FreeWRL / FreeX3D 4.3.0
glcurveval.h
1/*
2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice including the dates of first publication and
13 * either this permission notice or a reference to
14 * http://oss.sgi.com/projects/FreeB/
15 * shall be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Except as contained in this notice, the name of Silicon Graphics, Inc.
26 * shall not be used in advertising or otherwise to promote the sale, use or
27 * other dealings in this Software without prior written authorization from
28 * Silicon Graphics, Inc.
29 */
30
31/*
32 * glcurveval.h
33 *
34 */
35
36#ifndef __gluglcurveval_h_
37#define __gluglcurveval_h_
38
39#include "gluos.h"
40//#include <GL/gl.h>
41//#include <GL/glu.h>
42#include <libnurbs2.h>
43#include "basiccrveval.h"
44
45class CurveMap;
46
47/*for internal evaluator callback stuff*/
48#ifndef IN_MAX_BEZIER_ORDER
49#define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/
50#endif
51
52#ifndef IN_MAX_DIMENSION
53#define IN_MAX_DIMENSION 4
54#endif
55
56typedef struct curveEvalMachine{
57 REAL uprime; //cached previously evaluated uprime
58 int k; //the dimension
59 REAL u1;
60 REAL u2;
61 int ustride;
62 int uorder;
63 REAL ctlpoints[IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
64 REAL ucoeff[IN_MAX_BEZIER_ORDER];//cache the polynomial values
66
68public:
70 virtual ~OpenGLCurveEvaluator(void);
71 void range1f(long, REAL *, REAL *);
72 void domain1f(REAL, REAL);
73 void addMap(CurveMap *);
74
75 void enable(long);
76 void disable(long);
77 void bgnmap1f(long);
78 void map1f(long, REAL, REAL, long, long, REAL *);
79 void mapgrid1f(long, REAL, REAL);
80 void mapmesh1f(long, long, long);
81 void evalpoint1i(long);
82 void evalcoord1f(long, REAL);
83 void endmap1f(void);
84
85 void bgnline(void);
86 void endline(void);
87
88 void put_vertices_call_back(int flag)
89 {
90 output_triangles = flag;
91 }
92#ifdef _WIN32
93 void putCallBack(GLenum which, void (GLAPIENTRY *fn)() );
94#else
95 void putCallBack(GLenum which, _GLUfuncptr fn );
96#endif
97 void set_callback_userData(void *data)
98 {
99 userData = data;
100 }
101
102/*------------------begin for curveEvalMachine------------*/
103curveEvalMachine em_vertex;
104curveEvalMachine em_normal;
105curveEvalMachine em_color;
106curveEvalMachine em_texcoord;
107int vertex_flag; //whether there is a vertex map or not
108int normal_flag; //whether there is a normal map or not
109int color_flag; //whether there is a color map or not
110int texcoord_flag; //whether there is a texture map or not
111
112REAL global_grid_u0;
113REAL global_grid_u1;
114int global_grid_nu;
115
116void inMap1f(int which, //0: vert, 1: norm, 2: color, 3: tex
117 int dimension,
118 REAL ulower,
119 REAL uupper,
120 int ustride,
121 int uorder,
122 REAL *ctlpoints);
123
124void inPreEvaluate(int order, REAL vprime, REAL *coeff);
125void inDoDomain1(curveEvalMachine *em, REAL u, REAL *retPoint);
126void inDoEvalCoord1(REAL u);
127void inMapMesh1f(int umin, int umax);
128
129void (GLAPIENTRY *beginCallBackN) (GLenum type);
130void (GLAPIENTRY *endCallBackN) (void);
131void (GLAPIENTRY *vertexCallBackN) (const GLfloat *vert);
132void (GLAPIENTRY *normalCallBackN) (const GLfloat *normal);
133void (GLAPIENTRY *colorCallBackN) (const GLfloat *color);
134void (GLAPIENTRY *texcoordCallBackN) (const GLfloat *texcoord);
135
136void (GLAPIENTRY *beginCallBackData) (GLenum type, void* data);
137void (GLAPIENTRY *endCallBackData) (void* data);
138void (GLAPIENTRY *vertexCallBackData) (const GLfloat *vert, void* data);
139void (GLAPIENTRY *normalCallBackData) (const GLfloat *normal, void* data);
140void (GLAPIENTRY *colorCallBackData) (const GLfloat *color, void* data);
141void (GLAPIENTRY *texcoordCallBackData) (const GLfloat *texcoord, void* data);
142
143void* userData; //the opaque pointer for Data callback functions
144void beginCallBack(GLenum type, void* data);
145void endCallBack(void* data);
146void vertexCallBack(const GLfloat *vert, void *data);
147void normalCallBack(const GLfloat *normal, void* data);
148void colorCallBack(const GLfloat *color, void* data);
149void texcoordCallBack(const GLfloat *texcoord, void* data);
150
151
152/*------------------end for curveEvalMachine------------*/
153
154private:
155 int output_triangles; //true 1; false 0
156};
157
158#endif /* __gluglcurveval_h_ */