4 |
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|
5 |
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/* |
6 |
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====================================================================== |
7 |
< |
Photon map support for building light source contributions |
7 |
> |
Photon map for light source contributions |
8 |
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|
9 |
|
Roland Schregle (roland.schregle@{hslu.ch, gmail.com}) |
10 |
|
(c) Lucerne University of Applied Sciences and Arts, |
23 |
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#include "pmapdiag.h" |
24 |
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#include "rcontrib.h" |
25 |
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#include "otypes.h" |
26 |
< |
#include <sys/mman.h> |
27 |
< |
#include <sys/wait.h> |
26 |
> |
#include "otspecial.h" |
27 |
> |
#if NIX |
28 |
> |
#include <sys/mman.h> |
29 |
> |
#include <sys/wait.h> |
30 |
> |
#endif |
31 |
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|
32 |
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|
30 |
– |
|
33 |
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static PhotonPrimaryIdx newPhotonPrimary (PhotonMap *pmap, |
34 |
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const RAY *primRay, |
35 |
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FILE *primHeap) |
44 |
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return 0; |
45 |
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|
46 |
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/* Check if last primary ray has spawned photons (srcIdx >= 0, see |
47 |
< |
* newPhoton()), in which case we write it to the primary heap file |
48 |
< |
* before overwriting it */ |
47 |
> |
* newPhoton()), in which case we save it to the primary heap file |
48 |
> |
* before clobbering it */ |
49 |
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if (pmap -> lastPrimary.srcIdx >= 0) { |
50 |
|
if (!fwrite(&pmap -> lastPrimary, sizeof(PhotonPrimary), 1, primHeap)) |
51 |
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error(SYSTEM, "failed writing photon primary in newPhotonPrimary"); |
61 |
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|
62 |
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if (primRay) { |
63 |
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FVECT dvec; |
64 |
< |
|
64 |
> |
|
65 |
> |
#ifdef PMAP_PRIMARYDIR |
66 |
|
/* Reverse incident direction to point to light source */ |
67 |
|
dvec [0] = -primRay -> rdir [0]; |
68 |
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dvec [1] = -primRay -> rdir [1]; |
69 |
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dvec [2] = -primRay -> rdir [2]; |
70 |
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pmap -> lastPrimary.dir = encodedir(dvec); |
71 |
+ |
#endif |
72 |
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#ifdef PMAP_PRIMARYPOS |
73 |
|
VCOPY(pmap -> lastPrimary.pos, primRay -> rop); |
74 |
|
#endif |
79 |
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|
80 |
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|
81 |
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|
82 |
< |
#ifdef DEBUG_PMAP_CONTRIB |
82 |
> |
#ifdef DEBUG_PMAP |
83 |
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static int checkPrimaryHeap (FILE *file) |
84 |
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/* Check heap for ordered primaries */ |
85 |
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{ |
119 |
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|
120 |
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|
121 |
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static PhotonPrimaryIdx buildPrimaries (PhotonMap *pmap, FILE **primaryHeap, |
122 |
+ |
char **primaryHeapFname, |
123 |
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PhotonPrimaryIdx *primaryOfs, |
124 |
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unsigned numHeaps) |
125 |
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/* Consolidate per-subprocess photon primary heaps into the primary array |
137 |
|
for (heap = 0; heap < numHeaps; heap++) { |
138 |
|
primaryOfs [heap] = pmap -> numPrimary; |
139 |
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|
140 |
< |
if (fseek(primaryHeap [heap], 0, SEEK_END)) |
140 |
> |
if (fseek(primaryHeap [heap], 0, SEEK_END) < 0) |
141 |
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error(SYSTEM, "failed photon primary seek in buildPrimaries"); |
142 |
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pmap -> numPrimary += heapLen = ftell(primaryHeap [heap]) / |
143 |
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sizeof(PhotonPrimary); |
153 |
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heapLen, primaryHeap [heap]) != heapLen) |
154 |
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error(SYSTEM, "failed reading photon primaries in buildPrimaries"); |
155 |
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|
156 |
< |
fclose(primaryHeap [heap]); |
156 |
> |
fclose(primaryHeap [heap]); |
157 |
> |
unlink(primaryHeapFname [heap]); |
158 |
|
} |
159 |
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|
160 |
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return pmap -> numPrimary; |
173 |
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|
174 |
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|
175 |
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|
176 |
+ |
|
177 |
+ |
|
178 |
+ |
|
179 |
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void distribPhotonContrib (PhotonMap* pm, unsigned numProc) |
180 |
|
{ |
181 |
|
EmissionMap emap; |
182 |
< |
char errmsg2 [128], shmFname [255]; |
182 |
> |
char errmsg2 [128], shmFname [PMAP_TMPFNLEN]; |
183 |
|
unsigned srcIdx, proc; |
184 |
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int shmFile, stat, pid; |
185 |
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double *srcFlux, /* Emitted flux per light source */ |
186 |
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srcDistribTarget; /* Target photon count per source */ |
187 |
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PhotonContribCnt *photonCnt; /* Photon emission counter array */ |
188 |
< |
const unsigned photonCntSize = sizeof(PhotonContribCnt) * |
188 |
> |
unsigned photonCntSize = sizeof(PhotonContribCnt) * |
189 |
|
PHOTONCNT_NUMEMIT(nsources); |
190 |
< |
FILE *primaryHeap [numProc]; |
191 |
< |
PhotonPrimaryIdx primaryOfs [numProc]; |
190 |
> |
FILE **primaryHeap = NULL; |
191 |
> |
char **primaryHeapFname = NULL; |
192 |
> |
PhotonPrimaryIdx *primaryOfs = NULL; |
193 |
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|
194 |
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if (!pm) |
195 |
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error(USER, "no photon map defined in distribPhotonContrib"); |
197 |
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if (!nsources) |
198 |
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error(USER, "no light sources in distribPhotonContrib"); |
199 |
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|
190 |
– |
if (nsources > MAXMODLIST) |
191 |
– |
error(USER, "too many light sources in distribPhotonContrib"); |
192 |
– |
|
200 |
|
/* Allocate photon flux per light source; this differs for every |
201 |
|
* source as all sources contribute the same number of distributed |
202 |
|
* photons (srcDistribTarget), hence the number of photons emitted per |
223 |
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|
224 |
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/* Per-subprocess / per-source target counts */ |
225 |
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pm -> distribTarget /= numProc; |
226 |
< |
srcDistribTarget = nsources ? (double)pm -> distribTarget / nsources : 0; |
226 |
> |
srcDistribTarget = nsources ? (double)pm -> distribTarget / nsources : 0; |
227 |
|
|
228 |
< |
/* Get photon ports if specified */ |
229 |
< |
if (ambincl == 1) |
230 |
< |
getPhotonPorts(); |
228 |
> |
if (!pm -> distribTarget) |
229 |
> |
error(INTERNAL, "no photons to distribute in distribPhotonContrib"); |
230 |
> |
|
231 |
> |
/* Get photon ports from modifier list */ |
232 |
> |
getPhotonPorts(photonPortList); |
233 |
|
|
234 |
|
/* Get photon sensor modifiers */ |
235 |
|
getPhotonSensors(photonSensorList); |
236 |
< |
|
236 |
> |
|
237 |
> |
#if NIX |
238 |
|
/* Set up shared mem for photon counters (zeroed by ftruncate) */ |
239 |
< |
#if 0 |
230 |
< |
snprintf(shmFname, 255, PMAP_SHMFNAME, getpid()); |
231 |
< |
shmFile = shm_open(shmFname, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR); |
232 |
< |
#else |
233 |
< |
strcpy(shmFname, PMAP_SHMFNAME); |
239 |
> |
strcpy(shmFname, PMAP_TMPFNAME); |
240 |
|
shmFile = mkstemp(shmFname); |
235 |
– |
#endif |
241 |
|
|
242 |
|
if (shmFile < 0 || ftruncate(shmFile, photonCntSize) < 0) |
243 |
|
error(SYSTEM, "failed shared mem init in distribPhotonContrib"); |
247 |
|
|
248 |
|
if (photonCnt == MAP_FAILED) |
249 |
|
error(SYSTEM, "failed shared mem mapping in distribPhotonContrib"); |
250 |
+ |
#else |
251 |
+ |
/* Allocate photon counters statically on Windoze */ |
252 |
+ |
if (!(photonCnt = malloc(photonCntSize))) |
253 |
+ |
error(SYSTEM, "failed trivial malloc in distribPhotonContrib"); |
254 |
+ |
|
255 |
+ |
for (srcIdx = 0; srcIdx < PHOTONCNT_NUMEMIT(nsources); srcIdx++) |
256 |
+ |
photonCnt [srcIdx] = 0; |
257 |
+ |
#endif /* NIX */ |
258 |
|
|
259 |
+ |
if (verbose) { |
260 |
+ |
sprintf(errmsg, "\nIntegrating flux from %d sources", nsources); |
261 |
+ |
|
262 |
+ |
if (photonPorts) { |
263 |
+ |
sprintf(errmsg2, " via %d ports", numPhotonPorts); |
264 |
+ |
strcat(errmsg, errmsg2); |
265 |
+ |
} |
266 |
+ |
|
267 |
+ |
strcat(errmsg, "\n"); |
268 |
+ |
eputs(errmsg); |
269 |
+ |
} |
270 |
+ |
|
271 |
|
/* ============================================================= |
272 |
< |
* FLUX INTEGRATION - Get total flux emitted from light source |
272 |
> |
* FLUX INTEGRATION - Get total flux emitted from sources/ports |
273 |
|
* ============================================================= */ |
274 |
|
for (srcIdx = 0; srcIdx < nsources; srcIdx++) { |
275 |
< |
unsigned portCnt = 0; |
251 |
< |
|
275 |
> |
unsigned portCnt = 0; |
276 |
|
srcFlux [srcIdx] = 0; |
277 |
|
emap.src = source + srcIdx; |
278 |
|
|
255 |
– |
if (photonRepTime) |
256 |
– |
eputs("\n"); |
257 |
– |
|
279 |
|
do { /* Need at least one iteration if no ports! */ |
280 |
|
emap.port = emap.src -> sflags & SDISTANT ? photonPorts + portCnt |
281 |
|
: NULL; |
282 |
|
photonPartition [emap.src -> so -> otype] (&emap); |
283 |
< |
|
284 |
< |
if (photonRepTime) { |
285 |
< |
sprintf(errmsg, "Integrating flux from source %s (mod %s) ", |
286 |
< |
source [srcIdx].so -> oname, |
287 |
< |
objptr(source [srcIdx].so -> omod) -> oname); |
267 |
< |
|
283 |
> |
|
284 |
> |
if (verbose) { |
285 |
> |
sprintf(errmsg, "\tIntegrating flux from source %s ", |
286 |
> |
source [srcIdx].so -> oname); |
287 |
> |
|
288 |
|
if (emap.port) { |
289 |
|
sprintf(errmsg2, "via port %s ", |
290 |
|
photonPorts [portCnt].so -> oname); |
291 |
|
strcat(errmsg, errmsg2); |
292 |
|
} |
293 |
< |
|
294 |
< |
sprintf(errmsg2, "(%lu partitions)...\n", emap.numPartitions); |
293 |
> |
|
294 |
> |
sprintf(errmsg2, "(%lu partitions)\n", emap.numPartitions); |
295 |
|
strcat(errmsg, errmsg2); |
296 |
|
eputs(errmsg); |
297 |
+ |
#if NIX |
298 |
|
fflush(stderr); |
299 |
< |
} |
299 |
> |
#endif |
300 |
> |
} |
301 |
|
|
302 |
|
for (emap.partitionCnt = 0; emap.partitionCnt < emap.numPartitions; |
303 |
|
emap.partitionCnt++) { |
314 |
|
error(WARNING, errmsg); |
315 |
|
} |
316 |
|
} |
317 |
< |
|
318 |
< |
if (photonRepTime) |
319 |
< |
eputs("\n"); |
320 |
< |
|
321 |
< |
/* Init per-subprocess primary heap files */ |
322 |
< |
for (proc = 0; proc < numProc; proc++) |
323 |
< |
if (!(primaryHeap [proc] = tmpfile())) |
317 |
> |
|
318 |
> |
/* Allocate & init per-subprocess primary heap files */ |
319 |
> |
primaryHeap = calloc(numProc, sizeof(FILE*)); |
320 |
> |
primaryHeapFname = calloc(numProc, sizeof(char*)); |
321 |
> |
primaryOfs = calloc(numProc, sizeof(PhotonPrimaryIdx)); |
322 |
> |
if (!primaryHeap || !primaryHeapFname || !primaryOfs) |
323 |
> |
error(SYSTEM, "failed primary heap allocation in " |
324 |
> |
"distribPhotonContrib"); |
325 |
> |
|
326 |
> |
for (proc = 0; proc < numProc; proc++) { |
327 |
> |
primaryHeapFname [proc] = malloc(PMAP_TMPFNLEN); |
328 |
> |
if (!primaryHeapFname [proc]) |
329 |
> |
error(SYSTEM, "failed primary heap file allocation in " |
330 |
> |
"distribPhotonContrib"); |
331 |
> |
|
332 |
> |
mktemp(strcpy(primaryHeapFname [proc], PMAP_TMPFNAME)); |
333 |
> |
if (!(primaryHeap [proc] = fopen(primaryHeapFname [proc], "w+b"))) |
334 |
|
error(SYSTEM, "failed opening primary heap file in " |
335 |
|
"distribPhotonContrib"); |
336 |
+ |
} |
337 |
+ |
|
338 |
+ |
/* Record start time for progress reports */ |
339 |
+ |
repStartTime = time(NULL); |
340 |
+ |
|
341 |
+ |
if (verbose) { |
342 |
+ |
sprintf(errmsg, "\nPhoton distribution @ %d procs\n", numProc); |
343 |
+ |
eputs(errmsg); |
344 |
+ |
} |
345 |
|
|
346 |
|
/* MAIN LOOP */ |
347 |
|
for (proc = 0; proc < numProc; proc++) { |
348 |
+ |
#if NIX |
349 |
|
if (!(pid = fork())) { |
350 |
< |
/* SUBPROCESS ENTERS HERE; |
351 |
< |
* all opened and memory mapped files are inherited */ |
352 |
< |
|
350 |
> |
/* SUBPROCESS ENTERS HERE; opened and mmapped files inherited */ |
351 |
> |
#else |
352 |
> |
if (1) { |
353 |
> |
/* No subprocess under Windoze */ |
354 |
> |
#endif |
355 |
|
/* Local photon counters for this subprocess */ |
356 |
|
unsigned long lastNumPhotons = 0, localNumEmitted = 0; |
357 |
< |
double photonFluxSum = 0; /* Running photon flux sum */ |
357 |
> |
double photonFluxSum = 0; /* Accum. photon flux */ |
358 |
|
|
359 |
|
/* Seed RNGs from PID for decorellated photon distribution */ |
360 |
|
pmapSeed(randSeed + proc, partState); |
361 |
< |
pmapSeed(randSeed + proc, emitState); |
362 |
< |
pmapSeed(randSeed + proc, cntState); |
363 |
< |
pmapSeed(randSeed + proc, mediumState); |
364 |
< |
pmapSeed(randSeed + proc, scatterState); |
365 |
< |
pmapSeed(randSeed + proc, rouletteState); |
361 |
> |
pmapSeed(randSeed + (proc + 1) % numProc, emitState); |
362 |
> |
pmapSeed(randSeed + (proc + 2) % numProc, cntState); |
363 |
> |
pmapSeed(randSeed + (proc + 3) % numProc, mediumState); |
364 |
> |
pmapSeed(randSeed + (proc + 4) % numProc, scatterState); |
365 |
> |
pmapSeed(randSeed + (proc + 5) % numProc, rouletteState); |
366 |
> |
|
367 |
> |
#ifdef PMAP_SIGUSR |
368 |
> |
double partNumEmit; |
369 |
> |
unsigned long partEmitCnt; |
370 |
> |
double srcPhotonFlux, avgPhotonFlux; |
371 |
> |
unsigned portCnt, passCnt, prePassCnt; |
372 |
> |
float srcPreDistrib; |
373 |
> |
double srcNumEmit; /* # to emit from source */ |
374 |
> |
unsigned long srcNumDistrib; /* # stored */ |
375 |
> |
|
376 |
> |
void sigUsrDiags() |
377 |
> |
/* Loop diags via SIGUSR1 */ |
378 |
> |
{ |
379 |
> |
sprintf(errmsg, |
380 |
> |
"********************* Proc %d Diags *********************\n" |
381 |
> |
"srcIdx = %d (%s)\nportCnt = %d (%s)\npassCnt = %d\n" |
382 |
> |
"srcFlux = %f\nsrcPhotonFlux = %f\navgPhotonFlux = %f\n" |
383 |
> |
"partNumEmit = %f\npartEmitCnt = %lu\n\n", |
384 |
> |
proc, srcIdx, findmaterial(source [srcIdx].so) -> oname, |
385 |
> |
portCnt, photonPorts [portCnt].so -> oname, |
386 |
> |
passCnt, srcFlux [srcIdx], srcPhotonFlux, avgPhotonFlux, |
387 |
> |
partNumEmit, partEmitCnt); |
388 |
> |
eputs(errmsg); |
389 |
> |
fflush(stderr); |
390 |
> |
} |
391 |
> |
#endif |
392 |
|
|
393 |
+ |
#ifdef PMAP_SIGUSR |
394 |
+ |
signal(SIGUSR1, sigUsrDiags); |
395 |
+ |
#endif |
396 |
+ |
|
397 |
+ |
#ifdef DEBUG_PMAP |
398 |
+ |
/* Output child process PID after random delay to prevent corrupted |
399 |
+ |
* console output due to race condition */ |
400 |
+ |
usleep(1e6 * pmapRandom(rouletteState)); |
401 |
+ |
fprintf(stderr, "Proc %d: PID = %d " |
402 |
+ |
"(waiting 10 sec to attach debugger...)\n", |
403 |
+ |
proc, getpid()); |
404 |
+ |
/* Allow time for debugger to attach to child process */ |
405 |
+ |
sleep(10); |
406 |
+ |
#endif |
407 |
+ |
|
408 |
|
/* ============================================================= |
409 |
|
* 2-PASS PHOTON DISTRIBUTION |
410 |
|
* Pass 1 (pre): emit fraction of target photon count |
411 |
|
* Pass 2 (main): based on outcome of pass 1, estimate remaining |
412 |
|
* number of photons to emit to approximate target |
413 |
|
* count |
414 |
< |
* ============================================================= */ |
414 |
> |
* ============================================================= */ |
415 |
|
for (srcIdx = 0; srcIdx < nsources; srcIdx++) { |
416 |
+ |
#ifndef PMAP_SIGUSR |
417 |
|
unsigned portCnt, passCnt = 0, prePassCnt = 0; |
418 |
|
float srcPreDistrib = preDistrib; |
419 |
|
double srcNumEmit = 0; /* # to emit from source */ |
420 |
|
unsigned long srcNumDistrib = pm -> numPhotons; /* # stored */ |
421 |
+ |
#else |
422 |
+ |
passCnt = prePassCnt = 0; |
423 |
+ |
srcPreDistrib = preDistrib; |
424 |
+ |
srcNumEmit = 0; /* # to emit from source */ |
425 |
+ |
srcNumDistrib = pm -> numPhotons; /* # stored */ |
426 |
+ |
#endif |
427 |
|
|
428 |
|
if (srcFlux [srcIdx] < FTINY) |
429 |
|
continue; |
433 |
|
/* INIT PASS 1 */ |
434 |
|
if (++prePassCnt > maxPreDistrib) { |
435 |
|
/* Warn if no photons contributed after sufficient |
436 |
< |
* iterations */ |
437 |
< |
sprintf(errmsg, "proc %d, source %s: " |
438 |
< |
"too many prepasses, skipped", |
439 |
< |
proc, source [srcIdx].so -> oname); |
440 |
< |
error(WARNING, errmsg); |
436 |
> |
* iterations; only output from subprocess 0 to reduce |
437 |
> |
* console clutter */ |
438 |
> |
if (!proc) { |
439 |
> |
sprintf(errmsg, |
440 |
> |
"source %s: too many prepasses, skipped", |
441 |
> |
source [srcIdx].so -> oname); |
442 |
> |
error(WARNING, errmsg); |
443 |
> |
} |
444 |
> |
|
445 |
|
break; |
446 |
|
} |
447 |
|
|
450 |
|
} |
451 |
|
else { |
452 |
|
/* INIT PASS 2 */ |
453 |
+ |
#ifndef PMAP_SIGUSR |
454 |
|
double srcPhotonFlux, avgPhotonFlux; |
455 |
+ |
#endif |
456 |
|
|
457 |
|
/* Based on the outcome of the predistribution we can now |
458 |
|
* figure out how many more photons we have to emit from |
474 |
|
srcPhotonFlux = srcFlux [srcIdx] / srcNumEmit; |
475 |
|
avgPhotonFlux = photonFluxSum / (srcIdx + 1); |
476 |
|
|
477 |
< |
if (avgPhotonFlux > 0 && |
477 |
> |
if (avgPhotonFlux > FTINY && |
478 |
|
srcPhotonFlux / avgPhotonFlux < FTINY) { |
479 |
|
/* Skip source if its photon flux is grossly below the |
480 |
< |
* running average, indicating negligible contribs at |
481 |
< |
* the expense of excessive distribution time */ |
482 |
< |
sprintf(errmsg, "proc %d, source %s: " |
483 |
< |
"itsy bitsy photon flux, skipped", |
484 |
< |
proc, source [srcIdx].so -> oname); |
485 |
< |
error(WARNING, errmsg); |
486 |
< |
srcNumEmit = 0; |
480 |
> |
* running average, indicating negligible contributions |
481 |
> |
* at the expense of excessive distribution time; only |
482 |
> |
* output from subproc 0 to reduce console clutter */ |
483 |
> |
if (!proc) { |
484 |
> |
sprintf(errmsg, |
485 |
> |
"source %s: itsy bitsy photon flux, skipped", |
486 |
> |
source [srcIdx].so -> oname); |
487 |
> |
error(WARNING, errmsg); |
488 |
> |
} |
489 |
> |
|
490 |
> |
srcNumEmit = 0; /* Or just break??? */ |
491 |
|
} |
492 |
|
|
493 |
|
/* Update sum of photon flux per light source */ |
494 |
|
photonFluxSum += srcPhotonFlux; |
495 |
|
} |
496 |
< |
|
496 |
> |
|
497 |
|
portCnt = 0; |
498 |
|
do { /* Need at least one iteration if no ports! */ |
499 |
|
emap.src = source + srcIdx; |
500 |
|
emap.port = emap.src -> sflags & SDISTANT |
501 |
|
? photonPorts + portCnt : NULL; |
502 |
|
photonPartition [emap.src -> so -> otype] (&emap); |
503 |
< |
|
504 |
< |
if (photonRepTime && !proc) { |
503 |
> |
|
504 |
> |
if (verbose && !proc) { |
505 |
> |
/* Output from subproc 0 only to avoid race condition |
506 |
> |
* on console I/O */ |
507 |
|
if (!passCnt) |
508 |
< |
sprintf(errmsg, "PREPASS %d on source %s (mod %s) ", |
509 |
< |
prePassCnt, source [srcIdx].so -> oname, |
406 |
< |
objptr(source[srcIdx].so->omod) -> oname); |
508 |
> |
sprintf(errmsg, "\tPREPASS %d on source %s ", |
509 |
> |
prePassCnt, source [srcIdx].so -> oname); |
510 |
|
else |
511 |
< |
sprintf(errmsg, "MAIN PASS on source %s (mod %s) ", |
512 |
< |
source [srcIdx].so -> oname, |
513 |
< |
objptr(source[srcIdx].so->omod) -> oname); |
411 |
< |
|
511 |
> |
sprintf(errmsg, "\tMAIN PASS on source %s ", |
512 |
> |
source [srcIdx].so -> oname); |
513 |
> |
|
514 |
|
if (emap.port) { |
515 |
|
sprintf(errmsg2, "via port %s ", |
516 |
|
photonPorts [portCnt].so -> oname); |
517 |
|
strcat(errmsg, errmsg2); |
518 |
|
} |
519 |
< |
|
519 |
> |
|
520 |
|
sprintf(errmsg2, "(%lu partitions)\n", |
521 |
|
emap.numPartitions); |
522 |
< |
strcat(errmsg, errmsg2); |
522 |
> |
strcat(errmsg, errmsg2); |
523 |
|
eputs(errmsg); |
524 |
+ |
#if NIX |
525 |
|
fflush(stderr); |
526 |
< |
} |
526 |
> |
#endif |
527 |
> |
} |
528 |
|
|
529 |
|
for (emap.partitionCnt = 0; emap.partitionCnt < emap.numPartitions; |
530 |
|
emap.partitionCnt++) { |
531 |
+ |
#ifndef PMAP_SIGUSR |
532 |
|
double partNumEmit; |
533 |
|
unsigned long partEmitCnt; |
534 |
+ |
#endif |
535 |
|
|
536 |
|
/* Get photon origin within current source partishunn |
537 |
|
* and build emission map */ |
550 |
|
partEmitCnt++; |
551 |
|
|
552 |
|
/* Update local and shared global emission counter */ |
447 |
– |
localNumEmitted += partEmitCnt; |
553 |
|
photonCnt [PHOTONCNT_NUMEMIT(srcIdx)] += partEmitCnt; |
554 |
+ |
localNumEmitted += partEmitCnt; |
555 |
|
|
556 |
< |
/* Integer counter avoids FP rounding errors */ |
556 |
> |
/* Integer counter avoids FP rounding errors during |
557 |
> |
* iteration */ |
558 |
|
while (partEmitCnt--) { |
559 |
|
RAY photonRay; |
560 |
|
|
563 |
|
* until absorbed/leaked; emitPhoton() sets the |
564 |
|
* emitting light source index in photonRay */ |
565 |
|
emitPhoton(&emap, &photonRay); |
566 |
+ |
#if 1 |
567 |
+ |
if (emap.port) |
568 |
+ |
/* !!! PHOTON PORT REJECTION SAMPLING HACK: set |
569 |
+ |
* !!! photon port as fake hit object for |
570 |
+ |
* !!! primary ray to check for intersection in |
571 |
+ |
* !!! tracePhoton() */ |
572 |
+ |
photonRay.ro = emap.port -> so; |
573 |
+ |
#endif |
574 |
|
newPhotonPrimary(pm, &photonRay, primaryHeap[proc]); |
575 |
|
/* Set subprocess index in photonRay for post- |
576 |
|
* distrib primary index linearisation; this is |
584 |
|
photonCnt [PHOTONCNT_NUMPHOT] += pm -> numPhotons - |
585 |
|
lastNumPhotons; |
586 |
|
lastNumPhotons = pm -> numPhotons; |
587 |
+ |
#if !NIX |
588 |
+ |
/* Synchronous progress report on Windoze */ |
589 |
+ |
if (!proc && photonRepTime > 0 && |
590 |
+ |
time(NULL) >= repLastTime + photonRepTime) { |
591 |
+ |
unsigned s; |
592 |
+ |
repComplete = pm -> distribTarget * numProc; |
593 |
+ |
repProgress = photonCnt [PHOTONCNT_NUMPHOT]; |
594 |
+ |
|
595 |
+ |
for (repEmitted = 0, s = 0; s < nsources; s++) |
596 |
+ |
repEmitted += photonCnt [PHOTONCNT_NUMEMIT(s)]; |
597 |
+ |
|
598 |
+ |
pmapDistribReport(); |
599 |
+ |
} |
600 |
+ |
#endif |
601 |
|
} |
602 |
|
|
603 |
|
portCnt++; |
604 |
|
} while (portCnt < numPhotonPorts); |
605 |
|
|
606 |
< |
if (pm -> numPhotons == srcNumDistrib) |
606 |
> |
if (pm -> numPhotons == srcNumDistrib) { |
607 |
|
/* Double predistrib factor in case no photons were stored |
608 |
|
* for this source and redo pass 1 */ |
609 |
|
srcPreDistrib *= 2; |
610 |
+ |
} |
611 |
|
else { |
612 |
|
/* Now do pass 2 */ |
613 |
|
passCnt++; |
484 |
– |
/* if (photonRepTime) |
485 |
– |
eputs("\n"); */ |
614 |
|
} |
615 |
|
} |
616 |
|
} |
617 |
|
|
618 |
|
/* Flush heap buffa one final time to prevent data corruption */ |
619 |
< |
flushPhotonHeap(pm); |
492 |
< |
fclose(pm -> heap); |
493 |
< |
|
619 |
> |
flushPhotonHeap(pm); |
620 |
|
/* Flush final photon primary to primary heap file */ |
621 |
|
newPhotonPrimary(pm, NULL, primaryHeap [proc]); |
622 |
< |
fclose(primaryHeap [proc]); |
622 |
> |
/* Heap files closed automatically on exit |
623 |
> |
fclose(pm -> heap); |
624 |
> |
fclose(primaryHeap [proc]); */ |
625 |
|
|
626 |
|
#ifdef DEBUG_PMAP |
627 |
< |
sprintf(errmsg, "Proc %d exited with total %ld photons\n", proc, |
627 |
> |
sprintf(errmsg, "Proc %d total %ld photons\n", proc, |
628 |
|
pm -> numPhotons); |
629 |
|
eputs(errmsg); |
630 |
+ |
fflush(stderr); |
631 |
|
#endif |
632 |
|
|
633 |
+ |
#ifdef PMAP_SIGUSR |
634 |
+ |
signal(SIGUSR1, SIG_DFL); |
635 |
+ |
#endif |
636 |
+ |
|
637 |
+ |
#if NIX |
638 |
+ |
/* Terminate subprocess */ |
639 |
|
exit(0); |
640 |
+ |
#endif |
641 |
|
} |
642 |
|
else if (pid < 0) |
643 |
|
error(SYSTEM, "failed to fork subprocess in distribPhotonContrib"); |
644 |
|
} |
645 |
|
|
646 |
+ |
#if NIX |
647 |
|
/* PARENT PROCESS CONTINUES HERE */ |
511 |
– |
/* Record start time and enable progress report signal handler */ |
512 |
– |
repStartTime = time(NULL); |
648 |
|
#ifdef SIGCONT |
649 |
+ |
/* Enable progress report signal handler */ |
650 |
|
signal(SIGCONT, pmapDistribReport); |
651 |
|
#endif |
516 |
– |
/* |
517 |
– |
if (photonRepTime) |
518 |
– |
eputs("\n"); */ |
519 |
– |
|
652 |
|
/* Wait for subprocesses to complete while reporting progress */ |
653 |
|
proc = numProc; |
654 |
|
while (proc) { |
662 |
|
|
663 |
|
/* Nod off for a bit and update progress */ |
664 |
|
sleep(1); |
665 |
< |
|
666 |
< |
/* Update progress report from shared subprocess counters */ |
665 |
> |
|
666 |
> |
/* Asynchronous progress report from shared subprocess counters */ |
667 |
|
repComplete = pm -> distribTarget * numProc; |
668 |
< |
repProgress = photonCnt [PHOTONCNT_NUMPHOT]; |
668 |
> |
repProgress = photonCnt [PHOTONCNT_NUMPHOT]; |
669 |
> |
|
670 |
|
for (repEmitted = 0, srcIdx = 0; srcIdx < nsources; srcIdx++) |
671 |
|
repEmitted += photonCnt [PHOTONCNT_NUMEMIT(srcIdx)]; |
672 |
|
|
679 |
|
else signal(SIGCONT, pmapDistribReport); |
680 |
|
#endif |
681 |
|
} |
682 |
+ |
#endif /* NIX */ |
683 |
|
|
684 |
|
/* ================================================================ |
685 |
|
* POST-DISTRIBUTION - Set photon flux and build kd-tree, etc. |
686 |
|
* ================================================================ */ |
687 |
|
#ifdef SIGCONT |
688 |
+ |
/* Reset signal handler */ |
689 |
|
signal(SIGCONT, SIG_DFL); |
690 |
|
#endif |
691 |
|
free(emap.samples); |
692 |
|
|
693 |
|
if (!pm -> numPhotons) |
694 |
< |
error(USER, "empty photon map"); |
694 |
> |
error(USER, "empty contribution photon map"); |
695 |
|
|
696 |
|
/* Load per-subprocess primary rays into pm -> primary array */ |
697 |
< |
pm -> numPrimary = buildPrimaries(pm, primaryHeap, primaryOfs, numProc); |
697 |
> |
/* Dumb compilers apparently need the char** cast */ |
698 |
> |
pm -> numPrimary = buildPrimaries(pm, primaryHeap, |
699 |
> |
(char**)primaryHeapFname, |
700 |
> |
primaryOfs, numProc); |
701 |
|
if (!pm -> numPrimary) |
702 |
|
error(INTERNAL, "no primary rays in contribution photon map"); |
703 |
|
|
704 |
|
/* Set photon flux per source */ |
705 |
|
for (srcIdx = 0; srcIdx < nsources; srcIdx++) |
706 |
|
srcFlux [srcIdx] /= photonCnt [PHOTONCNT_NUMEMIT(srcIdx)]; |
707 |
< |
|
707 |
> |
#if NIX |
708 |
|
/* Photon counters no longer needed, unmap shared memory */ |
709 |
|
munmap(photonCnt, sizeof(*photonCnt)); |
710 |
|
close(shmFile); |
573 |
– |
#if 0 |
574 |
– |
shm_unlink(shmFname); |
575 |
– |
#else |
711 |
|
unlink(shmFname); |
712 |
+ |
#else |
713 |
+ |
free(photonCnt); |
714 |
|
#endif |
715 |
|
|
716 |
< |
if (photonRepTime) { |
717 |
< |
eputs("\nBuilding contrib photon map...\n"); |
716 |
> |
if (verbose) { |
717 |
> |
eputs("\nBuilding contribution photon map...\n"); |
718 |
> |
#if NIX |
719 |
|
fflush(stderr); |
720 |
+ |
#endif |
721 |
|
} |
722 |
|
|
723 |
|
/* Build underlying data structure; heap is destroyed */ |
724 |
< |
buildPhotonMap(pm, srcFlux, primaryOfs, numProc); |
724 |
> |
buildPhotonMap(pm, srcFlux, primaryOfs, numProc); |
725 |
> |
|
726 |
> |
/* Free per-subprocess primary heap files */ |
727 |
> |
for (proc = 0; proc < numProc; proc++) |
728 |
> |
free(primaryHeapFname [proc]); |
729 |
> |
|
730 |
> |
free(primaryHeapFname); |
731 |
> |
free(primaryHeap); |
732 |
> |
free(primaryOfs); |
733 |
> |
|
734 |
> |
if (verbose) |
735 |
> |
eputs("\n"); |
736 |
|
} |