reverted to old tessellator (GLU 1.1)

1 files changed, 83 insertions, 106 deletions

diff --git a/src/glu/mesa/tess.h b/src/glu/mesa/tess.h
index 5568183073..ddb9b30cb2 100644
--- a/src/glu/mesa/tess.h
+++ b/src/glu/mesa/tess.h
@@ -1,131 +1,108 @@
-/* $Id: tess.h,v 1.16 1999/12/06 09:39:34 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.
  */
 
-/*****************************************************************************
- *
- * GLU 1.3 Polygon Tessellation by Gareth Hughes <garethh@bell-labs.com>
- *
- *****************************************************************************/
 
-#ifndef __GLU_TESS_H__
-#define __GLU_TESS_H__
+/*
+ * This file is part of the polygon tesselation code contributed by
+ * Bogdan Sikorski
+ */
 
-#include <stdarg.h>
-#include <stdio.h>
 
-#include "gluP.h"
+#ifndef TESS_H
+#define TESS_H
 
-#include "tess_typedefs.h"
-#include "tess_macros.h"
-#include "tess_hash.h"
-#include "tess_heap.h"
-#if 0
-#include "tess_grid.h"
-#endif
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include "gluP.h"
+
+#define EPSILON 1e-06		/* epsilon for double precision compares */
 
-/*****************************************************************************
- * The GLUtesselator structure:
- *****************************************************************************/
-struct GLUtesselator
+typedef enum
 {
-    tess_callbacks_t	callbacks;
-    GLenum		winding_rule;
-    GLboolean		boundary_only;
-    GLdouble		tolerance;
-    GLenum		orientation;
-    void		*data;
-    GLint		num_contours;
-    tess_contour_t	*contours, *last_contour;
-    tess_contour_t	*current_contour;
-    GLdouble		mins[2], maxs[2];
-    GLint		num_vertices;
-    tess_vertex_t	**sorted_vertices;
-#if 0
-    tess_grid_t		*grid;			/* Not currently used... */
-#endif
-    heap_t		*ears;
-    GLboolean		edge_flag;
-    GLuint		label;
-    tess_plane_t	plane;
-    GLenum		error;
-};
+   OXY,
+   OYZ,
+   OXZ
+}
+projection_type;
 
+typedef struct callbacks_str
+{
+   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;
 
-/*****************************************************************************
- * Common tessellation functions:
- *****************************************************************************/
-extern void tess_error_callback( GLUtesselator *, GLenum );
+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;
 
-extern GLdouble twice_contour_area( tess_contour_t *contour );
-extern void reverse_contour( tess_contour_t *contour );
-extern void delete_contour( tess_contour_t **contour );
+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;
 
-extern void contour_dump( tess_contour_t *contour );
+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:
- *****************************************************************************/
-#ifdef DEBUG
-extern	int	tess_dbg_level;
 
-#define DBG_LEVEL_BASE		1
-#define DBG_LEVEL_VERBOSE	10
-#define DBG_LEVEL_ENTEREXIT	20
+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 *);
 
-#ifdef _WIN32
-#define DBG_STREAM	stdout
-#else
-#define DBG_STREAM	stderr
-#endif
 
-#ifdef __GNUC__
-#define MSG( level, format, args... )					\
-    if ( level <= tess_dbg_level ) {					\
-	fprintf( DBG_STREAM, "%9.9s:%d:\t ", __FILE__, __LINE__ );	\
-	fprintf( DBG_STREAM, format, ## args );				\
-	fflush( DBG_STREAM );						\
-    }
-#else
-#define MSG		tess_msg
-#endif /* __GNUC__ */
-
-#else
-#define MSG		tess_msg
-#endif /* DEBUG */
-
-extern INLINE void tess_msg( GLint level, char *format, ... );
-extern INLINE void tess_info( char *file, GLint line );
-
-#ifdef __cplusplus
-}
 #endif
-
-#endif /* __GLU_TESS_H__ */