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IABSD.fr/xenocara/lib/libGLU/src/libnurbs/interface/glrenderer.cc
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- lib/libGLU/src/libnurbs/interface/glrenderer.cc
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/* ** 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. ** */ /* */ #include "gluos.h" #include "glimports.h" #include "glrenderer.h" GLUnurbs::GLUnurbs() : NurbsTessellator(curveEvaluator, surfaceEvaluator) { redefineMaps(); defineMap(GL_MAP2_NORMAL, 0, 3); defineMap(GL_MAP1_NORMAL, 0, 3); defineMap(GL_MAP2_TEXTURE_COORD_1, 0, 1); defineMap(GL_MAP1_TEXTURE_COORD_1, 0, 1); defineMap(GL_MAP2_TEXTURE_COORD_2, 0, 2); defineMap(GL_MAP1_TEXTURE_COORD_2, 0, 2); defineMap(GL_MAP2_TEXTURE_COORD_3, 0, 3); defineMap(GL_MAP1_TEXTURE_COORD_3, 0, 3); defineMap(GL_MAP2_TEXTURE_COORD_4, 1, 4); defineMap(GL_MAP1_TEXTURE_COORD_4, 1, 4); defineMap(GL_MAP2_VERTEX_4, 1, 4); defineMap(GL_MAP1_VERTEX_4, 1, 4); defineMap(GL_MAP2_VERTEX_3, 0, 3); defineMap(GL_MAP1_VERTEX_3, 0, 3); defineMap(GL_MAP2_COLOR_4, 0, 4); defineMap(GL_MAP1_COLOR_4, 0, 4); defineMap(GL_MAP2_INDEX, 0, 1); defineMap(GL_MAP1_INDEX, 0, 1); setnurbsproperty(GL_MAP1_VERTEX_3, N_SAMPLINGMETHOD, (float) N_PATHLENGTH); setnurbsproperty(GL_MAP1_VERTEX_4, N_SAMPLINGMETHOD, (float) N_PATHLENGTH); setnurbsproperty(GL_MAP2_VERTEX_3, N_SAMPLINGMETHOD, (float) N_PATHLENGTH); setnurbsproperty(GL_MAP2_VERTEX_4, N_SAMPLINGMETHOD, (float) N_PATHLENGTH); setnurbsproperty(GL_MAP1_VERTEX_3, N_PIXEL_TOLERANCE, (float) 50.0); setnurbsproperty(GL_MAP1_VERTEX_4, N_PIXEL_TOLERANCE, (float) 50.0); setnurbsproperty(GL_MAP2_VERTEX_3, N_PIXEL_TOLERANCE, (float) 50.0); setnurbsproperty(GL_MAP2_VERTEX_4, N_PIXEL_TOLERANCE, (float) 50.0); setnurbsproperty(GL_MAP1_VERTEX_3, N_ERROR_TOLERANCE, (float) 0.50); setnurbsproperty(GL_MAP1_VERTEX_4, N_ERROR_TOLERANCE, (float) 0.50); setnurbsproperty(GL_MAP2_VERTEX_3, N_ERROR_TOLERANCE, (float) 0.50); setnurbsproperty(GL_MAP2_VERTEX_4, N_ERROR_TOLERANCE, (float) 0.50); setnurbsproperty(GL_MAP1_VERTEX_3, N_S_STEPS, (float) 100.0); setnurbsproperty(GL_MAP1_VERTEX_4, N_S_STEPS, (float) 100.0); setnurbsproperty(GL_MAP2_VERTEX_3, N_S_STEPS, (float) 100.0); setnurbsproperty(GL_MAP2_VERTEX_4, N_S_STEPS, (float) 100.0); //added for optimizing untrimmed case set_domain_distance_u_rate(100.0); setnurbsproperty(GL_MAP1_VERTEX_3, N_T_STEPS, (float) 100.0); setnurbsproperty(GL_MAP1_VERTEX_4, N_T_STEPS, (float) 100.0); setnurbsproperty(GL_MAP2_VERTEX_3, N_T_STEPS, (float) 100.0); setnurbsproperty(GL_MAP2_VERTEX_4, N_T_STEPS, (float) 100.0); //added for optimizing untrimmed case set_domain_distance_v_rate(100.0); set_is_domain_distance_sampling(0); //since the default is path_length //default autoloadmode is true autoloadmode = 1; //default callbackFlag is 0 callbackFlag = 0; errorCallback = NULL; } void GLUnurbs::bgnrender(void) { if (autoloadmode) { loadGLMatrices(); } } void GLUnurbs::endrender(void) { } void GLUnurbs::errorHandler(int i) { int gluError; gluError = i + (GLU_NURBS_ERROR1 - 1); postError( gluError ); } void GLUnurbs::loadGLMatrices(void) { GLfloat vmat[4][4]; GLint viewport[4]; grabGLMatrix((GLfloat (*)[4]) vmat); loadCullingMatrix((GLfloat (*)[4]) vmat); ::glGetIntegerv((GLenum) GL_VIEWPORT, (GLint *) viewport); loadSamplingMatrix((const GLfloat (*)[4]) vmat, (const GLint *) viewport); } void GLUnurbs::useGLMatrices(const GLfloat modelMatrix[16], const GLfloat projMatrix[16], const GLint viewport[4]) { GLfloat vmat[4][4]; multmatrix4d(vmat, (const GLfloat (*)[4]) modelMatrix, (const GLfloat (*)[4]) projMatrix); loadCullingMatrix((GLfloat (*)[4]) vmat); loadSamplingMatrix((const GLfloat (*)[4]) vmat, (const GLint *) viewport); } /*-------------------------------------------------------------------------- * grabGLMatrix *-------------------------------------------------------------------------- */ void GLUnurbs::grabGLMatrix(GLfloat vmat[4][4]) { GLfloat m1[4][4], m2[4][4]; ::glGetFloatv((GLenum) GL_MODELVIEW_MATRIX, (GLfloat *) &(m1[0][0])); ::glGetFloatv((GLenum) GL_PROJECTION_MATRIX, (GLfloat *) &(m2[0][0])); multmatrix4d((GLfloat (*)[4]) vmat, (const GLfloat (*)[4]) m1, (const GLfloat (*)[4]) m2); } //for object space tesselation: view independent void GLUnurbs::setSamplingMatrixIdentity( void ) { INREAL smat[4][4] = { {1,0,0,0}, {0,1,0,0}, {0,0,1,0}, {0,0,0,1} }; const long rstride = sizeof(smat[0]) / sizeof(smat[0][0]); const long cstride = 1; setnurbsproperty(GL_MAP1_VERTEX_3, N_SAMPLINGMATRIX, &smat[0][0], rstride, cstride); setnurbsproperty(GL_MAP1_VERTEX_4, N_SAMPLINGMATRIX, &smat[0][0], rstride, cstride); setnurbsproperty(GL_MAP2_VERTEX_3, N_SAMPLINGMATRIX, &smat[0][0], rstride, cstride); setnurbsproperty(GL_MAP2_VERTEX_4, N_SAMPLINGMATRIX, &smat[0][0], rstride, cstride); } void GLUnurbs::loadSamplingMatrix(const GLfloat vmat[4][4], const GLint viewport[4]) { /* rescale the mapping to correspond to pixels in x/y */ REAL xsize = 0.5 * (REAL) (viewport[2]); REAL ysize = 0.5 * (REAL) (viewport[3]); INREAL smat[4][4]; smat[0][0] = vmat[0][0] * xsize; smat[1][0] = vmat[1][0] * xsize; smat[2][0] = vmat[2][0] * xsize; smat[3][0] = vmat[3][0] * xsize; smat[0][1] = vmat[0][1] * ysize; smat[1][1] = vmat[1][1] * ysize; smat[2][1] = vmat[2][1] * ysize; smat[3][1] = vmat[3][1] * ysize; smat[0][2] = 0.0; smat[1][2] = 0.0; smat[2][2] = 0.0; smat[3][2] = 0.0; smat[0][3] = vmat[0][3]; smat[1][3] = vmat[1][3]; smat[2][3] = vmat[2][3]; smat[3][3] = vmat[3][3]; const long rstride = sizeof(smat[0]) / sizeof(smat[0][0]); const long cstride = 1; setnurbsproperty(GL_MAP1_VERTEX_3, N_SAMPLINGMATRIX, &smat[0][0], rstride, cstride); setnurbsproperty(GL_MAP1_VERTEX_4, N_SAMPLINGMATRIX, &smat[0][0], rstride, cstride); setnurbsproperty(GL_MAP2_VERTEX_3, N_SAMPLINGMATRIX, &smat[0][0], rstride, cstride); setnurbsproperty(GL_MAP2_VERTEX_4, N_SAMPLINGMATRIX, &smat[0][0], rstride, cstride); } void GLUnurbs::loadCullingMatrix(GLfloat vmat[4][4]) { INREAL cmat[4][4]; cmat[0][0] = vmat[0][0]; cmat[0][1] = vmat[0][1]; cmat[0][2] = vmat[0][2]; cmat[0][3] = vmat[0][3]; cmat[1][0] = vmat[1][0]; cmat[1][1] = vmat[1][1]; cmat[1][2] = vmat[1][2]; cmat[1][3] = vmat[1][3]; cmat[2][0] = vmat[2][0]; cmat[2][1] = vmat[2][1]; cmat[2][2] = vmat[2][2]; cmat[2][3] = vmat[2][3]; cmat[3][0] = vmat[3][0]; cmat[3][1] = vmat[3][1]; cmat[3][2] = vmat[3][2]; cmat[3][3] = vmat[3][3]; const long rstride = sizeof(cmat[0]) / sizeof(cmat[0][0]); const long cstride = 1; setnurbsproperty(GL_MAP2_VERTEX_3, N_CULLINGMATRIX, &cmat[0][0], rstride, cstride); setnurbsproperty(GL_MAP2_VERTEX_4, N_CULLINGMATRIX, &cmat[0][0], rstride, cstride); //added for curves by zl setnurbsproperty(GL_MAP1_VERTEX_3, N_CULLINGMATRIX, &cmat[0][0], rstride, cstride); setnurbsproperty(GL_MAP1_VERTEX_4, N_CULLINGMATRIX, &cmat[0][0], rstride, cstride); } /*--------------------------------------------------------------------- * A = B * MAT ; transform a 4d vector through a 4x4 matrix *--------------------------------------------------------------------- */ void GLUnurbs::transform4d(GLfloat A[4], GLfloat B[4], GLfloat mat[4][4]) { A[0] = B[0]*mat[0][0] + B[1]*mat[1][0] + B[2]*mat[2][0] + B[3]*mat[3][0]; A[1] = B[0]*mat[0][1] + B[1]*mat[1][1] + B[2]*mat[2][1] + B[3]*mat[3][1]; A[2] = B[0]*mat[0][2] + B[1]*mat[1][2] + B[2]*mat[2][2] + B[3]*mat[3][2]; A[3] = B[0]*mat[0][3] + B[1]*mat[1][3] + B[2]*mat[2][3] + B[3]*mat[3][3]; } /*--------------------------------------------------------------------- * new = [left][right] ; multiply two matrices together *--------------------------------------------------------------------- */ void GLUnurbs::multmatrix4d (GLfloat n[4][4], const GLfloat left[4][4], const GLfloat right[4][4]) { transform4d ((GLfloat *) n[0],(GLfloat *) left[0],(GLfloat (*)[4]) right); transform4d ((GLfloat *) n[1],(GLfloat *) left[1],(GLfloat (*)[4]) right); transform4d ((GLfloat *) n[2],(GLfloat *) left[2],(GLfloat (*)[4]) right); transform4d ((GLfloat *) n[3],(GLfloat *) left[3],(GLfloat (*)[4]) right); }