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root/radiance/ray/src/rt/rcontrib.c
Revision: 2.40
Committed: Tue Feb 16 20:06:06 2021 UTC (3 years, 2 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.39: +20 -18 lines
Log Message:
feat: removed upper limit on number of modifiers in rcontrib

File Contents

# User Rev Content
1 greg 2.1 #ifndef lint
2 greg 2.40 static const char RCSid[] = "$Id: rcontrib.c,v 2.39 2020/09/10 01:01:18 greg Exp $";
3 greg 2.1 #endif
4     /*
5     * Accumulate ray contributions for a set of materials
6     * Initialization and calculation routines
7     */
8    
9 greg 2.20 #include "copyright.h"
10    
11 greg 2.1 #include "rcontrib.h"
12     #include "otypes.h"
13 greg 2.14 #include "source.h"
14 greg 2.1
15 greg 2.2 char *shm_boundary = NULL; /* boundary of shared memory */
16    
17 greg 2.1 CUBE thescene; /* our scene */
18     OBJECT nsceneobjs; /* number of objects in our scene */
19    
20     int dimlist[MAXDIM]; /* sampling dimensions */
21     int ndims = 0; /* number of sampling dimensions */
22     int samplendx = 0; /* index for this sample */
23    
24 greg 2.33 void (*trace)() = NULL; /* trace call (NULL before rcinit) */
25 greg 2.1
26     int do_irrad = 0; /* compute irradiance? */
27    
28 greg 2.3 int rand_samp = 1; /* pure Monte Carlo sampling? */
29 greg 2.1
30 greg 2.8 double dstrsrc = 0.9; /* square source distribution */
31 greg 2.31 double shadthresh = 0.; /* shadow threshold */
32 greg 2.1 double shadcert = .75; /* shadow certainty */
33     int directrelay = 3; /* number of source relays */
34     int vspretest = 512; /* virtual source pretest density */
35     int directvis = 1; /* sources visible? */
36     double srcsizerat = .2; /* maximum ratio source size/dist. */
37    
38     COLOR cextinction = BLKCOLOR; /* global extinction coefficient */
39     COLOR salbedo = BLKCOLOR; /* global scattering albedo */
40     double seccg = 0.; /* global scattering eccentricity */
41     double ssampdist = 0.; /* scatter sampling distance */
42    
43 greg 2.30 double specthresh = .02; /* specular sampling threshold */
44 greg 2.1 double specjitter = 1.; /* specular sampling jitter */
45    
46     int backvis = 1; /* back face visibility */
47    
48 greg 2.3 int maxdepth = -10; /* maximum recursion depth */
49     double minweight = 2e-3; /* minimum ray weight */
50 greg 2.1
51     char *ambfile = NULL; /* ambient file name */
52     COLOR ambval = BLKCOLOR; /* ambient value */
53     int ambvwt = 0; /* initial weight for ambient value */
54 greg 2.31 double ambacc = 0.; /* ambient accuracy */
55 greg 2.1 int ambres = 256; /* ambient resolution */
56     int ambdiv = 350; /* ambient divisions */
57     int ambssamp = 0; /* ambient super-samples */
58     int ambounce = 1; /* ambient bounces */
59     char *amblist[AMBLLEN+1]; /* ambient include/exclude list */
60     int ambincl = -1; /* include == 1, exclude == 0 */
61    
62     int account; /* current accumulation count */
63     RNUMBER raysleft; /* number of rays left to trace */
64     long waitflush; /* how long until next flush */
65    
66 greg 2.4 RNUMBER lastray = 0; /* last ray number sent */
67     RNUMBER lastdone = 0; /* last ray output */
68 greg 2.1
69 greg 2.32 static void trace_contrib(RAY *r); /* our trace callback */
70    
71 greg 2.1 static void mcfree(void *p) { epfree((*(MODCONT *)p).binv); free(p); }
72    
73     LUTAB modconttab = LU_SINIT(NULL,mcfree); /* modifier lookup table */
74    
75     /************************** INITIALIZATION ROUTINES ***********************/
76    
77     char *
78     formstr( /* return format identifier */
79     int f
80     )
81     {
82     switch (f) {
83     case 'a': return("ascii");
84     case 'f': return("float");
85     case 'd': return("double");
86     case 'c': return(COLRFMT);
87     }
88     return("unknown");
89     }
90    
91    
92     /* Add modifier to our list to track */
93     MODCONT *
94 greg 2.20 addmodifier(char *modn, char *outf, char *prms, char *binv, int bincnt)
95 greg 2.1 {
96     LUENT *lep = lu_find(&modconttab,modn);
97     MODCONT *mp;
98     EPNODE *ebinv;
99     int i;
100    
101     if (lep->data != NULL) {
102     sprintf(errmsg, "duplicate modifier '%s'", modn);
103     error(USER, errmsg);
104     }
105 greg 2.26 if (!strcmp(modn, VOIDID)) {
106     sprintf(errmsg, "cannot track '%s' modifier", VOIDID);
107     error(USER, errmsg);
108     }
109 greg 2.40 if (nmods >= modasiz) { /* need bigger modifier array */
110     modasiz += modasiz/3 + 64;
111     if (modname == NULL)
112     modname = (char **)malloc(modasiz*sizeof(char *));
113     else
114     modname = (char **)realloc(modname, modasiz*sizeof(char *));
115     if (modname == NULL)
116     error(SYSTEM, "Out of memory in addmodifier()");
117     }
118 greg 2.1 modname[nmods++] = modn; /* XXX assumes static string */
119     lep->key = modn; /* XXX assumes static string */
120     if (binv == NULL)
121     binv = "0"; /* use single bin if unspecified */
122     ebinv = eparse(binv);
123     if (ebinv->type == NUM) { /* check value if constant */
124     bincnt = (int)(evalue(ebinv) + 1.5);
125     if (bincnt != 1) {
126     sprintf(errmsg, "illegal non-zero constant for bin (%s)",
127     binv);
128     error(USER, errmsg);
129     }
130     } else if (bincnt <= 0) {
131     sprintf(errmsg,
132     "unspecified or illegal bin count for modifier '%s'",
133     modn);
134     error(USER, errmsg);
135     }
136     /* initialize results holder */
137     mp = (MODCONT *)malloc(sizeof(MODCONT)+sizeof(DCOLOR)*(bincnt-1));
138     if (mp == NULL)
139     error(SYSTEM, "out of memory in addmodifier");
140     mp->outspec = outf; /* XXX assumes static string */
141     mp->modname = modn; /* XXX assumes static string */
142 greg 2.28 mp->params = prms; /* XXX assumes static string */
143 greg 2.1 mp->binv = ebinv;
144 greg 2.29 mp->bin0 = 0;
145 greg 2.1 mp->nbins = bincnt;
146     memset(mp->cbin, 0, sizeof(DCOLOR)*bincnt);
147 greg 2.29 /* figure out starting bin */
148     while (!getostream(mp->outspec, mp->modname, mp->bin0, 1))
149     mp->bin0++;
150     /* allocate other output streams */
151     for (i = 0; ++i < mp->nbins; )
152     getostream(mp->outspec, mp->modname, mp->bin0+i, 1);
153 greg 2.1 lep->data = (char *)mp;
154     return(mp);
155     }
156    
157    
158 greg 2.10 /* Add modifiers from a file list */
159 greg 2.1 void
160 greg 2.20 addmodfile(char *fname, char *outf, char *prms, char *binv, int bincnt)
161 greg 2.1 {
162 greg 2.40 char *path = getpath(fname, getrlibpath(), R_OK);
163     char mod[MAXSTR];
164     FILE *fp;
165    
166     if (path == NULL || (fp = fopen(path, "r")) == NULL) {
167     sprintf(errmsg, "cannot load modifier file '%s'",
168     path != NULL ? path : fname);
169 greg 2.1 error(SYSTEM, errmsg);
170     }
171 greg 2.40 while (fgetword(mod, sizeof(mod), fp) != NULL)
172     addmodifier(mod, outf, prms, binv, bincnt);
173     fclose(fp);
174 greg 2.1 }
175    
176    
177 greg 2.37 /* Check if we have any more rays left (and report progress) */
178     int
179     morays(void)
180     {
181     static RNUMBER total_rays;
182     static time_t tstart, last_report;
183     time_t tnow;
184    
185     if (!raysleft)
186     return(1); /* unknown total, so nothing to do or say */
187    
188     if (report_intvl > 0 && (tnow = time(0)) >= last_report+report_intvl) {
189     if (!total_rays) {
190     total_rays = raysleft;
191     tstart = tnow;
192 greg 2.39 } else {
193     sprintf(errmsg, "%.2f%% done after %.3f hours\n",
194     100.-100.*raysleft/total_rays,
195     (1./3600.)*(tnow - tstart));
196     eputs(errmsg);
197 greg 2.37 }
198     last_report = tnow;
199     }
200     return(--raysleft);
201     }
202    
203    
204     /* Quit program */
205 greg 2.1 void
206 greg 2.37 quit(
207 greg 2.1 int code
208     )
209     {
210     if (nchild > 0) /* close children if any */
211 greg 2.10 end_children(code != 0);
212 greg 2.36 else if (nchild < 0)
213     _exit(code); /* avoid flush() in child */
214 greg 2.1 exit(code);
215     }
216    
217    
218     /* Initialize our process(es) */
219     static void
220 greg 2.28 rcinit(void)
221 greg 2.1 {
222     int i;
223    
224     if (nproc > MAXPROCESS)
225     sprintf(errmsg, "too many processes requested -- reducing to %d",
226     nproc = MAXPROCESS);
227 greg 2.2 if (nproc > 1) {
228     preload_objs(); /* preload auxiliary data */
229     /* set shared memory boundary */
230     shm_boundary = strcpy((char *)malloc(16), "SHM_BOUNDARY");
231     }
232 greg 2.32 trace = trace_contrib; /* set up trace call-back */
233 greg 2.14 for (i = 0; i < nsources; i++) /* tracing to sources as well */
234     source[i].sflags |= SFOLLOW;
235 greg 2.1 if (yres > 0) { /* set up flushing & ray counts */
236     if (xres > 0)
237     raysleft = (RNUMBER)xres*yres;
238     else
239     raysleft = yres;
240     } else
241     raysleft = 0;
242     if ((account = accumulate) > 1)
243     raysleft *= accumulate;
244     waitflush = (yres > 0) & (xres > 1) ? 0 : xres;
245    
246 greg 2.5 if (nproc > 1 && in_rchild()) /* forked child? */
247 greg 2.1 return; /* return to main processing loop */
248    
249 greg 2.5 if (recover) { /* recover previous output? */
250 greg 2.8 if (accumulate <= 0)
251 greg 2.5 reload_output();
252 greg 2.8 else
253 greg 2.5 recover_output();
254     }
255     if (nproc == 1) /* single process? */
256     return;
257 greg 2.8 /* else run appropriate controller */
258     if (accumulate <= 0)
259     feeder_loop();
260     else
261     parental_loop();
262 greg 2.1 quit(0); /* parent musn't return! */
263     }
264    
265     /************************** MAIN CALCULATION PROCESS ***********************/
266    
267     /* Our trace call to sum contributions */
268     static void
269     trace_contrib(RAY *r)
270     {
271     MODCONT *mp;
272 greg 2.19 double bval;
273 greg 2.1 int bn;
274     RREAL contr[3];
275    
276 greg 2.6 if (r->ro == NULL || r->ro->omod == OVOID)
277 greg 2.1 return;
278 greg 2.20 /* shadow ray not on source? */
279     if (r->rsrc >= 0 && source[r->rsrc].so != r->ro)
280     return;
281 greg 2.1
282     mp = (MODCONT *)lu_find(&modconttab,objptr(r->ro->omod)->oname)->data;
283    
284 greg 2.6 if (mp == NULL) /* not in our list? */
285     return;
286 greg 2.1
287 greg 2.21 worldfunc(RCCONTEXT, r); /* else set context */
288 greg 2.22 set_eparams((char *)mp->params);
289 greg 2.21 if ((bval = evalue(mp->binv)) <= -.5) /* and get bin number */
290     return; /* silently ignore negatives */
291 greg 2.19 if ((bn = (int)(bval + .5)) >= mp->nbins) {
292 greg 2.23 sprintf(errmsg, "bad bin number (%d ignored)", bn);
293     error(WARNING, errmsg);
294 greg 2.1 return;
295     }
296 greg 2.14 raycontrib(contr, r, PRIMARY); /* compute coefficient */
297 greg 2.1 if (contrib)
298 greg 2.14 multcolor(contr, r->rcol); /* -> contribution */
299 greg 2.1 addcolor(mp->cbin[bn], contr);
300     }
301    
302    
303 greg 2.7 /* Evaluate irradiance contributions */
304 greg 2.1 static void
305 greg 2.7 eval_irrad(FVECT org, FVECT dir)
306 greg 2.1 {
307 greg 2.7 RAY thisray;
308    
309     VSUM(thisray.rorg, org, dir, 1.1e-4);
310     thisray.rdir[0] = -dir[0];
311     thisray.rdir[1] = -dir[1];
312     thisray.rdir[2] = -dir[2];
313     thisray.rmax = 0.0;
314     rayorigin(&thisray, PRIMARY, NULL, NULL);
315 greg 2.16 /* pretend we hit surface */
316 greg 2.35 thisray.rxt = thisray.rot = 1e-5;
317 greg 2.7 thisray.rod = 1.0;
318 greg 2.15 VCOPY(thisray.ron, dir);
319 greg 2.7 VSUM(thisray.rop, org, dir, 1e-4);
320     samplendx++; /* compute result */
321     (*ofun[Lamb.otype].funp)(&Lamb, &thisray);
322 greg 2.1 }
323    
324    
325 greg 2.7 /* Evaluate radiance contributions */
326 greg 2.1 static void
327 greg 2.7 eval_rad(FVECT org, FVECT dir, double dmax)
328 greg 2.1 {
329     RAY thisray;
330     /* set up ray */
331 greg 2.7 VCOPY(thisray.rorg, org);
332     VCOPY(thisray.rdir, dir);
333     thisray.rmax = dmax;
334 greg 2.1 rayorigin(&thisray, PRIMARY, NULL, NULL);
335     samplendx++; /* call ray evaluation */
336     rayvalue(&thisray);
337     }
338    
339    
340     /* Accumulate and/or output ray contributions (child or only process) */
341     static void
342 greg 2.28 done_contrib(void)
343 greg 2.1 {
344     MODCONT *mp;
345     int i;
346    
347     if (account <= 0 || --account)
348     return; /* not time yet */
349    
350     for (i = 0; i < nmods; i++) { /* output records & clear */
351     mp = (MODCONT *)lu_find(&modconttab,modname[i])->data;
352     mod_output(mp);
353     memset(mp->cbin, 0, sizeof(DCOLOR)*mp->nbins);
354     }
355     end_record(); /* end lines & flush if time */
356    
357     account = accumulate; /* reset accumulation counter */
358     }
359    
360    
361     /* Principal calculation loop (called by main) */
362     void
363 greg 2.28 rcontrib(void)
364 greg 2.1 {
365     static int ignore_warning_given = 0;
366     FVECT orig, direc;
367     double d;
368 greg 2.2 /* initialize (& fork more of us) */
369 greg 2.1 rcinit();
370     /* load rays from stdin & process */
371     #ifdef getc_unlocked
372 greg 2.2 flockfile(stdin); /* avoid mutex overhead */
373 greg 2.1 #endif
374     while (getvec(orig) == 0 && getvec(direc) == 0) {
375     d = normalize(direc);
376 greg 2.17 if (nchild != -1 && (d == 0.0) & (accumulate == 0)) {
377 greg 2.1 if (!ignore_warning_given++)
378     error(WARNING,
379     "dummy ray(s) ignored during accumulation\n");
380     continue;
381     }
382     if (lastray+1 < lastray)
383     lastray = lastdone = 0;
384     ++lastray;
385     if (d == 0.0) { /* zero ==> flush */
386 greg 2.18 if ((yres <= 0) | (xres <= 1))
387 greg 2.17 waitflush = 1; /* flush after */
388     if (nchild == -1)
389     account = 1;
390 greg 2.7 } else if (imm_irrad) { /* else compute */
391     eval_irrad(orig, direc);
392     } else {
393     eval_rad(orig, direc, lim_dist ? d : 0.0);
394 greg 2.1 }
395     done_contrib(); /* accumulate/output */
396     ++lastdone;
397 greg 2.37 if (!morays())
398 greg 2.1 break; /* preemptive EOI */
399     }
400 greg 2.11 if (nchild != -1 && (accumulate <= 0) | (account < accumulate)) {
401 greg 2.1 if (account < accumulate) {
402     error(WARNING, "partial accumulation in final record");
403     accumulate -= account;
404     }
405     account = 1; /* output accumulated totals */
406     done_contrib();
407     }
408 greg 2.9 lu_done(&ofiletab); /* close output files */
409 greg 2.1 if (raysleft)
410     error(USER, "unexpected EOF on input");
411     }