summaryrefslogtreecommitdiff
path: root/src/glu/sgi/libnurbs/interface/glcurveval.cc
blob: 8c865084209cb032e9e55a3912f38acd387adfe5 (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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
/*
** License Applicability. Except to the extent portions of this file are
** made subject to an alternative license as permitted in the SGI Free
** Software License B, Version 1.1 (the "License"), the contents of this
** file are subject only to the provisions of the License. You may not use
** this file except in compliance with the License. You may obtain a copy
** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
**
** http://oss.sgi.com/projects/FreeB
**
** Note that, as provided in the License, the Software is distributed on an
** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
**
** Original Code. The Original Code is: OpenGL Sample Implementation,
** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
** Copyright in any portions created by third parties is as indicated
** elsewhere herein. All Rights Reserved.
**
** Additional Notice Provisions: The application programming interfaces
** established by SGI in conjunction with the Original Code are The
** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
** Window System(R) (Version 1.3), released October 19, 1998. This software
** was created using the OpenGL(R) version 1.2.1 Sample Implementation
** published by SGI, but has not been independently verified as being
** compliant with the OpenGL(R) version 1.2.1 Specification.
*/

/*
 * glcurveval.c++
 *
 * $Date: 2003/04/30 15:20:37 $ $Revision: 1.5 $
 * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/interface/glcurveval.cc,v 1.5 2003/04/30 15:20:37 brianp Exp $
 */

/* Polynomial Evaluator Interface */

#include "gluos.h"
#include "glimports.h"
#include "glrenderer.h"
#include "glcurveval.h"
#include "nurbsconsts.h"
 
OpenGLCurveEvaluator::OpenGLCurveEvaluator(void) 
{
  //no default callback functions
  beginCallBackN = NULL;
  endCallBackN = NULL;
  vertexCallBackN = NULL;
  normalCallBackN = NULL;
  colorCallBackN = NULL;
  texcoordCallBackN = NULL;
  beginCallBackData = NULL;
  endCallBackData = NULL;
  vertexCallBackData = NULL;
  normalCallBackData = NULL;
  colorCallBackData = NULL;
  texcoordCallBackData = NULL;

  userData = NULL;
  
  vertex_flag = 0;
  normal_flag = 0;
  color_flag = 0;
  texcoord_flag = 0;

  em_vertex.uprime = -1.0;
  em_normal.uprime = -1.0;
  em_color.uprime = -1.0;
  em_texcoord.uprime = -1.0;
}

OpenGLCurveEvaluator::~OpenGLCurveEvaluator(void) 
{ 
}

/* added nonsense to avoid the warning messages at compile time */
void
OpenGLCurveEvaluator::addMap(CurveMap *m)
{
	m = m;
}

void
OpenGLCurveEvaluator::range1f(long type, REAL *from, REAL *to)
{
	type = type;
	from = from;
	to = to;
}

void
OpenGLCurveEvaluator::domain1f(REAL ulo, REAL uhi)
{
	ulo = ulo;
	uhi = uhi;
}

void
OpenGLCurveEvaluator::bgnline(void)
{
  if(output_triangles)
    beginCallBack(GL_LINE_STRIP, userData);
  else
    glBegin((GLenum) GL_LINE_STRIP);
}

void
OpenGLCurveEvaluator::endline(void)
{
  if(output_triangles)
    endCallBack(userData);
  else
    glEnd();
}

/*---------------------------------------------------------------------------
 * disable - turn off a curve map
 *---------------------------------------------------------------------------
 */
void
OpenGLCurveEvaluator::disable(long type)
{
    glDisable((GLenum) type);
}

/*---------------------------------------------------------------------------
 * enable - turn on a curve map
 *---------------------------------------------------------------------------
 */
void
OpenGLCurveEvaluator::enable(long type)
{
    glEnable((GLenum) type);
}

/*-------------------------------------------------------------------------
 * mapgrid1f - define a lattice of points with origin and offset
 *-------------------------------------------------------------------------
 */
void 
OpenGLCurveEvaluator::mapgrid1f(long nu, REAL u0, REAL u1)
{
  if(output_triangles)
    {
      global_grid_u0 = u0;
      global_grid_u1 = u1;
      global_grid_nu = (int) nu;
    }
  else
    glMapGrid1f((GLint) nu, (GLfloat) u0, (GLfloat) u1);
}

/*-------------------------------------------------------------------------
 * bgnmap1 - preamble to curve definition and evaluations
 *-------------------------------------------------------------------------
 */
void
OpenGLCurveEvaluator::bgnmap1f(long)
{
  if(output_triangles)
    {
      //initialized so that no maps are set initially
      vertex_flag = 0;
      normal_flag = 0;
      color_flag = 0;
      texcoord_flag = 0;
      //no need to worry about gl states when doing callback
    }
  else
    glPushAttrib((GLbitfield) GL_EVAL_BIT);
}

/*-------------------------------------------------------------------------
 * endmap1 - postamble to a curve map
 *-------------------------------------------------------------------------
 */
void
OpenGLCurveEvaluator::endmap1f(void)
{
  if(output_triangles)
    {
      
    }
  else
    glPopAttrib();
}

/*-------------------------------------------------------------------------
 * map1f - pass a desription of a curve map
 *-------------------------------------------------------------------------
 */
void
OpenGLCurveEvaluator::map1f(
    long type,		 	/* map type */
    REAL ulo,			/* lower parametric bound */
    REAL uhi,			/* upper parametric bound */
    long stride, 		/* distance to next point in REALS */
    long order,			/* parametric order */
    REAL *pts 			/* control points */
)
{
  if(output_triangles)
    {
      int dimension;
      int which;
      switch(type){
      case GL_MAP1_VERTEX_3:
	which = 0;
	dimension = 3;
	break;
      case GL_MAP1_VERTEX_4:
	which=0;
	dimension = 4;
	break;
      case GL_MAP1_INDEX:
	which=2;
	dimension = 1;
	break;
      case GL_MAP1_COLOR_4:
	which=2;
	dimension = 4;
	break;
      case GL_MAP1_NORMAL:
	which=1;
	dimension = 3;
	break;
      case GL_MAP1_TEXTURE_COORD_1:
	which=3;
	dimension = 1;
	break;
      case GL_MAP1_TEXTURE_COORD_2:
	which=3;
	dimension = 2;
	break;
	
      case GL_MAP1_TEXTURE_COORD_3:
	which=3;
	dimension = 3;
	break;
      case GL_MAP1_TEXTURE_COORD_4:
	which=3;
	dimension = 4;
	break;	
      }
      inMap1f(which, dimension, ulo, uhi, stride, order, pts); 	      
    }       
  else
    glMap1f((GLenum) type, (GLfloat) ulo, (GLfloat) uhi, (GLint) stride, 
	    (GLint) order, (const GLfloat *) pts);
}

/*-------------------------------------------------------------------------
 * mapmesh1f - evaluate a mesh of points on lattice
 *-------------------------------------------------------------------------
 */
void OpenGLCurveEvaluator::mapmesh1f(long style, long from, long to)
{
  if(output_triangles)
    {
      inMapMesh1f((int) from, (int) to);      
    }
  else
    {
      switch(style) {
      default:
      case N_MESHFILL:
      case N_MESHLINE:
	glEvalMesh1((GLenum) GL_LINE, (GLint) from, (GLint) to);
	break;
      case N_MESHPOINT:
	glEvalMesh1((GLenum) GL_POINT, (GLint) from, (GLint) to);
	break;
      }
    }
}

/*-------------------------------------------------------------------------
 * evalpoint1i - evaluate a point on a curve
 *-------------------------------------------------------------------------
 */
void OpenGLCurveEvaluator::evalpoint1i(long i)
{
    glEvalPoint1((GLint) i);
}

/*-------------------------------------------------------------------------
 * evalcoord1f - evaluate a point on a curve
 *-------------------------------------------------------------------------
 */
void OpenGLCurveEvaluator::evalcoord1f(long, REAL u)
{
    glEvalCoord1f((GLfloat) u);
}

void
#ifdef _WIN32
OpenGLCurveEvaluator::putCallBack(GLenum which, void (GLAPIENTRY *fn)())
#else
OpenGLCurveEvaluator::putCallBack(GLenum which, _GLUfuncptr fn)
#endif
{
  switch(which)
  {
    case GLU_NURBS_BEGIN:
      beginCallBackN = (void (GLAPIENTRY *) (GLenum)) fn;
      break;
    case GLU_NURBS_END:
      endCallBackN = (void (GLAPIENTRY *) (void)) fn;
      break;
    case GLU_NURBS_VERTEX:
      vertexCallBackN = (void (GLAPIENTRY *) (const GLfloat*)) fn;
      break;
    case GLU_NURBS_NORMAL:
      normalCallBackN = (void (GLAPIENTRY *) (const GLfloat*)) fn;
      break;
    case GLU_NURBS_COLOR:
      colorCallBackN = (void (GLAPIENTRY *) (const GLfloat*)) fn;
      break;
    case GLU_NURBS_TEXTURE_COORD:
      texcoordCallBackN = (void (GLAPIENTRY *) (const GLfloat*)) fn;
      break;
    case GLU_NURBS_BEGIN_DATA:
      beginCallBackData = (void (GLAPIENTRY *) (GLenum, void*)) fn;
      break;
    case GLU_NURBS_END_DATA:
      endCallBackData = (void (GLAPIENTRY *) (void*)) fn;
      break;
    case GLU_NURBS_VERTEX_DATA:
      vertexCallBackData = (void (GLAPIENTRY *) (const GLfloat*, void*)) fn;
      break;
    case GLU_NURBS_NORMAL_DATA:
      normalCallBackData = (void (GLAPIENTRY *) (const GLfloat*, void*)) fn;
      break;
    case GLU_NURBS_COLOR_DATA:
      colorCallBackData = (void (GLAPIENTRY *) (const GLfloat*, void*)) fn;
      break;
    case GLU_NURBS_TEXTURE_COORD_DATA:
      texcoordCallBackData = (void (GLAPIENTRY *) (const GLfloat*, void*)) fn;
      break;
  }
}

void
OpenGLCurveEvaluator::beginCallBack(GLenum which, void *data)
{
  if(beginCallBackData)
    beginCallBackData(which, data);
  else if(beginCallBackN)
    beginCallBackN(which);
}

void
OpenGLCurveEvaluator::endCallBack(void *data)
{
  if(endCallBackData)
    endCallBackData(data);
  else if(endCallBackN)
    endCallBackN();
}

void
OpenGLCurveEvaluator::vertexCallBack(const GLfloat *vert, void* data)
{
  if(vertexCallBackData)
    vertexCallBackData(vert, data);
  else if(vertexCallBackN)
    vertexCallBackN(vert);
}


void
OpenGLCurveEvaluator::normalCallBack(const GLfloat *normal, void* data)
{
  if(normalCallBackData)
    normalCallBackData(normal, data);
  else if(normalCallBackN)
    normalCallBackN(normal);
}

void
OpenGLCurveEvaluator::colorCallBack(const GLfloat *color, void* data)
{
  if(colorCallBackData)
    colorCallBackData(color, data);
  else if(colorCallBackN)
    colorCallBackN(color);
}

void
OpenGLCurveEvaluator::texcoordCallBack(const GLfloat *texcoord, void* data)
{
  if(texcoordCallBackData)
    texcoordCallBackData(texcoord, data);
  else if(texcoordCallBackN)
    texcoordCallBackN(texcoord);
}