aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/glu/sgi/libnurbs/interface/glcurveval.h
blob: 8fa493034b24eaffd8458dca62e5e0926bf513ce (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
/*
 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
 * Copyright (C) 1991-2000 Silicon Graphics, Inc. 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 including the dates of first publication and
 * either this permission notice or a reference to
 * http://oss.sgi.com/projects/FreeB/
 * 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
 * SILICON GRAPHICS, INC. 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.
 *
 * Except as contained in this notice, the name of Silicon Graphics, Inc.
 * shall not be used in advertising or otherwise to promote the sale, use or
 * other dealings in this Software without prior written authorization from
 * Silicon Graphics, Inc.
 */

/*
 * glcurveval.h
 *
 */

#ifndef __gluglcurveval_h_
#define __gluglcurveval_h_

#include "gluos.h"
#include <GL/gl.h>
#include <GL/glu.h>
#include "basiccrveval.h"

class CurveMap;

/*for internal evaluator callback stuff*/
#ifndef IN_MAX_BEZIER_ORDER
#define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/
#endif
			
#ifndef IN_MAX_DIMENSION
#define IN_MAX_DIMENSION 4 
#endif

typedef struct curveEvalMachine{
  REAL uprime; //cached previously evaluated uprime
  int k; //the dimension
  REAL u1;
  REAL u2;
  int ustride;
  int uorder;
  REAL ctlpoints[IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
  REAL ucoeff[IN_MAX_BEZIER_ORDER];//cache the polynomial values
} curveEvalMachine;

class OpenGLCurveEvaluator : public BasicCurveEvaluator  {  
public:
			OpenGLCurveEvaluator(void);
			virtual ~OpenGLCurveEvaluator(void);
    void		range1f(long, REAL *, REAL *);
    void		domain1f(REAL, REAL);
    void		addMap(CurveMap *);

    void		enable(long);
    void		disable(long);
    void		bgnmap1f(long);
    void		map1f(long, REAL, REAL, long, long, REAL *);
    void		mapgrid1f(long, REAL, REAL);
    void		mapmesh1f(long, long, long);
    void		evalpoint1i(long);
    void		evalcoord1f(long, REAL);
    void		endmap1f(void);

    void		bgnline(void);
    void		endline(void);

    void                put_vertices_call_back(int flag)
      {
	output_triangles = flag;
      }
#ifdef _WIN32
    void               putCallBack(GLenum which, void (GLAPIENTRY *fn)() );
#else
    void               putCallBack(GLenum which, _GLUfuncptr fn );
#endif
    void               set_callback_userData(void *data)
      {
	userData = data;
      }

/*------------------begin for curveEvalMachine------------*/
curveEvalMachine em_vertex;
curveEvalMachine em_normal;
curveEvalMachine em_color;
curveEvalMachine em_texcoord;
int vertex_flag; //whether there is a vertex map or not
int normal_flag; //whether there is a normal map or not
int color_flag; //whether there is a color map or not
int texcoord_flag; //whether there is a texture map or not

REAL global_grid_u0;
REAL global_grid_u1;
int global_grid_nu;

void inMap1f(int which, //0: vert, 1: norm, 2: color, 3: tex
	     int dimension,
	     REAL ulower,
	     REAL uupper,
	     int ustride,
	     int uorder,
	     REAL *ctlpoints);

void inPreEvaluate(int order, REAL vprime, REAL *coeff);
void inDoDomain1(curveEvalMachine *em, REAL u, REAL *retPoint);
void inDoEvalCoord1(REAL u);
void inMapMesh1f(int umin, int umax);

void     (GLAPIENTRY *beginCallBackN) (GLenum type);
void     (GLAPIENTRY *endCallBackN)   (void);
void     (GLAPIENTRY *vertexCallBackN) (const GLfloat *vert);
void     (GLAPIENTRY *normalCallBackN) (const GLfloat *normal);
void     (GLAPIENTRY *colorCallBackN) (const GLfloat *color);
void     (GLAPIENTRY *texcoordCallBackN) (const GLfloat *texcoord);

void     (GLAPIENTRY *beginCallBackData) (GLenum type, void* data);
void     (GLAPIENTRY *endCallBackData)   (void* data);
void     (GLAPIENTRY *vertexCallBackData) (const GLfloat *vert, void* data);
void     (GLAPIENTRY *normalCallBackData) (const GLfloat *normal, void* data);
void     (GLAPIENTRY *colorCallBackData) (const GLfloat *color, void* data);
void     (GLAPIENTRY *texcoordCallBackData) (const GLfloat *texcoord, void* data);

void* userData; //the opaque pointer for Data callback functions
void  beginCallBack(GLenum type, void* data);
void endCallBack(void* data);
void vertexCallBack(const GLfloat *vert, void *data);
void normalCallBack(const GLfloat *normal, void* data);
void colorCallBack(const  GLfloat *color, void* data);
void texcoordCallBack(const GLfloat *texcoord, void* data);


/*------------------end   for curveEvalMachine------------*/

private:
    int output_triangles; //true 1; false 0
};

#endif /* __gluglcurveval_h_ */