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/* Copyright (c) 1992 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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* Support routines for source objects and materials |
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* |
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* External symbols declared in source.h |
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*/ |
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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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SRCFUNC sfun[NUMOTYPE]; /* source dispatch table */ |
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void |
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initstypes() /* initialize source dispatch table */ |
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{ |
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extern VSMATERIAL mirror_vs, direct1_vs, direct2_vs; |
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extern int fsetsrc(), ssetsrc(), sphsetsrc(), cylsetsrc(), rsetsrc(); |
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extern int nopart(), flatpart(), cylpart(); |
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extern double fgetplaneq(), rgetplaneq(); |
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extern double fgetmaxdisk(), rgetmaxdisk(); |
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static SOBJECT fsobj = {fsetsrc, flatpart, fgetplaneq, fgetmaxdisk}; |
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static SOBJECT ssobj = {ssetsrc, nopart}; |
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static SOBJECT sphsobj = {sphsetsrc, nopart}; |
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if (nsources == 0) |
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source = (SRCREC *)malloc(SRCINC*sizeof(SRCREC)); |
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else if (nsources%SRCINC == 0) |
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source = (SRCREC *)realloc((char *)source, |
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source = (SRCREC *)realloc((void *)source, |
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(unsigned)(nsources+SRCINC)*sizeof(SRCREC)); |
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if (source == NULL) |
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return(-1); |
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} |
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void |
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setflatss(src) /* set sampling for a flat source */ |
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register SRCREC *src; |
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{ |
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} |
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void |
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fsetsrc(src, so) /* set a face as a source */ |
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register SRCREC *src; |
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OBJREC *so; |
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} |
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src->srad = sqrt(src->srad); |
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/* compute size vectors */ |
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if (f->nv == 4 || (f->nv == 5 && /* parallelogram case */ |
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dist2(VERTEX(f,0),VERTEX(f,4)) <= FTINY*FTINY)) |
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if (f->nv == 4) /* parallelogram case */ |
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for (j = 0; j < 3; j++) { |
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src->ss[SU][j] = .5*(VERTEX(f,1)[j]-VERTEX(f,0)[j]); |
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src->ss[SV][j] = .5*(VERTEX(f,3)[j]-VERTEX(f,0)[j]); |
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} |
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void |
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ssetsrc(src, so) /* set a source as a source */ |
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register SRCREC *src; |
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register OBJREC *so; |
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} |
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void |
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sphsetsrc(src, so) /* set a sphere as a source */ |
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register SRCREC *src; |
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register OBJREC *so; |
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} |
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void |
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rsetsrc(src, so) /* set a ring (disk) as a source */ |
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register SRCREC *src; |
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OBJREC *so; |
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} |
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void |
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cylsetsrc(src, so) /* set a cylinder as a source */ |
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register SRCREC *src; |
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OBJREC *so; |
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} |
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spotout(r, s, dist) /* check if we're outside spot region */ |
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int |
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spotout(r, s) /* check if we're outside spot region */ |
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register RAY *r; |
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register SPOT *s; |
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int dist; |
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{ |
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double d; |
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FVECT vd; |
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if (s == NULL) |
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return(0); |
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if (dist) { /* distant source */ |
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if (s->flen < -FTINY) { /* distant source */ |
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vd[0] = s->aim[0] - r->rorg[0]; |
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vd[1] = s->aim[1] - r->rorg[1]; |
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vd[2] = s->aim[2] - r->rorg[2]; |
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} |
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int |
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commonspot(sp1, sp2, org) /* set sp1 to intersection of sp1 and sp2 */ |
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register SPOT *sp1, *sp2; |
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FVECT org; |
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} |
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int |
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commonbeam(sp1, sp2, dir) /* set sp1 to intersection of sp1 and sp2 */ |
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register SPOT *sp1, *sp2; |
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FVECT dir; |
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} |
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int |
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checkspot(sp, nrm) /* check spotlight for behind source */ |
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register SPOT *sp; /* spotlight */ |
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FVECT nrm; /* source surface normal */ |