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/* $Id: tess.h,v 1.16 1999/12/06 09:39:34 gareth Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.1
*
* Copyright (C) 1999 Brian Paul 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 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.
*/
/*****************************************************************************
*
* GLU 1.3 Polygon Tessellation by Gareth Hughes <garethh@bell-labs.com>
*
*****************************************************************************/
#ifndef __GLU_TESS_H__
#define __GLU_TESS_H__
#include <stdarg.h>
#include <stdio.h>
#include "gluP.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
/*****************************************************************************
* The GLUtesselator structure:
*****************************************************************************/
struct GLUtesselator
{
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;
};
/*****************************************************************************
* Common tessellation functions:
*****************************************************************************/
extern void tess_error_callback( GLUtesselator *, GLenum );
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 );
extern void contour_dump( tess_contour_t *contour );
/*****************************************************************************
* Debugging output:
*****************************************************************************/
#ifdef DEBUG
extern int tess_dbg_level;
#define DBG_LEVEL_BASE 1
#define DBG_LEVEL_VERBOSE 10
#define DBG_LEVEL_ENTEREXIT 20
#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__ */
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