-/* $Id: tess.h,v 1.11 1999/10/11 17:49:22 gareth Exp $ */
+/* $Id: tess.h,v 1.17 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
+ * Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
*
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
+ * 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.
*
- * 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:
+ * 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.
*
- * The above copyright notice and this permission notice 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
- * BRIAN PAUL 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.
+ * 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.
*/
+
/*
- * $Log: tess.h,v $
- * Revision 1.11 1999/10/11 17:49:22 gareth
- * Correctly initialized GLUtesselator user data pointer.
- *
- * Revision 1.10 1999/10/11 17:28:05 gareth
- * Allow debugging output capture under Win32. This seems really
- * broken to me, but that's Windows for you...
- *
- * Revision 1.9 1999/10/03 00:56:07 gareth
- * Added tessellation winding rule support. Misc bug fixes.
- *
- * Revision 1.8 1999/09/17 06:31:02 gareth
- * Winding rule updates.
- *
- * Revision 1.7 1999/09/16 06:42:01 gareth
- * Misc winding rule bug fixes.
- *
- * Revision 1.6 1999/09/15 02:12:16 gareth
- * Added debugging pragma message.
- *
- * Revision 1.5 1999/09/14 22:46:02 gareth
- * Added debugging output.
- *
- * Revision 1.4 1999/09/13 22:20:13 gareth
- * Fixed file headers. Tracking down macro bugs.
- *
+ * This file is part of the polygon tesselation code contributed by
+ * Bogdan Sikorski
*/
-/*****************************************************************************
- *
- * GLU 1.3 Polygon Tessellation by Gareth Hughes <garethh@lucent.com>
- *
- *****************************************************************************/
-#ifndef __GLU_TESS_H__
-#define __GLU_TESS_H__
+#ifndef TESS_H
+#define TESS_H
-#include <stdarg.h>
-#include <stdio.h>
#include "gluP.h"
-#include "tess_typedefs.h"
-#include "tess_hash.h"
-#include "tess_heap.h"
-#if 0
-#include "tess_grid.h"
-#endif
+#define EPSILON 1e-06 /* epsilon for double precision compares */
-#ifdef __cplusplus
-extern "C" {
-#endif
+typedef enum
+{
+ OXY,
+ OYZ,
+ OXZ
+}
+projection_type;
-/*****************************************************************************
- * The GLUtesselator structure:
- *****************************************************************************/
-struct GLUtesselator
+typedef struct callbacks_str
{
- tess_callbacks_t callbacks;
- GLboolean boundary_only;
- GLenum winding_rule;
- GLdouble tolerance;
- tess_plane_t plane;
- GLuint contour_count;
- tess_contour_t *contours, *last_contour;
- tess_contour_t *current_contour;
- GLdouble mins[2], maxs[2];
- GLuint vertex_count;
- tess_vertex_t **sorted_vertices;
-#if 0
- tess_grid_t *grid; /* Not currently used... */
-#endif
- heap_t *ears;
- hashtable_t *cvc_lists;
- void *data;
- GLuint label;
- GLenum error;
-};
+ void (GLCALLBACK * begin) (GLenum mode);
+ void (GLCALLBACK * edgeFlag) (GLboolean flag);
+ void (GLCALLBACK * vertex) (GLvoid * v);
+ void (GLCALLBACK * end) (void);
+ void (GLCALLBACK * error) (GLenum err);
+}
+tess_callbacks;
+
+typedef struct vertex_str
+{
+ void *data;
+ GLdouble location[3];
+ GLdouble x, y;
+ GLboolean edge_flag;
+ struct vertex_str *shadow_vertex;
+ struct vertex_str *next, *previous;
+}
+tess_vertex;
+typedef struct contour_str
+{
+ GLenum type;
+ GLuint vertex_cnt;
+ GLdouble area;
+ GLenum orientation;
+ struct vertex_str *vertices, *last_vertex;
+ struct contour_str *next, *previous;
+}
+tess_contour;
-/*****************************************************************************
- * Tessellation error handler:
- *****************************************************************************/
-extern void tess_error_callback( GLUtesselator *, GLenum );
+typedef struct polygon_str
+{
+ GLuint vertex_cnt;
+ GLdouble A, B, C, D;
+ GLdouble area;
+ GLenum orientation;
+ struct vertex_str *vertices, *last_vertex;
+}
+tess_polygon;
+struct GLUtriangulatorObj
+{
+ tess_contour *contours, *last_contour;
+ GLuint contour_cnt;
+ tess_callbacks callbacks;
+ tess_polygon *current_polygon;
+ GLenum error;
+ GLdouble A, B, C, D;
+ projection_type projection;
+};
-/*****************************************************************************
- * Debugging output: (to be removed...)
- *****************************************************************************/
-#ifdef DEBUG
-extern int tess_debug_level;
-int vdebugstr( char *format_str, ... );
-#pragma message( "tess: using DEBUGP for debugging output" )
-#ifdef _WIN32
-#define DEBUG_STREAM stdout
-#else
-#define DEBUG_STREAM stderr
-#endif
-#define DEBUGP( level, body ) \
- do { \
- if ( tess_debug_level >= level ) { \
- vdebugstr( "%11.11s:%-5d ", __FILE__, __LINE__, level ); \
- vdebugstr body; \
- fflush( DEBUG_STREAM ); \
- } \
- } while ( 0 )
-#define DEBUGIF( level ) do { if ( tess_debug_level >= level ) {
-#define DEBUGENDIF } } while ( 0 )
-
-#else
-
-#define DEBUGP( level, body )
-#define DEBUGIF( level ) while(0) {
-#define DEBUGENDIF }
+extern void tess_call_user_error(GLUtriangulatorObj *, GLenum);
+extern void tess_test_polygon(GLUtriangulatorObj *);
+extern void tess_find_contour_hierarchies(GLUtriangulatorObj *);
+extern void tess_handle_holes(GLUtriangulatorObj *);
+extern void tess_tesselate(GLUtriangulatorObj *);
+extern void tess_tesselate_with_edge_flag(GLUtriangulatorObj *);
-#endif
-#ifdef __cplusplus
-}
#endif
-
-#endif /* __GLU_TESS_H__ */
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