mirror of
https://github.com/brl/mutter.git
synced 2024-12-23 19:42:05 +00:00
633 lines
17 KiB
C
633 lines
17 KiB
C
/*
|
|
* 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 );
|
|
}
|