00001 /* 00002 ** SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) 00003 ** Copyright (C) [dates of first publication] Silicon Graphics, Inc. 00004 ** All Rights Reserved. 00005 ** 00006 ** Permission is hereby granted, free of charge, to any person obtaining a copy 00007 ** of this software and associated documentation files (the "Software"), to deal 00008 ** in the Software without restriction, including without limitation the rights 00009 ** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 00010 ** of the Software, and to permit persons to whom the Software is furnished to do so, 00011 ** subject to the following conditions: 00012 ** 00013 ** The above copyright notice including the dates of first publication and either this 00014 ** permission notice or a reference to http://oss.sgi.com/projects/FreeB/ shall be 00015 ** included in all copies or substantial portions of the Software. 00016 ** 00017 ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 00018 ** INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 00019 ** PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL SILICON GRAPHICS, INC. 00020 ** BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 00021 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE 00022 ** OR OTHER DEALINGS IN THE SOFTWARE. 00023 ** 00024 ** Except as contained in this notice, the name of Silicon Graphics, Inc. shall not 00025 ** be used in advertising or otherwise to promote the sale, use or other dealings in 00026 ** this Software without prior written authorization from Silicon Graphics, Inc. 00027 */ 00028 /* 00029 ** Author: Eric Veach, July 1994. 00030 */ 00031 00032 #ifndef TESS_H 00033 #define TESS_H 00034 00035 #include <setjmp.h> 00036 #include "bucketalloc.h" 00037 #include "mesh.h" 00038 #include "dict.h" 00039 #include "priorityq.h" 00040 #include "tesselator.h" 00041 00042 #ifdef __cplusplus 00043 extern "C" { 00044 #endif 00045 00046 //typedef struct TESStesselator TESStesselator; 00047 00048 struct TESStesselator { 00049 00050 /*** state needed for collecting the input data ***/ 00051 TESSmesh *mesh; /* stores the input contours, and eventually 00052 the tessellation itself */ 00053 int outOfMemory; 00054 00055 /*** state needed for projecting onto the sweep plane ***/ 00056 00057 TESSreal normal[3]; /* user-specified normal (if provided) */ 00058 TESSreal sUnit[3]; /* unit vector in s-direction (debugging) */ 00059 TESSreal tUnit[3]; /* unit vector in t-direction (debugging) */ 00060 00061 TESSreal bmin[2]; 00062 TESSreal bmax[2]; 00063 00064 /*** state needed for the line sweep ***/ 00065 int windingRule; /* rule for determining polygon interior */ 00066 00067 Dict *dict; /* edge dictionary for sweep line */ 00068 PriorityQ *pq; /* priority queue of vertex events */ 00069 TESSvertex *event; /* current sweep event being processed */ 00070 00071 struct BucketAlloc* regionPool; 00072 00073 void (*callCombine)( TESSreal coords[3], TESSreal weight[4] ); 00074 00075 TESSreal *vertices; 00076 int vertexCount; 00077 TESSindex *elements; 00078 int elementCount; 00079 00080 TESSalloc alloc; 00081 00082 jmp_buf env; /* place to jump to when memAllocs fail */ 00083 }; 00084 00085 #ifdef __cplusplus 00086 }; 00087 #endif 00088 00089 #endif