aboutsummaryrefslogtreecommitdiffstats
path: root/src/glu/mini/tess.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/glu/mini/tess.c')
-rw-r--r--src/glu/mini/tess.c327
1 files changed, 0 insertions, 327 deletions
diff --git a/src/glu/mini/tess.c b/src/glu/mini/tess.c
deleted file mode 100644
index 341d29bae3a..00000000000
--- a/src/glu/mini/tess.c
+++ /dev/null
@@ -1,327 +0,0 @@
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.3
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * This file is part of the polygon tesselation code contributed by
- * Bogdan Sikorski
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <math.h>
-#include <stdlib.h>
-#include "tess.h"
-#endif
-
-
-/*
- * This is ugly, but seems the easiest way to do things to make the
- * code work under YellowBox for Windows
- */
-#if defined(OPENSTEP) && defined(CALLBACK)
-#undef CALLBACK
-#define CALLBACK
-#endif
-
-
-static void delete_contours(GLUtriangulatorObj *);
-
-#ifdef __CYGWIN32__
-#define _CALLBACK
-#else
-#define _CALLBACK GLCALLBACK
-#endif
-
-
-static void
-init_callbacks(tess_callbacks * callbacks)
-{
- callbacks->begin = (void (_CALLBACK *) (GLenum)) 0;
- callbacks->edgeFlag = (void (_CALLBACK *) (GLboolean)) 0;
- callbacks->vertex = (void (_CALLBACK *) (void *)) 0;
- callbacks->end = (void (_CALLBACK *) (void)) 0;
- callbacks->error = (void (_CALLBACK *) (GLenum)) 0;
-}
-
-void
-tess_call_user_error(GLUtriangulatorObj * tobj, GLenum gluerr)
-{
- if (tobj->error == GLU_NO_ERROR)
- tobj->error = gluerr;
- if (tobj->callbacks.error != NULL)
- (tobj->callbacks.error) (gluerr);
-}
-
-GLUtriangulatorObj *GLAPIENTRY
-gluNewTess(void)
-{
- GLUtriangulatorObj *tobj;
-
- if ((tobj = (GLUtriangulatorObj *)
- malloc(sizeof(struct GLUtesselator))) == NULL)
- return NULL;
- tobj->contours = tobj->last_contour = NULL;
- init_callbacks(&tobj->callbacks);
- tobj->error = GLU_NO_ERROR;
- tobj->current_polygon = NULL;
- tobj->contour_cnt = 0;
- return tobj;
-}
-
-
-void GLAPIENTRY
-gluTessCallback(GLUtriangulatorObj * tobj, GLenum which,
- void (GLCALLBACK * fn) ())
-{
- switch (which) {
- case GLU_BEGIN:
- tobj->callbacks.begin = (void (_CALLBACK *) (GLenum)) fn;
- break;
- case GLU_EDGE_FLAG:
- tobj->callbacks.edgeFlag = (void (_CALLBACK *) (GLboolean)) fn;
- break;
- case GLU_VERTEX:
- tobj->callbacks.vertex = (void (_CALLBACK *) (void *)) fn;
- break;
- case GLU_END:
- tobj->callbacks.end = (void (_CALLBACK *) (void)) fn;
- break;
- case GLU_ERROR:
- tobj->callbacks.error = (void (_CALLBACK *) (GLenum)) fn;
- break;
- default:
- tobj->error = GLU_INVALID_ENUM;
- break;
- }
-}
-
-
-
-void GLAPIENTRY
-gluDeleteTess(GLUtriangulatorObj * tobj)
-{
- if (tobj->error == GLU_NO_ERROR && tobj->contour_cnt)
- /* was gluEndPolygon called? */
- tess_call_user_error(tobj, GLU_TESS_ERROR1);
- /* delete all internal structures */
- delete_contours(tobj);
- free(tobj);
-}
-
-
-void GLAPIENTRY
-gluBeginPolygon(GLUtriangulatorObj * tobj)
-{
-/*
- if(tobj->error!=GLU_NO_ERROR)
- return;
-*/
- tobj->error = GLU_NO_ERROR;
- if (tobj->current_polygon != NULL) {
- /* gluEndPolygon was not called */
- tess_call_user_error(tobj, GLU_TESS_ERROR1);
- /* delete all internal structures */
- delete_contours(tobj);
- }
- else {
- if ((tobj->current_polygon =
- (tess_polygon *) malloc(sizeof(tess_polygon))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return;
- }
- tobj->current_polygon->vertex_cnt = 0;
- tobj->current_polygon->vertices =
- tobj->current_polygon->last_vertex = NULL;
- }
-}
-
-
-void GLAPIENTRY
-gluEndPolygon(GLUtriangulatorObj * tobj)
-{
- /*tess_contour *contour_ptr; */
-
- /* there was an error */
- if (tobj->error != GLU_NO_ERROR)
- goto end;
-
- /* check if gluBeginPolygon was called */
- if (tobj->current_polygon == NULL) {
- tess_call_user_error(tobj, GLU_TESS_ERROR2);
- return;
- }
- tess_test_polygon(tobj);
- /* there was an error */
- if (tobj->error != GLU_NO_ERROR)
- goto end;
-
- /* any real contours? */
- if (tobj->contour_cnt == 0) {
- /* delete all internal structures */
- delete_contours(tobj);
- return;
- }
- tess_find_contour_hierarchies(tobj);
- /* there was an error */
- if (tobj->error != GLU_NO_ERROR)
- goto end;
-
- tess_handle_holes(tobj);
- /* there was an error */
- if (tobj->error != GLU_NO_ERROR)
- goto end;
-
- /* if no callbacks, nothing to do */
- if (tobj->callbacks.begin != NULL && tobj->callbacks.vertex != NULL &&
- tobj->callbacks.end != NULL) {
- if (tobj->callbacks.edgeFlag == NULL)
- tess_tesselate(tobj);
- else
- tess_tesselate_with_edge_flag(tobj);
- }
-
- end:
- /* delete all internal structures */
- delete_contours(tobj);
-}
-
-
-void GLAPIENTRY
-gluNextContour(GLUtriangulatorObj * tobj, GLenum type)
-{
- if (tobj->error != GLU_NO_ERROR)
- return;
- if (tobj->current_polygon == NULL) {
- tess_call_user_error(tobj, GLU_TESS_ERROR2);
- return;
- }
- /* first contour? */
- if (tobj->current_polygon->vertex_cnt)
- tess_test_polygon(tobj);
-}
-
-
-void GLAPIENTRY
-gluTessVertex(GLUtriangulatorObj * tobj, GLdouble v[3], void *data)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_vertex *last_vertex_ptr;
-
- if (tobj->error != GLU_NO_ERROR)
- return;
- if (polygon == NULL) {
- tess_call_user_error(tobj, GLU_TESS_ERROR2);
- return;
- }
- last_vertex_ptr = polygon->last_vertex;
- if (last_vertex_ptr == NULL) {
- if ((last_vertex_ptr = (tess_vertex *)
- malloc(sizeof(tess_vertex))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return;
- }
- polygon->vertices = last_vertex_ptr;
- polygon->last_vertex = last_vertex_ptr;
- last_vertex_ptr->data = data;
- last_vertex_ptr->location[0] = v[0];
- last_vertex_ptr->location[1] = v[1];
- last_vertex_ptr->location[2] = v[2];
- last_vertex_ptr->next = NULL;
- last_vertex_ptr->previous = NULL;
- ++(polygon->vertex_cnt);
- }
- else {
- tess_vertex *vertex_ptr;
-
- /* same point twice? */
- if (fabs(last_vertex_ptr->location[0] - v[0]) < EPSILON &&
- fabs(last_vertex_ptr->location[1] - v[1]) < EPSILON &&
- fabs(last_vertex_ptr->location[2] - v[2]) < EPSILON) {
- tess_call_user_error(tobj, GLU_TESS_ERROR6);
- return;
- }
- if ((vertex_ptr = (tess_vertex *)
- malloc(sizeof(tess_vertex))) == NULL) {
- tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
- return;
- }
- vertex_ptr->data = data;
- vertex_ptr->location[0] = v[0];
- vertex_ptr->location[1] = v[1];
- vertex_ptr->location[2] = v[2];
- vertex_ptr->next = NULL;
- vertex_ptr->previous = last_vertex_ptr;
- ++(polygon->vertex_cnt);
- last_vertex_ptr->next = vertex_ptr;
- polygon->last_vertex = vertex_ptr;
- }
-}
-
-
-static void
-delete_contours(GLUtriangulatorObj * tobj)
-{
- tess_polygon *polygon = tobj->current_polygon;
- tess_contour *contour, *contour_tmp;
- tess_vertex *vertex, *vertex_tmp;
-
- /* remove current_polygon list - if exists due to detected error */
- if (polygon != NULL) {
- if (polygon->vertices) {
- for (vertex = polygon->vertices; vertex != polygon->last_vertex;) {
- vertex_tmp = vertex->next;
- free(vertex);
- vertex = vertex_tmp;
- }
- free(vertex);
- }
- free(polygon);
- tobj->current_polygon = NULL;
- }
- /* remove all contour data */
- for (contour = tobj->contours; contour != NULL;) {
- for (vertex = contour->vertices; vertex != contour->last_vertex;) {
- vertex_tmp = vertex->next;
- free(vertex);
- vertex = vertex_tmp;
- }
- free(vertex);
- contour_tmp = contour->next;
- free(contour);
- contour = contour_tmp;
- }
- tobj->contours = tobj->last_contour = NULL;
- tobj->contour_cnt = 0;
-}
-
-
-void GLAPIENTRY
-gluTessNormal(GLUtesselator *tess, GLdouble valueX, GLdouble valueY, GLdouble valueZ)
-{
- /* dummy function */
- (void) tess;
- (void) valueX;
- (void) valueY;
- (void) valueZ;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 08:46:46 +0000