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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Routines for Radiance -> OpenGL materials. |
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*/ |
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#include "copyright.h" |
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#include "radogl.h" |
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extern int free(), freemtl(); |
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int domats = 1; /* are we doing materials? */ |
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LUTAB mtab = LU_SINIT(free,freemtl); |
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void |
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rgl_matclear() /* clean up materials */ |
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{ |
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lu_done(&mtab); |
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} |
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int |
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o_default(o) /* default object is non-material modifier */ |
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register OBJREC *o; |
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{ |
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freemtl(lup->data); |
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if ((lup->data = o->os) != NULL) /* make material reference */ |
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((MATREC *)lup->data)->nlinks++; |
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return; |
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return(0); |
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memerr: |
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error(SYSTEM, "out of memory in o_default"); |
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return(0); |
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} |
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int |
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o_unsupported(o) /* unsupported object primitive */ |
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OBJREC *o; |
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{ |
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objerror(o, WARNING, "unsupported type"); |
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return(0); |
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} |
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MATREC * |
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newmaterial(nam) /* get an entry for a new material */ |
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char *nam; |
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return((MATREC *)lup->data); |
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memerr: |
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error(SYSTEM, "out of memory in newmaterial"); |
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return NULL; /* pro forma return */ |
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} |
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freemtl(mp) /* free a material */ |
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register MATREC *mp; |
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void |
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freemtl(p) /* free a material */ |
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void *p; |
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{ |
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register MATREC *mp = (MATREC *)p; |
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if (!--mp->nlinks) |
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free((char *)mp); |
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free((void *)mp); |
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} |
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int |
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m_normal(o) /* compute normal material parameters */ |
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register OBJREC *o; |
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{ |
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m->u.m.specexp = 2./(o->oargs.farg[4]*o->oargs.farg[4]); |
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if (m->u.m.specexp > MAXSPECEXP) |
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m->u.m.specexp = MAXSPECEXP; |
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return(0); |
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} |
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int |
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m_aniso(o) /* anisotropic material */ |
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register OBJREC *o; |
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{ |
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m->u.m.specexp = 2./(o->oargs.farg[4]*o->oargs.farg[5]); |
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if (m->u.m.specexp > MAXSPECEXP) |
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m->u.m.specexp = MAXSPECEXP; |
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return(0); |
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} |
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int |
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m_glass(o) /* glass material (hopeless) */ |
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OBJREC *o; |
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{ |
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setcolor(m->u.m.ambdiff, 0., 0., 0.); |
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setcolor(m->u.m.specular, .08, .08, .08); |
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m->u.m.specexp = MAXSPECEXP; |
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return(0); |
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} |
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int |
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m_brdf(o) /* convert functional material */ |
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register OBJREC *o; |
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{ |
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scalecolor(m->u.m.ambdiff, 1.-o->oargs.farg[4]); |
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} |
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m->u.m.specexp = UNKSPECEXP; |
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return(0); |
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} |
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int |
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m_brdf2(o) /* convert advanced functional material */ |
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register OBJREC *o; |
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{ |
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/* guess the rest */ |
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setcolor(m->u.m.specular, .1, .1, .1); |
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m->u.m.specexp = UNKSPECEXP; |
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return(0); |
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} |
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int |
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m_light(o) /* convert light type */ |
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register OBJREC *o; |
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{ |
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m->u.l.spotdir[0] = m->u.l.spotdir[1] = 0.; |
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m->u.l.spotdir[2] = -1.; |
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} |
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return(0); |
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} |
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int |
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m_mirror(o) /* convert mirror type */ |
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register OBJREC *o; |
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{ |
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setcolor(m->u.m.specular, o->oargs.farg[0], |
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o->oargs.farg[1], o->oargs.farg[2]); |
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m->u.m.specexp = MAXSPECEXP; |
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return(0); |
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} |
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int |
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m_prism(o) /* convert prism type */ |
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register OBJREC *o; |
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{ |
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setcolor(m->u.m.ambdiff, 0.2, 0.2, 0.2); |
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setcolor(m->u.m.specular, 0.1, 0.1, 0.1); |
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m->u.m.specexp = UNKSPECEXP; |
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return(0); |
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} |