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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 simulating virtual light sources |
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* Thus far, we only support planar mirrors. |
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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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|
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#include "ray.h" |
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#include "octree.h" |
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#include "otypes.h" |
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#include "source.h" |
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#define STESTMAX 32 /* maximum seeks per sample */ |
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double getdisk(); |
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static OBJECT *vobject; /* virtual source objects */ |
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static int nvobjects = 0; /* number of virtual source objects */ |
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void |
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markvirtuals() /* find and mark virtual sources */ |
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{ |
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register OBJREC *o; |
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if (directrelay <= 0) |
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return; |
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/* find virtual source objects */ |
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for (i = 0; i < nobjects; i++) { |
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for (i = 0; i < nsceneobjs; i++) { |
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o = objptr(i); |
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if (!issurface(o->otype) || o->omod == OVOID) |
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continue; |
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if (nvobjects == 0) |
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vobject = (OBJECT *)malloc(sizeof(OBJECT)); |
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else |
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< |
vobject = (OBJECT *)realloc((char *)vobject, |
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vobject = (OBJECT *)realloc((void *)vobject, |
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(unsigned)(nvobjects+1)*sizeof(OBJECT)); |
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if (vobject == NULL) |
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error(SYSTEM, "out of memory in addvirtuals"); |
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for (i = nsources; i-- > 0; ) |
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addvirtuals(i, directrelay); |
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/* done with our object list */ |
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< |
free((char *)vobject); |
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free((void *)vobject); |
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nvobjects = 0; |
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} |
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void |
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addvirtuals(sn, nr) /* add virtuals associated with source */ |
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int sn; |
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int nr; |
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} |
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void |
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vproject(o, sn, n) /* create projected source(s) if they exist */ |
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OBJREC *o; |
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int sn; |
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else |
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nsflags &= ~SSPOT; |
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if (source[sn].sflags & SSPOT) { |
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copystruct(&theirspot, source[sn].sl.s); |
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theirspot = *(source[sn].sl.s); |
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multv3(theirspot.aim, source[sn].sl.s->aim, pm); |
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normalize(theirspot.aim); |
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if (nsflags & SSPOT) { |
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return(-1); /* no overlap */ |
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} else { |
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nsflags |= SSPOT; |
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copystruct(&ourspot, &theirspot); |
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ourspot = theirspot; |
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d = 2.*ourspot.siz; |
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} |
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if (ourspot.siz < d-FTINY) { /* it shrunk */ |
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if (nsflags & SSPOT) { |
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if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
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goto memerr; |
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< |
copystruct(source[i].sl.s, &ourspot); |
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*(source[i].sl.s) = ourspot; |
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} |
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if (nsflags & SPROX) |
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source[i].sl.prox = source[sn].sl.prox; |
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#ifdef DEBUG |
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void |
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virtverb(sn, fp) /* print verbose description of virtual source */ |
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register int sn; |
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FILE *fp; |
