1 |
greg |
2.1 |
#ifndef lint |
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greg |
2.2 |
static const char RCSid[] = "$Id: rcontrib.c,v 2.1 2012/06/09 07:16:47 greg Exp $"; |
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greg |
2.1 |
#endif |
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/* |
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* Accumulate ray contributions for a set of materials |
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* Initialization and calculation routines |
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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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greg |
2.2 |
char *shm_boundary = NULL; /* boundary of shared memory */ |
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16 |
greg |
2.1 |
CUBE thescene; /* our scene */ |
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OBJECT nsceneobjs; /* number of objects in our scene */ |
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int dimlist[MAXDIM]; /* sampling dimensions */ |
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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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23 |
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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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int do_irrad = 0; /* compute irradiance? */ |
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int rand_samp = 0; /* 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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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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int directvis = 1; /* sources visible? */ |
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double srcsizerat = .2; /* maximum ratio source size/dist. */ |
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COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
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COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
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double seccg = 0.; /* global scattering eccentricity */ |
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double ssampdist = 0.; /* scatter sampling distance */ |
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double specthresh = .15; /* specular sampling threshold */ |
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double specjitter = 1.; /* specular sampling jitter */ |
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46 |
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int backvis = 1; /* back face visibility */ |
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48 |
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int maxdepth = 8; /* maximum recursion depth */ |
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double minweight = 5e-4; /* minimum ray weight */ |
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51 |
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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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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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int ambounce = 1; /* ambient bounces */ |
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char *amblist[AMBLLEN+1]; /* ambient include/exclude list */ |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
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int account; /* current accumulation count */ |
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RNUMBER raysleft; /* number of rays left to trace */ |
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long waitflush; /* how long until next flush */ |
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int lastray = 0; /* last ray number sent */ |
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int lastdone = 0; /* last ray output */ |
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/* Close output stream and free record */ |
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static void |
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closestream(void *p) |
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{ |
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STREAMOUT *sop = (STREAMOUT *)p; |
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int status = 0; |
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if (sop->outpipe) |
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status = pclose(sop->ofp); |
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else if (sop->ofp != stdout) |
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status = fclose(sop->ofp); |
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if (status) |
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error(SYSTEM, "error closing output stream"); |
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free(p); |
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} |
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LUTAB ofiletab = LU_SINIT(free,closestream); /* output file table */ |
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86 |
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#define OF_MODIFIER 01 |
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#define OF_BIN 02 |
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static void mcfree(void *p) { epfree((*(MODCONT *)p).binv); free(p); } |
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91 |
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LUTAB modconttab = LU_SINIT(NULL,mcfree); /* modifier lookup table */ |
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static OBJECT traset[MAXTSET+1]={0}; /* trace include set */ |
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/************************** INITIALIZATION ROUTINES ***********************/ |
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void |
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tranotify( /* record new modifier */ |
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OBJECT obj |
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) |
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{ |
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static int hitlimit = 0; |
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OBJREC *o = objptr(obj); |
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int i; |
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if (obj == OVOID) { /* starting over */ |
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traset[0] = 0; |
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hitlimit = 0; |
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return; |
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} |
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if (hitlimit || !ismodifier(o->otype)) |
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return; |
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for (i = nmods; i-- > 0; ) |
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if (!strcmp(o->oname, modname[i])) { |
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if (traset[0] >= MAXTSET) { |
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error(WARNING, "too many same-named modifiers"); |
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hitlimit++; |
118 |
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return; /* should this be fatal? */ |
119 |
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} |
120 |
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insertelem(traset, obj); |
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break; |
122 |
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} |
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} |
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char * |
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formstr( /* return format identifier */ |
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int f |
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) |
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{ |
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switch (f) { |
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case 'a': return("ascii"); |
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case 'f': return("float"); |
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case 'd': return("double"); |
135 |
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case 'c': return(COLRFMT); |
136 |
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} |
137 |
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return("unknown"); |
138 |
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} |
139 |
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140 |
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141 |
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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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{ |
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LUENT *lep = lu_find(&modconttab,modn); |
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MODCONT *mp; |
147 |
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EPNODE *ebinv; |
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int i; |
149 |
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150 |
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if (lep->data != NULL) { |
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sprintf(errmsg, "duplicate modifier '%s'", modn); |
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error(USER, errmsg); |
153 |
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} |
154 |
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if (nmods >= MAXMODLIST) |
155 |
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error(INTERNAL, "too many modifiers"); |
156 |
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modname[nmods++] = modn; /* XXX assumes static string */ |
157 |
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lep->key = modn; /* XXX assumes static string */ |
158 |
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if (binv == NULL) |
159 |
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binv = "0"; /* use single bin if unspecified */ |
160 |
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ebinv = eparse(binv); |
161 |
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if (ebinv->type == NUM) { /* check value if constant */ |
162 |
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bincnt = (int)(evalue(ebinv) + 1.5); |
163 |
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if (bincnt != 1) { |
164 |
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sprintf(errmsg, "illegal non-zero constant for bin (%s)", |
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binv); |
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error(USER, errmsg); |
167 |
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} |
168 |
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} else if (bincnt <= 0) { |
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sprintf(errmsg, |
170 |
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"unspecified or illegal bin count for modifier '%s'", |
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modn); |
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error(USER, errmsg); |
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} |
174 |
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/* initialize results holder */ |
175 |
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mp = (MODCONT *)malloc(sizeof(MODCONT)+sizeof(DCOLOR)*(bincnt-1)); |
176 |
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if (mp == 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->binv = ebinv; |
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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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lep->data = (char *)mp; |
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return(mp); |
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} |
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190 |
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191 |
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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) |
194 |
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{ |
195 |
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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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sprintf(errmsg, "cannot find modifier file '%s'", fname); |
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error(SYSTEM, 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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} |
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void |
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quit( /* quit program */ |
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int code |
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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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exit(code); |
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} |
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217 |
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/* Initialize our process(es) */ |
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static void |
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rcinit() |
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{ |
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int i; |
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224 |
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if (nproc > MAXPROCESS) |
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sprintf(errmsg, "too many processes requested -- reducing to %d", |
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nproc = MAXPROCESS); |
227 |
greg |
2.2 |
if (nproc > 1) { |
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preload_objs(); /* preload auxiliary data */ |
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/* set shared memory boundary */ |
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shm_boundary = strcpy((char *)malloc(16), "SHM_BOUNDARY"); |
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} |
232 |
greg |
2.1 |
if ((nproc > 1) & (accumulate <= 0)) |
233 |
greg |
2.2 |
put_zero_record(0); /* prime our queue to accumulate */ |
234 |
greg |
2.1 |
|
235 |
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if (recover) { /* recover previous output? */ |
236 |
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if (accumulate <= 0) { |
237 |
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reload_output(); |
238 |
greg |
2.2 |
if (nproc > 1) |
239 |
greg |
2.1 |
queue_modifiers(); |
240 |
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} else |
241 |
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recover_output(); |
242 |
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} |
243 |
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if (yres > 0) { /* set up flushing & ray counts */ |
244 |
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if (xres > 0) |
245 |
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raysleft = (RNUMBER)xres*yres; |
246 |
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else |
247 |
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raysleft = yres; |
248 |
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} else |
249 |
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raysleft = 0; |
250 |
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if ((account = accumulate) > 1) |
251 |
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raysleft *= accumulate; |
252 |
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waitflush = (yres > 0) & (xres > 1) ? 0 : xres; |
253 |
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/* tracing to sources as well */ |
254 |
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for (i = 0; i < nsources; i++) |
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source[i].sflags |= SFOLLOW; |
256 |
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257 |
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if (nproc == 1 || in_rchild()) /* single process or child */ |
258 |
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return; /* return to main processing loop */ |
259 |
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260 |
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parental_loop(); /* else run controller */ |
261 |
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quit(0); /* parent musn't return! */ |
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} |
263 |
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264 |
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/************************** MAIN CALCULATION PROCESS ***********************/ |
265 |
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266 |
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/* Our trace call to sum contributions */ |
267 |
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static void |
268 |
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trace_contrib(RAY *r) |
269 |
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{ |
270 |
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MODCONT *mp; |
271 |
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int bn; |
272 |
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RREAL contr[3]; |
273 |
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274 |
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if (r->ro == NULL || !inset(traset, r->ro->omod)) |
275 |
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return; |
276 |
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277 |
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mp = (MODCONT *)lu_find(&modconttab,objptr(r->ro->omod)->oname)->data; |
278 |
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279 |
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if (mp == NULL) |
280 |
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error(CONSISTENCY, "unexpected modifier in trace_contrib()"); |
281 |
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282 |
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worldfunc(RCCONTEXT, r); /* get bin number */ |
283 |
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bn = (int)(evalue(mp->binv) + .5); |
284 |
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if ((bn < 0) | (bn >= mp->nbins)) { |
285 |
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error(WARNING, "bad bin number (ignored)"); |
286 |
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return; |
287 |
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} |
288 |
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raycontrib(contr, r, PRIMARY); |
289 |
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if (contrib) |
290 |
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multcolor(contr, r->rcol); |
291 |
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addcolor(mp->cbin[bn], contr); |
292 |
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} |
293 |
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294 |
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295 |
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static void |
296 |
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rayirrad( /* compute irradiance rather than radiance */ |
297 |
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RAY *r |
298 |
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) |
299 |
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{ |
300 |
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r->rot = 1e-5; /* pretend we hit surface */ |
301 |
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VSUM(r->rop, r->rorg, r->rdir, r->rot); |
302 |
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r->ron[0] = -r->rdir[0]; |
303 |
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r->ron[1] = -r->rdir[1]; |
304 |
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r->ron[2] = -r->rdir[2]; |
305 |
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r->rod = 1.0; |
306 |
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/* compute result */ |
307 |
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r->revf = raytrace; |
308 |
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(*ofun[Lamb.otype].funp)(&Lamb, r); |
309 |
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r->revf = rayirrad; |
310 |
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} |
311 |
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312 |
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313 |
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/* Evaluate ray contributions */ |
314 |
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static void |
315 |
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eval_ray(FVECT org, FVECT dir, double dmax) |
316 |
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{ |
317 |
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RAY thisray; |
318 |
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/* set up ray */ |
319 |
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rayorigin(&thisray, PRIMARY, NULL, NULL); |
320 |
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if (imm_irrad) { |
321 |
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VSUM(thisray.rorg, org, dir, 1.1e-4); |
322 |
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thisray.rdir[0] = -dir[0]; |
323 |
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thisray.rdir[1] = -dir[1]; |
324 |
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thisray.rdir[2] = -dir[2]; |
325 |
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thisray.rmax = 0.0; |
326 |
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thisray.revf = rayirrad; |
327 |
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} else { |
328 |
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VCOPY(thisray.rorg, org); |
329 |
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VCOPY(thisray.rdir, dir); |
330 |
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thisray.rmax = dmax; |
331 |
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} |
332 |
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samplendx++; /* call ray evaluation */ |
333 |
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rayvalue(&thisray); |
334 |
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} |
335 |
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336 |
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337 |
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/* Accumulate and/or output ray contributions (child or only process) */ |
338 |
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static void |
339 |
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done_contrib() |
340 |
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{ |
341 |
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MODCONT *mp; |
342 |
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int i; |
343 |
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344 |
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if (account <= 0 || --account) |
345 |
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return; /* not time yet */ |
346 |
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347 |
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for (i = 0; i < nmods; i++) { /* output records & clear */ |
348 |
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mp = (MODCONT *)lu_find(&modconttab,modname[i])->data; |
349 |
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mod_output(mp); |
350 |
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memset(mp->cbin, 0, sizeof(DCOLOR)*mp->nbins); |
351 |
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} |
352 |
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end_record(); /* end lines & flush if time */ |
353 |
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354 |
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account = accumulate; /* reset accumulation counter */ |
355 |
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} |
356 |
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357 |
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358 |
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/* Principal calculation loop (called by main) */ |
359 |
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void |
360 |
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rcontrib() |
361 |
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{ |
362 |
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static int ignore_warning_given = 0; |
363 |
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FVECT orig, direc; |
364 |
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double d; |
365 |
greg |
2.2 |
/* initialize (& fork more of us) */ |
366 |
greg |
2.1 |
rcinit(); |
367 |
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/* load rays from stdin & process */ |
368 |
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#ifdef getc_unlocked |
369 |
greg |
2.2 |
flockfile(stdin); /* avoid mutex overhead */ |
370 |
greg |
2.1 |
#endif |
371 |
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while (getvec(orig) == 0 && getvec(direc) == 0) { |
372 |
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d = normalize(direc); |
373 |
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if ((d == 0.0) & (accumulate != 1)) { |
374 |
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if (!ignore_warning_given++) |
375 |
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error(WARNING, |
376 |
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"dummy ray(s) ignored during accumulation\n"); |
377 |
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continue; |
378 |
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} |
379 |
|
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if (lastray+1 < lastray) |
380 |
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lastray = lastdone = 0; |
381 |
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++lastray; |
382 |
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if (d == 0.0) { /* zero ==> flush */ |
383 |
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if ((yres <= 0) | (xres <= 0)) |
384 |
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waitflush = 1; /* flush right after */ |
385 |
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} else { /* else compute */ |
386 |
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eval_ray(orig, direc, lim_dist ? d : 0.0); |
387 |
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} |
388 |
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done_contrib(); /* accumulate/output */ |
389 |
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++lastdone; |
390 |
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if (raysleft && !--raysleft) |
391 |
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break; /* preemptive EOI */ |
392 |
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} |
393 |
|
|
if (accumulate <= 0 || account < accumulate) { |
394 |
|
|
if (account < accumulate) { |
395 |
|
|
error(WARNING, "partial accumulation in final record"); |
396 |
|
|
accumulate -= account; |
397 |
|
|
} |
398 |
|
|
account = 1; /* output accumulated totals */ |
399 |
|
|
done_contrib(); |
400 |
|
|
} |
401 |
|
|
if (raysleft) |
402 |
|
|
error(USER, "unexpected EOF on input"); |
403 |
|
|
lu_done(&ofiletab); /* close output files */ |
404 |
|
|
} |