| 2 |
|
static const char RCSid[] = "$Id$"; |
| 3 |
|
#endif |
| 4 |
|
|
| 5 |
+ |
|
| 6 |
|
/* |
| 7 |
|
====================================================================== |
| 8 |
|
Photon map main module |
| 17 |
|
*/ |
| 18 |
|
|
| 19 |
|
|
| 19 |
– |
|
| 20 |
|
#include "pmap.h" |
| 21 |
|
#include "pmapmat.h" |
| 22 |
|
#include "pmapsrc.h" |
| 26 |
|
#include "pmapdiag.h" |
| 27 |
|
#include "otypes.h" |
| 28 |
|
#include <time.h> |
| 29 |
< |
#include <sys/stat.h> |
| 30 |
< |
#include <sys/mman.h> |
| 31 |
< |
#include <sys/wait.h> |
| 29 |
> |
#if NIX |
| 30 |
> |
#include <sys/stat.h> |
| 31 |
> |
#include <sys/mman.h> |
| 32 |
> |
#include <sys/wait.h> |
| 33 |
> |
#endif |
| 34 |
|
|
| 33 |
– |
#define PMAP_REV "$Revision$" |
| 35 |
|
|
| 35 |
– |
|
| 36 |
– |
extern char *octname; |
| 37 |
– |
|
| 38 |
– |
|
| 39 |
– |
|
| 40 |
– |
/* Photon map lookup functions per type */ |
| 41 |
– |
void (*pmapLookup [NUM_PMAP_TYPES])(PhotonMap*, RAY*, COLOR) = { |
| 42 |
– |
photonDensity, photonPreCompDensity, photonDensity, volumePhotonDensity, |
| 43 |
– |
photonDensity, NULL |
| 44 |
– |
}; |
| 45 |
– |
|
| 46 |
– |
|
| 47 |
– |
|
| 48 |
– |
void colorNorm (COLOR c) |
| 49 |
– |
/* Normalise colour channels to average of 1 */ |
| 50 |
– |
{ |
| 51 |
– |
const float avg = colorAvg(c); |
| 52 |
– |
|
| 53 |
– |
if (!avg) |
| 54 |
– |
return; |
| 55 |
– |
|
| 56 |
– |
c [0] /= avg; |
| 57 |
– |
c [1] /= avg; |
| 58 |
– |
c [2] /= avg; |
| 59 |
– |
} |
| 60 |
– |
|
| 61 |
– |
|
| 62 |
– |
|
| 63 |
– |
void loadPmaps (PhotonMap **pmaps, const PhotonMapParams *parm) |
| 64 |
– |
{ |
| 65 |
– |
unsigned t; |
| 66 |
– |
struct stat octstat, pmstat; |
| 67 |
– |
PhotonMap *pm; |
| 68 |
– |
PhotonMapType type; |
| 69 |
– |
|
| 70 |
– |
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 71 |
– |
if (setPmapParam(&pm, parm + t)) { |
| 72 |
– |
/* Check if photon map newer than octree */ |
| 73 |
– |
if (pm -> fileName && octname && |
| 74 |
– |
!stat(pm -> fileName, &pmstat) && !stat(octname, &octstat) && |
| 75 |
– |
octstat.st_mtime > pmstat.st_mtime) { |
| 76 |
– |
sprintf(errmsg, "photon map in file %s may be stale", |
| 77 |
– |
pm -> fileName); |
| 78 |
– |
error(USER, errmsg); |
| 79 |
– |
} |
| 80 |
– |
|
| 81 |
– |
/* Load photon map from file and get its type */ |
| 82 |
– |
if ((type = loadPhotonMap(pm, pm -> fileName)) == PMAP_TYPE_NONE) |
| 83 |
– |
error(USER, "failed loading photon map"); |
| 84 |
– |
|
| 85 |
– |
/* Assign to appropriate photon map type (deleting previously |
| 86 |
– |
* loaded photon map of same type if necessary) */ |
| 87 |
– |
if (pmaps [type]) { |
| 88 |
– |
deletePhotons(pmaps [type]); |
| 89 |
– |
free(pmaps [type]); |
| 90 |
– |
} |
| 91 |
– |
pmaps [type] = pm; |
| 92 |
– |
|
| 93 |
– |
/* Check for invalid density estimate bandwidth */ |
| 94 |
– |
if (pm -> maxGather > pm -> numPhotons) { |
| 95 |
– |
error(WARNING, "adjusting density estimate bandwidth"); |
| 96 |
– |
pm -> minGather = pm -> maxGather = pm -> numPhotons; |
| 97 |
– |
} |
| 98 |
– |
} |
| 99 |
– |
} |
| 100 |
– |
|
| 101 |
– |
|
| 102 |
– |
|
| 36 |
|
void savePmaps (const PhotonMap **pmaps, int argc, char **argv) |
| 37 |
|
{ |
| 38 |
|
unsigned t; |
| 44 |
|
} |
| 45 |
|
|
| 46 |
|
|
| 114 |
– |
|
| 115 |
– |
void cleanUpPmaps (PhotonMap **pmaps) |
| 116 |
– |
{ |
| 117 |
– |
unsigned t; |
| 118 |
– |
|
| 119 |
– |
for (t = 0; t < NUM_PMAP_TYPES; t++) { |
| 120 |
– |
if (pmaps [t]) { |
| 121 |
– |
deletePhotons(pmaps [t]); |
| 122 |
– |
free(pmaps [t]); |
| 123 |
– |
} |
| 124 |
– |
} |
| 125 |
– |
} |
| 126 |
– |
|
| 127 |
– |
|
| 47 |
|
|
| 48 |
|
static int photonParticipate (RAY *ray) |
| 49 |
|
/* Trace photon through participating medium. Returns 1 if passed through, |
| 128 |
|
/* Follow photon as it bounces around... */ |
| 129 |
|
{ |
| 130 |
|
long mod; |
| 131 |
< |
OBJREC* mat; |
| 131 |
> |
OBJREC *mat, *port = NULL; |
| 132 |
> |
|
| 133 |
> |
if (!ray -> parent) { |
| 134 |
> |
/* !!! PHOTON PORT REJECTION SAMPLING HACK: get photon port for |
| 135 |
> |
* !!! primary ray from ray -> ro, then reset the latter to NULL so |
| 136 |
> |
* !!! as not to interfere with localhit() */ |
| 137 |
> |
port = ray -> ro; |
| 138 |
> |
ray -> ro = NULL; |
| 139 |
> |
} |
| 140 |
|
|
| 141 |
|
if (ray -> rlvl > photonMaxBounce) { |
| 142 |
|
#ifdef PMAP_RUNAWAY_WARN |
| 147 |
|
|
| 148 |
|
if (colorAvg(ray -> cext) > FTINY && !photonParticipate(ray)) |
| 149 |
|
return; |
| 150 |
< |
|
| 150 |
> |
|
| 151 |
|
if (localhit(ray, &thescene)) { |
| 152 |
|
mod = ray -> ro -> omod; |
| 153 |
< |
|
| 153 |
> |
|
| 154 |
> |
if (port && ray -> ro != port) { |
| 155 |
> |
/* !!! PHOTON PORT REJECTION SAMPLING HACK !!! |
| 156 |
> |
* Terminate photon if emitted from port without intersecting it; |
| 157 |
> |
* this can happen when the port's partitions extend beyond its |
| 158 |
> |
* actual geometry, e.g. with polygons. Since the total flux |
| 159 |
> |
* relayed by the port is based on the (in this case) larger |
| 160 |
> |
* partition area, it is overestimated; terminating these photons |
| 161 |
> |
* constitutes rejection sampling and thereby compensates any bias |
| 162 |
> |
* incurred by the overestimated flux. */ |
| 163 |
> |
#ifdef PMAP_PORTREJECT_WARN |
| 164 |
> |
sprintf(errmsg, "photon outside port %s", ray -> ro -> oname); |
| 165 |
> |
error(WARNING, errmsg); |
| 166 |
> |
#endif |
| 167 |
> |
return; |
| 168 |
> |
} |
| 169 |
> |
|
| 170 |
|
if ((ray -> clipset && inset(ray -> clipset, mod)) || mod == OVOID) { |
| 171 |
|
/* Transfer ray if modifier is VOID or clipped within antimatta */ |
| 172 |
|
RAY tray; |
| 198 |
|
|
| 199 |
|
repComplete = numPreComp = finalGather * pmap -> numPhotons; |
| 200 |
|
|
| 201 |
< |
if (photonRepTime) { |
| 202 |
< |
sprintf(errmsg, "Precomputing irradiance for %ld global photons...\n", |
| 201 |
> |
if (verbose) { |
| 202 |
> |
sprintf(errmsg, |
| 203 |
> |
"\nPrecomputing irradiance for %ld global photons\n", |
| 204 |
|
numPreComp); |
| 205 |
|
eputs(errmsg); |
| 206 |
+ |
#if NIX |
| 207 |
|
fflush(stderr); |
| 208 |
+ |
#endif |
| 209 |
|
} |
| 210 |
|
|
| 211 |
|
/* Copy photon map for precomputed photons */ |
| 232 |
|
|
| 233 |
|
for (i = 0; i < numPreComp; i++) { |
| 234 |
|
/* Get random photon from stratified distribution in source heap to |
| 235 |
< |
* avoid duplicates and clutering */ |
| 235 |
> |
* avoid duplicates and clustering */ |
| 236 |
|
pIdx = firstPhoton(pmap) + |
| 237 |
|
(unsigned long)((i + pmapRandom(pmap -> randState)) / |
| 238 |
|
finalGather); |
| 270 |
|
deletePhotons(pmap); |
| 271 |
|
memcpy(pmap, &nuPmap, sizeof(PhotonMap)); |
| 272 |
|
|
| 273 |
< |
if (photonRepTime) { |
| 274 |
< |
eputs("Rebuilding precomputed photon map...\n"); |
| 273 |
> |
if (verbose) { |
| 274 |
> |
eputs("\nRebuilding precomputed photon map\n"); |
| 275 |
> |
#if NIX |
| 276 |
|
fflush(stderr); |
| 277 |
+ |
#endif |
| 278 |
|
} |
| 279 |
|
|
| 280 |
|
/* Rebuild underlying data structure, destroying heap */ |
| 293 |
|
void distribPhotons (PhotonMap **pmaps, unsigned numProc) |
| 294 |
|
{ |
| 295 |
|
EmissionMap emap; |
| 296 |
< |
char errmsg2 [128], shmFname [255]; |
| 296 |
> |
char errmsg2 [128], shmFname [PMAP_TMPFNLEN]; |
| 297 |
|
unsigned t, srcIdx, proc; |
| 298 |
|
double totalFlux = 0; |
| 299 |
|
int shmFile, stat, pid; |
| 325 |
|
initPhotonHeap(pmaps [t]); |
| 326 |
|
/* Per-subprocess target count */ |
| 327 |
|
pmaps [t] -> distribTarget /= numProc; |
| 328 |
+ |
|
| 329 |
+ |
if (!pmaps [t] -> distribTarget) |
| 330 |
+ |
error(INTERNAL, "no photons to distribute in distribPhotons"); |
| 331 |
|
} |
| 332 |
|
|
| 333 |
|
initPhotonEmissionFuncs(); |
| 340 |
|
/* Get photon sensor modifiers */ |
| 341 |
|
getPhotonSensors(photonSensorList); |
| 342 |
|
|
| 343 |
+ |
#if NIX |
| 344 |
|
/* Set up shared mem for photon counters (zeroed by ftruncate) */ |
| 345 |
< |
#if 0 |
| 394 |
< |
snprintf(shmFname, 255, PMAP_SHMFNAME, getpid()); |
| 395 |
< |
shmFile = shm_open(shmFname, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR); |
| 396 |
< |
#else |
| 397 |
< |
strcpy(shmFname, PMAP_SHMFNAME); |
| 345 |
> |
strcpy(shmFname, PMAP_TMPFNAME); |
| 346 |
|
shmFile = mkstemp(shmFname); |
| 399 |
– |
#endif |
| 347 |
|
|
| 348 |
< |
if (shmFile < 0) |
| 349 |
< |
error(SYSTEM, "failed opening shared memory file in distribPhotons"); |
| 348 |
> |
if (shmFile < 0 || ftruncate(shmFile, sizeof(*photonCnt)) < 0) |
| 349 |
> |
error(SYSTEM, "failed shared mem init in distribPhotons"); |
| 350 |
|
|
| 404 |
– |
if (ftruncate(shmFile, sizeof(*photonCnt)) < 0) |
| 405 |
– |
error(SYSTEM, "failed setting shared memory size in distribPhotons"); |
| 406 |
– |
|
| 351 |
|
photonCnt = mmap(NULL, sizeof(*photonCnt), PROT_READ | PROT_WRITE, |
| 352 |
|
MAP_SHARED, shmFile, 0); |
| 353 |
|
|
| 354 |
|
if (photonCnt == MAP_FAILED) |
| 355 |
< |
error(SYSTEM, "failed mapping shared memory in distribPhotons"); |
| 355 |
> |
error(SYSTEM, "failed mapping shared memory in distribPhotons"); |
| 356 |
> |
#else |
| 357 |
> |
/* Allocate photon counters statically on Windoze */ |
| 358 |
> |
if (!(photonCnt = malloc(sizeof(PhotonCnt)))) |
| 359 |
> |
error(SYSTEM, "failed trivial malloc in distribPhotons"); |
| 360 |
> |
photonCnt -> numEmitted = photonCnt -> numComplete = 0; |
| 361 |
> |
#endif /* NIX */ |
| 362 |
|
|
| 363 |
< |
if (photonRepTime) |
| 364 |
< |
eputs("\n"); |
| 363 |
> |
if (verbose) { |
| 364 |
> |
sprintf(errmsg, "\nIntegrating flux from %d sources", nsources); |
| 365 |
> |
|
| 366 |
> |
if (photonPorts) { |
| 367 |
> |
sprintf(errmsg2, " via %d ports", numPhotonPorts); |
| 368 |
> |
strcat(errmsg, errmsg2); |
| 369 |
> |
} |
| 370 |
> |
|
| 371 |
> |
strcat(errmsg, "\n"); |
| 372 |
> |
eputs(errmsg); |
| 373 |
> |
} |
| 374 |
|
|
| 375 |
|
/* =================================================================== |
| 376 |
|
* FLUX INTEGRATION - Get total photon flux from light sources |
| 384 |
|
: NULL; |
| 385 |
|
photonPartition [emap.src -> so -> otype] (&emap); |
| 386 |
|
|
| 387 |
< |
if (photonRepTime) { |
| 388 |
< |
sprintf(errmsg, "Integrating flux from source %s ", |
| 387 |
> |
if (verbose) { |
| 388 |
> |
sprintf(errmsg, "\tIntegrating flux from source %s ", |
| 389 |
|
source [srcIdx].so -> oname); |
| 390 |
< |
|
| 390 |
> |
|
| 391 |
|
if (emap.port) { |
| 392 |
|
sprintf(errmsg2, "via port %s ", |
| 393 |
|
photonPorts [portCnt].so -> oname); |
| 394 |
|
strcat(errmsg, errmsg2); |
| 395 |
|
} |
| 396 |
< |
|
| 397 |
< |
sprintf(errmsg2, "(%lu partitions)...\n", emap.numPartitions); |
| 396 |
> |
|
| 397 |
> |
sprintf(errmsg2, "(%lu partitions)\n", emap.numPartitions); |
| 398 |
|
strcat(errmsg, errmsg2); |
| 399 |
|
eputs(errmsg); |
| 400 |
+ |
#if NIX |
| 401 |
|
fflush(stderr); |
| 402 |
+ |
#endif |
| 403 |
|
} |
| 404 |
|
|
| 405 |
|
for (emap.partitionCnt = 0; emap.partitionCnt < emap.numPartitions; |
| 414 |
|
|
| 415 |
|
if (totalFlux < FTINY) |
| 416 |
|
error(USER, "zero flux from light sources"); |
| 417 |
+ |
|
| 418 |
+ |
/* Record start time for progress reports */ |
| 419 |
+ |
repStartTime = time(NULL); |
| 420 |
|
|
| 421 |
+ |
if (verbose) { |
| 422 |
+ |
sprintf(errmsg, "\nPhoton distribution @ %d procs\n", numProc); |
| 423 |
+ |
eputs(errmsg); |
| 424 |
+ |
} |
| 425 |
+ |
|
| 426 |
|
/* MAIN LOOP */ |
| 427 |
|
for (proc = 0; proc < numProc; proc++) { |
| 428 |
+ |
#if NIX |
| 429 |
|
if (!(pid = fork())) { |
| 430 |
< |
/* SUBPROCESS ENTERS HERE. |
| 431 |
< |
All opened and memory mapped files are inherited */ |
| 430 |
> |
/* SUBPROCESS ENTERS HERE; open and mmapped files inherited */ |
| 431 |
> |
#else |
| 432 |
> |
if (1) { |
| 433 |
> |
/* No subprocess under Windoze */ |
| 434 |
> |
#endif |
| 435 |
> |
/* Local photon counters for this subprocess */ |
| 436 |
|
unsigned passCnt = 0, prePassCnt = 0; |
| 437 |
|
unsigned long lastNumPhotons [NUM_PMAP_TYPES]; |
| 438 |
|
unsigned long localNumEmitted = 0; /* Num photons emitted by this |
| 440 |
|
|
| 441 |
|
/* Seed RNGs from PID for decorellated photon distribution */ |
| 442 |
|
pmapSeed(randSeed + proc, partState); |
| 443 |
< |
pmapSeed(randSeed + proc, emitState); |
| 444 |
< |
pmapSeed(randSeed + proc, cntState); |
| 445 |
< |
pmapSeed(randSeed + proc, mediumState); |
| 446 |
< |
pmapSeed(randSeed + proc, scatterState); |
| 447 |
< |
pmapSeed(randSeed + proc, rouletteState); |
| 443 |
> |
pmapSeed(randSeed + (proc + 1) % numProc, emitState); |
| 444 |
> |
pmapSeed(randSeed + (proc + 2) % numProc, cntState); |
| 445 |
> |
pmapSeed(randSeed + (proc + 3) % numProc, mediumState); |
| 446 |
> |
pmapSeed(randSeed + (proc + 4) % numProc, scatterState); |
| 447 |
> |
pmapSeed(randSeed + (proc + 5) % numProc, rouletteState); |
| 448 |
|
|
| 449 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 450 |
|
lastNumPhotons [t] = 0; |
| 465 |
|
* iterations; make it clear to user which photon maps are |
| 466 |
|
* missing so (s)he can check geometry and materials */ |
| 467 |
|
if (++prePassCnt > maxPreDistrib) { |
| 468 |
< |
sprintf(errmsg, |
| 495 |
< |
"proc %d, source %s: too many prepasses", |
| 496 |
< |
proc, source [srcIdx].so -> oname); |
| 468 |
> |
sprintf(errmsg, "proc %d: too many prepasses", proc); |
| 469 |
|
|
| 470 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 471 |
|
if (pmaps [t] && !pmaps [t] -> numPhotons) { |
| 537 |
|
break; |
| 538 |
|
} |
| 539 |
|
|
| 540 |
< |
/* Update shared completion counter for prog.report by parent */ |
| 540 |
> |
/* Update shared completion counter for progreport by parent */ |
| 541 |
|
photonCnt -> numComplete += numEmit; |
| 542 |
|
|
| 543 |
|
/* PHOTON DISTRIBUTION LOOP */ |
| 550 |
|
? photonPorts + portCnt : NULL; |
| 551 |
|
photonPartition [emap.src -> so -> otype] (&emap); |
| 552 |
|
|
| 553 |
< |
if (photonRepTime && !proc) { |
| 553 |
> |
if (verbose && !proc) { |
| 554 |
> |
/* Output from subproc 0 only to avoid race condition |
| 555 |
> |
* on console I/O */ |
| 556 |
|
if (!passCnt) |
| 557 |
< |
sprintf(errmsg, "PREPASS %d on source %s ", |
| 557 |
> |
sprintf(errmsg, "\tPREPASS %d on source %s ", |
| 558 |
|
prePassCnt, source [srcIdx].so -> oname); |
| 559 |
|
else |
| 560 |
< |
sprintf(errmsg, "MAIN PASS on source %s ", |
| 560 |
> |
sprintf(errmsg, "\tMAIN PASS on source %s ", |
| 561 |
|
source [srcIdx].so -> oname); |
| 562 |
< |
|
| 562 |
> |
|
| 563 |
|
if (emap.port) { |
| 564 |
|
sprintf(errmsg2, "via port %s ", |
| 565 |
|
photonPorts [portCnt].so -> oname); |
| 566 |
|
strcat(errmsg, errmsg2); |
| 567 |
|
} |
| 568 |
< |
|
| 568 |
> |
|
| 569 |
|
sprintf(errmsg2, "(%lu partitions)\n", |
| 570 |
|
emap.numPartitions); |
| 571 |
|
strcat(errmsg, errmsg2); |
| 572 |
|
eputs(errmsg); |
| 573 |
+ |
#if NIX |
| 574 |
|
fflush(stderr); |
| 575 |
+ |
#endif |
| 576 |
|
} |
| 577 |
|
|
| 578 |
|
for (emap.partitionCnt = 0; emap.partitionCnt < emap.numPartitions; |
| 587 |
|
|
| 588 |
|
/* Number of photons to emit from ziss partishunn -- |
| 589 |
|
* proportional to flux; photon ray weight and scalar |
| 590 |
< |
* flux are uniform (the latter only varying in RGB). |
| 615 |
< |
* */ |
| 590 |
> |
* flux are uniform (latter only varying in RGB). */ |
| 591 |
|
partNumEmit = numEmit * colorAvg(emap.partFlux) / |
| 592 |
|
totalFlux; |
| 593 |
|
partEmitCnt = (unsigned long)partNumEmit; |
| 608 |
|
/* Emit photon based on PDF and trace through scene |
| 609 |
|
* until absorbed/leaked */ |
| 610 |
|
emitPhoton(&emap, &photonRay); |
| 611 |
+ |
#if 1 |
| 612 |
+ |
if (emap.port) |
| 613 |
+ |
/* !!! PHOTON PORT REJECTION SAMPLING HACK: set |
| 614 |
+ |
* !!! photon port as fake hit object for |
| 615 |
+ |
* !!! primary ray to check for intersection in |
| 616 |
+ |
* !!! tracePhoton() */ |
| 617 |
+ |
photonRay.ro = emap.port -> so; |
| 618 |
+ |
#endif |
| 619 |
|
tracePhoton(&photonRay); |
| 620 |
|
} |
| 621 |
< |
|
| 621 |
> |
|
| 622 |
|
/* Update shared global photon count for each pmap */ |
| 623 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 624 |
|
if (pmaps [t]) { |
| 626 |
|
pmaps [t] -> numPhotons - lastNumPhotons [t]; |
| 627 |
|
lastNumPhotons [t] = pmaps [t] -> numPhotons; |
| 628 |
|
} |
| 629 |
+ |
#if !NIX |
| 630 |
+ |
/* Synchronous progress report on Windoze */ |
| 631 |
+ |
if (!proc && photonRepTime > 0 && |
| 632 |
+ |
time(NULL) >= repLastTime + photonRepTime) { |
| 633 |
+ |
repEmitted = repProgress = photonCnt -> numEmitted; |
| 634 |
+ |
repComplete = photonCnt -> numComplete; |
| 635 |
+ |
pmapDistribReport(); |
| 636 |
+ |
} |
| 637 |
+ |
#endif |
| 638 |
|
} |
| 639 |
|
|
| 640 |
|
portCnt++; |
| 650 |
|
break; |
| 651 |
|
} |
| 652 |
|
|
| 653 |
< |
if (t >= NUM_PMAP_TYPES) { |
| 653 |
> |
if (t >= NUM_PMAP_TYPES) |
| 654 |
|
/* No empty photon maps found; now do pass 2 */ |
| 655 |
|
passCnt++; |
| 664 |
– |
#if 0 |
| 665 |
– |
if (photonRepTime) |
| 666 |
– |
eputs("\n"); |
| 667 |
– |
#endif |
| 668 |
– |
} |
| 656 |
|
} while (passCnt < 2); |
| 657 |
|
|
| 658 |
< |
/* Unmap shared photon counters */ |
| 659 |
< |
#if 0 |
| 673 |
< |
munmap(photonCnt, sizeof(*photonCnt)); |
| 674 |
< |
close(shmFile); |
| 675 |
< |
#endif |
| 676 |
< |
|
| 677 |
< |
/* Flush heap buffa for every pmap one final time; this is required |
| 678 |
< |
* to prevent data corruption! */ |
| 658 |
> |
/* Flush heap buffa for every pmap one final time; |
| 659 |
> |
* avoids potential data corruption! */ |
| 660 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 661 |
|
if (pmaps [t]) { |
| 681 |
– |
#if 0 |
| 682 |
– |
eputs("Final flush\n"); |
| 683 |
– |
#endif |
| 662 |
|
flushPhotonHeap(pmaps [t]); |
| 663 |
< |
fclose(pmaps [t] -> heap); |
| 663 |
> |
/* Heap file closed automatically on exit |
| 664 |
> |
fclose(pmaps [t] -> heap); */ |
| 665 |
|
#ifdef DEBUG_PMAP |
| 666 |
< |
sprintf(errmsg, "Proc %d: total %ld photons\n", getpid(), |
| 666 |
> |
sprintf(errmsg, "Proc %d: total %ld photons\n", proc, |
| 667 |
|
pmaps [t] -> numPhotons); |
| 668 |
|
eputs(errmsg); |
| 669 |
|
#endif |
| 670 |
|
} |
| 671 |
< |
|
| 671 |
> |
#if NIX |
| 672 |
> |
/* Terminate subprocess */ |
| 673 |
|
exit(0); |
| 674 |
+ |
#endif |
| 675 |
|
} |
| 676 |
|
else if (pid < 0) |
| 677 |
|
error(SYSTEM, "failed to fork subprocess in distribPhotons"); |
| 678 |
|
} |
| 679 |
|
|
| 680 |
+ |
#if NIX |
| 681 |
|
/* PARENT PROCESS CONTINUES HERE */ |
| 700 |
– |
/* Record start time and enable progress report signal handler */ |
| 701 |
– |
repStartTime = time(NULL); |
| 682 |
|
#ifdef SIGCONT |
| 683 |
+ |
/* Enable progress report signal handler */ |
| 684 |
|
signal(SIGCONT, pmapDistribReport); |
| 685 |
< |
#endif |
| 686 |
< |
|
| 706 |
< |
if (photonRepTime) |
| 707 |
< |
eputs("\n"); |
| 708 |
< |
|
| 709 |
< |
/* Wait for subprocesses to complete while reporting progress */ |
| 685 |
> |
#endif |
| 686 |
> |
/* Wait for subprocesses complete while reporting progress */ |
| 687 |
|
proc = numProc; |
| 688 |
|
while (proc) { |
| 689 |
|
while (waitpid(-1, &stat, WNOHANG) > 0) { |
| 696 |
|
|
| 697 |
|
/* Nod off for a bit and update progress */ |
| 698 |
|
sleep(1); |
| 699 |
< |
/* Update progress report from shared subprocess counters */ |
| 699 |
> |
|
| 700 |
> |
/* Asynchronous progress report from shared subprocess counters */ |
| 701 |
|
repEmitted = repProgress = photonCnt -> numEmitted; |
| 702 |
< |
repComplete = photonCnt -> numComplete; |
| 702 |
> |
repComplete = photonCnt -> numComplete; |
| 703 |
|
|
| 704 |
+ |
repProgress = repComplete = 0; |
| 705 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 706 |
|
if ((pm = pmaps [t])) { |
| 728 |
– |
#if 0 |
| 729 |
– |
/* Get photon count from heapfile size for progress update */ |
| 730 |
– |
fseek(pm -> heap, 0, SEEK_END); |
| 731 |
– |
pm -> numPhotons = ftell(pm -> heap) / sizeof(Photon); */ |
| 732 |
– |
#else |
| 707 |
|
/* Get global photon count from shmem updated by subprocs */ |
| 708 |
< |
pm -> numPhotons = photonCnt -> numPhotons [t]; |
| 709 |
< |
#endif |
| 708 |
> |
repProgress += pm -> numPhotons = photonCnt -> numPhotons [t]; |
| 709 |
> |
repComplete += pm -> distribTarget; |
| 710 |
|
} |
| 711 |
+ |
repComplete *= numProc; |
| 712 |
|
|
| 713 |
|
if (photonRepTime > 0 && time(NULL) >= repLastTime + photonRepTime) |
| 714 |
|
pmapDistribReport(); |
| 716 |
|
else signal(SIGCONT, pmapDistribReport); |
| 717 |
|
#endif |
| 718 |
|
} |
| 719 |
+ |
#endif /* NIX */ |
| 720 |
|
|
| 721 |
|
/* =================================================================== |
| 722 |
|
* POST-DISTRIBUTION - Set photon flux and build data struct for photon |
| 723 |
|
* storage, etc. |
| 724 |
|
* =================================================================== */ |
| 725 |
|
#ifdef SIGCONT |
| 726 |
+ |
/* Reset signal handler */ |
| 727 |
|
signal(SIGCONT, SIG_DFL); |
| 728 |
|
#endif |
| 729 |
|
free(emap.samples); |
| 730 |
|
|
| 731 |
< |
/* Set photon flux (repProgress is total num emitted) */ |
| 731 |
> |
/* Set photon flux */ |
| 732 |
|
totalFlux /= photonCnt -> numEmitted; |
| 733 |
< |
|
| 733 |
> |
#if NIX |
| 734 |
|
/* Photon counters no longer needed, unmap shared memory */ |
| 735 |
|
munmap(photonCnt, sizeof(*photonCnt)); |
| 736 |
|
close(shmFile); |
| 760 |
– |
#if 0 |
| 761 |
– |
shm_unlink(shmFname); |
| 762 |
– |
#else |
| 737 |
|
unlink(shmFname); |
| 738 |
+ |
#else |
| 739 |
+ |
free(photonCnt); |
| 740 |
|
#endif |
| 741 |
< |
|
| 741 |
> |
if (verbose) |
| 742 |
> |
eputs("\n"); |
| 743 |
> |
|
| 744 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 745 |
|
if (pmaps [t]) { |
| 746 |
< |
if (photonRepTime) { |
| 747 |
< |
sprintf(errmsg, "\nBuilding %s photon map...\n", pmapName [t]); |
| 746 |
> |
if (verbose) { |
| 747 |
> |
sprintf(errmsg, "Building %s photon map\n", pmapName [t]); |
| 748 |
|
eputs(errmsg); |
| 749 |
+ |
#if NIX |
| 750 |
|
fflush(stderr); |
| 751 |
+ |
#endif |
| 752 |
|
} |
| 753 |
|
|
| 754 |
|
/* Build underlying data structure; heap is destroyed */ |
| 755 |
|
buildPhotonMap(pmaps [t], &totalFlux, NULL, numProc); |
| 756 |
|
} |
| 757 |
< |
|
| 757 |
> |
|
| 758 |
|
/* Precompute photon irradiance if necessary */ |
| 759 |
< |
if (preCompPmap) |
| 759 |
> |
if (preCompPmap) { |
| 760 |
> |
if (verbose) |
| 761 |
> |
eputs("\n"); |
| 762 |
|
preComputeGlobal(preCompPmap); |
| 763 |
< |
} |
| 782 |
< |
|
| 783 |
< |
|
| 784 |
< |
|
| 785 |
< |
void photonDensity (PhotonMap *pmap, RAY *ray, COLOR irrad) |
| 786 |
< |
/* Photon density estimate. Returns irradiance at ray -> rop. */ |
| 787 |
< |
{ |
| 788 |
< |
unsigned i; |
| 789 |
< |
float r; |
| 790 |
< |
COLOR flux; |
| 791 |
< |
Photon *photon; |
| 792 |
< |
const PhotonSearchQueueNode *sqn; |
| 793 |
< |
|
| 794 |
< |
setcolor(irrad, 0, 0, 0); |
| 795 |
< |
|
| 796 |
< |
if (!pmap -> maxGather) |
| 797 |
< |
return; |
| 798 |
< |
|
| 799 |
< |
/* Ignore sources */ |
| 800 |
< |
if (ray -> ro && islight(objptr(ray -> ro -> omod) -> otype)) |
| 801 |
< |
return; |
| 802 |
< |
|
| 803 |
< |
findPhotons(pmap, ray); |
| 763 |
> |
} |
| 764 |
|
|
| 765 |
< |
/* Need at least 2 photons */ |
| 766 |
< |
if (pmap -> squeue.tail < 2) { |
| 807 |
< |
#ifdef PMAP_NONEFOUND |
| 808 |
< |
sprintf(errmsg, "no photons found on %s at (%.3f, %.3f, %.3f)", |
| 809 |
< |
ray -> ro ? ray -> ro -> oname : "<null>", |
| 810 |
< |
ray -> rop [0], ray -> rop [1], ray -> rop [2]); |
| 811 |
< |
error(WARNING, errmsg); |
| 812 |
< |
#endif |
| 813 |
< |
|
| 814 |
< |
return; |
| 815 |
< |
} |
| 816 |
< |
|
| 817 |
< |
if (pmap -> minGather == pmap -> maxGather) { |
| 818 |
< |
/* No bias compensation. Just do a plain vanilla estimate */ |
| 819 |
< |
sqn = pmap -> squeue.node + 1; |
| 820 |
< |
|
| 821 |
< |
/* Average radius between furthest two photons to improve accuracy */ |
| 822 |
< |
r = max(sqn -> dist2, (sqn + 1) -> dist2); |
| 823 |
< |
r = 0.25 * (pmap -> maxDist2 + r + 2 * sqrt(pmap -> maxDist2 * r)); |
| 824 |
< |
|
| 825 |
< |
/* Skip the extra photon */ |
| 826 |
< |
for (i = 1 ; i < pmap -> squeue.tail; i++, sqn++) { |
| 827 |
< |
photon = getNearestPhoton(&pmap -> squeue, sqn -> idx); |
| 828 |
< |
getPhotonFlux(photon, flux); |
| 829 |
< |
#ifdef PMAP_EPANECHNIKOV |
| 830 |
< |
/* Apply Epanechnikov kernel to photon flux based on photon dist */ |
| 831 |
< |
scalecolor(flux, 2 * (1 - sqn -> dist2 / r)); |
| 832 |
< |
#endif |
| 833 |
< |
addcolor(irrad, flux); |
| 834 |
< |
} |
| 835 |
< |
|
| 836 |
< |
/* Divide by search area PI * r^2, 1 / PI required as ambient |
| 837 |
< |
normalisation factor */ |
| 838 |
< |
scalecolor(irrad, 1 / (PI * PI * r)); |
| 839 |
< |
|
| 840 |
< |
return; |
| 841 |
< |
} |
| 842 |
< |
else |
| 843 |
< |
/* Apply bias compensation to density estimate */ |
| 844 |
< |
biasComp(pmap, irrad); |
| 845 |
< |
} |
| 846 |
< |
|
| 847 |
< |
|
| 848 |
< |
|
| 849 |
< |
void photonPreCompDensity (PhotonMap *pmap, RAY *r, COLOR irrad) |
| 850 |
< |
/* Returns precomputed photon density estimate at ray -> rop. */ |
| 851 |
< |
{ |
| 852 |
< |
Photon p; |
| 853 |
< |
|
| 854 |
< |
setcolor(irrad, 0, 0, 0); |
| 855 |
< |
|
| 856 |
< |
/* Ignore sources */ |
| 857 |
< |
if (r -> ro && islight(objptr(r -> ro -> omod) -> otype)) |
| 858 |
< |
return; |
| 859 |
< |
|
| 860 |
< |
find1Photon(preCompPmap, r, &p); |
| 861 |
< |
getPhotonFlux(&p, irrad); |
| 862 |
< |
} |
| 863 |
< |
|
| 864 |
< |
|
| 865 |
< |
|
| 866 |
< |
void volumePhotonDensity (PhotonMap *pmap, RAY *ray, COLOR irrad) |
| 867 |
< |
/* Photon volume density estimate. Returns irradiance at ray -> rop. */ |
| 868 |
< |
{ |
| 869 |
< |
unsigned i; |
| 870 |
< |
float r, gecc2, ph; |
| 871 |
< |
COLOR flux; |
| 872 |
< |
Photon *photon; |
| 873 |
< |
const PhotonSearchQueueNode *sqn; |
| 874 |
< |
|
| 875 |
< |
setcolor(irrad, 0, 0, 0); |
| 876 |
< |
|
| 877 |
< |
if (!pmap -> maxGather) |
| 878 |
< |
return; |
| 879 |
< |
|
| 880 |
< |
findPhotons(pmap, ray); |
| 881 |
< |
|
| 882 |
< |
/* Need at least 2 photons */ |
| 883 |
< |
if (pmap -> squeue.tail < 2) |
| 884 |
< |
return; |
| 885 |
< |
|
| 886 |
< |
#if 0 |
| 887 |
< |
/* Volume biascomp disabled (probably redundant) */ |
| 888 |
< |
if (pmap -> minGather == pmap -> maxGather) |
| 889 |
< |
#endif |
| 890 |
< |
{ |
| 891 |
< |
/* No bias compensation. Just do a plain vanilla estimate */ |
| 892 |
< |
gecc2 = ray -> gecc * ray -> gecc; |
| 893 |
< |
sqn = pmap -> squeue.node + 1; |
| 894 |
< |
|
| 895 |
< |
/* Average radius between furthest two photons to improve accuracy */ |
| 896 |
< |
r = max(sqn -> dist2, (sqn + 1) -> dist2); |
| 897 |
< |
r = 0.25 * (pmap -> maxDist2 + r + 2 * sqrt(pmap -> maxDist2 * r)); |
| 898 |
< |
|
| 899 |
< |
/* Skip the extra photon */ |
| 900 |
< |
for (i = 1; i < pmap -> squeue.tail; i++, sqn++) { |
| 901 |
< |
photon = getNearestPhoton(&pmap -> squeue, sqn -> idx); |
| 902 |
< |
|
| 903 |
< |
/* Compute phase function for inscattering from photon */ |
| 904 |
< |
if (gecc2 <= FTINY) |
| 905 |
< |
ph = 1; |
| 906 |
< |
else { |
| 907 |
< |
ph = DOT(ray -> rdir, photon -> norm) / 127; |
| 908 |
< |
ph = 1 + gecc2 - 2 * ray -> gecc * ph; |
| 909 |
< |
ph = (1 - gecc2) / (ph * sqrt(ph)); |
| 910 |
< |
} |
| 911 |
< |
|
| 912 |
< |
getPhotonFlux(photon, flux); |
| 913 |
< |
scalecolor(flux, ph); |
| 914 |
< |
addcolor(irrad, flux); |
| 915 |
< |
} |
| 916 |
< |
|
| 917 |
< |
/* Divide by search volume 4 / 3 * PI * r^3 and phase function |
| 918 |
< |
normalization factor 1 / (4 * PI) */ |
| 919 |
< |
scalecolor(irrad, 3 / (16 * PI * PI * r * sqrt(r))); |
| 920 |
< |
return; |
| 921 |
< |
} |
| 922 |
< |
#if 0 |
| 923 |
< |
else |
| 924 |
< |
/* Apply bias compensation to density estimate */ |
| 925 |
< |
volumeBiasComp(pmap, ray, irrad); |
| 926 |
< |
#endif |
| 765 |
> |
if (verbose) |
| 766 |
> |
eputs("\n"); |
| 767 |
|
} |
