workbench/libs/mesa/src/glu/sgi/libnurbs/interface/glrenderer.cc

   1 /*
   2 ** License Applicability. Except to the extent portions of this file are
   3 ** made subject to an alternative license as permitted in the SGI Free
   4 ** Software License B, Version 1.1 (the "License"), the contents of this
   5 ** file are subject only to the provisions of the License. You may not use
   6 ** this file except in compliance with the License. You may obtain a copy
   7 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
   8 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
   9 **
  10 ** http://oss.sgi.com/projects/FreeB
  11 **
  12 ** Note that, as provided in the License, the Software is distributed on an
  13 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  14 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  15 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  16 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  17 **
  18 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  19 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  20 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  21 ** Copyright in any portions created by third parties is as indicated
  22 ** elsewhere herein. All Rights Reserved.
  23 **
  24 ** Additional Notice Provisions: The application programming interfaces
  25 ** established by SGI in conjunction with the Original Code are The
  26 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  27 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  28 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  29 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  30 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  31 ** published by SGI, but has not been independently verified as being
  32 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  33 **
  34 */
  35 /*
  36 */
  37
  38 #include "gluos.h"
  39 #include "glimports.h"
  40 #include "glrenderer.h"
  41
  42 GLUnurbs::GLUnurbs()
  43         : NurbsTessellator(curveEvaluator, surfaceEvaluator)
  44 {
  45     redefineMaps();
  46     defineMap(GL_MAP2_NORMAL, 0, 3);
  47     defineMap(GL_MAP1_NORMAL, 0, 3);
  48     defineMap(GL_MAP2_TEXTURE_COORD_1, 0, 1);
  49     defineMap(GL_MAP1_TEXTURE_COORD_1, 0, 1);
  50     defineMap(GL_MAP2_TEXTURE_COORD_2, 0, 2);
  51     defineMap(GL_MAP1_TEXTURE_COORD_2, 0, 2);
  52     defineMap(GL_MAP2_TEXTURE_COORD_3, 0, 3);
  53     defineMap(GL_MAP1_TEXTURE_COORD_3, 0, 3);
  54     defineMap(GL_MAP2_TEXTURE_COORD_4, 1, 4);
  55     defineMap(GL_MAP1_TEXTURE_COORD_4, 1, 4);
  56     defineMap(GL_MAP2_VERTEX_4, 1, 4);
  57     defineMap(GL_MAP1_VERTEX_4, 1, 4);
  58     defineMap(GL_MAP2_VERTEX_3, 0, 3);
  59     defineMap(GL_MAP1_VERTEX_3, 0, 3);
  60     defineMap(GL_MAP2_COLOR_4, 0, 4);
  61     defineMap(GL_MAP1_COLOR_4, 0, 4);
  62     defineMap(GL_MAP2_INDEX, 0, 1);
  63     defineMap(GL_MAP1_INDEX, 0, 1);
  64
  65     setnurbsproperty(GL_MAP1_VERTEX_3, N_SAMPLINGMETHOD, (float) N_PATHLENGTH);
  66     setnurbsproperty(GL_MAP1_VERTEX_4, N_SAMPLINGMETHOD, (float) N_PATHLENGTH);
  67     setnurbsproperty(GL_MAP2_VERTEX_3, N_SAMPLINGMETHOD, (float) N_PATHLENGTH);
  68     setnurbsproperty(GL_MAP2_VERTEX_4, N_SAMPLINGMETHOD, (float) N_PATHLENGTH);
  69
  70     setnurbsproperty(GL_MAP1_VERTEX_3, N_PIXEL_TOLERANCE, (float) 50.0);
  71     setnurbsproperty(GL_MAP1_VERTEX_4, N_PIXEL_TOLERANCE, (float) 50.0);
  72     setnurbsproperty(GL_MAP2_VERTEX_3, N_PIXEL_TOLERANCE, (float) 50.0);
  73     setnurbsproperty(GL_MAP2_VERTEX_4, N_PIXEL_TOLERANCE, (float) 50.0);
  74
  75     setnurbsproperty(GL_MAP1_VERTEX_3, N_ERROR_TOLERANCE, (float) 0.50);
  76     setnurbsproperty(GL_MAP1_VERTEX_4, N_ERROR_TOLERANCE, (float) 0.50);
  77     setnurbsproperty(GL_MAP2_VERTEX_3, N_ERROR_TOLERANCE, (float) 0.50);
  78     setnurbsproperty(GL_MAP2_VERTEX_4, N_ERROR_TOLERANCE, (float) 0.50);
  79
  80     setnurbsproperty(GL_MAP1_VERTEX_3, N_S_STEPS, (float) 100.0);
  81     setnurbsproperty(GL_MAP1_VERTEX_4, N_S_STEPS, (float) 100.0);
  82     setnurbsproperty(GL_MAP2_VERTEX_3, N_S_STEPS, (float) 100.0);
  83     setnurbsproperty(GL_MAP2_VERTEX_4, N_S_STEPS, (float) 100.0);
  84
  85     //added for optimizing untrimmed case
  86     set_domain_distance_u_rate(100.0);
  87
  88     setnurbsproperty(GL_MAP1_VERTEX_3, N_T_STEPS, (float) 100.0);
  89     setnurbsproperty(GL_MAP1_VERTEX_4, N_T_STEPS, (float) 100.0);
  90     setnurbsproperty(GL_MAP2_VERTEX_3, N_T_STEPS, (float) 100.0);
  91     setnurbsproperty(GL_MAP2_VERTEX_4, N_T_STEPS, (float) 100.0);
  92
  93     //added for optimizing untrimmed case
  94     set_domain_distance_v_rate(100.0);
  95     set_is_domain_distance_sampling(0); //since the default is path_length
  96
  97     //default autoloadmode is true
  98     autoloadmode = 1;
  99
 100     //default callbackFlag is 0
 101     callbackFlag = 0;
 102
 103     errorCallback = NULL;
 104 }
 105
 106 void
 107 GLUnurbs::bgnrender(void)
 108 {
 109     if (autoloadmode) {
 110         loadGLMatrices();
 111     }
 112 }
 113
 114 void
 115 GLUnurbs::endrender(void)
 116 {
 117 }
 118
 119 void
 120 GLUnurbs::errorHandler(int i)
 121 {
 122     int gluError;
 123
 124     gluError = i + (GLU_NURBS_ERROR1 - 1);
 125     postError( gluError );
 126 }
 127
 128 void
 129 GLUnurbs::loadGLMatrices(void)
 130 {
 131     GLfloat vmat[4][4];
 132     GLint viewport[4];
 133
 134     grabGLMatrix((GLfloat (*)[4]) vmat);
 135     loadCullingMatrix((GLfloat (*)[4]) vmat);
 136     ::glGetIntegerv((GLenum) GL_VIEWPORT, (GLint *) viewport);
 137     loadSamplingMatrix((const GLfloat (*)[4]) vmat, (const GLint *) viewport);
 138 }
 139
 140 void
 141 GLUnurbs::useGLMatrices(const GLfloat modelMatrix[16],
 142                           const GLfloat projMatrix[16],
 143                           const GLint viewport[4])
 144 {
 145     GLfloat vmat[4][4];
 146
 147     multmatrix4d(vmat, (const GLfloat (*)[4]) modelMatrix,
 148             (const GLfloat (*)[4]) projMatrix);
 149     loadCullingMatrix((GLfloat (*)[4]) vmat);
 150     loadSamplingMatrix((const GLfloat (*)[4]) vmat, (const GLint *) viewport);
 151 }
 152
 153 /*--------------------------------------------------------------------------
 154  * grabGLMatrix
 155  *--------------------------------------------------------------------------
 156  */
 157
 158 void
 159 GLUnurbs::grabGLMatrix(GLfloat vmat[4][4])
 160 {
 161     GLfloat m1[4][4], m2[4][4];
 162
 163     ::glGetFloatv((GLenum) GL_MODELVIEW_MATRIX, (GLfloat *) &(m1[0][0]));
 164     ::glGetFloatv((GLenum) GL_PROJECTION_MATRIX, (GLfloat *) &(m2[0][0]));
 165     multmatrix4d((GLfloat (*)[4]) vmat,
 166             (const GLfloat (*)[4]) m1, (const GLfloat (*)[4]) m2);
 167 }
 168
 169 //for object space tesselation: view independent
 170 void
 171 GLUnurbs::setSamplingMatrixIdentity( void )
 172 {
 173   INREAL smat[4][4] = {
 174     {1,0,0,0},
 175     {0,1,0,0},
 176     {0,0,1,0},
 177     {0,0,0,1}
 178   };
 179   const long rstride = sizeof(smat[0]) / sizeof(smat[0][0]);
 180   const long cstride = 1;
 181
 182   setnurbsproperty(GL_MAP1_VERTEX_3, N_SAMPLINGMATRIX, &smat[0][0], rstride,
 183                    cstride);
 184   setnurbsproperty(GL_MAP1_VERTEX_4, N_SAMPLINGMATRIX, &smat[0][0], rstride,
 185                    cstride);
 186   setnurbsproperty(GL_MAP2_VERTEX_3, N_SAMPLINGMATRIX, &smat[0][0], rstride,
 187                    cstride);
 188   setnurbsproperty(GL_MAP2_VERTEX_4, N_SAMPLINGMATRIX, &smat[0][0], rstride,
 189                    cstride);
 190 }
 191
 192
 193 void
 194 GLUnurbs::loadSamplingMatrix(const GLfloat vmat[4][4],
 195                                const GLint viewport[4])
 196 {
 197
 198     /* rescale the mapping to correspond to pixels in x/y */
 199     REAL xsize = 0.5 * (REAL) (viewport[2]);
 200     REAL ysize = 0.5 * (REAL) (viewport[3]);
 201
 202     INREAL smat[4][4];
 203     smat[0][0] = vmat[0][0] * xsize;
 204     smat[1][0] = vmat[1][0] * xsize;
 205     smat[2][0] = vmat[2][0] * xsize;
 206     smat[3][0] = vmat[3][0] * xsize;
 207
 208     smat[0][1] = vmat[0][1] * ysize;
 209     smat[1][1] = vmat[1][1] * ysize;
 210     smat[2][1] = vmat[2][1] * ysize;
 211     smat[3][1] = vmat[3][1] * ysize;
 212
 213     smat[0][2] = 0.0;
 214     smat[1][2] = 0.0;
 215     smat[2][2] = 0.0;
 216     smat[3][2] = 0.0;
 217
 218     smat[0][3] = vmat[0][3];
 219     smat[1][3] = vmat[1][3];
 220     smat[2][3] = vmat[2][3];
 221     smat[3][3] = vmat[3][3];
 222
 223     const long rstride = sizeof(smat[0]) / sizeof(smat[0][0]);
 224     const long cstride = 1;
 225
 226     setnurbsproperty(GL_MAP1_VERTEX_3, N_SAMPLINGMATRIX, &smat[0][0], rstride,
 227             cstride);
 228     setnurbsproperty(GL_MAP1_VERTEX_4, N_SAMPLINGMATRIX, &smat[0][0], rstride,
 229             cstride);
 230     setnurbsproperty(GL_MAP2_VERTEX_3, N_SAMPLINGMATRIX, &smat[0][0], rstride,
 231             cstride);
 232     setnurbsproperty(GL_MAP2_VERTEX_4, N_SAMPLINGMATRIX, &smat[0][0], rstride,
 233             cstride);
 234 }
 235
 236 void
 237 GLUnurbs::loadCullingMatrix(GLfloat vmat[4][4])
 238 {
 239     INREAL cmat[4][4];
 240
 241     cmat[0][0] = vmat[0][0];
 242     cmat[0][1] = vmat[0][1];
 243     cmat[0][2] = vmat[0][2];
 244     cmat[0][3] = vmat[0][3];
 245
 246     cmat[1][0] = vmat[1][0];
 247     cmat[1][1] = vmat[1][1];
 248     cmat[1][2] = vmat[1][2];
 249     cmat[1][3] = vmat[1][3];
 250
 251     cmat[2][0] = vmat[2][0];
 252     cmat[2][1] = vmat[2][1];
 253     cmat[2][2] = vmat[2][2];
 254     cmat[2][3] = vmat[2][3];
 255
 256     cmat[3][0] = vmat[3][0];
 257     cmat[3][1] = vmat[3][1];
 258     cmat[3][2] = vmat[3][2];
 259     cmat[3][3] = vmat[3][3];
 260
 261     const long rstride = sizeof(cmat[0]) / sizeof(cmat[0][0]);
 262     const long cstride = 1;
 263
 264     setnurbsproperty(GL_MAP2_VERTEX_3, N_CULLINGMATRIX, &cmat[0][0], rstride,
 265             cstride);
 266     setnurbsproperty(GL_MAP2_VERTEX_4, N_CULLINGMATRIX, &cmat[0][0], rstride,
 267             cstride);
 268         //added for curves by zl
 269     setnurbsproperty(GL_MAP1_VERTEX_3, N_CULLINGMATRIX, &cmat[0][0], rstride,
 270             cstride);
 271     setnurbsproperty(GL_MAP1_VERTEX_4, N_CULLINGMATRIX, &cmat[0][0], rstride,
 272             cstride);
 273 }
 274
 275 /*---------------------------------------------------------------------
 276  * A = B * MAT ; transform a 4d vector through a 4x4 matrix
 277  *---------------------------------------------------------------------
 278  */
 279 void
 280 GLUnurbs::transform4d(GLfloat A[4], GLfloat B[4], GLfloat mat[4][4])
 281 {
 282
 283     A[0] = B[0]*mat[0][0] + B[1]*mat[1][0] + B[2]*mat[2][0] + B[3]*mat[3][0];
 284     A[1] = B[0]*mat[0][1] + B[1]*mat[1][1] + B[2]*mat[2][1] + B[3]*mat[3][1];
 285     A[2] = B[0]*mat[0][2] + B[1]*mat[1][2] + B[2]*mat[2][2] + B[3]*mat[3][2];
 286     A[3] = B[0]*mat[0][3] + B[1]*mat[1][3] + B[2]*mat[2][3] + B[3]*mat[3][3];
 287 }
 288
 289 /*---------------------------------------------------------------------
 290  * new = [left][right] ; multiply two matrices together
 291  *---------------------------------------------------------------------
 292  */
 293 void
 294 GLUnurbs::multmatrix4d (GLfloat n[4][4], const GLfloat left[4][4],
 295                  const GLfloat right[4][4])
 296 {
 297     transform4d ((GLfloat *) n[0],(GLfloat *) left[0],(GLfloat (*)[4]) right);
 298     transform4d ((GLfloat *) n[1],(GLfloat *) left[1],(GLfloat (*)[4]) right);
 299     transform4d ((GLfloat *) n[2],(GLfloat *) left[2],(GLfloat (*)[4]) right);
 300     transform4d ((GLfloat *) n[3],(GLfloat *) left[3],(GLfloat (*)[4]) right);
 301 }