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/* $Id: tess.h,v 1.1 1999/08/19 00:55:42 jtg Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.1
* Copyright (C) 1995-1998 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.
*/
/*
* $Log: tess.h,v $
* Revision 1.1 1999/08/19 00:55:42 jtg
* Initial revision
*
* Revision 1.5 1999/02/27 13:55:31 brianp
* fixed BeOS-related GLU typedef problems
*
* Revision 1.4 1999/01/03 03:23:15 brianp
* now using GLAPIENTRY and GLCALLBACK keywords (Ted Jump)
*
* Revision 1.3 1997/10/29 02:02:20 brianp
* various MS Windows compiler changes (David Bucciarelli, v20 3dfx driver)
*
* Revision 1.2 1997/05/24 13:30:58 brianp
* added TESS_H multi-inclusion prevention test
*
* Revision 1.1 1996/09/27 01:19:39 brianp
* Initial revision
*
*/
/*
* This file is part of the polygon tesselation code contributed by
* Bogdan Sikorski
*/
#ifndef TESS_H
#define TESS_H
#include "gluP.h"
#define EPSILON 1e-06 /* epsilon for double precision compares */
typedef enum
{
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;
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;
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 GLUtesselator
{
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;
};
extern void tess_call_user_error(GLUtriangulatorObj *,GLenum);
#endif
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