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greg |
2.1 |
#ifndef lint |
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greg |
2.46 |
static const char RCSid[] = "$Id: rcontrib.c,v 2.45 2024/08/21 20:42:20 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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greg |
2.20 |
#include "copyright.h" |
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greg |
2.1 |
#include "rcontrib.h" |
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#include "otypes.h" |
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greg |
2.14 |
#include "source.h" |
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greg |
2.1 |
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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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greg |
2.33 |
void (*trace)() = NULL; /* trace call (NULL before rcinit) */ |
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greg |
2.1 |
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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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greg |
2.8 |
double dstrsrc = 0.9; /* square source distribution */ |
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greg |
2.31 |
double shadthresh = 0.; /* shadow threshold */ |
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greg |
2.1 |
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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greg |
2.30 |
double specthresh = .02; /* specular sampling threshold */ |
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greg |
2.1 |
double specjitter = 1.; /* specular sampling jitter */ |
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| 44 |
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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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greg |
2.31 |
double ambacc = 0.; /* ambient accuracy */ |
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greg |
2.1 |
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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greg |
2.4 |
RNUMBER lastray = 0; /* last ray number sent */ |
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RNUMBER lastdone = 0; /* last ray output */ |
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greg |
2.1 |
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greg |
2.32 |
static void trace_contrib(RAY *r); /* our trace callback */ |
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greg |
2.44 |
static void mcfree(void *p) { epfree((*(MODCONT *)p).binv,1); free(p); } |
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greg |
2.1 |
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LUTAB modconttab = LU_SINIT(NULL,mcfree); /* modifier lookup table */ |
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/************************** INITIALIZATION ROUTINES ***********************/ |
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greg |
2.42 |
const char * |
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greg |
2.1 |
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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greg |
2.43 |
case 'c': return(NCSAMP==3 ? COLRFMT : SPECFMT); |
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greg |
2.1 |
} |
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return("unknown"); |
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} |
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/* Add modifier to our list to track */ |
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MODCONT * |
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greg |
2.20 |
addmodifier(char *modn, char *outf, char *prms, char *binv, int bincnt) |
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greg |
2.1 |
{ |
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greg |
2.46 |
static int lastNCS = 0; |
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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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| 100 |
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if (!lastNCS) |
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lastNCS = NCSAMP; |
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else if (NCSAMP != lastNCS) |
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error(INTERNAL, |
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"number of spectral samples must be set before first modifier"); |
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greg |
2.1 |
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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greg |
2.26 |
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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greg |
2.40 |
if (nmods >= modasiz) { /* need bigger modifier array */ |
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greg |
2.41 |
modasiz += modasiz/2 + 64; |
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greg |
2.40 |
if (modname == NULL) |
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modname = (char **)malloc(modasiz*sizeof(char *)); |
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else |
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modname = (char **)realloc(modname, modasiz*sizeof(char *)); |
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if (modname == NULL) |
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greg |
2.46 |
error(SYSTEM, "out of memory in addmodifier()"); |
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greg |
2.40 |
} |
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greg |
2.1 |
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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binv = "0"; /* use single bin if unspecified */ |
| 126 |
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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); |
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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); |
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} |
| 134 |
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} else if (bincnt <= 0) { |
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sprintf(errmsg, |
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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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} |
| 140 |
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/* initialize results holder */ |
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greg |
2.43 |
mp = (MODCONT *)malloc(mcsize(bincnt)); |
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greg |
2.1 |
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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greg |
2.28 |
mp->params = prms; /* XXX assumes static string */ |
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greg |
2.1 |
mp->binv = ebinv; |
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greg |
2.29 |
mp->bin0 = 0; |
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greg |
2.1 |
mp->nbins = bincnt; |
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greg |
2.43 |
memset(mp->cbin, 0, DCOLORSIZ*bincnt); |
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greg |
2.29 |
/* 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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greg |
2.1 |
lep->data = (char *)mp; |
| 158 |
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return(mp); |
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} |
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greg |
2.10 |
/* Add modifiers from a file list */ |
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greg |
2.1 |
void |
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greg |
2.20 |
addmodfile(char *fname, char *outf, char *prms, char *binv, int bincnt) |
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greg |
2.1 |
{ |
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greg |
2.40 |
char *path = getpath(fname, getrlibpath(), R_OK); |
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char mod[MAXSTR]; |
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FILE *fp; |
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if (path == NULL || (fp = fopen(path, "r")) == NULL) { |
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greg |
2.41 |
if (path == NULL) |
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sprintf(errmsg, "cannot find modifier file '%s'", fname); |
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else |
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sprintf(errmsg, "cannot load modifier file '%s'", path); |
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greg |
2.1 |
error(SYSTEM, errmsg); |
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} |
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greg |
2.40 |
while (fgetword(mod, sizeof(mod), fp) != NULL) |
| 178 |
greg |
2.41 |
addmodifier(savqstr(mod), outf, prms, binv, bincnt); |
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greg |
2.40 |
fclose(fp); |
| 180 |
greg |
2.1 |
} |
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greg |
2.37 |
/* Check if we have any more rays left (and report progress) */ |
| 184 |
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int |
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morays(void) |
| 186 |
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{ |
| 187 |
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static RNUMBER total_rays; |
| 188 |
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static time_t tstart, last_report; |
| 189 |
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time_t tnow; |
| 190 |
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| 191 |
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if (!raysleft) |
| 192 |
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return(1); /* unknown total, so nothing to do or say */ |
| 193 |
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| 194 |
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if (report_intvl > 0 && (tnow = time(0)) >= last_report+report_intvl) { |
| 195 |
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if (!total_rays) { |
| 196 |
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total_rays = raysleft; |
| 197 |
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tstart = tnow; |
| 198 |
greg |
2.39 |
} else { |
| 199 |
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sprintf(errmsg, "%.2f%% done after %.3f hours\n", |
| 200 |
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100.-100.*raysleft/total_rays, |
| 201 |
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(1./3600.)*(tnow - tstart)); |
| 202 |
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eputs(errmsg); |
| 203 |
greg |
2.37 |
} |
| 204 |
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last_report = tnow; |
| 205 |
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} |
| 206 |
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return(--raysleft); |
| 207 |
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} |
| 208 |
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| 209 |
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| 210 |
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/* Quit program */ |
| 211 |
greg |
2.1 |
void |
| 212 |
greg |
2.37 |
quit( |
| 213 |
greg |
2.1 |
int code |
| 214 |
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) |
| 215 |
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{ |
| 216 |
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if (nchild > 0) /* close children if any */ |
| 217 |
greg |
2.10 |
end_children(code != 0); |
| 218 |
greg |
2.36 |
else if (nchild < 0) |
| 219 |
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_exit(code); /* avoid flush() in child */ |
| 220 |
greg |
2.1 |
exit(code); |
| 221 |
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} |
| 222 |
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| 223 |
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| 224 |
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/* Initialize our process(es) */ |
| 225 |
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static void |
| 226 |
greg |
2.28 |
rcinit(void) |
| 227 |
greg |
2.1 |
{ |
| 228 |
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int i; |
| 229 |
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| 230 |
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if (nproc > MAXPROCESS) |
| 231 |
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sprintf(errmsg, "too many processes requested -- reducing to %d", |
| 232 |
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nproc = MAXPROCESS); |
| 233 |
greg |
2.45 |
if (nproc > 1) |
| 234 |
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cow_memshare(); /* preload auxiliary data */ |
| 235 |
greg |
2.32 |
trace = trace_contrib; /* set up trace call-back */ |
| 236 |
greg |
2.14 |
for (i = 0; i < nsources; i++) /* tracing to sources as well */ |
| 237 |
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source[i].sflags |= SFOLLOW; |
| 238 |
greg |
2.1 |
if (yres > 0) { /* set up flushing & ray counts */ |
| 239 |
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if (xres > 0) |
| 240 |
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raysleft = (RNUMBER)xres*yres; |
| 241 |
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else |
| 242 |
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raysleft = yres; |
| 243 |
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} else |
| 244 |
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raysleft = 0; |
| 245 |
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if ((account = accumulate) > 1) |
| 246 |
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raysleft *= accumulate; |
| 247 |
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waitflush = (yres > 0) & (xres > 1) ? 0 : xres; |
| 248 |
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| 249 |
greg |
2.5 |
if (nproc > 1 && in_rchild()) /* forked child? */ |
| 250 |
greg |
2.1 |
return; /* return to main processing loop */ |
| 251 |
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| 252 |
greg |
2.5 |
if (recover) { /* recover previous output? */ |
| 253 |
greg |
2.8 |
if (accumulate <= 0) |
| 254 |
greg |
2.5 |
reload_output(); |
| 255 |
greg |
2.8 |
else |
| 256 |
greg |
2.5 |
recover_output(); |
| 257 |
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} |
| 258 |
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if (nproc == 1) /* single process? */ |
| 259 |
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return; |
| 260 |
greg |
2.8 |
/* else run appropriate controller */ |
| 261 |
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if (accumulate <= 0) |
| 262 |
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feeder_loop(); |
| 263 |
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else |
| 264 |
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parental_loop(); |
| 265 |
greg |
2.1 |
quit(0); /* parent musn't return! */ |
| 266 |
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} |
| 267 |
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| 268 |
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/************************** MAIN CALCULATION PROCESS ***********************/ |
| 269 |
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| 270 |
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/* Our trace call to sum contributions */ |
| 271 |
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static void |
| 272 |
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trace_contrib(RAY *r) |
| 273 |
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{ |
| 274 |
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MODCONT *mp; |
| 275 |
greg |
2.19 |
double bval; |
| 276 |
greg |
2.1 |
int bn; |
| 277 |
greg |
2.43 |
SCOLOR contr; |
| 278 |
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DCOLORV *dvp; |
| 279 |
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int i; |
| 280 |
greg |
2.1 |
|
| 281 |
greg |
2.6 |
if (r->ro == NULL || r->ro->omod == OVOID) |
| 282 |
greg |
2.1 |
return; |
| 283 |
greg |
2.20 |
/* shadow ray not on source? */ |
| 284 |
|
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if (r->rsrc >= 0 && source[r->rsrc].so != r->ro) |
| 285 |
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return; |
| 286 |
greg |
2.1 |
|
| 287 |
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mp = (MODCONT *)lu_find(&modconttab,objptr(r->ro->omod)->oname)->data; |
| 288 |
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| 289 |
greg |
2.6 |
if (mp == NULL) /* not in our list? */ |
| 290 |
|
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return; |
| 291 |
greg |
2.1 |
|
| 292 |
greg |
2.21 |
worldfunc(RCCONTEXT, r); /* else set context */ |
| 293 |
greg |
2.22 |
set_eparams((char *)mp->params); |
| 294 |
greg |
2.21 |
if ((bval = evalue(mp->binv)) <= -.5) /* and get bin number */ |
| 295 |
|
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return; /* silently ignore negatives */ |
| 296 |
greg |
2.19 |
if ((bn = (int)(bval + .5)) >= mp->nbins) { |
| 297 |
greg |
2.23 |
sprintf(errmsg, "bad bin number (%d ignored)", bn); |
| 298 |
|
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error(WARNING, errmsg); |
| 299 |
greg |
2.1 |
return; |
| 300 |
|
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} |
| 301 |
greg |
2.14 |
raycontrib(contr, r, PRIMARY); /* compute coefficient */ |
| 302 |
greg |
2.1 |
if (contrib) |
| 303 |
greg |
2.43 |
smultscolor(contr, r->rcol); /* -> contribution */ |
| 304 |
|
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dvp = mcbin(mp, bn); |
| 305 |
|
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for (i = 0; i < NCSAMP; i++) /* add it in */ |
| 306 |
|
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*dvp++ += contr[i]; |
| 307 |
greg |
2.1 |
} |
| 308 |
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| 309 |
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| 310 |
greg |
2.7 |
/* Evaluate irradiance contributions */ |
| 311 |
greg |
2.1 |
static void |
| 312 |
greg |
2.7 |
eval_irrad(FVECT org, FVECT dir) |
| 313 |
greg |
2.1 |
{ |
| 314 |
greg |
2.7 |
RAY thisray; |
| 315 |
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| 316 |
|
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VSUM(thisray.rorg, org, dir, 1.1e-4); |
| 317 |
|
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thisray.rdir[0] = -dir[0]; |
| 318 |
|
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thisray.rdir[1] = -dir[1]; |
| 319 |
|
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thisray.rdir[2] = -dir[2]; |
| 320 |
|
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thisray.rmax = 0.0; |
| 321 |
|
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rayorigin(&thisray, PRIMARY, NULL, NULL); |
| 322 |
greg |
2.16 |
/* pretend we hit surface */ |
| 323 |
greg |
2.35 |
thisray.rxt = thisray.rot = 1e-5; |
| 324 |
greg |
2.7 |
thisray.rod = 1.0; |
| 325 |
greg |
2.15 |
VCOPY(thisray.ron, dir); |
| 326 |
greg |
2.7 |
VSUM(thisray.rop, org, dir, 1e-4); |
| 327 |
|
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samplendx++; /* compute result */ |
| 328 |
|
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(*ofun[Lamb.otype].funp)(&Lamb, &thisray); |
| 329 |
greg |
2.1 |
} |
| 330 |
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| 331 |
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| 332 |
greg |
2.7 |
/* Evaluate radiance contributions */ |
| 333 |
greg |
2.1 |
static void |
| 334 |
greg |
2.7 |
eval_rad(FVECT org, FVECT dir, double dmax) |
| 335 |
greg |
2.1 |
{ |
| 336 |
|
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RAY thisray; |
| 337 |
|
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/* set up ray */ |
| 338 |
greg |
2.7 |
VCOPY(thisray.rorg, org); |
| 339 |
|
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VCOPY(thisray.rdir, dir); |
| 340 |
|
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thisray.rmax = dmax; |
| 341 |
greg |
2.1 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
| 342 |
|
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samplendx++; /* call ray evaluation */ |
| 343 |
|
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rayvalue(&thisray); |
| 344 |
|
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} |
| 345 |
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| 346 |
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| 347 |
|
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/* Accumulate and/or output ray contributions (child or only process) */ |
| 348 |
|
|
static void |
| 349 |
greg |
2.28 |
done_contrib(void) |
| 350 |
greg |
2.1 |
{ |
| 351 |
|
|
MODCONT *mp; |
| 352 |
|
|
int i; |
| 353 |
|
|
|
| 354 |
|
|
if (account <= 0 || --account) |
| 355 |
|
|
return; /* not time yet */ |
| 356 |
|
|
|
| 357 |
|
|
for (i = 0; i < nmods; i++) { /* output records & clear */ |
| 358 |
|
|
mp = (MODCONT *)lu_find(&modconttab,modname[i])->data; |
| 359 |
|
|
mod_output(mp); |
| 360 |
greg |
2.43 |
memset(mp->cbin, 0, DCOLORSIZ*mp->nbins); |
| 361 |
greg |
2.1 |
} |
| 362 |
|
|
end_record(); /* end lines & flush if time */ |
| 363 |
|
|
|
| 364 |
|
|
account = accumulate; /* reset accumulation counter */ |
| 365 |
|
|
} |
| 366 |
|
|
|
| 367 |
|
|
|
| 368 |
|
|
/* Principal calculation loop (called by main) */ |
| 369 |
|
|
void |
| 370 |
greg |
2.28 |
rcontrib(void) |
| 371 |
greg |
2.1 |
{ |
| 372 |
|
|
static int ignore_warning_given = 0; |
| 373 |
|
|
FVECT orig, direc; |
| 374 |
|
|
double d; |
| 375 |
greg |
2.2 |
/* initialize (& fork more of us) */ |
| 376 |
greg |
2.1 |
rcinit(); |
| 377 |
|
|
/* load rays from stdin & process */ |
| 378 |
|
|
#ifdef getc_unlocked |
| 379 |
greg |
2.2 |
flockfile(stdin); /* avoid mutex overhead */ |
| 380 |
greg |
2.1 |
#endif |
| 381 |
|
|
while (getvec(orig) == 0 && getvec(direc) == 0) { |
| 382 |
|
|
d = normalize(direc); |
| 383 |
greg |
2.17 |
if (nchild != -1 && (d == 0.0) & (accumulate == 0)) { |
| 384 |
greg |
2.1 |
if (!ignore_warning_given++) |
| 385 |
|
|
error(WARNING, |
| 386 |
|
|
"dummy ray(s) ignored during accumulation\n"); |
| 387 |
|
|
continue; |
| 388 |
|
|
} |
| 389 |
|
|
if (lastray+1 < lastray) |
| 390 |
|
|
lastray = lastdone = 0; |
| 391 |
|
|
++lastray; |
| 392 |
|
|
if (d == 0.0) { /* zero ==> flush */ |
| 393 |
greg |
2.18 |
if ((yres <= 0) | (xres <= 1)) |
| 394 |
greg |
2.17 |
waitflush = 1; /* flush after */ |
| 395 |
|
|
if (nchild == -1) |
| 396 |
|
|
account = 1; |
| 397 |
greg |
2.7 |
} else if (imm_irrad) { /* else compute */ |
| 398 |
|
|
eval_irrad(orig, direc); |
| 399 |
|
|
} else { |
| 400 |
|
|
eval_rad(orig, direc, lim_dist ? d : 0.0); |
| 401 |
greg |
2.1 |
} |
| 402 |
|
|
done_contrib(); /* accumulate/output */ |
| 403 |
|
|
++lastdone; |
| 404 |
greg |
2.37 |
if (!morays()) |
| 405 |
greg |
2.1 |
break; /* preemptive EOI */ |
| 406 |
|
|
} |
| 407 |
greg |
2.11 |
if (nchild != -1 && (accumulate <= 0) | (account < accumulate)) { |
| 408 |
greg |
2.1 |
if (account < accumulate) { |
| 409 |
|
|
error(WARNING, "partial accumulation in final record"); |
| 410 |
|
|
accumulate -= account; |
| 411 |
|
|
} |
| 412 |
|
|
account = 1; /* output accumulated totals */ |
| 413 |
|
|
done_contrib(); |
| 414 |
|
|
} |
| 415 |
greg |
2.9 |
lu_done(&ofiletab); /* close output files */ |
| 416 |
greg |
2.1 |
if (raysleft) |
| 417 |
|
|
error(USER, "unexpected EOF on input"); |
| 418 |
|
|
} |
