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author | marha <marha@users.sourceforge.net> | 2012-09-03 09:54:39 +0200 |
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committer | marha <marha@users.sourceforge.net> | 2012-09-04 14:23:32 +0200 |
commit | c18d12d1e36354ff32724c86ae25374d1a78607f (patch) | |
tree | 3db58d40725863f1d1145002f998a6cf0662fbf9 /mesalib/src/glu/sgi/libnurbs/internals/mesher.cc | |
parent | 77f54d0b20cc194e708bc664740e4c0b0e13c3dd (diff) | |
download | vcxsrv-c18d12d1e36354ff32724c86ae25374d1a78607f.tar.gz vcxsrv-c18d12d1e36354ff32724c86ae25374d1a78607f.tar.bz2 vcxsrv-c18d12d1e36354ff32724c86ae25374d1a78607f.zip |
mesa xkeyboard-config git update 3 sep 2012
Diffstat (limited to 'mesalib/src/glu/sgi/libnurbs/internals/mesher.cc')
-rw-r--r-- | mesalib/src/glu/sgi/libnurbs/internals/mesher.cc | 489 |
1 files changed, 0 insertions, 489 deletions
diff --git a/mesalib/src/glu/sgi/libnurbs/internals/mesher.cc b/mesalib/src/glu/sgi/libnurbs/internals/mesher.cc deleted file mode 100644 index b2d83f412..000000000 --- a/mesalib/src/glu/sgi/libnurbs/internals/mesher.cc +++ /dev/null @@ -1,489 +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. -*/ - -/* - * mesher.c++ - * - */ - -#include "glimports.h" -#include "myassert.h" -#include "mystdio.h" -#include "gridvertex.h" -#include "gridtrimvertex.h" -#include "jarcloc.h" -#include "gridline.h" -#include "trimline.h" -#include "uarray.h" -#include "backend.h" -#include "mesher.h" - - -const float Mesher::ZERO = 0.0; - -Mesher::Mesher( Backend& b ) - : backend( b ), - p( sizeof( GridTrimVertex ), 100, "GridTrimVertexPool" ) -{ - stacksize = 0; - vdata = 0; - last[0] = 0; - last[1] = 0; - itop = 0; - lastedge = 0; //needed to prevent purify UMR -} - -Mesher::~Mesher( void ) -{ - if( vdata ) delete[] vdata; -} - -void -Mesher::init( unsigned int npts ) -{ - p.clear(); - if( stacksize < npts ) { - stacksize = 2 * npts; - if( vdata ) delete[] vdata; - vdata = new GridTrimVertex_p[stacksize]; - } -} - -inline void -Mesher::push( GridTrimVertex *gt ) -{ - assert( itop+1 != (int)stacksize ); - vdata[++itop] = gt; -} - -inline void -Mesher::pop( long ) -{ -} - -inline void -Mesher::openMesh() -{ - backend.bgntmesh( "addedge" ); -} - -inline void -Mesher::closeMesh() -{ - backend.endtmesh(); -} - -inline void -Mesher::swapMesh() -{ - backend.swaptmesh(); -} - -inline void -Mesher::clearStack() -{ - itop = -1; - last[0] = 0; -} - -void -Mesher::finishLower( GridTrimVertex *gtlower ) -{ - for( push(gtlower); - nextlower( gtlower=new(p) GridTrimVertex ); - push(gtlower) ) - addLower(); - addLast(); -} - -void -Mesher::finishUpper( GridTrimVertex *gtupper ) -{ - for( push(gtupper); - nextupper( gtupper=new(p) GridTrimVertex ); - push(gtupper) ) - addUpper(); - addLast(); -} - -void -Mesher::mesh( void ) -{ - GridTrimVertex *gtlower, *gtupper; - - Hull::init( ); - nextupper( gtupper = new(p) GridTrimVertex ); - nextlower( gtlower = new(p) GridTrimVertex ); - - clearStack(); - openMesh(); - push(gtupper); - - nextupper( gtupper = new(p) GridTrimVertex ); - nextlower( gtlower ); - - assert( gtupper->t && gtlower->t ); - - if( gtupper->t->param[0] < gtlower->t->param[0] ) { - push(gtupper); - lastedge = 1; - if( nextupper( gtupper=new(p) GridTrimVertex ) == 0 ) { - finishLower(gtlower); - return; - } - } else if( gtupper->t->param[0] > gtlower->t->param[0] ) { - push(gtlower); - lastedge = 0; - if( nextlower( gtlower=new(p) GridTrimVertex ) == 0 ) { - finishUpper(gtupper); - return; - } - } else { - if( lastedge == 0 ) { - push(gtupper); - lastedge = 1; - if( nextupper(gtupper=new(p) GridTrimVertex) == 0 ) { - finishLower(gtlower); - return; - } - } else { - push(gtlower); - lastedge = 0; - if( nextlower( gtlower=new(p) GridTrimVertex ) == 0 ) { - finishUpper(gtupper); - return; - } - } - } - - while ( 1 ) { - if( gtupper->t->param[0] < gtlower->t->param[0] ) { - push(gtupper); - addUpper(); - if( nextupper( gtupper=new(p) GridTrimVertex ) == 0 ) { - finishLower(gtlower); - return; - } - } else if( gtupper->t->param[0] > gtlower->t->param[0] ) { - push(gtlower); - addLower(); - if( nextlower( gtlower=new(p) GridTrimVertex ) == 0 ) { - finishUpper(gtupper); - return; - } - } else { - if( lastedge == 0 ) { - push(gtupper); - addUpper(); - if( nextupper( gtupper=new(p) GridTrimVertex ) == 0 ) { - finishLower(gtlower); - return; - } - } else { - push(gtlower); - addLower(); - if( nextlower( gtlower=new(p) GridTrimVertex ) == 0 ) { - finishUpper(gtupper); - return; - } - } - } - } -} - -inline int -Mesher::isCcw( int ilast ) -{ - REAL area = det3( vdata[ilast]->t, vdata[itop-1]->t, vdata[itop-2]->t ); - return (area < ZERO) ? 0 : 1; -} - -inline int -Mesher::isCw( int ilast ) -{ - REAL area = det3( vdata[ilast]->t, vdata[itop-1]->t, vdata[itop-2]->t ); - return (area > -ZERO) ? 0 : 1; -} - -inline int -Mesher::equal( int x, int y ) -{ - return( last[0] == vdata[x] && last[1] == vdata[y] ); -} - -inline void -Mesher::copy( int x, int y ) -{ - last[0] = vdata[x]; last[1] = vdata[y]; -} - -inline void -Mesher::move( int x, int y ) -{ - vdata[x] = vdata[y]; -} - -inline void -Mesher::output( int x ) -{ - backend.tmeshvert( vdata[x] ); -} - -/*--------------------------------------------------------------------------- - * addedge - addedge an edge to the triangulation - * - * This code has been re-written to generate large triangle meshes - * from a monotone polygon. Although smaller triangle meshes - * could be generated faster and with less code, larger meshes - * actually give better SYSTEM performance. This is because - * vertices are processed in the backend slower than they are - * generated by this code and any decrease in the number of vertices - * results in a decrease in the time spent in the backend. - *--------------------------------------------------------------------------- - */ - -void -Mesher::addLast( ) -{ - register int ilast = itop; - - if( lastedge == 0 ) { - if( equal( 0, 1 ) ) { - output( ilast ); - swapMesh(); - for( register int i = 2; i < ilast; i++ ) { - swapMesh(); - output( i ); - } - copy( ilast, ilast-1 ); - } else if( equal( ilast-2, ilast-1) ) { - swapMesh(); - output( ilast ); - for( register int i = ilast-3; i >= 0; i-- ) { - output( i ); - swapMesh(); - } - copy( 0, ilast ); - } else { - closeMesh(); openMesh(); - output( ilast ); - output( 0 ); - for( register int i = 1; i < ilast; i++ ) { - swapMesh(); - output( i ); - } - copy( ilast, ilast-1 ); - } - } else { - if( equal( 1, 0) ) { - swapMesh(); - output( ilast ); - for( register int i = 2; i < ilast; i++ ) { - output( i ); - swapMesh(); - } - copy( ilast-1, ilast ); - } else if( equal( ilast-1, ilast-2) ) { - output( ilast ); - swapMesh(); - for( register int i = ilast-3; i >= 0; i-- ) { - swapMesh(); - output( i ); - } - copy( ilast, 0 ); - } else { - closeMesh(); openMesh(); - output( 0 ); - output( ilast ); - for( register int i = 1; i < ilast; i++ ) { - output( i ); - swapMesh(); - } - copy( ilast-1, ilast ); - } - } - closeMesh(); - //for( register long k=0; k<=ilast; k++ ) pop( k ); -} - -void -Mesher::addUpper( ) -{ - register int ilast = itop; - - if( lastedge == 0 ) { - if( equal( 0, 1 ) ) { - output( ilast ); - swapMesh(); - for( register int i = 2; i < ilast; i++ ) { - swapMesh(); - output( i ); - } - copy( ilast, ilast-1 ); - } else if( equal( ilast-2, ilast-1) ) { - swapMesh(); - output( ilast ); - for( register int i = ilast-3; i >= 0; i-- ) { - output( i ); - swapMesh(); - } - copy( 0, ilast ); - } else { - closeMesh(); openMesh(); - output( ilast ); - output( 0 ); - for( register int i = 1; i < ilast; i++ ) { - swapMesh(); - output( i ); - } - copy( ilast, ilast-1 ); - } - lastedge = 1; - //for( register long k=0; k<ilast-1; k++ ) pop( k ); - move( 0, ilast-1 ); - move( 1, ilast ); - itop = 1; - } else { - if( ! isCcw( ilast ) ) return; - do { - itop--; - } while( (itop > 1) && isCcw( ilast ) ); - - if( equal( ilast-1, ilast-2 ) ) { - output( ilast ); - swapMesh(); - for( register int i=ilast-3; i>=itop-1; i-- ) { - swapMesh(); - output( i ); - } - copy( ilast, itop-1 ); - } else if( equal( itop, itop-1 ) ) { - swapMesh(); - output( ilast ); - for( register int i = itop+1; i < ilast; i++ ) { - output( i ); - swapMesh(); - } - copy( ilast-1, ilast ); - } else { - closeMesh(); openMesh(); - output( ilast ); - output( ilast-1 ); - for( register int i=ilast-2; i>=itop-1; i-- ) { - swapMesh(); - output( i ); - } - copy( ilast, itop-1 ); - } - //for( register int k=itop; k<ilast; k++ ) pop( k ); - move( itop, ilast ); - } -} - -void -Mesher::addLower() -{ - register int ilast = itop; - - if( lastedge == 1 ) { - if( equal( 1, 0) ) { - swapMesh(); - output( ilast ); - for( register int i = 2; i < ilast; i++ ) { - output( i ); - swapMesh(); - } - copy( ilast-1, ilast ); - } else if( equal( ilast-1, ilast-2) ) { - output( ilast ); - swapMesh(); - for( register int i = ilast-3; i >= 0; i-- ) { - swapMesh(); - output( i ); - } - copy( ilast, 0 ); - } else { - closeMesh(); openMesh(); - output( 0 ); - output( ilast ); - for( register int i = 1; i < ilast; i++ ) { - output( i ); - swapMesh(); - } - copy( ilast-1, ilast ); - } - - lastedge = 0; - //for( register long k=0; k<ilast-1; k++ ) pop( k ); - move( 0, ilast-1 ); - move( 1, ilast ); - itop = 1; - } else { - if( ! isCw( ilast ) ) return; - do { - itop--; - } while( (itop > 1) && isCw( ilast ) ); - - if( equal( ilast-2, ilast-1) ) { - swapMesh(); - output( ilast ); - for( register int i=ilast-3; i>=itop-1; i--) { - output( i ); - swapMesh( ); - } - copy( itop-1, ilast ); - } else if( equal( itop-1, itop) ) { - output( ilast ); - swapMesh(); - for( register int i=itop+1; i<ilast; i++ ) { - swapMesh( ); - output( i ); - } - copy( ilast, ilast-1 ); - } else { - closeMesh(); openMesh(); - output( ilast-1 ); - output( ilast ); - for( register int i=ilast-2; i>=itop-1; i-- ) { - output( i ); - swapMesh( ); - } - copy( itop-1, ilast ); - } - //for( register int k=itop; k<ilast; k++ ) pop( k ); - move( itop, ilast ); - } -} - - |