{
-  CachedVertex *v = &tess->cache[tess->cacheCount];
-
-  v->data = data;
-  v->coords[0] = coords[0];
-  v->coords[1] = coords[1];
-  v->coords[2] = coords[2];
-  ++tess->cacheCount;
-}
-
-
-static int EmptyCache( GLUtesselator *tess )
-{
-  CachedVertex *v = tess->cache;
-  CachedVertex *vLast;
-
-  tess->mesh = __gl_meshNewMesh();
-  if (tess->mesh == NULL) return 0;
-
-  for( vLast = v + tess->cacheCount; v < vLast; ++v ) {
-    if ( !AddVertex( tess, v->coords, v->data ) ) return 0;
-  }
-  tess->cacheCount = 0;
-  tess->emptyCache = FALSE;
-
-  return 1;
-}
-
-
-void GLAPIENTRY
-gluTessVertex( GLUtesselator *tess, GLdouble coords[3], void *data )
-{
-  int i, tooLarge = FALSE;
-  GLdouble x, clamped[3];
-
-  RequireState( tess, T_IN_CONTOUR );
-
-  if( tess->emptyCache ) {
-    if ( !EmptyCache( tess ) ) {
-       CALL_ERROR_OR_ERROR_DATA( GLU_OUT_OF_MEMORY );
-       return;
-    }
-    tess->lastEdge = NULL;
-  }
-  for( i = 0; i < 3; ++i ) {
-    x = coords[i];
-    if( x < - GLU_TESS_MAX_COORD ) {
-      x = - GLU_TESS_MAX_COORD;
-      tooLarge = TRUE;
-    }
-    if( x > GLU_TESS_MAX_COORD ) {
-      x = GLU_TESS_MAX_COORD;
-      tooLarge = TRUE;
-    }
-    clamped[i] = x;
-  }
-  if( tooLarge ) {
-    CALL_ERROR_OR_ERROR_DATA( GLU_TESS_COORD_TOO_LARGE );
-  }
-
-  if( tess->mesh == NULL ) {
-    if( tess->cacheCount < TESS_MAX_CACHE ) {
-      CacheVertex( tess, clamped, data );
-      return;
-    }
-    if ( !EmptyCache( tess ) ) {
-       CALL_ERROR_OR_ERROR_DATA( GLU_OUT_OF_MEMORY );
-       return;
-    }
-  }
-  if ( !AddVertex( tess, clamped, data ) ) {
-       CALL_ERROR_OR_ERROR_DATA( GLU_OUT_OF_MEMORY );
-  }
-}
-
-
-void GLAPIENTRY
-gluTessBeginPolygon( GLUtesselator *tess, void *data )
-{
-  RequireState( tess, T_DORMANT );
-
-  tess->state = T_IN_POLYGON;
-  tess->cacheCount = 0;
-  tess->emptyCache = FALSE;
-  tess->mesh = NULL;
-
-  tess->polygonData= data;
-}
-
-
-void GLAPIENTRY
-gluTessBeginContour( GLUtesselator *tess )
-{
-  RequireState( tess, T_IN_POLYGON );
-
-  tess->state = T_IN_CONTOUR;
-  tess->lastEdge = NULL;
-  if( tess->cacheCount > 0 ) {
-    /* Just set a flag so we don't get confused by empty contours
-     * -- these can be generated accidentally with the obsolete
-     * NextContour() interface.
-     */
-    tess->emptyCache = TRUE;
-  }
-}
-
-
-void GLAPIENTRY
-gluTessEndContour( GLUtesselator *tess )
-{
-  RequireState( tess, T_IN_CONTOUR );
-  tess->state = T_IN_POLYGON;
-}
-
-void GLAPIENTRY
-gluTessEndPolygon( GLUtesselator *tess )
-{
-  GLUmesh *mesh;
-
-  if (setjmp(tess->env) != 0) { 
-     /* come back here if out of memory */
-     CALL_ERROR_OR_ERROR_DATA( GLU_OUT_OF_MEMORY );
-     return;
-  }
-
-  RequireState( tess, T_IN_POLYGON );
-  tess->state = T_DORMANT;
-
-  if( tess->mesh == NULL ) {
-    if( ! tess->flagBoundary && tess->callMesh == &noMesh ) {
-
-      /* Try some special code to make the easy cases go quickly
-       * (eg. convex polygons).  This code does NOT handle multiple contours,
-       * intersections, edge flags, and of course it does not generate
-       * an explicit mesh either.
-       */
-      if( __gl_renderCache( tess )) {
-	tess->polygonData= NULL;
-	return;
-      }
-    }
-    if ( !EmptyCache( tess ) ) longjmp(tess->env,1); /* could've used a label*/
-  }
-
-  /* Determine the polygon normal and project vertices onto the plane
-   * of the polygon.
-   */
-  __gl_projectPolygon( tess );
-
-  /* __gl_computeInterior( tess ) computes the planar arrangement specified
-   * by the given contours, and further subdivides this arrangement
-   * into regions.  Each region is marked "inside" if it belongs
-   * to the polygon, according to the rule given by tess->windingRule.
-   * Each interior region is guaranteed be monotone.
-   */
-  if ( !__gl_computeInterior( tess ) ) {
-     longjmp(tess->env,1);	/* could've used a label */
-  }
-
-  mesh = tess->mesh;
-  if( ! tess->fatalError ) {
-    int rc = 1;
-
-    /* If the user wants only the boundary contours, we throw away all edges
-     * except those which separate the interior from the exterior.
-     * Otherwise we tessellate all the regions marked "inside".
-     */
-    if( tess->boundaryOnly ) {
-      rc = __gl_meshSetWindingNumber( mesh, 1, TRUE );
-    } else {
-      rc = __gl_meshTessellateInterior( mesh );
-    }
-    if (rc == 0) longjmp(tess->env,1);	/* could've used a label */
-
-    __gl_meshCheckMesh( mesh );
-
-    if( tess->callBegin != &noBegin || tess->callEnd != &noEnd
-       || tess->callVertex != &noVertex || tess->callEdgeFlag != &noEdgeFlag
-       || tess->callBeginData != &__gl_noBeginData
-       || tess->callEndData != &__gl_noEndData
-       || tess->callVertexData != &__gl_noVertexData
-       || tess->callEdgeFlagData != &__gl_noEdgeFlagData )
-    {
-      if( tess->boundaryOnly ) {
-	__gl_renderBoundary( tess, mesh );  /* output boundary contours */
-      } else {
-	__gl_renderMesh( tess, mesh );	   /* output strips and fans */
-      }
-    }
-    if( tess->callMesh != &noMesh ) {
-
-      /* Throw away the exterior faces, so that all faces are interior.
-       * This way the user doesn't have to check the "inside" flag,
-       * and we don't need to even reveal its existence.  It also leaves
-       * the freedom for an implementation to not generate the exterior
-       * faces in the first place.
-       */
-      __gl_meshDiscardExterior( mesh );
-      (*tess->callMesh)( mesh );		/* user wants the mesh itself */
-      tess->mesh = NULL;
-      tess->polygonData= NULL;
-      return;
-    }
-  }
-  __gl_meshDeleteMesh( mesh );
-  tess->polygonData= NULL;
-  tess->mesh = NULL;
-}
-
-
-/*XXXblythe unused function*/
-#if 0
-void GLAPIENTRY
-gluDeleteMesh( GLUmesh *mesh )
-{
-  __gl_meshDeleteMesh( mesh );
-}
-#endif
-
-
-
-/*******************************************************/
-
-/* Obsolete calls -- for backward compatibility */
-
-void GLAPIENTRY
-gluBeginPolygon( GLUtesselator *tess )
-{
-  gluTessBeginPolygon( tess, NULL );
-  gluTessBeginContour( tess );
-}
-
-
-/*ARGSUSED*/
-void GLAPIENTRY
-gluNextContour( GLUtesselator *tess, GLenum type )
-{
-  gluTessEndContour( tess );
-  gluTessBeginContour( tess );
-}
-
-
-void GLAPIENTRY
-gluEndPolygon( GLUtesselator *tess )
-{
-  gluTessEndContour( tess );
-  gluTessEndPolygon( tess );
-}
diff --git a/mesalib/src/glu/sgi/libtess/tess.h b/mesalib/src/glu/sgi/libtess/tess.h
deleted file mode 100644
index 162496088..000000000
--- a/mesalib/src/glu/sgi/libtess/tess.h
+++ /dev/null
@@ -1,165 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __tess_h_
-#define __tess_h_
-
-#include <GL/glu.h>
-#include <setjmp.h>
-#include "mesh.h"
-#include "dict.h"
-#include "priorityq.h"
-
-/* The begin/end calls must be properly nested.  We keep track of
- * the current state to enforce the ordering.
- */
-enum TessState { T_DORMANT, T_IN_POLYGON, T_IN_CONTOUR };
-
-/* We cache vertex data for single-contour polygons so that we can
- * try a quick-and-dirty decomposition first.
- */
-#define TESS_MAX_CACHE	100
-
-typedef struct CachedVertex {
-  GLdouble	coords[3];
-  void		*data;
-} CachedVertex;
-
-struct GLUtesselator {
-
-  /*** state needed for collecting the input data ***/
-
-  enum TessState state;		/* what begin/end calls have we seen? */
-
-  GLUhalfEdge	*lastEdge;	/* lastEdge->Org is the most recent vertex */
-  GLUmesh	*mesh;		/* stores the input contours, and eventually
-                                   the tessellation itself */
-
-  void		(GLAPIENTRY *callError)( GLenum errnum );
-
-  /*** state needed for projecting onto the sweep plane ***/
-
-  GLdouble	normal[3];	/* user-specified normal (if provided) */
-  GLdouble	sUnit[3];	/* unit vector in s-direction (debugging) */
-  GLdouble	tUnit[3];	/* unit vector in t-direction (debugging) */
-
-  /*** state needed for the line sweep ***/
-
-  GLdouble	relTolerance;	/* tolerance for merging features */
-  GLenum	windingRule;	/* rule for determining polygon interior */
-  GLboolean	fatalError;	/* fatal error: needed combine callback */
-
-  Dict		*dict;		/* edge dictionary for sweep line */
-  PriorityQ	*pq;		/* priority queue of vertex events */
-  GLUvertex	*event;		/* current sweep event being processed */
-
-  void		(GLAPIENTRY *callCombine)( GLdouble coords[3], void *data[4],
-			        GLfloat weight[4], void **outData );
-
-  /*** state needed for rendering callbacks (see render.c) ***/
-
-  GLboolean	flagBoundary;	/* mark boundary edges (use EdgeFlag) */
-  GLboolean	boundaryOnly;	/* Extract contours, not triangles */
-  GLUface	*lonelyTriList;
-    /* list of triangles which could not be rendered as strips or fans */
-
-  void		(GLAPIENTRY *callBegin)( GLenum type );
-  void		(GLAPIENTRY *callEdgeFlag)( GLboolean boundaryEdge );
-  void		(GLAPIENTRY *callVertex)( void *data );
-  void		(GLAPIENTRY *callEnd)( void );
-  void		(GLAPIENTRY *callMesh)( GLUmesh *mesh );
-
-
-  /*** state needed to cache single-contour polygons for renderCache() */
-
-  GLboolean	emptyCache;		/* empty cache on next vertex() call */
-  int		cacheCount;		/* number of cached vertices */
-  CachedVertex	cache[TESS_MAX_CACHE];	/* the vertex data */
-
-  /*** rendering callbacks that also pass polygon data  ***/ 
-  void		(GLAPIENTRY *callBeginData)( GLenum type, void *polygonData );
-  void		(GLAPIENTRY *callEdgeFlagData)( GLboolean boundaryEdge, 
-				     void *polygonData );
-  void		(GLAPIENTRY *callVertexData)( void *data, void *polygonData );
-  void		(GLAPIENTRY *callEndData)( void *polygonData );
-  void		(GLAPIENTRY *callErrorData)( GLenum errnum, void *polygonData );
-  void		(GLAPIENTRY *callCombineData)( GLdouble coords[3], void *data[4],
-				    GLfloat weight[4], void **outData,
-				    void *polygonData );
-
-  jmp_buf env;			/* place to jump to when memAllocs fail */
-
-  void *polygonData;		/* client data for current polygon */
-};
-
-void GLAPIENTRY __gl_noBeginData( GLenum type, void *polygonData );
-void GLAPIENTRY __gl_noEdgeFlagData( GLboolean boundaryEdge, void *polygonData );
-void GLAPIENTRY __gl_noVertexData( void *data, void *polygonData );
-void GLAPIENTRY __gl_noEndData( void *polygonData );
-void GLAPIENTRY __gl_noErrorData( GLenum errnum, void *polygonData );
-void GLAPIENTRY __gl_noCombineData( GLdouble coords[3], void *data[4],
-			 GLfloat weight[4], void **outData,
-			 void *polygonData );
-
-#define CALL_BEGIN_OR_BEGIN_DATA(a) \
-   if (tess->callBeginData != &__gl_noBeginData) \
-      (*tess->callBeginData)((a),tess->polygonData); \
-   else (*tess->callBegin)((a));
-
-#define CALL_VERTEX_OR_VERTEX_DATA(a) \
-   if (tess->callVertexData != &__gl_noVertexData) \
-      (*tess->callVertexData)((a),tess->polygonData); \
-   else (*tess->callVertex)((a));
-
-#define CALL_EDGE_FLAG_OR_EDGE_FLAG_DATA(a) \
-   if (tess->callEdgeFlagData != &__gl_noEdgeFlagData) \
-      (*tess->callEdgeFlagData)((a),tess->polygonData); \
-   else (*tess->callEdgeFlag)((a));
-
-#define CALL_END_OR_END_DATA() \
-   if (tess->callEndData != &__gl_noEndData) \
-      (*tess->callEndData)(tess->polygonData); \
-   else (*tess->callEnd)();
-
-#define CALL_COMBINE_OR_COMBINE_DATA(a,b,c,d) \
-   if (tess->callCombineData != &__gl_noCombineData) \
-      (*tess->callCombineData)((a),(b),(c),(d),tess->polygonData); \
-   else (*tess->callCombine)((a),(b),(c),(d));
-
-#define CALL_ERROR_OR_ERROR_DATA(a) \
-   if (tess->callErrorData != &__gl_noErrorData) \
-      (*tess->callErrorData)((a),tess->polygonData); \
-   else (*tess->callError)((a));
-
-#endif
diff --git a/mesalib/src/glu/sgi/libtess/tessmono.c b/mesalib/src/glu/sgi/libtess/tessmono.c
deleted file mode 100644
index 4d0844005..000000000
--- a/mesalib/src/glu/sgi/libtess/tessmono.c
+++ /dev/null
@@ -1,201 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#include "gluos.h"
-#include <stdlib.h>
-#include "geom.h"
-#include "mesh.h"
-#include "tessmono.h"
-#include <assert.h>
-
-#define AddWinding(eDst,eSrc)	(eDst->winding += eSrc->winding, \
-				 eDst->Sym->winding += eSrc->Sym->winding)
-
-/* __gl_meshTessellateMonoRegion( face ) tessellates a monotone region
- * (what else would it do??)  The region must consist of a single
- * loop of half-edges (see mesh.h) oriented CCW.  "Monotone" in this
- * case means that any vertical line intersects the interior of the
- * region in a single interval.  
- *
- * Tessellation consists of adding interior edges (actually pairs of
- * half-edges), to split the region into non-overlapping triangles.
- *
- * The basic idea is explained in Preparata and Shamos (which I don''t
- * have handy right now), although their implementation is more
- * complicated than this one.  The are two edge chains, an upper chain
- * and a lower chain.  We process all vertices from both chains in order,
- * from right to left.
- *
- * The algorithm ensures that the following invariant holds after each
- * vertex is processed: the untessellated region consists of two
- * chains, where one chain (say the upper) is a single edge, and
- * the other chain is concave.  The left vertex of the single edge
- * is always to the left of all vertices in the concave chain.
- *
- * Each step consists of adding the rightmost unprocessed vertex to one
- * of the two chains, and forming a fan of triangles from the rightmost
- * of two chain endpoints.  Determining whether we can add each triangle
- * to the fan is a simple orientation test.  By making the fan as large
- * as possible, we restore the invariant (check it yourself).
- */
-int __gl_meshTessellateMonoRegion( GLUface *face )
-{
-  GLUhalfEdge *up, *lo;
-
-  /* All edges are oriented CCW around the boundary of the region.
-   * First, find the half-edge whose origin vertex is rightmost.
-   * Since the sweep goes from left to right, face->anEdge should
-   * be close to the edge we want.
-   */
-  up = face->anEdge;
-  assert( up->Lnext != up && up->Lnext->Lnext != up );
-
-  for( ; VertLeq( up->Dst, up->Org ); up = up->Lprev )
-    ;
-  for( ; VertLeq( up->Org, up->Dst ); up = up->Lnext )
-    ;
-  lo = up->Lprev;
-
-  while( up->Lnext != lo ) {
-    if( VertLeq( up->Dst, lo->Org )) {
-      /* up->Dst is on the left.  It is safe to form triangles from lo->Org.
-       * The EdgeGoesLeft test guarantees progress even when some triangles
-       * are CW, given that the upper and lower chains are truly monotone.
-       */
-      while( lo->Lnext != up && (EdgeGoesLeft( lo->Lnext )
-	     || EdgeSign( lo->Org, lo->Dst, lo->Lnext->Dst ) <= 0 )) {
-	GLUhalfEdge *tempHalfEdge= __gl_meshConnect( lo->Lnext, lo );
-	if (tempHalfEdge == NULL) return 0;
-	lo = tempHalfEdge->Sym;
-      }
-      lo = lo->Lprev;
-    } else {
-      /* lo->Org is on the left.  We can make CCW triangles from up->Dst. */
-      while( lo->Lnext != up && (EdgeGoesRight( up->Lprev )
-	     || EdgeSign( up->Dst, up->Org, up->Lprev->Org ) >= 0 )) {
-	GLUhalfEdge *tempHalfEdge= __gl_meshConnect( up, up->Lprev );
-	if (tempHalfEdge == NULL) return 0;
-	up = tempHalfEdge->Sym;
-      }
-      up = up->Lnext;
-    }
-  }
-
-  /* Now lo->Org == up->Dst == the leftmost vertex.  The remaining region
-   * can be tessellated in a fan from this leftmost vertex.
-   */
-  assert( lo->Lnext != up );
-  while( lo->Lnext->Lnext != up ) {
-    GLUhalfEdge *tempHalfEdge= __gl_meshConnect( lo->Lnext, lo );
-    if (tempHalfEdge == NULL) return 0;
-    lo = tempHalfEdge->Sym;
-  }
-
-  return 1;
-}
-
-
-/* __gl_meshTessellateInterior( mesh ) tessellates each region of
- * the mesh which is marked "inside" the polygon.  Each such region
- * must be monotone.
- */
-int __gl_meshTessellateInterior( GLUmesh *mesh )
-{
-  GLUface *f, *next;
-
-  /*LINTED*/
-  for( f = mesh->fHead.next; f != &mesh->fHead; f = next ) {
-    /* Make sure we don''t try to tessellate the new triangles. */
-    next = f->next;
-    if( f->inside ) {
-      if ( !__gl_meshTessellateMonoRegion( f ) ) return 0;
-    }
-  }
-
-  return 1;
-}
-
-
-/* __gl_meshDiscardExterior( mesh ) zaps (ie. sets to NULL) all faces
- * which are not marked "inside" the polygon.  Since further mesh operations
- * on NULL faces are not allowed, the main purpose is to clean up the
- * mesh so that exterior loops are not represented in the data structure.
- */
-void __gl_meshDiscardExterior( GLUmesh *mesh )
-{
-  GLUface *f, *next;
-
-  /*LINTED*/
-  for( f = mesh->fHead.next; f != &mesh->fHead; f = next ) {
-    /* Since f will be destroyed, save its next pointer. */
-    next = f->next;
-    if( ! f->inside ) {
-      __gl_meshZapFace( f );
-    }
-  }
-}
-
-#define MARKED_FOR_DELETION	0x7fffffff
-
-/* __gl_meshSetWindingNumber( mesh, value, keepOnlyBoundary ) resets the
- * winding numbers on all edges so that regions marked "inside" the
- * polygon have a winding number of "value", and regions outside
- * have a winding number of 0.
- *
- * If keepOnlyBoundary is TRUE, it also deletes all edges which do not
- * separate an interior region from an exterior one.
- */
-int __gl_meshSetWindingNumber( GLUmesh *mesh, int value,
-			        GLboolean keepOnlyBoundary )
-{
-  GLUhalfEdge *e, *eNext;
-
-  for( e = mesh->eHead.next; e != &mesh->eHead; e = eNext ) {
-    eNext = e->next;
-    if( e->Rface->inside != e->Lface->inside ) {
-
-      /* This is a boundary edge (one side is interior, one is exterior). */
-      e->winding = (e->Lface->inside) ? value : -value;
-    } else {
-
-      /* Both regions are interior, or both are exterior. */
-      if( ! keepOnlyBoundary ) {
-	e->winding = 0;
-      } else {
-	if ( !__gl_meshDelete( e ) ) return 0;
-      }
-    }
-  }
-  return 1;
-}
diff --git a/mesalib/src/glu/sgi/libtess/tessmono.h b/mesalib/src/glu/sgi/libtess/tessmono.h
deleted file mode 100644
index 8ee1b2fe3..000000000
--- a/mesalib/src/glu/sgi/libtess/tessmono.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-** Author: Eric Veach, July 1994.
-**
-*/
-
-#ifndef __tessmono_h_
-#define __tessmono_h_
-
-/* __gl_meshTessellateMonoRegion( face ) tessellates a monotone region
- * (what else would it do??)  The region must consist of a single
- * loop of half-edges (see mesh.h) oriented CCW.  "Monotone" in this
- * case means that any vertical line intersects the interior of the
- * region in a single interval.  
- *
- * Tessellation consists of adding interior edges (actually pairs of
- * half-edges), to split the region into non-overlapping triangles.
- *
- * __gl_meshTessellateInterior( mesh ) tessellates each region of
- * the mesh which is marked "inside" the polygon.  Each such region
- * must be monotone.
- *
- * __gl_meshDiscardExterior( mesh ) zaps (ie. sets to NULL) all faces
- * which are not marked "inside" the polygon.  Since further mesh operations
- * on NULL faces are not allowed, the main purpose is to clean up the
- * mesh so that exterior loops are not represented in the data structure.
- *
- * __gl_meshSetWindingNumber( mesh, value, keepOnlyBoundary ) resets the
- * winding numbers on all edges so that regions marked "inside" the
- * polygon have a winding number of "value", and regions outside
- * have a winding number of 0.
- *
- * If keepOnlyBoundary is TRUE, it also deletes all edges which do not
- * separate an interior region from an exterior one.
- */
-
-int __gl_meshTessellateMonoRegion( GLUface *face );
-int __gl_meshTessellateInterior( GLUmesh *mesh );
-void __gl_meshDiscardExterior( GLUmesh *mesh );
-int __gl_meshSetWindingNumber( GLUmesh *mesh, int value,
-			        GLboolean keepOnlyBoundary );
-
-#endif