| 4 |
|
|
| 5 |
|
/* |
| 6 |
|
====================================================================== |
| 7 |
< |
Photon map support for building light source contributions |
| 7 |
> |
Photon map for light source contributions |
| 8 |
|
|
| 9 |
|
Roland Schregle (roland.schregle@{hslu.ch, gmail.com}) |
| 10 |
|
(c) Lucerne University of Applied Sciences and Arts, |
| 23 |
|
#include "pmapdiag.h" |
| 24 |
|
#include "rcontrib.h" |
| 25 |
|
#include "otypes.h" |
| 26 |
< |
#include <sys/mman.h> |
| 27 |
< |
#include <sys/wait.h> |
| 26 |
> |
#if NIX |
| 27 |
> |
#include <sys/mman.h> |
| 28 |
> |
#include <sys/wait.h> |
| 29 |
> |
#endif |
| 30 |
|
|
| 31 |
|
|
| 30 |
– |
|
| 32 |
|
static PhotonPrimaryIdx newPhotonPrimary (PhotonMap *pmap, |
| 33 |
|
const RAY *primRay, |
| 34 |
|
FILE *primHeap) |
| 43 |
|
return 0; |
| 44 |
|
|
| 45 |
|
/* Check if last primary ray has spawned photons (srcIdx >= 0, see |
| 46 |
< |
* newPhoton()), in which case we write it to the primary heap file |
| 47 |
< |
* before overwriting it */ |
| 46 |
> |
* newPhoton()), in which case we save it to the primary heap file |
| 47 |
> |
* before clobbering it */ |
| 48 |
|
if (pmap -> lastPrimary.srcIdx >= 0) { |
| 49 |
|
if (!fwrite(&pmap -> lastPrimary, sizeof(PhotonPrimary), 1, primHeap)) |
| 50 |
|
error(SYSTEM, "failed writing photon primary in newPhotonPrimary"); |
| 60 |
|
|
| 61 |
|
if (primRay) { |
| 62 |
|
FVECT dvec; |
| 63 |
< |
|
| 63 |
> |
|
| 64 |
> |
#ifdef PMAP_PRIMARYDIR |
| 65 |
|
/* Reverse incident direction to point to light source */ |
| 66 |
|
dvec [0] = -primRay -> rdir [0]; |
| 67 |
|
dvec [1] = -primRay -> rdir [1]; |
| 68 |
|
dvec [2] = -primRay -> rdir [2]; |
| 69 |
|
pmap -> lastPrimary.dir = encodedir(dvec); |
| 70 |
+ |
#endif |
| 71 |
|
#ifdef PMAP_PRIMARYPOS |
| 72 |
|
VCOPY(pmap -> lastPrimary.pos, primRay -> rop); |
| 73 |
|
#endif |
| 78 |
|
|
| 79 |
|
|
| 80 |
|
|
| 81 |
< |
#ifdef DEBUG_PMAP_CONTRIB |
| 81 |
> |
#ifdef DEBUG_PMAP |
| 82 |
|
static int checkPrimaryHeap (FILE *file) |
| 83 |
|
/* Check heap for ordered primaries */ |
| 84 |
|
{ |
| 118 |
|
|
| 119 |
|
|
| 120 |
|
static PhotonPrimaryIdx buildPrimaries (PhotonMap *pmap, FILE **primaryHeap, |
| 121 |
+ |
char **primaryHeapFname, |
| 122 |
|
PhotonPrimaryIdx *primaryOfs, |
| 123 |
|
unsigned numHeaps) |
| 124 |
|
/* Consolidate per-subprocess photon primary heaps into the primary array |
| 136 |
|
for (heap = 0; heap < numHeaps; heap++) { |
| 137 |
|
primaryOfs [heap] = pmap -> numPrimary; |
| 138 |
|
|
| 139 |
< |
if (fseek(primaryHeap [heap], 0, SEEK_END)) |
| 139 |
> |
if (fseek(primaryHeap [heap], 0, SEEK_END) < 0) |
| 140 |
|
error(SYSTEM, "failed photon primary seek in buildPrimaries"); |
| 141 |
|
pmap -> numPrimary += heapLen = ftell(primaryHeap [heap]) / |
| 142 |
|
sizeof(PhotonPrimary); |
| 152 |
|
heapLen, primaryHeap [heap]) != heapLen) |
| 153 |
|
error(SYSTEM, "failed reading photon primaries in buildPrimaries"); |
| 154 |
|
|
| 155 |
< |
fclose(primaryHeap [heap]); |
| 155 |
> |
fclose(primaryHeap [heap]); |
| 156 |
> |
unlink(primaryHeapFname [heap]); |
| 157 |
|
} |
| 158 |
|
|
| 159 |
|
return pmap -> numPrimary; |
| 172 |
|
|
| 173 |
|
|
| 174 |
|
|
| 175 |
+ |
|
| 176 |
+ |
|
| 177 |
+ |
|
| 178 |
|
void distribPhotonContrib (PhotonMap* pm, unsigned numProc) |
| 179 |
|
{ |
| 180 |
|
EmissionMap emap; |
| 181 |
< |
char errmsg2 [128], shmFname [255]; |
| 181 |
> |
char errmsg2 [128], shmFname [PMAP_TMPFNLEN]; |
| 182 |
|
unsigned srcIdx, proc; |
| 183 |
|
int shmFile, stat, pid; |
| 184 |
|
double *srcFlux, /* Emitted flux per light source */ |
| 185 |
|
srcDistribTarget; /* Target photon count per source */ |
| 186 |
|
PhotonContribCnt *photonCnt; /* Photon emission counter array */ |
| 187 |
< |
const unsigned photonCntSize = sizeof(PhotonContribCnt) * |
| 187 |
> |
unsigned photonCntSize = sizeof(PhotonContribCnt) * |
| 188 |
|
PHOTONCNT_NUMEMIT(nsources); |
| 189 |
< |
FILE *primaryHeap [numProc]; |
| 190 |
< |
PhotonPrimaryIdx primaryOfs [numProc]; |
| 189 |
> |
FILE **primaryHeap = NULL; |
| 190 |
> |
char **primaryHeapFname = NULL; |
| 191 |
> |
PhotonPrimaryIdx *primaryOfs = NULL; |
| 192 |
|
|
| 193 |
|
if (!pm) |
| 194 |
|
error(USER, "no photon map defined in distribPhotonContrib"); |
| 225 |
|
|
| 226 |
|
/* Per-subprocess / per-source target counts */ |
| 227 |
|
pm -> distribTarget /= numProc; |
| 228 |
< |
srcDistribTarget = nsources ? (double)pm -> distribTarget / nsources : 0; |
| 228 |
> |
srcDistribTarget = nsources ? (double)pm -> distribTarget / nsources : 0; |
| 229 |
|
|
| 230 |
< |
/* Get photon ports if specified */ |
| 231 |
< |
if (ambincl == 1) |
| 232 |
< |
getPhotonPorts(); |
| 230 |
> |
if (!pm -> distribTarget) |
| 231 |
> |
error(INTERNAL, "no photons to distribute in distribPhotonContrib"); |
| 232 |
> |
|
| 233 |
> |
/* Get photon ports from modifier list */ |
| 234 |
> |
getPhotonPorts(photonPortList); |
| 235 |
|
|
| 236 |
|
/* Get photon sensor modifiers */ |
| 237 |
|
getPhotonSensors(photonSensorList); |
| 238 |
< |
|
| 238 |
> |
|
| 239 |
> |
#if NIX |
| 240 |
|
/* Set up shared mem for photon counters (zeroed by ftruncate) */ |
| 241 |
< |
#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); |
| 241 |
> |
strcpy(shmFname, PMAP_TMPFNAME); |
| 242 |
|
shmFile = mkstemp(shmFname); |
| 235 |
– |
#endif |
| 243 |
|
|
| 244 |
|
if (shmFile < 0 || ftruncate(shmFile, photonCntSize) < 0) |
| 245 |
|
error(SYSTEM, "failed shared mem init in distribPhotonContrib"); |
| 249 |
|
|
| 250 |
|
if (photonCnt == MAP_FAILED) |
| 251 |
|
error(SYSTEM, "failed shared mem mapping in distribPhotonContrib"); |
| 252 |
+ |
#else |
| 253 |
+ |
/* Allocate photon counters statically on Windoze */ |
| 254 |
+ |
if (!(photonCnt = malloc(photonCntSize))) |
| 255 |
+ |
error(SYSTEM, "failed trivial malloc in distribPhotonContrib"); |
| 256 |
+ |
|
| 257 |
+ |
for (srcIdx = 0; srcIdx < PHOTONCNT_NUMEMIT(nsources); srcIdx++) |
| 258 |
+ |
photonCnt [srcIdx] = 0; |
| 259 |
+ |
#endif /* NIX */ |
| 260 |
|
|
| 261 |
+ |
if (verbose) { |
| 262 |
+ |
sprintf(errmsg, "\nIntegrating flux from %d sources", nsources); |
| 263 |
+ |
|
| 264 |
+ |
if (photonPorts) { |
| 265 |
+ |
sprintf(errmsg2, " via %d ports", numPhotonPorts); |
| 266 |
+ |
strcat(errmsg, errmsg2); |
| 267 |
+ |
} |
| 268 |
+ |
|
| 269 |
+ |
strcat(errmsg, "\n"); |
| 270 |
+ |
eputs(errmsg); |
| 271 |
+ |
} |
| 272 |
+ |
|
| 273 |
|
/* ============================================================= |
| 274 |
< |
* FLUX INTEGRATION - Get total flux emitted from light source |
| 274 |
> |
* FLUX INTEGRATION - Get total flux emitted from sources/ports |
| 275 |
|
* ============================================================= */ |
| 276 |
|
for (srcIdx = 0; srcIdx < nsources; srcIdx++) { |
| 277 |
< |
unsigned portCnt = 0; |
| 251 |
< |
|
| 277 |
> |
unsigned portCnt = 0; |
| 278 |
|
srcFlux [srcIdx] = 0; |
| 279 |
|
emap.src = source + srcIdx; |
| 280 |
|
|
| 255 |
– |
if (photonRepTime) |
| 256 |
– |
eputs("\n"); |
| 257 |
– |
|
| 281 |
|
do { /* Need at least one iteration if no ports! */ |
| 282 |
|
emap.port = emap.src -> sflags & SDISTANT ? photonPorts + portCnt |
| 283 |
|
: NULL; |
| 284 |
|
photonPartition [emap.src -> so -> otype] (&emap); |
| 285 |
< |
|
| 286 |
< |
if (photonRepTime) { |
| 287 |
< |
sprintf(errmsg, "Integrating flux from source %s (mod %s) ", |
| 288 |
< |
source [srcIdx].so -> oname, |
| 289 |
< |
objptr(source [srcIdx].so -> omod) -> oname); |
| 267 |
< |
|
| 285 |
> |
|
| 286 |
> |
if (verbose) { |
| 287 |
> |
sprintf(errmsg, "\tIntegrating flux from source %s ", |
| 288 |
> |
source [srcIdx].so -> oname); |
| 289 |
> |
|
| 290 |
|
if (emap.port) { |
| 291 |
|
sprintf(errmsg2, "via port %s ", |
| 292 |
|
photonPorts [portCnt].so -> oname); |
| 293 |
|
strcat(errmsg, errmsg2); |
| 294 |
|
} |
| 295 |
< |
|
| 296 |
< |
sprintf(errmsg2, "(%lu partitions)...\n", emap.numPartitions); |
| 295 |
> |
|
| 296 |
> |
sprintf(errmsg2, "(%lu partitions)\n", emap.numPartitions); |
| 297 |
|
strcat(errmsg, errmsg2); |
| 298 |
|
eputs(errmsg); |
| 299 |
+ |
#if NIX |
| 300 |
|
fflush(stderr); |
| 301 |
< |
} |
| 301 |
> |
#endif |
| 302 |
> |
} |
| 303 |
|
|
| 304 |
|
for (emap.partitionCnt = 0; emap.partitionCnt < emap.numPartitions; |
| 305 |
|
emap.partitionCnt++) { |
| 316 |
|
error(WARNING, errmsg); |
| 317 |
|
} |
| 318 |
|
} |
| 319 |
< |
|
| 320 |
< |
if (photonRepTime) |
| 321 |
< |
eputs("\n"); |
| 322 |
< |
|
| 323 |
< |
/* Init per-subprocess primary heap files */ |
| 324 |
< |
for (proc = 0; proc < numProc; proc++) |
| 325 |
< |
if (!(primaryHeap [proc] = tmpfile())) |
| 319 |
> |
|
| 320 |
> |
/* Allocate & init per-subprocess primary heap files */ |
| 321 |
> |
primaryHeap = calloc(numProc, sizeof(FILE*)); |
| 322 |
> |
primaryHeapFname = calloc(numProc, sizeof(char*)); |
| 323 |
> |
primaryOfs = calloc(numProc, sizeof(PhotonPrimaryIdx)); |
| 324 |
> |
if (!primaryHeap || !primaryHeapFname || !primaryOfs) |
| 325 |
> |
error(SYSTEM, "failed primary heap allocation in " |
| 326 |
> |
"distribPhotonContrib"); |
| 327 |
> |
|
| 328 |
> |
for (proc = 0; proc < numProc; proc++) { |
| 329 |
> |
primaryHeapFname [proc] = malloc(PMAP_TMPFNLEN); |
| 330 |
> |
if (!primaryHeapFname [proc]) |
| 331 |
> |
error(SYSTEM, "failed primary heap file allocation in " |
| 332 |
> |
"distribPhotonContrib"); |
| 333 |
> |
|
| 334 |
> |
mktemp(strcpy(primaryHeapFname [proc], PMAP_TMPFNAME)); |
| 335 |
> |
if (!(primaryHeap [proc] = fopen(primaryHeapFname [proc], "w+b"))) |
| 336 |
|
error(SYSTEM, "failed opening primary heap file in " |
| 337 |
|
"distribPhotonContrib"); |
| 338 |
+ |
} |
| 339 |
+ |
|
| 340 |
+ |
/* Record start time for progress reports */ |
| 341 |
+ |
repStartTime = time(NULL); |
| 342 |
+ |
|
| 343 |
+ |
if (verbose) { |
| 344 |
+ |
sprintf(errmsg, "\nPhoton distribution @ %d procs\n", numProc); |
| 345 |
+ |
eputs(errmsg); |
| 346 |
+ |
} |
| 347 |
|
|
| 348 |
|
/* MAIN LOOP */ |
| 349 |
|
for (proc = 0; proc < numProc; proc++) { |
| 350 |
+ |
#if NIX |
| 351 |
|
if (!(pid = fork())) { |
| 352 |
< |
/* SUBPROCESS ENTERS HERE; |
| 353 |
< |
* all opened and memory mapped files are inherited */ |
| 354 |
< |
|
| 352 |
> |
/* SUBPROCESS ENTERS HERE; opened and mmapped files inherited */ |
| 353 |
> |
#else |
| 354 |
> |
if (1) { |
| 355 |
> |
/* No subprocess under Windoze */ |
| 356 |
> |
#endif |
| 357 |
|
/* Local photon counters for this subprocess */ |
| 358 |
|
unsigned long lastNumPhotons = 0, localNumEmitted = 0; |
| 359 |
< |
double photonFluxSum = 0; /* Running photon flux sum */ |
| 359 |
> |
double photonFluxSum = 0; /* Accum. photon flux */ |
| 360 |
|
|
| 361 |
|
/* Seed RNGs from PID for decorellated photon distribution */ |
| 362 |
|
pmapSeed(randSeed + proc, partState); |
| 363 |
< |
pmapSeed(randSeed + proc, emitState); |
| 364 |
< |
pmapSeed(randSeed + proc, cntState); |
| 365 |
< |
pmapSeed(randSeed + proc, mediumState); |
| 366 |
< |
pmapSeed(randSeed + proc, scatterState); |
| 367 |
< |
pmapSeed(randSeed + proc, rouletteState); |
| 363 |
> |
pmapSeed(randSeed + (proc + 1) % numProc, emitState); |
| 364 |
> |
pmapSeed(randSeed + (proc + 2) % numProc, cntState); |
| 365 |
> |
pmapSeed(randSeed + (proc + 3) % numProc, mediumState); |
| 366 |
> |
pmapSeed(randSeed + (proc + 4) % numProc, scatterState); |
| 367 |
> |
pmapSeed(randSeed + (proc + 5) % numProc, rouletteState); |
| 368 |
> |
|
| 369 |
> |
#ifdef PMAP_SIGUSR |
| 370 |
> |
double partNumEmit; |
| 371 |
> |
unsigned long partEmitCnt; |
| 372 |
> |
double srcPhotonFlux, avgPhotonFlux; |
| 373 |
> |
unsigned portCnt, passCnt, prePassCnt; |
| 374 |
> |
float srcPreDistrib; |
| 375 |
> |
double srcNumEmit; /* # to emit from source */ |
| 376 |
> |
unsigned long srcNumDistrib; /* # stored */ |
| 377 |
> |
|
| 378 |
> |
void sigUsrDiags() |
| 379 |
> |
/* Loop diags via SIGUSR1 */ |
| 380 |
> |
{ |
| 381 |
> |
sprintf(errmsg, |
| 382 |
> |
"********************* Proc %d Diags *********************\n" |
| 383 |
> |
"srcIdx = %d (%s)\nportCnt = %d (%s)\npassCnt = %d\n" |
| 384 |
> |
"srcFlux = %f\nsrcPhotonFlux = %f\navgPhotonFlux = %f\n" |
| 385 |
> |
"partNumEmit = %f\npartEmitCnt = %lu\n\n", |
| 386 |
> |
proc, srcIdx, findmaterial(source [srcIdx].so) -> oname, |
| 387 |
> |
portCnt, photonPorts [portCnt].so -> oname, |
| 388 |
> |
passCnt, srcFlux [srcIdx], srcPhotonFlux, avgPhotonFlux, |
| 389 |
> |
partNumEmit, partEmitCnt); |
| 390 |
> |
eputs(errmsg); |
| 391 |
> |
fflush(stderr); |
| 392 |
> |
} |
| 393 |
> |
#endif |
| 394 |
|
|
| 395 |
+ |
#ifdef PMAP_SIGUSR |
| 396 |
+ |
signal(SIGUSR1, sigUsrDiags); |
| 397 |
+ |
#endif |
| 398 |
+ |
|
| 399 |
+ |
#ifdef DEBUG_PMAP |
| 400 |
+ |
/* Output child process PID after random delay to prevent corrupted |
| 401 |
+ |
* console output due to race condition */ |
| 402 |
+ |
usleep(1e6 * pmapRandom(rouletteState)); |
| 403 |
+ |
fprintf(stderr, "Proc %d: PID = %d " |
| 404 |
+ |
"(waiting 10 sec to attach debugger...)\n", |
| 405 |
+ |
proc, getpid()); |
| 406 |
+ |
/* Allow time for debugger to attach to child process */ |
| 407 |
+ |
sleep(10); |
| 408 |
+ |
#endif |
| 409 |
+ |
|
| 410 |
|
/* ============================================================= |
| 411 |
|
* 2-PASS PHOTON DISTRIBUTION |
| 412 |
|
* Pass 1 (pre): emit fraction of target photon count |
| 413 |
|
* Pass 2 (main): based on outcome of pass 1, estimate remaining |
| 414 |
|
* number of photons to emit to approximate target |
| 415 |
|
* count |
| 416 |
< |
* ============================================================= */ |
| 416 |
> |
* ============================================================= */ |
| 417 |
|
for (srcIdx = 0; srcIdx < nsources; srcIdx++) { |
| 418 |
+ |
#ifndef PMAP_SIGUSR |
| 419 |
|
unsigned portCnt, passCnt = 0, prePassCnt = 0; |
| 420 |
|
float srcPreDistrib = preDistrib; |
| 421 |
|
double srcNumEmit = 0; /* # to emit from source */ |
| 422 |
|
unsigned long srcNumDistrib = pm -> numPhotons; /* # stored */ |
| 423 |
+ |
#else |
| 424 |
+ |
passCnt = prePassCnt = 0; |
| 425 |
+ |
srcPreDistrib = preDistrib; |
| 426 |
+ |
srcNumEmit = 0; /* # to emit from source */ |
| 427 |
+ |
srcNumDistrib = pm -> numPhotons; /* # stored */ |
| 428 |
+ |
#endif |
| 429 |
|
|
| 430 |
|
if (srcFlux [srcIdx] < FTINY) |
| 431 |
|
continue; |
| 435 |
|
/* INIT PASS 1 */ |
| 436 |
|
if (++prePassCnt > maxPreDistrib) { |
| 437 |
|
/* Warn if no photons contributed after sufficient |
| 438 |
< |
* iterations */ |
| 439 |
< |
sprintf(errmsg, "proc %d, source %s: " |
| 440 |
< |
"too many prepasses, skipped", |
| 441 |
< |
proc, source [srcIdx].so -> oname); |
| 442 |
< |
error(WARNING, errmsg); |
| 438 |
> |
* iterations; only output from subprocess 0 to reduce |
| 439 |
> |
* console clutter */ |
| 440 |
> |
if (!proc) { |
| 441 |
> |
sprintf(errmsg, |
| 442 |
> |
"source %s: too many prepasses, skipped", |
| 443 |
> |
source [srcIdx].so -> oname); |
| 444 |
> |
error(WARNING, errmsg); |
| 445 |
> |
} |
| 446 |
> |
|
| 447 |
|
break; |
| 448 |
|
} |
| 449 |
|
|
| 452 |
|
} |
| 453 |
|
else { |
| 454 |
|
/* INIT PASS 2 */ |
| 455 |
+ |
#ifndef PMAP_SIGUSR |
| 456 |
|
double srcPhotonFlux, avgPhotonFlux; |
| 457 |
+ |
#endif |
| 458 |
|
|
| 459 |
|
/* Based on the outcome of the predistribution we can now |
| 460 |
|
* figure out how many more photons we have to emit from |
| 476 |
|
srcPhotonFlux = srcFlux [srcIdx] / srcNumEmit; |
| 477 |
|
avgPhotonFlux = photonFluxSum / (srcIdx + 1); |
| 478 |
|
|
| 479 |
< |
if (avgPhotonFlux > 0 && |
| 479 |
> |
if (avgPhotonFlux > FTINY && |
| 480 |
|
srcPhotonFlux / avgPhotonFlux < FTINY) { |
| 481 |
|
/* Skip source if its photon flux is grossly below the |
| 482 |
< |
* running average, indicating negligible contribs at |
| 483 |
< |
* the expense of excessive distribution time */ |
| 484 |
< |
sprintf(errmsg, "proc %d, source %s: " |
| 485 |
< |
"itsy bitsy photon flux, skipped", |
| 486 |
< |
proc, source [srcIdx].so -> oname); |
| 487 |
< |
error(WARNING, errmsg); |
| 488 |
< |
srcNumEmit = 0; |
| 482 |
> |
* running average, indicating negligible contributions |
| 483 |
> |
* at the expense of excessive distribution time; only |
| 484 |
> |
* output from subproc 0 to reduce console clutter */ |
| 485 |
> |
if (!proc) { |
| 486 |
> |
sprintf(errmsg, |
| 487 |
> |
"source %s: itsy bitsy photon flux, skipped", |
| 488 |
> |
source [srcIdx].so -> oname); |
| 489 |
> |
error(WARNING, errmsg); |
| 490 |
> |
} |
| 491 |
> |
|
| 492 |
> |
srcNumEmit = 0; /* Or just break??? */ |
| 493 |
|
} |
| 494 |
|
|
| 495 |
|
/* Update sum of photon flux per light source */ |
| 496 |
|
photonFluxSum += srcPhotonFlux; |
| 497 |
|
} |
| 498 |
< |
|
| 498 |
> |
|
| 499 |
|
portCnt = 0; |
| 500 |
|
do { /* Need at least one iteration if no ports! */ |
| 501 |
|
emap.src = source + srcIdx; |
| 502 |
|
emap.port = emap.src -> sflags & SDISTANT |
| 503 |
|
? photonPorts + portCnt : NULL; |
| 504 |
|
photonPartition [emap.src -> so -> otype] (&emap); |
| 505 |
< |
|
| 506 |
< |
if (photonRepTime && !proc) { |
| 505 |
> |
|
| 506 |
> |
if (verbose && !proc) { |
| 507 |
> |
/* Output from subproc 0 only to avoid race condition |
| 508 |
> |
* on console I/O */ |
| 509 |
|
if (!passCnt) |
| 510 |
< |
sprintf(errmsg, "PREPASS %d on source %s (mod %s) ", |
| 511 |
< |
prePassCnt, source [srcIdx].so -> oname, |
| 406 |
< |
objptr(source[srcIdx].so->omod) -> oname); |
| 510 |
> |
sprintf(errmsg, "\tPREPASS %d on source %s ", |
| 511 |
> |
prePassCnt, source [srcIdx].so -> oname); |
| 512 |
|
else |
| 513 |
< |
sprintf(errmsg, "MAIN PASS on source %s (mod %s) ", |
| 514 |
< |
source [srcIdx].so -> oname, |
| 515 |
< |
objptr(source[srcIdx].so->omod) -> oname); |
| 411 |
< |
|
| 513 |
> |
sprintf(errmsg, "\tMAIN PASS on source %s ", |
| 514 |
> |
source [srcIdx].so -> oname); |
| 515 |
> |
|
| 516 |
|
if (emap.port) { |
| 517 |
|
sprintf(errmsg2, "via port %s ", |
| 518 |
|
photonPorts [portCnt].so -> oname); |
| 519 |
|
strcat(errmsg, errmsg2); |
| 520 |
|
} |
| 521 |
< |
|
| 521 |
> |
|
| 522 |
|
sprintf(errmsg2, "(%lu partitions)\n", |
| 523 |
|
emap.numPartitions); |
| 524 |
< |
strcat(errmsg, errmsg2); |
| 524 |
> |
strcat(errmsg, errmsg2); |
| 525 |
|
eputs(errmsg); |
| 526 |
+ |
#if NIX |
| 527 |
|
fflush(stderr); |
| 528 |
< |
} |
| 528 |
> |
#endif |
| 529 |
> |
} |
| 530 |
|
|
| 531 |
|
for (emap.partitionCnt = 0; emap.partitionCnt < emap.numPartitions; |
| 532 |
|
emap.partitionCnt++) { |
| 533 |
+ |
#ifndef PMAP_SIGUSR |
| 534 |
|
double partNumEmit; |
| 535 |
|
unsigned long partEmitCnt; |
| 536 |
+ |
#endif |
| 537 |
|
|
| 538 |
|
/* Get photon origin within current source partishunn |
| 539 |
|
* and build emission map */ |
| 552 |
|
partEmitCnt++; |
| 553 |
|
|
| 554 |
|
/* Update local and shared global emission counter */ |
| 447 |
– |
localNumEmitted += partEmitCnt; |
| 555 |
|
photonCnt [PHOTONCNT_NUMEMIT(srcIdx)] += partEmitCnt; |
| 556 |
+ |
localNumEmitted += partEmitCnt; |
| 557 |
|
|
| 558 |
< |
/* Integer counter avoids FP rounding errors */ |
| 558 |
> |
/* Integer counter avoids FP rounding errors during |
| 559 |
> |
* iteration */ |
| 560 |
|
while (partEmitCnt--) { |
| 561 |
|
RAY photonRay; |
| 562 |
|
|
| 565 |
|
* until absorbed/leaked; emitPhoton() sets the |
| 566 |
|
* emitting light source index in photonRay */ |
| 567 |
|
emitPhoton(&emap, &photonRay); |
| 568 |
+ |
#if 1 |
| 569 |
+ |
if (emap.port) |
| 570 |
+ |
/* !!! PHOTON PORT REJECTION SAMPLING HACK: set |
| 571 |
+ |
* !!! photon port as fake hit object for |
| 572 |
+ |
* !!! primary ray to check for intersection in |
| 573 |
+ |
* !!! tracePhoton() */ |
| 574 |
+ |
photonRay.ro = emap.port -> so; |
| 575 |
+ |
#endif |
| 576 |
|
newPhotonPrimary(pm, &photonRay, primaryHeap[proc]); |
| 577 |
|
/* Set subprocess index in photonRay for post- |
| 578 |
|
* distrib primary index linearisation; this is |
| 586 |
|
photonCnt [PHOTONCNT_NUMPHOT] += pm -> numPhotons - |
| 587 |
|
lastNumPhotons; |
| 588 |
|
lastNumPhotons = pm -> numPhotons; |
| 589 |
+ |
#if !NIX |
| 590 |
+ |
/* Synchronous progress report on Windoze */ |
| 591 |
+ |
if (!proc && photonRepTime > 0 && |
| 592 |
+ |
time(NULL) >= repLastTime + photonRepTime) { |
| 593 |
+ |
unsigned s; |
| 594 |
+ |
repComplete = pm -> distribTarget * numProc; |
| 595 |
+ |
repProgress = photonCnt [PHOTONCNT_NUMPHOT]; |
| 596 |
+ |
|
| 597 |
+ |
for (repEmitted = 0, s = 0; s < nsources; s++) |
| 598 |
+ |
repEmitted += photonCnt [PHOTONCNT_NUMEMIT(s)]; |
| 599 |
+ |
|
| 600 |
+ |
pmapDistribReport(); |
| 601 |
+ |
} |
| 602 |
+ |
#endif |
| 603 |
|
} |
| 604 |
|
|
| 605 |
|
portCnt++; |
| 606 |
|
} while (portCnt < numPhotonPorts); |
| 607 |
|
|
| 608 |
< |
if (pm -> numPhotons == srcNumDistrib) |
| 608 |
> |
if (pm -> numPhotons == srcNumDistrib) { |
| 609 |
|
/* Double predistrib factor in case no photons were stored |
| 610 |
|
* for this source and redo pass 1 */ |
| 611 |
|
srcPreDistrib *= 2; |
| 612 |
+ |
} |
| 613 |
|
else { |
| 614 |
|
/* Now do pass 2 */ |
| 615 |
|
passCnt++; |
| 484 |
– |
/* if (photonRepTime) |
| 485 |
– |
eputs("\n"); */ |
| 616 |
|
} |
| 617 |
|
} |
| 618 |
|
} |
| 619 |
|
|
| 620 |
|
/* Flush heap buffa one final time to prevent data corruption */ |
| 621 |
< |
flushPhotonHeap(pm); |
| 492 |
< |
fclose(pm -> heap); |
| 493 |
< |
|
| 621 |
> |
flushPhotonHeap(pm); |
| 622 |
|
/* Flush final photon primary to primary heap file */ |
| 623 |
|
newPhotonPrimary(pm, NULL, primaryHeap [proc]); |
| 624 |
< |
fclose(primaryHeap [proc]); |
| 624 |
> |
/* Heap files closed automatically on exit |
| 625 |
> |
fclose(pm -> heap); |
| 626 |
> |
fclose(primaryHeap [proc]); */ |
| 627 |
|
|
| 628 |
|
#ifdef DEBUG_PMAP |
| 629 |
< |
sprintf(errmsg, "Proc %d exited with total %ld photons\n", proc, |
| 629 |
> |
sprintf(errmsg, "Proc %d total %ld photons\n", proc, |
| 630 |
|
pm -> numPhotons); |
| 631 |
|
eputs(errmsg); |
| 632 |
+ |
fflush(stderr); |
| 633 |
|
#endif |
| 634 |
|
|
| 635 |
+ |
#ifdef PMAP_SIGUSR |
| 636 |
+ |
signal(SIGUSR1, SIG_DFL); |
| 637 |
+ |
#endif |
| 638 |
+ |
|
| 639 |
+ |
#if NIX |
| 640 |
+ |
/* Terminate subprocess */ |
| 641 |
|
exit(0); |
| 642 |
+ |
#endif |
| 643 |
|
} |
| 644 |
|
else if (pid < 0) |
| 645 |
|
error(SYSTEM, "failed to fork subprocess in distribPhotonContrib"); |
| 646 |
|
} |
| 647 |
|
|
| 648 |
+ |
#if NIX |
| 649 |
|
/* PARENT PROCESS CONTINUES HERE */ |
| 511 |
– |
/* Record start time and enable progress report signal handler */ |
| 512 |
– |
repStartTime = time(NULL); |
| 650 |
|
#ifdef SIGCONT |
| 651 |
+ |
/* Enable progress report signal handler */ |
| 652 |
|
signal(SIGCONT, pmapDistribReport); |
| 653 |
|
#endif |
| 516 |
– |
/* |
| 517 |
– |
if (photonRepTime) |
| 518 |
– |
eputs("\n"); */ |
| 519 |
– |
|
| 654 |
|
/* Wait for subprocesses to complete while reporting progress */ |
| 655 |
|
proc = numProc; |
| 656 |
|
while (proc) { |
| 664 |
|
|
| 665 |
|
/* Nod off for a bit and update progress */ |
| 666 |
|
sleep(1); |
| 667 |
< |
|
| 668 |
< |
/* Update progress report from shared subprocess counters */ |
| 667 |
> |
|
| 668 |
> |
/* Asynchronous progress report from shared subprocess counters */ |
| 669 |
|
repComplete = pm -> distribTarget * numProc; |
| 670 |
< |
repProgress = photonCnt [PHOTONCNT_NUMPHOT]; |
| 670 |
> |
repProgress = photonCnt [PHOTONCNT_NUMPHOT]; |
| 671 |
> |
|
| 672 |
|
for (repEmitted = 0, srcIdx = 0; srcIdx < nsources; srcIdx++) |
| 673 |
|
repEmitted += photonCnt [PHOTONCNT_NUMEMIT(srcIdx)]; |
| 674 |
|
|
| 681 |
|
else signal(SIGCONT, pmapDistribReport); |
| 682 |
|
#endif |
| 683 |
|
} |
| 684 |
+ |
#endif /* NIX */ |
| 685 |
|
|
| 686 |
|
/* ================================================================ |
| 687 |
|
* POST-DISTRIBUTION - Set photon flux and build kd-tree, etc. |
| 688 |
|
* ================================================================ */ |
| 689 |
|
#ifdef SIGCONT |
| 690 |
+ |
/* Reset signal handler */ |
| 691 |
|
signal(SIGCONT, SIG_DFL); |
| 692 |
|
#endif |
| 693 |
|
free(emap.samples); |
| 694 |
|
|
| 695 |
|
if (!pm -> numPhotons) |
| 696 |
< |
error(USER, "empty photon map"); |
| 696 |
> |
error(USER, "empty contribution photon map"); |
| 697 |
|
|
| 698 |
|
/* Load per-subprocess primary rays into pm -> primary array */ |
| 699 |
< |
pm -> numPrimary = buildPrimaries(pm, primaryHeap, primaryOfs, numProc); |
| 699 |
> |
/* Dumb compilers apparently need the char** cast */ |
| 700 |
> |
pm -> numPrimary = buildPrimaries(pm, primaryHeap, |
| 701 |
> |
(char**)primaryHeapFname, |
| 702 |
> |
primaryOfs, numProc); |
| 703 |
|
if (!pm -> numPrimary) |
| 704 |
|
error(INTERNAL, "no primary rays in contribution photon map"); |
| 705 |
|
|
| 706 |
|
/* Set photon flux per source */ |
| 707 |
|
for (srcIdx = 0; srcIdx < nsources; srcIdx++) |
| 708 |
|
srcFlux [srcIdx] /= photonCnt [PHOTONCNT_NUMEMIT(srcIdx)]; |
| 709 |
< |
|
| 709 |
> |
#if NIX |
| 710 |
|
/* Photon counters no longer needed, unmap shared memory */ |
| 711 |
|
munmap(photonCnt, sizeof(*photonCnt)); |
| 712 |
|
close(shmFile); |
| 573 |
– |
#if 0 |
| 574 |
– |
shm_unlink(shmFname); |
| 575 |
– |
#else |
| 713 |
|
unlink(shmFname); |
| 714 |
+ |
#else |
| 715 |
+ |
free(photonCnt); |
| 716 |
|
#endif |
| 717 |
|
|
| 718 |
< |
if (photonRepTime) { |
| 719 |
< |
eputs("\nBuilding contrib photon map...\n"); |
| 718 |
> |
if (verbose) { |
| 719 |
> |
eputs("\nBuilding contribution photon map...\n"); |
| 720 |
> |
#if NIX |
| 721 |
|
fflush(stderr); |
| 722 |
+ |
#endif |
| 723 |
|
} |
| 724 |
|
|
| 725 |
|
/* Build underlying data structure; heap is destroyed */ |
| 726 |
< |
buildPhotonMap(pm, srcFlux, primaryOfs, numProc); |
| 726 |
> |
buildPhotonMap(pm, srcFlux, primaryOfs, numProc); |
| 727 |
> |
|
| 728 |
> |
/* Free per-subprocess primary heap files */ |
| 729 |
> |
for (proc = 0; proc < numProc; proc++) |
| 730 |
> |
free(primaryHeapFname [proc]); |
| 731 |
> |
|
| 732 |
> |
free(primaryHeapFname); |
| 733 |
> |
free(primaryHeap); |
| 734 |
> |
free(primaryOfs); |
| 735 |
> |
|
| 736 |
> |
if (verbose) |
| 737 |
> |
eputs("\n"); |
| 738 |
|
} |
