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#include "ray.h" |
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#include "source.h" |
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#include "bsdf.h" |
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#include "ambient.h" |
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#include "otypes.h" |
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#include "random.h" |
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#include "data.h" |
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#include "font.h" |
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#include "pmapray.h" |
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char *progname = "unknown_app"; /* caller sets to argv[0] */ |
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void (*addobjnotify[8])() = {ambnotify, NULL}; |
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int castonly = 0; /* only doing ray-casting? */ |
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|
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int do_irrad = 0; /* compute irradiance? */ |
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int rand_samp = 0; /* pure Monte Carlo sampling? */ |
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int rand_samp = 1; /* pure Monte Carlo sampling? */ |
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double dstrsrc = 0.0; /* square source distribution */ |
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double shadthresh = .03; /* shadow threshold */ |
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int backvis = 1; /* back face visibility */ |
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int maxdepth = 8; /* maximum recursion depth */ |
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double minweight = 2e-3; /* minimum ray weight */ |
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int maxdepth = -10; /* maximum recursion depth */ |
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double minweight = 1e-4; /* minimum ray weight */ |
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char *ambfile = NULL; /* ambient file name */ |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
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extern void |
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static void |
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reset_random(void) /* re-initialize random number generator */ |
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{ |
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if (rand_samp) { |
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srandom((long)time(0)); |
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initurand(0); |
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} else { |
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srandom(0L); |
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initurand(2048); |
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} |
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} |
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void |
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ray_init( /* initialize ray-tracing calculation */ |
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char *otnm |
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) |
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if (ofun[OBJ_SPHERE].funp == o_default) |
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initotypes(); |
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/* initialize urand */ |
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srandom(rand_samp ? (long)time(0) : 0L); |
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initurand(2048); |
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/* read scene octree */ |
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readoct(octname = otnm, ~(IO_FILES|IO_INFO), &thescene, NULL); |
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reset_random(); |
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|
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octname = savqstr(otnm); /* read scene octree */ |
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readoct(octname, ~(IO_FILES|IO_INFO), &thescene, NULL); |
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nsceneobjs = nobjects; |
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/* find and mark sources */ |
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marksources(); |
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/* initialize ambient calculation */ |
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setambient(); |
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/* ready to go... */ |
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|
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if (!castonly) { /* any actual ray traversal to do? */ |
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|
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ray_init_pmap(); /* PMAP: set up & load photon maps */ |
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|
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marksources(); /* find and mark sources */ |
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setambient(); /* initialize ambient calculation */ |
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} else |
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distantsources(); /* else mark only distant sources */ |
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} |
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extern void |
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|
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void |
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ray_trace( /* trace a primary ray */ |
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RAY *r |
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) |
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{ |
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rayorigin(r, PRIMARY, NULL, NULL); |
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samplendx = rand_samp ? random() : samplendx+1; |
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samplendx++; |
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rayvalue(r); /* assumes origin and direction are set */ |
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} |
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extern void |
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void |
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ray_done( /* free ray-tracing data */ |
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int freall |
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) |
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donesets(); |
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octdone(); |
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thescene.cutree = EMPTY; |
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octname = NULL; |
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freeqstr(octname); octname = NULL; |
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retainfonts = 0; |
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if (freall) { |
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retainfonts = 0; |
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freefont(NULL); |
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freedata(NULL); |
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SDfreeCache(NULL); |
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initurand(0); |
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} |
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if (nobjects > 0) { |
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sprintf(errmsg, "%ld objects left after call to ray_done()", |
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nobjects); |
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(long)nobjects); |
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error(WARNING, errmsg); |
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} |
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ray_done_pmap(); |
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} |
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extern void |
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void |
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ray_save( /* save current parameter settings */ |
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RAYPARAMS *rp |
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) |
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if (rp == NULL) |
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return; |
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rp->do_irrad = do_irrad; |
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rp->rand_samp = rand_samp; |
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rp->dstrsrc = dstrsrc; |
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rp->shadthresh = shadthresh; |
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rp->shadcert = shadcert; |
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rp->backvis = backvis; |
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rp->maxdepth = maxdepth; |
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rp->minweight = minweight; |
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copycolor(rp->ambval, ambval); |
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memset(rp->ambfile, '\0', sizeof(rp->ambfile)); |
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if (ambfile != NULL) |
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strncpy(rp->ambfile, ambfile, sizeof(rp->ambfile)-1); |
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else |
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memset(rp->ambfile, '\0', sizeof(rp->ambfile)); |
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copycolor(rp->ambval, ambval); |
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rp->ambvwt = ambvwt; |
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rp->ambacc = ambacc; |
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rp->ambres = ambres; |
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if (ndx+len >= sizeof(rp->amblval)) |
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break; |
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strcpy(rp->amblval+ndx, amblist[i]); |
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rp->amblndx[i] = ndx; |
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ndx += len+1; |
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} |
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while (i <= AMBLLEN) |
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rp->amblndx[i++] = -1; |
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|
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/* PMAP: save photon mapping params */ |
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ray_save_pmap(rp); |
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} |
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extern void |
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void |
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ray_restore( /* restore parameter settings */ |
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RAYPARAMS *rp |
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) |
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{ |
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register int i; |
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int i; |
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if (rp == NULL) { /* restore defaults */ |
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RAYPARAMS dflt; |
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} |
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/* restore saved settings */ |
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do_irrad = rp->do_irrad; |
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if (!rand_samp != !rp->rand_samp) { |
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rand_samp = rp->rand_samp; |
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reset_random(); |
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} |
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dstrsrc = rp->dstrsrc; |
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shadthresh = rp->shadthresh; |
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shadcert = rp->shadcert; |
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ambdiv = rp->ambdiv; |
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ambssamp = rp->ambssamp; |
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ambounce = rp->ambounce; |
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/* a bit dangerous if not static */ |
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for (i = 0; rp->amblndx[i] >= 0; i++) |
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amblist[i] = rp->amblval + rp->amblndx[i]; |
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while (i <= AMBLLEN) |
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ambincl = rp->ambincl; |
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/* update ambient calculation */ |
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ambnotify(OVOID); |
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if (thescene.cutree != EMPTY) { |
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if ((thescene.cutree != EMPTY) & !castonly) { |
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int newamb = (ambfile == NULL) ? rp->ambfile[0] : |
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strcmp(ambfile, rp->ambfile) ; |
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ambres = rp->ambres; |
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ambacc = rp->ambacc; |
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} |
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/* PMAP: restore photon mapping params */ |
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ray_restore_pmap(rp); |
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} |
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< |
extern void |
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void |
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ray_defaults( /* get default parameter values */ |
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RAYPARAMS *rp |
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) |
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return; |
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rp->do_irrad = 0; |
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rp->rand_samp = 1; |
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rp->dstrsrc = 0.0; |
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rp->shadthresh = .03; |
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rp->shadcert = .75; |
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rp->shadthresh = 0.03; |
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rp->shadcert = 0.75; |
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rp->directrelay = 2; |
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rp->vspretest = 512; |
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rp->directvis = 1; |
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setcolor(rp->salbedo, 0., 0., 0.); |
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rp->seccg = 0.; |
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rp->ssampdist = 0.; |
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rp->specthresh = .15; |
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rp->specthresh = 0.15; |
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rp->specjitter = 1.; |
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rp->backvis = 1; |
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rp->maxdepth = 8; |
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rp->minweight = 2e-3; |
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setcolor(rp->ambval, 0., 0., 0.); |
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rp->maxdepth = -10; |
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rp->minweight = 1e-4; |
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memset(rp->ambfile, '\0', sizeof(rp->ambfile)); |
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setcolor(rp->ambval, 0., 0., 0.); |
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rp->ambvwt = 0; |
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rp->ambres = 256; |
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rp->ambacc = 0.15; |
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rp->ambacc = 0.1; |
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rp->ambdiv = 1024; |
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rp->ambssamp = 512; |
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rp->ambounce = 0; |
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memset(rp->amblval, '\0', sizeof(rp->amblval)); |
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for (i = AMBLLEN+1; i--; ) |
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rp->amblndx[i] = -1; |
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|
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/* PMAP: restore photon mapping defaults */ |
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ray_defaults_pmap(rp); |
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} |