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/* Copyright (c) 1995 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Routines for mirror material supporting virtual light sources |
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*/ |
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#include "ray.h" |
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#include "copyright.h" |
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#include "ray.h" |
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#include "otypes.h" |
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#include "rtotypes.h" |
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#include "source.h" |
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/* |
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* part of the direct calculation. |
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*/ |
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static int mir_proj(MAT4 pm, OBJREC *o, SRCREC *s, int n); |
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static void mirrorproj(MAT4 m, FVECT nv, double offs); |
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int mir_proj(); |
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VSMATERIAL mirror_vs = {mir_proj, 1}; |
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m_mirror(m, r) /* shade mirrored ray */ |
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register OBJREC *m; |
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register RAY *r; |
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extern int |
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m_mirror( /* shade mirrored ray */ |
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register OBJREC *m, |
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register RAY *r |
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) |
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{ |
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COLOR mcolor; |
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RAY nr; |
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int rpure = 1; |
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register int i; |
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/* check arguments */ |
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if (m->oargs.nfargs != 3 || m->oargs.nsargs > 1) |
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raytrans(r); |
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return(1); |
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} |
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return(rayshade(r, modifier(m->oargs.sarg[0]))); |
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return(rayshade(r, lastmod(objndx(m), m->oargs.sarg[0]))); |
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} |
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/* check for bad source ray */ |
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if (r->rsrc >= 0 && source[r->rsrc].so != r->ro) |
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if (rayorigin(&nr, r, REFLECTED, bright(mcolor)) < 0) |
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return(1); |
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pdot = raynormal(pnorm, r); /* use textures */ |
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for (i = 0; i < 3; i++) |
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nr.rdir[i] = r->rdir[i] + 2.*pdot*pnorm[i]; |
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if (DOT(r->pert,r->pert) > FTINY*FTINY) { |
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pdot = raynormal(pnorm, r); /* use textures */ |
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for (i = 0; i < 3; i++) |
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nr.rdir[i] = r->rdir[i] + 2.*pdot*pnorm[i]; |
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rpure = 0; |
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} |
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/* check for penetration */ |
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if (DOT(nr.rdir, r->ron) <= FTINY) |
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if (rpure || DOT(nr.rdir, r->ron) <= FTINY) |
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for (i = 0; i < 3; i++) |
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nr.rdir[i] = r->rdir[i] + 2.*r->rod*r->ron[i]; |
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} |
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rayvalue(&nr); |
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multcolor(nr.rcol, mcolor); |
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addcolor(r->rcol, nr.rcol); |
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if (rpure && r->ro != NULL && isflat(r->ro->otype)) |
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r->rt = r->rot + nr.rt; |
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return(1); |
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} |
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mir_proj(pm, o, s, n) /* compute a mirror's projection */ |
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MAT4 pm; |
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register OBJREC *o; |
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SRCREC *s; |
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int n; |
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static int |
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mir_proj( /* compute a mirror's projection */ |
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MAT4 pm, |
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register OBJREC *o, |
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SRCREC *s, |
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int n |
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) |
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{ |
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FVECT nv, sc; |
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double od; |
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} |
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mirrorproj(m, nv, offs) /* get mirror projection for surface */ |
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register MAT4 m; |
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FVECT nv; |
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double offs; |
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static void |
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mirrorproj( /* get mirror projection for surface */ |
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register MAT4 m, |
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FVECT nv, |
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double offs |
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) |
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{ |
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register int i, j; |
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/* assign matrix */ |
