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* Initialization and calculation routines |
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*/ |
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#include "copyright.h" |
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|
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#include "rcontrib.h" |
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#include "source.h" |
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#include "otypes.h" |
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#include "platform.h" |
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#include "source.h" |
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|
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char *shm_boundary = NULL; /* boundary of shared memory */ |
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|
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int ndims = 0; /* number of sampling dimensions */ |
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int samplendx = 0; /* index for this sample */ |
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|
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static void trace_contrib(RAY *r); /* our trace callback */ |
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void (*trace)() = trace_contrib; |
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void (*trace)(); |
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|
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int do_irrad = 0; /* compute irradiance? */ |
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|
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int rand_samp = 1; /* pure Monte Carlo sampling? */ |
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|
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double dstrsrc = 0.9; /* square source distribution */ |
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double shadthresh = .03; /* shadow threshold */ |
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double shadthresh = 0.; /* shadow threshold */ |
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double shadcert = .75; /* shadow certainty */ |
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int directrelay = 3; /* number of source relays */ |
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int vspretest = 512; /* virtual source pretest density */ |
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double seccg = 0.; /* global scattering eccentricity */ |
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double ssampdist = 0.; /* scatter sampling distance */ |
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|
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double specthresh = .15; /* specular sampling threshold */ |
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double specthresh = .02; /* specular sampling threshold */ |
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double specjitter = 1.; /* specular sampling jitter */ |
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|
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int backvis = 1; /* back face visibility */ |
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char *ambfile = NULL; /* ambient file name */ |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
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int ambvwt = 0; /* initial weight for ambient value */ |
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double ambacc = 0; /* ambient accuracy */ |
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double ambacc = 0.; /* ambient accuracy */ |
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int ambres = 256; /* ambient resolution */ |
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int ambdiv = 350; /* ambient divisions */ |
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int ambssamp = 0; /* ambient super-samples */ |
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RNUMBER lastray = 0; /* last ray number sent */ |
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RNUMBER lastdone = 0; /* last ray output */ |
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|
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static void trace_contrib(RAY *r); /* our trace callback */ |
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|
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static void mcfree(void *p) { epfree((*(MODCONT *)p).binv); free(p); } |
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|
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LUTAB modconttab = LU_SINIT(NULL,mcfree); /* modifier lookup table */ |
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/* Add modifier to our list to track */ |
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MODCONT * |
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addmodifier(char *modn, char *outf, char *binv, int bincnt) |
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addmodifier(char *modn, char *outf, char *prms, char *binv, int bincnt) |
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{ |
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LUENT *lep = lu_find(&modconttab,modn); |
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MODCONT *mp; |
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sprintf(errmsg, "duplicate modifier '%s'", modn); |
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error(USER, errmsg); |
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} |
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if (nmods >= MAXMODLIST) |
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error(INTERNAL, "too many modifiers"); |
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if (nmods >= MAXMODLIST) { |
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sprintf(errmsg, "too many modifiers (%d limit)", MAXMODLIST); |
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error(INTERNAL, errmsg); |
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} |
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if (!strcmp(modn, VOIDID)) { |
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sprintf(errmsg, "cannot track '%s' modifier", VOIDID); |
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error(USER, errmsg); |
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} |
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modname[nmods++] = modn; /* XXX assumes static string */ |
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lep->key = modn; /* XXX assumes static string */ |
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if (binv == NULL) |
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error(SYSTEM, "out of memory in addmodifier"); |
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mp->outspec = outf; /* XXX assumes static string */ |
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mp->modname = modn; /* XXX assumes static string */ |
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mp->params = prms; /* XXX assumes static string */ |
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mp->binv = ebinv; |
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mp->bin0 = 0; |
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mp->nbins = bincnt; |
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memset(mp->cbin, 0, sizeof(DCOLOR)*bincnt); |
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/* allocate output streams */ |
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for (i = bincnt; i-- > 0; ) |
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getostream(mp->outspec, mp->modname, i, 1); |
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/* figure out starting bin */ |
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while (!getostream(mp->outspec, mp->modname, mp->bin0, 1)) |
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mp->bin0++; |
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/* allocate other output streams */ |
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for (i = 0; ++i < mp->nbins; ) |
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getostream(mp->outspec, mp->modname, mp->bin0+i, 1); |
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lep->data = (char *)mp; |
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return(mp); |
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} |
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/* add modifiers from a file list */ |
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/* Add modifiers from a file list */ |
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void |
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addmodfile(char *fname, char *outf, char *binv, int bincnt) |
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addmodfile(char *fname, char *outf, char *prms, char *binv, int bincnt) |
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{ |
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char *mname[MAXMODLIST]; |
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int i; |
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/* find the file & store strings */ |
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if (wordfile(mname, getpath(fname, getrlibpath(), R_OK)) < 0) { |
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i = wordfile(mname, MAXMODLIST, getpath(fname, getrlibpath(), R_OK)); |
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if (i < 0) { |
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sprintf(errmsg, "cannot find modifier file '%s'", fname); |
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error(SYSTEM, errmsg); |
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} |
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if (i >= MAXMODLIST-1) { |
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sprintf(errmsg, "too many modifiers (%d limit) in file '%s'", |
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MAXMODLIST-1, fname); |
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error(INTERNAL, errmsg); |
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} |
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for (i = 0; mname[i]; i++) /* add each one */ |
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addmodifier(mname[i], outf, binv, bincnt); |
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addmodifier(mname[i], outf, prms, binv, bincnt); |
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} |
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) |
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{ |
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if (nchild > 0) /* close children if any */ |
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end_children(); |
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end_children(code != 0); |
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exit(code); |
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} |
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/* Initialize our process(es) */ |
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static void |
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rcinit() |
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rcinit(void) |
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{ |
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int i; |
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|
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/* set shared memory boundary */ |
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shm_boundary = strcpy((char *)malloc(16), "SHM_BOUNDARY"); |
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} |
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trace = trace_contrib; /* set up trace call-back */ |
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for (i = 0; i < nsources; i++) /* tracing to sources as well */ |
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source[i].sflags |= SFOLLOW; |
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if (yres > 0) { /* set up flushing & ray counts */ |
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if (xres > 0) |
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raysleft = (RNUMBER)xres*yres; |
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if ((account = accumulate) > 1) |
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raysleft *= accumulate; |
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waitflush = (yres > 0) & (xres > 1) ? 0 : xres; |
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/* tracing to sources as well */ |
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for (i = 0; i < nsources; i++) |
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source[i].sflags |= SFOLLOW; |
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|
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if (nproc > 1 && in_rchild()) /* forked child? */ |
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return; /* return to main processing loop */ |
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trace_contrib(RAY *r) |
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{ |
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MODCONT *mp; |
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double bval; |
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int bn; |
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RREAL contr[3]; |
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|
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if (r->ro == NULL || r->ro->omod == OVOID) |
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return; |
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/* shadow ray not on source? */ |
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if (r->rsrc >= 0 && source[r->rsrc].so != r->ro) |
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return; |
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|
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mp = (MODCONT *)lu_find(&modconttab,objptr(r->ro->omod)->oname)->data; |
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|
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if (mp == NULL) /* not in our list? */ |
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return; |
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|
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worldfunc(RCCONTEXT, r); /* get bin number */ |
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< |
bn = (int)(evalue(mp->binv) + .5); |
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if ((bn < 0) | (bn >= mp->nbins)) { |
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error(WARNING, "bad bin number (ignored)"); |
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> |
worldfunc(RCCONTEXT, r); /* else set context */ |
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> |
set_eparams((char *)mp->params); |
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if ((bval = evalue(mp->binv)) <= -.5) /* and get bin number */ |
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return; /* silently ignore negatives */ |
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if ((bn = (int)(bval + .5)) >= mp->nbins) { |
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sprintf(errmsg, "bad bin number (%d ignored)", bn); |
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error(WARNING, errmsg); |
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return; |
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} |
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raycontrib(contr, r, PRIMARY); |
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raycontrib(contr, r, PRIMARY); /* compute coefficient */ |
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if (contrib) |
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< |
multcolor(contr, r->rcol); |
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multcolor(contr, r->rcol); /* -> contribution */ |
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addcolor(mp->cbin[bn], contr); |
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} |
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|
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thisray.rdir[2] = -dir[2]; |
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thisray.rmax = 0.0; |
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rayorigin(&thisray, PRIMARY, NULL, NULL); |
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< |
thisray.rot = 1e-5; /* pretend we hit surface */ |
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> |
/* pretend we hit surface */ |
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> |
thisray.rt = thisray.rot = 1e-5; |
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thisray.rod = 1.0; |
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VCOPY(thisray.ron, dir); |
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VSUM(thisray.rop, org, dir, 1e-4); |
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samplendx++; /* compute result */ |
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(*ofun[Lamb.otype].funp)(&Lamb, &thisray); |
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|
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/* Accumulate and/or output ray contributions (child or only process) */ |
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static void |
310 |
< |
done_contrib() |
310 |
> |
done_contrib(void) |
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{ |
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MODCONT *mp; |
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int i; |
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|
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/* Principal calculation loop (called by main) */ |
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void |
331 |
< |
rcontrib() |
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> |
rcontrib(void) |
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{ |
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static int ignore_warning_given = 0; |
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FVECT orig, direc; |
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#endif |
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while (getvec(orig) == 0 && getvec(direc) == 0) { |
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d = normalize(direc); |
344 |
< |
if (nchild != -1 && (d == 0.0) & (accumulate != 1)) { |
344 |
> |
if (nchild != -1 && (d == 0.0) & (accumulate == 0)) { |
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if (!ignore_warning_given++) |
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error(WARNING, |
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"dummy ray(s) ignored during accumulation\n"); |
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lastray = lastdone = 0; |
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++lastray; |
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if (d == 0.0) { /* zero ==> flush */ |
354 |
< |
if ((yres <= 0) | (xres <= 0)) |
355 |
< |
waitflush = 1; /* flush right after */ |
356 |
< |
account = 1; |
354 |
> |
if ((yres <= 0) | (xres <= 1)) |
355 |
> |
waitflush = 1; /* flush after */ |
356 |
> |
if (nchild == -1) |
357 |
> |
account = 1; |
358 |
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} else if (imm_irrad) { /* else compute */ |
359 |
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eval_irrad(orig, direc); |
360 |
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} else { |
365 |
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if (raysleft && !--raysleft) |
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break; /* preemptive EOI */ |
367 |
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} |
368 |
< |
if ((accumulate <= 0) | (account < accumulate)) { |
368 |
> |
if (nchild != -1 && (accumulate <= 0) | (account < accumulate)) { |
369 |
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if (account < accumulate) { |
370 |
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error(WARNING, "partial accumulation in final record"); |
371 |
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accumulate -= account; |