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Diffstat (limited to 'nx-X11/extras/ogl-sample/main/gfx/lib/glu/libnurbs/nurbtess/partitionY.h')
-rw-r--r-- | nx-X11/extras/ogl-sample/main/gfx/lib/glu/libnurbs/nurbtess/partitionY.h | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libnurbs/nurbtess/partitionY.h b/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libnurbs/nurbtess/partitionY.h deleted file mode 100644 index 96d6a4c96..000000000 --- a/nx-X11/extras/ogl-sample/main/gfx/lib/glu/libnurbs/nurbtess/partitionY.h +++ /dev/null @@ -1,104 +0,0 @@ -/* -** License Applicability. Except to the extent portions of this file are -** made subject to an alternative license as permitted in the SGI Free -** Software License B, Version 1.1 (the "License"), the contents of this -** file are subject only to the provisions of the License. You may not use -** this file except in compliance with the License. You may obtain a copy -** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 -** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: -** -** http://oss.sgi.com/projects/FreeB -** -** Note that, as provided in the License, the Software is distributed on an -** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS -** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND -** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A -** PARTICULAR PURPOSE, AND NON-INFRINGEMENT. -** -** Original Code. The Original Code is: OpenGL Sample Implementation, -** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, -** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. -** Copyright in any portions created by third parties is as indicated -** elsewhere herein. All Rights Reserved. -** -** Additional Notice Provisions: The application programming interfaces -** established by SGI in conjunction with the Original Code are The -** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released -** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version -** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X -** Window System(R) (Version 1.3), released October 19, 1998. This software -** was created using the OpenGL(R) version 1.2.1 Sample Implementation -** published by SGI, but has not been independently verified as being -** compliant with the OpenGL(R) version 1.2.1 Specification. -** -** $Date: 2004/03/14 08:29:11 $ $Revision: 1.1.1.4 $ -*/ -/* - *partitionY.h: - *partition a polygon into a Y-monotone polygon: - * A polygon is Y-monotone if the boundary can be split into two polygon chains - *A and B such that each chain is Y-monotonic that is the intersection of any - *horizontal line intersects each chain has at most one connected componenets - * (empty, single point or a single line). - * - * A vertex is a cusp if both its ajacent vertices are either at or above v, - *or both at or below v. In addition, at least one of the ajacent verteces is - *strictly below or above v. - * A vertex is a relex vertex if the internals angle is strictly greater than - *180. In other words, if the the signed area is negative: - *(x1, y1), (x2, y2), (x3, y3) are the three vertices along a polygon, the - *order is such that left hand side is inside the polygon. Then (x2,y2) is - *reflex if: - * (x2-x1, y2-y1) cross (x3-x1, y3-y1) <0. - *A vertex is an interior cusp if it is a cusp and a reflex. - *A vertex is an exterior cusp if it is a cusp but not a reflex. - * - * $Header: /cvs/xorg/xc/extras/ogl-sample/main/gfx/lib/glu/libnurbs/nurbtess/partitionY.h,v 1.1.1.4 2004/03/14 08:29:11 eich Exp $ - */ - -#ifndef _PARTITIONY_H -#define _PARTITIONY_H - -#include "directedLine.h" - -/*whether an edge is below a vertex*/ -Int isBelow(directedLine *v, directedLine *e); - -/*whether an edge is above a vertex*/ -Int isAbove(directedLine *v, directedLine *e); - -/*not-cusp, - *inerior cusp - *exterior cusp - */ -Int cuspType(directedLine *v); - -/*used in trapezoidalization*/ -typedef struct sweepRange{ - directedLine *left; - Int leftType; /*either a vertex (leftType=0) or an edge (leftType =1) */ - directedLine *right; - Int rightType; /*either a vertex (rightType=0) or an edge (rightType =1) */ -} sweepRange; - -sweepRange* sweepRangeMake(directedLine* left, Int leftType, - directedLine* right, Int rightType); - -void sweepRangeDelete(sweepRange* range); -Int sweepRangeEqual(sweepRange* sr1, sweepRange* sr2); - -/*given a set of simple polygons where the interior - *is decided by left-hand principle, - *return a range (sight) for each vertex. This is called - *Trapezoidalization. - */ -void sweepY(Int nVertices, directedLine **sortedVerteces, sweepRange** ret_ranges); - - -directedLine* partitionY(directedLine *polygons, sampledLine **retSampledLines); - -void findDiagonals(Int total_num_edges, directedLine** sortedVertices, sweepRange** ranges, Int& num_diagonals, directedLine** diagonal_vertices); - -directedLine** DBGfindDiagonals(directedLine *polygons, Int& num_diagonals); - -#endif |