| 1 |
greg |
2.1 |
#ifndef lint |
| 2 |
greg |
2.22 |
static const char RCSid[] = "$Id: rcontrib.c,v 2.21 2014/07/19 18:39:35 greg Exp $"; |
| 3 |
greg |
2.1 |
#endif |
| 4 |
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/* |
| 5 |
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* Accumulate ray contributions for a set of materials |
| 6 |
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* Initialization and calculation routines |
| 7 |
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*/ |
| 8 |
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| 9 |
greg |
2.20 |
#include "copyright.h" |
| 10 |
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| 11 |
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#include <ctype.h> |
| 12 |
greg |
2.1 |
#include "rcontrib.h" |
| 13 |
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#include "otypes.h" |
| 14 |
greg |
2.14 |
#include "source.h" |
| 15 |
greg |
2.1 |
|
| 16 |
greg |
2.2 |
char *shm_boundary = NULL; /* boundary of shared memory */ |
| 17 |
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| 18 |
greg |
2.1 |
CUBE thescene; /* our scene */ |
| 19 |
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OBJECT nsceneobjs; /* number of objects in our scene */ |
| 20 |
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| 21 |
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int dimlist[MAXDIM]; /* sampling dimensions */ |
| 22 |
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int ndims = 0; /* number of sampling dimensions */ |
| 23 |
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int samplendx = 0; /* index for this sample */ |
| 24 |
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| 25 |
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static void trace_contrib(RAY *r); /* our trace callback */ |
| 26 |
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void (*trace)() = trace_contrib; |
| 27 |
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| 28 |
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int do_irrad = 0; /* compute irradiance? */ |
| 29 |
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| 30 |
greg |
2.3 |
int rand_samp = 1; /* pure Monte Carlo sampling? */ |
| 31 |
greg |
2.1 |
|
| 32 |
greg |
2.8 |
double dstrsrc = 0.9; /* square source distribution */ |
| 33 |
greg |
2.1 |
double shadthresh = .03; /* shadow threshold */ |
| 34 |
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double shadcert = .75; /* shadow certainty */ |
| 35 |
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int directrelay = 3; /* number of source relays */ |
| 36 |
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int vspretest = 512; /* virtual source pretest density */ |
| 37 |
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int directvis = 1; /* sources visible? */ |
| 38 |
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double srcsizerat = .2; /* maximum ratio source size/dist. */ |
| 39 |
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| 40 |
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COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
| 41 |
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COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
| 42 |
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double seccg = 0.; /* global scattering eccentricity */ |
| 43 |
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double ssampdist = 0.; /* scatter sampling distance */ |
| 44 |
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| 45 |
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double specthresh = .15; /* specular sampling threshold */ |
| 46 |
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double specjitter = 1.; /* specular sampling jitter */ |
| 47 |
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| 48 |
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int backvis = 1; /* back face visibility */ |
| 49 |
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| 50 |
greg |
2.3 |
int maxdepth = -10; /* maximum recursion depth */ |
| 51 |
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double minweight = 2e-3; /* minimum ray weight */ |
| 52 |
greg |
2.1 |
|
| 53 |
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char *ambfile = NULL; /* ambient file name */ |
| 54 |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
| 55 |
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int ambvwt = 0; /* initial weight for ambient value */ |
| 56 |
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double ambacc = 0; /* ambient accuracy */ |
| 57 |
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int ambres = 256; /* ambient resolution */ |
| 58 |
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int ambdiv = 350; /* ambient divisions */ |
| 59 |
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int ambssamp = 0; /* ambient super-samples */ |
| 60 |
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int ambounce = 1; /* ambient bounces */ |
| 61 |
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char *amblist[AMBLLEN+1]; /* ambient include/exclude list */ |
| 62 |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
| 63 |
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| 64 |
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int account; /* current accumulation count */ |
| 65 |
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RNUMBER raysleft; /* number of rays left to trace */ |
| 66 |
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long waitflush; /* how long until next flush */ |
| 67 |
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| 68 |
greg |
2.4 |
RNUMBER lastray = 0; /* last ray number sent */ |
| 69 |
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RNUMBER lastdone = 0; /* last ray output */ |
| 70 |
greg |
2.1 |
|
| 71 |
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static void mcfree(void *p) { epfree((*(MODCONT *)p).binv); free(p); } |
| 72 |
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| 73 |
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LUTAB modconttab = LU_SINIT(NULL,mcfree); /* modifier lookup table */ |
| 74 |
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| 75 |
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/************************** INITIALIZATION ROUTINES ***********************/ |
| 76 |
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| 77 |
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char * |
| 78 |
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formstr( /* return format identifier */ |
| 79 |
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int f |
| 80 |
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) |
| 81 |
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{ |
| 82 |
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switch (f) { |
| 83 |
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case 'a': return("ascii"); |
| 84 |
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case 'f': return("float"); |
| 85 |
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case 'd': return("double"); |
| 86 |
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case 'c': return(COLRFMT); |
| 87 |
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} |
| 88 |
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return("unknown"); |
| 89 |
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} |
| 90 |
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| 91 |
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| 92 |
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/* Add modifier to our list to track */ |
| 93 |
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MODCONT * |
| 94 |
greg |
2.20 |
addmodifier(char *modn, char *outf, char *prms, char *binv, int bincnt) |
| 95 |
greg |
2.1 |
{ |
| 96 |
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LUENT *lep = lu_find(&modconttab,modn); |
| 97 |
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MODCONT *mp; |
| 98 |
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EPNODE *ebinv; |
| 99 |
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int i; |
| 100 |
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| 101 |
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if (lep->data != NULL) { |
| 102 |
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sprintf(errmsg, "duplicate modifier '%s'", modn); |
| 103 |
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error(USER, errmsg); |
| 104 |
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} |
| 105 |
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if (nmods >= MAXMODLIST) |
| 106 |
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error(INTERNAL, "too many modifiers"); |
| 107 |
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modname[nmods++] = modn; /* XXX assumes static string */ |
| 108 |
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lep->key = modn; /* XXX assumes static string */ |
| 109 |
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if (binv == NULL) |
| 110 |
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binv = "0"; /* use single bin if unspecified */ |
| 111 |
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ebinv = eparse(binv); |
| 112 |
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if (ebinv->type == NUM) { /* check value if constant */ |
| 113 |
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bincnt = (int)(evalue(ebinv) + 1.5); |
| 114 |
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if (bincnt != 1) { |
| 115 |
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sprintf(errmsg, "illegal non-zero constant for bin (%s)", |
| 116 |
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binv); |
| 117 |
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error(USER, errmsg); |
| 118 |
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} |
| 119 |
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} else if (bincnt <= 0) { |
| 120 |
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sprintf(errmsg, |
| 121 |
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"unspecified or illegal bin count for modifier '%s'", |
| 122 |
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modn); |
| 123 |
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error(USER, errmsg); |
| 124 |
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} |
| 125 |
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/* initialize results holder */ |
| 126 |
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mp = (MODCONT *)malloc(sizeof(MODCONT)+sizeof(DCOLOR)*(bincnt-1)); |
| 127 |
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if (mp == NULL) |
| 128 |
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error(SYSTEM, "out of memory in addmodifier"); |
| 129 |
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mp->outspec = outf; /* XXX assumes static string */ |
| 130 |
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mp->modname = modn; /* XXX assumes static string */ |
| 131 |
greg |
2.20 |
mp->params = prms; |
| 132 |
greg |
2.1 |
mp->binv = ebinv; |
| 133 |
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mp->nbins = bincnt; |
| 134 |
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memset(mp->cbin, 0, sizeof(DCOLOR)*bincnt); |
| 135 |
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/* allocate output streams */ |
| 136 |
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for (i = bincnt; i-- > 0; ) |
| 137 |
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getostream(mp->outspec, mp->modname, i, 1); |
| 138 |
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lep->data = (char *)mp; |
| 139 |
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return(mp); |
| 140 |
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} |
| 141 |
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| 142 |
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| 143 |
greg |
2.10 |
/* Add modifiers from a file list */ |
| 144 |
greg |
2.1 |
void |
| 145 |
greg |
2.20 |
addmodfile(char *fname, char *outf, char *prms, char *binv, int bincnt) |
| 146 |
greg |
2.1 |
{ |
| 147 |
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char *mname[MAXMODLIST]; |
| 148 |
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int i; |
| 149 |
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/* find the file & store strings */ |
| 150 |
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if (wordfile(mname, getpath(fname, getrlibpath(), R_OK)) < 0) { |
| 151 |
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sprintf(errmsg, "cannot find modifier file '%s'", fname); |
| 152 |
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error(SYSTEM, errmsg); |
| 153 |
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} |
| 154 |
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for (i = 0; mname[i]; i++) /* add each one */ |
| 155 |
greg |
2.20 |
addmodifier(mname[i], outf, prms, binv, bincnt); |
| 156 |
greg |
2.1 |
} |
| 157 |
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| 158 |
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| 159 |
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void |
| 160 |
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quit( /* quit program */ |
| 161 |
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int code |
| 162 |
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) |
| 163 |
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{ |
| 164 |
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if (nchild > 0) /* close children if any */ |
| 165 |
greg |
2.10 |
end_children(code != 0); |
| 166 |
greg |
2.1 |
exit(code); |
| 167 |
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} |
| 168 |
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| 169 |
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| 170 |
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/* Initialize our process(es) */ |
| 171 |
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static void |
| 172 |
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rcinit() |
| 173 |
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{ |
| 174 |
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int i; |
| 175 |
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| 176 |
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if (nproc > MAXPROCESS) |
| 177 |
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sprintf(errmsg, "too many processes requested -- reducing to %d", |
| 178 |
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nproc = MAXPROCESS); |
| 179 |
greg |
2.2 |
if (nproc > 1) { |
| 180 |
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preload_objs(); /* preload auxiliary data */ |
| 181 |
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/* set shared memory boundary */ |
| 182 |
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shm_boundary = strcpy((char *)malloc(16), "SHM_BOUNDARY"); |
| 183 |
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} |
| 184 |
greg |
2.14 |
for (i = 0; i < nsources; i++) /* tracing to sources as well */ |
| 185 |
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source[i].sflags |= SFOLLOW; |
| 186 |
greg |
2.1 |
if (yres > 0) { /* set up flushing & ray counts */ |
| 187 |
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if (xres > 0) |
| 188 |
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raysleft = (RNUMBER)xres*yres; |
| 189 |
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else |
| 190 |
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raysleft = yres; |
| 191 |
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} else |
| 192 |
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raysleft = 0; |
| 193 |
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if ((account = accumulate) > 1) |
| 194 |
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raysleft *= accumulate; |
| 195 |
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waitflush = (yres > 0) & (xres > 1) ? 0 : xres; |
| 196 |
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| 197 |
greg |
2.5 |
if (nproc > 1 && in_rchild()) /* forked child? */ |
| 198 |
greg |
2.1 |
return; /* return to main processing loop */ |
| 199 |
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| 200 |
greg |
2.5 |
if (recover) { /* recover previous output? */ |
| 201 |
greg |
2.8 |
if (accumulate <= 0) |
| 202 |
greg |
2.5 |
reload_output(); |
| 203 |
greg |
2.8 |
else |
| 204 |
greg |
2.5 |
recover_output(); |
| 205 |
|
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} |
| 206 |
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if (nproc == 1) /* single process? */ |
| 207 |
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return; |
| 208 |
greg |
2.8 |
/* else run appropriate controller */ |
| 209 |
|
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if (accumulate <= 0) |
| 210 |
|
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feeder_loop(); |
| 211 |
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else |
| 212 |
|
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parental_loop(); |
| 213 |
greg |
2.1 |
quit(0); /* parent musn't return! */ |
| 214 |
|
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} |
| 215 |
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| 216 |
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/************************** MAIN CALCULATION PROCESS ***********************/ |
| 217 |
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| 218 |
greg |
2.20 |
/* Set parameters for current bin evaluation */ |
| 219 |
greg |
2.22 |
void |
| 220 |
greg |
2.20 |
set_eparams(char *prms) |
| 221 |
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{ |
| 222 |
greg |
2.22 |
static char *last_params = NULL; |
| 223 |
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char vname[RMAXWORD]; |
| 224 |
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double value; |
| 225 |
|
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char *cpd; |
| 226 |
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/* check if already set */ |
| 227 |
|
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if ((prms == NULL) | (prms == last_params)) |
| 228 |
|
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return; |
| 229 |
|
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if (last_params != NULL && !strcmp(prms, last_params)) |
| 230 |
|
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return; |
| 231 |
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last_params = prms; /* assign each variable */ |
| 232 |
|
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while (*prms) { |
| 233 |
|
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if (isspace(*prms)) { |
| 234 |
|
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++prms; continue; |
| 235 |
|
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} |
| 236 |
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if (!isalpha(*prms)) |
| 237 |
greg |
2.20 |
goto bad_params; |
| 238 |
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cpd = vname; |
| 239 |
greg |
2.22 |
while (*prms && (*prms != '=') & !isspace(*prms)) { |
| 240 |
|
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if (!isid(*prms)) |
| 241 |
greg |
2.20 |
goto bad_params; |
| 242 |
greg |
2.22 |
*cpd++ = *prms++; |
| 243 |
greg |
2.20 |
} |
| 244 |
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if (cpd == vname) |
| 245 |
|
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goto bad_params; |
| 246 |
|
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*cpd = '\0'; |
| 247 |
greg |
2.22 |
while (isspace(*prms)) prms++; |
| 248 |
|
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if (*prms++ != '=') |
| 249 |
greg |
2.20 |
goto bad_params; |
| 250 |
greg |
2.22 |
value = atof(prms); |
| 251 |
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if ((prms = fskip(prms)) == NULL) |
| 252 |
greg |
2.20 |
goto bad_params; |
| 253 |
greg |
2.22 |
while (isspace(*prms)) prms++; |
| 254 |
|
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prms += (*prms == ',') | (*prms == ';'); |
| 255 |
greg |
2.20 |
varset(vname, '=', value); |
| 256 |
|
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} |
| 257 |
|
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return; |
| 258 |
|
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bad_params: |
| 259 |
greg |
2.22 |
sprintf(errmsg, "bad parameter list '%s'", last_params); |
| 260 |
greg |
2.20 |
error(USER, errmsg); |
| 261 |
|
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} |
| 262 |
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| 263 |
greg |
2.22 |
|
| 264 |
greg |
2.1 |
/* Our trace call to sum contributions */ |
| 265 |
|
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static void |
| 266 |
|
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trace_contrib(RAY *r) |
| 267 |
|
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{ |
| 268 |
|
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MODCONT *mp; |
| 269 |
greg |
2.19 |
double bval; |
| 270 |
greg |
2.1 |
int bn; |
| 271 |
|
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RREAL contr[3]; |
| 272 |
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| 273 |
greg |
2.6 |
if (r->ro == NULL || r->ro->omod == OVOID) |
| 274 |
greg |
2.1 |
return; |
| 275 |
greg |
2.20 |
/* shadow ray not on source? */ |
| 276 |
|
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if (r->rsrc >= 0 && source[r->rsrc].so != r->ro) |
| 277 |
|
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return; |
| 278 |
greg |
2.1 |
|
| 279 |
|
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mp = (MODCONT *)lu_find(&modconttab,objptr(r->ro->omod)->oname)->data; |
| 280 |
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| 281 |
greg |
2.6 |
if (mp == NULL) /* not in our list? */ |
| 282 |
|
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return; |
| 283 |
greg |
2.1 |
|
| 284 |
greg |
2.21 |
worldfunc(RCCONTEXT, r); /* else set context */ |
| 285 |
greg |
2.22 |
set_eparams((char *)mp->params); |
| 286 |
greg |
2.21 |
if ((bval = evalue(mp->binv)) <= -.5) /* and get bin number */ |
| 287 |
|
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return; /* silently ignore negatives */ |
| 288 |
greg |
2.19 |
if ((bn = (int)(bval + .5)) >= mp->nbins) { |
| 289 |
greg |
2.1 |
error(WARNING, "bad bin number (ignored)"); |
| 290 |
|
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return; |
| 291 |
|
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} |
| 292 |
greg |
2.14 |
raycontrib(contr, r, PRIMARY); /* compute coefficient */ |
| 293 |
greg |
2.1 |
if (contrib) |
| 294 |
greg |
2.14 |
multcolor(contr, r->rcol); /* -> contribution */ |
| 295 |
greg |
2.1 |
addcolor(mp->cbin[bn], contr); |
| 296 |
|
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} |
| 297 |
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| 298 |
|
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|
| 299 |
greg |
2.7 |
/* Evaluate irradiance contributions */ |
| 300 |
greg |
2.1 |
static void |
| 301 |
greg |
2.7 |
eval_irrad(FVECT org, FVECT dir) |
| 302 |
greg |
2.1 |
{ |
| 303 |
greg |
2.7 |
RAY thisray; |
| 304 |
|
|
|
| 305 |
|
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VSUM(thisray.rorg, org, dir, 1.1e-4); |
| 306 |
|
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thisray.rdir[0] = -dir[0]; |
| 307 |
|
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thisray.rdir[1] = -dir[1]; |
| 308 |
|
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thisray.rdir[2] = -dir[2]; |
| 309 |
|
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thisray.rmax = 0.0; |
| 310 |
|
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rayorigin(&thisray, PRIMARY, NULL, NULL); |
| 311 |
greg |
2.16 |
/* pretend we hit surface */ |
| 312 |
|
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thisray.rt = thisray.rot = 1e-5; |
| 313 |
greg |
2.7 |
thisray.rod = 1.0; |
| 314 |
greg |
2.15 |
VCOPY(thisray.ron, dir); |
| 315 |
greg |
2.7 |
VSUM(thisray.rop, org, dir, 1e-4); |
| 316 |
|
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samplendx++; /* compute result */ |
| 317 |
|
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(*ofun[Lamb.otype].funp)(&Lamb, &thisray); |
| 318 |
greg |
2.1 |
} |
| 319 |
|
|
|
| 320 |
|
|
|
| 321 |
greg |
2.7 |
/* Evaluate radiance contributions */ |
| 322 |
greg |
2.1 |
static void |
| 323 |
greg |
2.7 |
eval_rad(FVECT org, FVECT dir, double dmax) |
| 324 |
greg |
2.1 |
{ |
| 325 |
|
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RAY thisray; |
| 326 |
|
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/* set up ray */ |
| 327 |
greg |
2.7 |
VCOPY(thisray.rorg, org); |
| 328 |
|
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VCOPY(thisray.rdir, dir); |
| 329 |
|
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thisray.rmax = dmax; |
| 330 |
greg |
2.1 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
| 331 |
|
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samplendx++; /* call ray evaluation */ |
| 332 |
|
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rayvalue(&thisray); |
| 333 |
|
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} |
| 334 |
|
|
|
| 335 |
|
|
|
| 336 |
|
|
/* Accumulate and/or output ray contributions (child or only process) */ |
| 337 |
|
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static void |
| 338 |
|
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done_contrib() |
| 339 |
|
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{ |
| 340 |
|
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MODCONT *mp; |
| 341 |
|
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int i; |
| 342 |
|
|
|
| 343 |
|
|
if (account <= 0 || --account) |
| 344 |
|
|
return; /* not time yet */ |
| 345 |
|
|
|
| 346 |
|
|
for (i = 0; i < nmods; i++) { /* output records & clear */ |
| 347 |
|
|
mp = (MODCONT *)lu_find(&modconttab,modname[i])->data; |
| 348 |
|
|
mod_output(mp); |
| 349 |
|
|
memset(mp->cbin, 0, sizeof(DCOLOR)*mp->nbins); |
| 350 |
|
|
} |
| 351 |
|
|
end_record(); /* end lines & flush if time */ |
| 352 |
|
|
|
| 353 |
|
|
account = accumulate; /* reset accumulation counter */ |
| 354 |
|
|
} |
| 355 |
|
|
|
| 356 |
|
|
|
| 357 |
|
|
/* Principal calculation loop (called by main) */ |
| 358 |
|
|
void |
| 359 |
|
|
rcontrib() |
| 360 |
|
|
{ |
| 361 |
|
|
static int ignore_warning_given = 0; |
| 362 |
|
|
FVECT orig, direc; |
| 363 |
|
|
double d; |
| 364 |
greg |
2.2 |
/* initialize (& fork more of us) */ |
| 365 |
greg |
2.1 |
rcinit(); |
| 366 |
|
|
/* load rays from stdin & process */ |
| 367 |
|
|
#ifdef getc_unlocked |
| 368 |
greg |
2.2 |
flockfile(stdin); /* avoid mutex overhead */ |
| 369 |
greg |
2.1 |
#endif |
| 370 |
|
|
while (getvec(orig) == 0 && getvec(direc) == 0) { |
| 371 |
|
|
d = normalize(direc); |
| 372 |
greg |
2.17 |
if (nchild != -1 && (d == 0.0) & (accumulate == 0)) { |
| 373 |
greg |
2.1 |
if (!ignore_warning_given++) |
| 374 |
|
|
error(WARNING, |
| 375 |
|
|
"dummy ray(s) ignored during accumulation\n"); |
| 376 |
|
|
continue; |
| 377 |
|
|
} |
| 378 |
|
|
if (lastray+1 < lastray) |
| 379 |
|
|
lastray = lastdone = 0; |
| 380 |
|
|
++lastray; |
| 381 |
|
|
if (d == 0.0) { /* zero ==> flush */ |
| 382 |
greg |
2.18 |
if ((yres <= 0) | (xres <= 1)) |
| 383 |
greg |
2.17 |
waitflush = 1; /* flush after */ |
| 384 |
|
|
if (nchild == -1) |
| 385 |
|
|
account = 1; |
| 386 |
greg |
2.7 |
} else if (imm_irrad) { /* else compute */ |
| 387 |
|
|
eval_irrad(orig, direc); |
| 388 |
|
|
} else { |
| 389 |
|
|
eval_rad(orig, direc, lim_dist ? d : 0.0); |
| 390 |
greg |
2.1 |
} |
| 391 |
|
|
done_contrib(); /* accumulate/output */ |
| 392 |
|
|
++lastdone; |
| 393 |
|
|
if (raysleft && !--raysleft) |
| 394 |
|
|
break; /* preemptive EOI */ |
| 395 |
|
|
} |
| 396 |
greg |
2.11 |
if (nchild != -1 && (accumulate <= 0) | (account < accumulate)) { |
| 397 |
greg |
2.1 |
if (account < accumulate) { |
| 398 |
|
|
error(WARNING, "partial accumulation in final record"); |
| 399 |
|
|
accumulate -= account; |
| 400 |
|
|
} |
| 401 |
|
|
account = 1; /* output accumulated totals */ |
| 402 |
|
|
done_contrib(); |
| 403 |
|
|
} |
| 404 |
greg |
2.9 |
lu_done(&ofiletab); /* close output files */ |
| 405 |
greg |
2.1 |
if (raysleft) |
| 406 |
|
|
error(USER, "unexpected EOF on input"); |
| 407 |
|
|
} |
