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greg |
2.1 |
#ifndef lint |
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greg |
2.3 |
static const char RCSid[] = "$Id: rcontrib.c,v 2.2 2012/06/10 05:25:42 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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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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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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greg |
2.3 |
int rand_samp = 1; /* pure Monte Carlo sampling? */ |
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greg |
2.1 |
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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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int backvis = 1; /* back face visibility */ |
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greg |
2.3 |
int maxdepth = -10; /* maximum recursion depth */ |
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double minweight = 2e-3; /* minimum ray weight */ |
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greg |
2.1 |
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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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static void mcfree(void *p) { epfree((*(MODCONT *)p).binv); free(p); } |
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71 |
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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++; |
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return; /* should this be fatal? */ |
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} |
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insertelem(traset, obj); |
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break; |
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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"); |
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case 'c': return(COLRFMT); |
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} |
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return("unknown"); |
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} |
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120 |
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121 |
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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; |
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EPNODE *ebinv; |
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int i; |
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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); |
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} |
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if (nmods >= MAXMODLIST) |
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error(INTERNAL, "too many modifiers"); |
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modname[nmods++] = modn; /* XXX assumes static string */ |
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lep->key = modn; /* XXX assumes static string */ |
138 |
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if (binv == NULL) |
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binv = "0"; /* use single bin if unspecified */ |
140 |
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ebinv = eparse(binv); |
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if (ebinv->type == NUM) { /* check value if constant */ |
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bincnt = (int)(evalue(ebinv) + 1.5); |
143 |
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if (bincnt != 1) { |
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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); |
147 |
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} |
148 |
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} else if (bincnt <= 0) { |
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sprintf(errmsg, |
150 |
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"unspecified or illegal bin count for modifier '%s'", |
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modn); |
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error(USER, errmsg); |
153 |
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} |
154 |
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/* initialize results holder */ |
155 |
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mp = (MODCONT *)malloc(sizeof(MODCONT)+sizeof(DCOLOR)*(bincnt-1)); |
156 |
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if (mp == NULL) |
157 |
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error(SYSTEM, "out of memory in addmodifier"); |
158 |
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mp->outspec = outf; /* XXX assumes static string */ |
159 |
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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); |
168 |
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} |
169 |
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170 |
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171 |
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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) |
174 |
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{ |
175 |
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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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/* 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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204 |
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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); |
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greg |
2.2 |
if (nproc > 1) { |
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preload_objs(); /* preload auxiliary data */ |
209 |
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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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greg |
2.1 |
if ((nproc > 1) & (accumulate <= 0)) |
213 |
greg |
2.2 |
put_zero_record(0); /* prime our queue to accumulate */ |
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greg |
2.1 |
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if (recover) { /* recover previous output? */ |
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if (accumulate <= 0) { |
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reload_output(); |
218 |
greg |
2.2 |
if (nproc > 1) |
219 |
greg |
2.1 |
queue_modifiers(); |
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} else |
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recover_output(); |
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} |
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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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else |
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raysleft = yres; |
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} else |
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raysleft = 0; |
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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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if (nproc == 1 || in_rchild()) /* single process or child */ |
238 |
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return; /* return to main processing loop */ |
239 |
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240 |
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parental_loop(); /* else run controller */ |
241 |
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quit(0); /* parent musn't return! */ |
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} |
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/************************** MAIN CALCULATION PROCESS ***********************/ |
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246 |
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/* Our trace call to sum contributions */ |
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static void |
248 |
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trace_contrib(RAY *r) |
249 |
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{ |
250 |
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MODCONT *mp; |
251 |
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int bn; |
252 |
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RREAL contr[3]; |
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254 |
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if (r->ro == NULL || !inset(traset, r->ro->omod)) |
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return; |
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257 |
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mp = (MODCONT *)lu_find(&modconttab,objptr(r->ro->omod)->oname)->data; |
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259 |
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if (mp == NULL) |
260 |
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error(CONSISTENCY, "unexpected modifier in trace_contrib()"); |
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262 |
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worldfunc(RCCONTEXT, r); /* get bin number */ |
263 |
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bn = (int)(evalue(mp->binv) + .5); |
264 |
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if ((bn < 0) | (bn >= mp->nbins)) { |
265 |
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error(WARNING, "bad bin number (ignored)"); |
266 |
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return; |
267 |
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} |
268 |
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raycontrib(contr, r, PRIMARY); |
269 |
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if (contrib) |
270 |
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multcolor(contr, r->rcol); |
271 |
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addcolor(mp->cbin[bn], contr); |
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} |
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274 |
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275 |
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static void |
276 |
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rayirrad( /* compute irradiance rather than radiance */ |
277 |
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RAY *r |
278 |
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) |
279 |
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{ |
280 |
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r->rot = 1e-5; /* pretend we hit surface */ |
281 |
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VSUM(r->rop, r->rorg, r->rdir, r->rot); |
282 |
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r->ron[0] = -r->rdir[0]; |
283 |
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r->ron[1] = -r->rdir[1]; |
284 |
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r->ron[2] = -r->rdir[2]; |
285 |
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r->rod = 1.0; |
286 |
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/* compute result */ |
287 |
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r->revf = raytrace; |
288 |
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(*ofun[Lamb.otype].funp)(&Lamb, r); |
289 |
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r->revf = rayirrad; |
290 |
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} |
291 |
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292 |
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293 |
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/* Evaluate ray contributions */ |
294 |
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static void |
295 |
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eval_ray(FVECT org, FVECT dir, double dmax) |
296 |
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{ |
297 |
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RAY thisray; |
298 |
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/* set up ray */ |
299 |
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rayorigin(&thisray, PRIMARY, NULL, NULL); |
300 |
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if (imm_irrad) { |
301 |
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VSUM(thisray.rorg, org, dir, 1.1e-4); |
302 |
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thisray.rdir[0] = -dir[0]; |
303 |
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thisray.rdir[1] = -dir[1]; |
304 |
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thisray.rdir[2] = -dir[2]; |
305 |
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thisray.rmax = 0.0; |
306 |
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thisray.revf = rayirrad; |
307 |
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} else { |
308 |
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VCOPY(thisray.rorg, org); |
309 |
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VCOPY(thisray.rdir, dir); |
310 |
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thisray.rmax = dmax; |
311 |
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} |
312 |
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samplendx++; /* call ray evaluation */ |
313 |
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rayvalue(&thisray); |
314 |
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} |
315 |
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316 |
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317 |
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/* Accumulate and/or output ray contributions (child or only process) */ |
318 |
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static void |
319 |
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done_contrib() |
320 |
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{ |
321 |
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MODCONT *mp; |
322 |
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int i; |
323 |
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324 |
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if (account <= 0 || --account) |
325 |
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return; /* not time yet */ |
326 |
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327 |
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for (i = 0; i < nmods; i++) { /* output records & clear */ |
328 |
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mp = (MODCONT *)lu_find(&modconttab,modname[i])->data; |
329 |
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mod_output(mp); |
330 |
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memset(mp->cbin, 0, sizeof(DCOLOR)*mp->nbins); |
331 |
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} |
332 |
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end_record(); /* end lines & flush if time */ |
333 |
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334 |
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account = accumulate; /* reset accumulation counter */ |
335 |
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} |
336 |
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337 |
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338 |
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/* Principal calculation loop (called by main) */ |
339 |
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void |
340 |
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rcontrib() |
341 |
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{ |
342 |
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static int ignore_warning_given = 0; |
343 |
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FVECT orig, direc; |
344 |
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double d; |
345 |
greg |
2.2 |
/* initialize (& fork more of us) */ |
346 |
greg |
2.1 |
rcinit(); |
347 |
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/* load rays from stdin & process */ |
348 |
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#ifdef getc_unlocked |
349 |
greg |
2.2 |
flockfile(stdin); /* avoid mutex overhead */ |
350 |
greg |
2.1 |
#endif |
351 |
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while (getvec(orig) == 0 && getvec(direc) == 0) { |
352 |
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d = normalize(direc); |
353 |
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if ((d == 0.0) & (accumulate != 1)) { |
354 |
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if (!ignore_warning_given++) |
355 |
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error(WARNING, |
356 |
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"dummy ray(s) ignored during accumulation\n"); |
357 |
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continue; |
358 |
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} |
359 |
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if (lastray+1 < lastray) |
360 |
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lastray = lastdone = 0; |
361 |
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++lastray; |
362 |
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if (d == 0.0) { /* zero ==> flush */ |
363 |
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if ((yres <= 0) | (xres <= 0)) |
364 |
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waitflush = 1; /* flush right after */ |
365 |
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} else { /* else compute */ |
366 |
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eval_ray(orig, direc, lim_dist ? d : 0.0); |
367 |
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} |
368 |
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done_contrib(); /* accumulate/output */ |
369 |
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++lastdone; |
370 |
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if (raysleft && !--raysleft) |
371 |
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break; /* preemptive EOI */ |
372 |
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} |
373 |
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if (accumulate <= 0 || account < accumulate) { |
374 |
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if (account < accumulate) { |
375 |
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error(WARNING, "partial accumulation in final record"); |
376 |
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accumulate -= account; |
377 |
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} |
378 |
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account = 1; /* output accumulated totals */ |
379 |
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done_contrib(); |
380 |
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} |
381 |
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if (raysleft) |
382 |
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error(USER, "unexpected EOF on input"); |
383 |
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lu_done(&ofiletab); /* close output files */ |
384 |
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} |