| 2 |
|
static const char RCSid[] = "$Id$"; |
| 3 |
|
#endif |
| 4 |
|
|
| 5 |
+ |
|
| 6 |
|
/* |
| 7 |
|
====================================================================== |
| 8 |
|
Photon map main module |
| 9 |
|
|
| 10 |
|
Roland Schregle (roland.schregle@{hslu.ch, gmail.com}) |
| 11 |
|
(c) Fraunhofer Institute for Solar Energy Systems, |
| 12 |
+ |
supported by the German Research Foundation |
| 13 |
+ |
(DFG LU-204/10-2, "Fassadenintegrierte Regelsysteme FARESYS") |
| 14 |
|
(c) Lucerne University of Applied Sciences and Arts, |
| 15 |
< |
supported by the Swiss National Science Foundation (SNSF, #147053) |
| 15 |
> |
supported by the Swiss National Science Foundation |
| 16 |
> |
(SNSF #147053, "Daylight Redirecting Components") |
| 17 |
|
====================================================================== |
| 18 |
|
|
| 19 |
|
$Id$ |
| 20 |
|
*/ |
| 21 |
|
|
| 22 |
|
|
| 19 |
– |
|
| 23 |
|
#include "pmap.h" |
| 24 |
|
#include "pmapmat.h" |
| 25 |
|
#include "pmapsrc.h" |
| 28 |
|
#include "pmapbias.h" |
| 29 |
|
#include "pmapdiag.h" |
| 30 |
|
#include "otypes.h" |
| 31 |
+ |
#include "otspecial.h" |
| 32 |
|
#include <time.h> |
| 33 |
< |
#include <sys/stat.h> |
| 34 |
< |
#include <sys/mman.h> |
| 35 |
< |
#include <sys/wait.h> |
| 33 |
> |
#if NIX |
| 34 |
> |
#include <sys/stat.h> |
| 35 |
> |
#include <sys/mman.h> |
| 36 |
> |
#include <sys/wait.h> |
| 37 |
> |
#endif |
| 38 |
|
|
| 39 |
|
|
| 34 |
– |
|
| 40 |
|
void savePmaps (const PhotonMap **pmaps, int argc, char **argv) |
| 41 |
|
{ |
| 42 |
|
unsigned t; |
| 54 |
|
or 0 if absorbed and $*%&ed. Analogon to rayparticipate(). */ |
| 55 |
|
{ |
| 56 |
|
int i; |
| 57 |
< |
RREAL cosTheta, cosPhi, du, dv; |
| 57 |
> |
RREAL xi1, cosTheta, phi, du, dv; |
| 58 |
|
const float cext = colorAvg(ray -> cext), |
| 59 |
< |
albedo = colorAvg(ray -> albedo); |
| 59 |
> |
albedo = colorAvg(ray -> albedo), |
| 60 |
> |
gecc = ray -> gecc, gecc2 = sqr(gecc); |
| 61 |
|
FVECT u, v; |
| 62 |
|
COLOR cvext; |
| 63 |
|
|
| 65 |
|
ray -> rmax = -log(pmapRandom(mediumState)) / cext; |
| 66 |
|
|
| 67 |
|
while (!localhit(ray, &thescene)) { |
| 68 |
+ |
if (!incube(&thescene, ray -> rop)) { |
| 69 |
+ |
/* Terminate photon if it has leaked from the scene */ |
| 70 |
+ |
#ifdef DEBUG_PMAP |
| 71 |
+ |
fprintf(stderr, |
| 72 |
+ |
"Volume photon leaked from scene at [%.3f %.3f %.3f]\n", |
| 73 |
+ |
ray -> rop [0], ray -> rop [1], ray -> rop [2]); |
| 74 |
+ |
#endif |
| 75 |
+ |
return 0; |
| 76 |
+ |
} |
| 77 |
+ |
|
| 78 |
|
setcolor(cvext, exp(-ray -> rmax * ray -> cext [0]), |
| 79 |
|
exp(-ray -> rmax * ray -> cext [1]), |
| 80 |
|
exp(-ray -> rmax * ray -> cext [2])); |
| 84 |
|
colorNorm(ray -> rcol); |
| 85 |
|
VCOPY(ray -> rorg, ray -> rop); |
| 86 |
|
|
| 87 |
+ |
#if 0 |
| 88 |
|
if (albedo > FTINY && ray -> rlvl > 0) |
| 89 |
+ |
#else |
| 90 |
+ |
/* Store volume photons unconditionally in mist to also account for |
| 91 |
+ |
direct inscattering from sources */ |
| 92 |
+ |
if (albedo > FTINY) |
| 93 |
+ |
#endif |
| 94 |
|
/* Add to volume photon map */ |
| 95 |
|
newPhoton(volumePmap, ray); |
| 96 |
|
|
| 103 |
|
scalecolor(ray -> rcol, 1 / albedo); |
| 104 |
|
|
| 105 |
|
/* Scatter photon */ |
| 106 |
< |
cosTheta = ray -> gecc <= FTINY ? 2 * pmapRandom(scatterState) - 1 |
| 107 |
< |
: 1 / (2 * ray -> gecc) * |
| 108 |
< |
(1 + ray -> gecc * ray -> gecc - |
| 109 |
< |
(1 - ray -> gecc * ray -> gecc) / |
| 110 |
< |
(1 - ray -> gecc + 2 * ray -> gecc * |
| 111 |
< |
pmapRandom(scatterState))); |
| 112 |
< |
|
| 113 |
< |
cosPhi = cos(2 * PI * pmapRandom(scatterState)); |
| 114 |
< |
du = dv = sqrt(1 - cosTheta * cosTheta); /* sin(theta) */ |
| 115 |
< |
du *= cosPhi; |
| 116 |
< |
dv *= sqrt(1 - cosPhi * cosPhi); /* sin(phi) */ |
| 106 |
> |
xi1 = pmapRandom(scatterState); |
| 107 |
> |
cosTheta = ray -> gecc <= FTINY |
| 108 |
> |
? 2 * xi1 - 1 |
| 109 |
> |
: 0.5 / gecc * |
| 110 |
> |
(1 + gecc2 - sqr((1 - gecc2) / |
| 111 |
> |
(1 + gecc * (2 * xi1 - 1)))); |
| 112 |
> |
|
| 113 |
> |
phi = 2 * PI * pmapRandom(scatterState); |
| 114 |
> |
du = dv = sqrt(1 - sqr(cosTheta)); /* sin(theta) */ |
| 115 |
> |
du *= cos(phi); |
| 116 |
> |
dv *= sin(phi); |
| 117 |
|
|
| 118 |
|
/* Get axes u & v perpendicular to photon direction */ |
| 119 |
|
i = 0; |
| 127 |
|
for (i = 0; i < 3; i++) |
| 128 |
|
ray -> rdir [i] = du * u [i] + dv * v [i] + |
| 129 |
|
cosTheta * ray -> rdir [i]; |
| 130 |
+ |
|
| 131 |
|
ray -> rlvl++; |
| 132 |
|
ray -> rmax = -log(pmapRandom(mediumState)) / cext; |
| 133 |
|
} |
| 134 |
< |
|
| 134 |
> |
|
| 135 |
> |
/* Passed through medium until intersecting local object */ |
| 136 |
|
setcolor(cvext, exp(-ray -> rot * ray -> cext [0]), |
| 137 |
|
exp(-ray -> rot * ray -> cext [1]), |
| 138 |
|
exp(-ray -> rot * ray -> cext [2])); |
| 139 |
|
|
| 140 |
|
/* Modify ray color and normalise */ |
| 141 |
|
multcolor(ray -> rcol, cvext); |
| 142 |
< |
colorNorm(ray -> rcol); |
| 143 |
< |
|
| 120 |
< |
/* Passed through medium */ |
| 142 |
> |
colorNorm(ray -> rcol); |
| 143 |
> |
|
| 144 |
|
return 1; |
| 145 |
|
} |
| 146 |
|
|
| 150 |
|
/* Follow photon as it bounces around... */ |
| 151 |
|
{ |
| 152 |
|
long mod; |
| 153 |
< |
OBJREC* mat; |
| 153 |
> |
OBJREC *mat, *port = NULL; |
| 154 |
> |
|
| 155 |
> |
if (!ray -> parent) { |
| 156 |
> |
/* !!! PHOTON PORT REJECTION SAMPLING HACK: get photon port for |
| 157 |
> |
* !!! primary ray from ray -> ro, then reset the latter to NULL so |
| 158 |
> |
* !!! as not to interfere with localhit() */ |
| 159 |
> |
port = ray -> ro; |
| 160 |
> |
ray -> ro = NULL; |
| 161 |
> |
} |
| 162 |
|
|
| 163 |
|
if (ray -> rlvl > photonMaxBounce) { |
| 164 |
|
#ifdef PMAP_RUNAWAY_WARN |
| 169 |
|
|
| 170 |
|
if (colorAvg(ray -> cext) > FTINY && !photonParticipate(ray)) |
| 171 |
|
return; |
| 172 |
< |
|
| 172 |
> |
|
| 173 |
|
if (localhit(ray, &thescene)) { |
| 174 |
|
mod = ray -> ro -> omod; |
| 175 |
< |
|
| 175 |
> |
|
| 176 |
> |
/* XXX: Is port -> omod != mod sufficient here? Probably not... */ |
| 177 |
> |
if ( |
| 178 |
> |
port && ray -> ro != port && |
| 179 |
> |
findmaterial(port) != findmaterial(ray -> ro) |
| 180 |
> |
) { |
| 181 |
> |
/* !!! PHOTON PORT REJECTION SAMPLING HACK !!! |
| 182 |
> |
* Terminate photon if emitted from port without intersecting it or |
| 183 |
> |
* its other associated surfaces or same material. |
| 184 |
> |
* This can happen when the port's partitions extend beyond its |
| 185 |
> |
* actual geometry, e.g. with polygons. Since the total flux |
| 186 |
> |
* relayed by the port is based on the (in this case) larger |
| 187 |
> |
* partition area, it is overestimated; terminating these photons |
| 188 |
> |
* constitutes rejection sampling and thereby compensates any bias |
| 189 |
> |
* incurred by the overestimated flux. */ |
| 190 |
> |
#ifdef PMAP_PORTREJECT_WARN |
| 191 |
> |
sprintf(errmsg, "photon outside port %s", ray -> ro -> oname); |
| 192 |
> |
error(WARNING, errmsg); |
| 193 |
> |
#endif |
| 194 |
> |
return; |
| 195 |
> |
} |
| 196 |
> |
|
| 197 |
|
if ((ray -> clipset && inset(ray -> clipset, mod)) || mod == OVOID) { |
| 198 |
|
/* Transfer ray if modifier is VOID or clipped within antimatta */ |
| 199 |
|
RAY tray; |
| 225 |
|
|
| 226 |
|
repComplete = numPreComp = finalGather * pmap -> numPhotons; |
| 227 |
|
|
| 228 |
< |
if (photonRepTime) { |
| 229 |
< |
sprintf(errmsg, "Precomputing irradiance for %ld global photons...\n", |
| 228 |
> |
if (verbose) { |
| 229 |
> |
sprintf(errmsg, |
| 230 |
> |
"\nPrecomputing irradiance for %ld global photons\n", |
| 231 |
|
numPreComp); |
| 232 |
|
eputs(errmsg); |
| 233 |
+ |
#if NIX |
| 234 |
|
fflush(stderr); |
| 235 |
+ |
#endif |
| 236 |
|
} |
| 237 |
|
|
| 238 |
|
/* Copy photon map for precomputed photons */ |
| 259 |
|
|
| 260 |
|
for (i = 0; i < numPreComp; i++) { |
| 261 |
|
/* Get random photon from stratified distribution in source heap to |
| 262 |
< |
* avoid duplicates and clutering */ |
| 262 |
> |
* avoid duplicates and clustering */ |
| 263 |
|
pIdx = firstPhoton(pmap) + |
| 264 |
|
(unsigned long)((i + pmapRandom(pmap -> randState)) / |
| 265 |
|
finalGather); |
| 297 |
|
deletePhotons(pmap); |
| 298 |
|
memcpy(pmap, &nuPmap, sizeof(PhotonMap)); |
| 299 |
|
|
| 300 |
< |
if (photonRepTime) { |
| 301 |
< |
eputs("Rebuilding precomputed photon map...\n"); |
| 300 |
> |
if (verbose) { |
| 301 |
> |
eputs("\nRebuilding precomputed photon map\n"); |
| 302 |
> |
#if NIX |
| 303 |
|
fflush(stderr); |
| 304 |
+ |
#endif |
| 305 |
|
} |
| 306 |
|
|
| 307 |
|
/* Rebuild underlying data structure, destroying heap */ |
| 320 |
|
void distribPhotons (PhotonMap **pmaps, unsigned numProc) |
| 321 |
|
{ |
| 322 |
|
EmissionMap emap; |
| 323 |
< |
char errmsg2 [128], shmFname [255]; |
| 323 |
> |
char errmsg2 [128], shmFname [PMAP_TMPFNLEN]; |
| 324 |
|
unsigned t, srcIdx, proc; |
| 325 |
|
double totalFlux = 0; |
| 326 |
|
int shmFile, stat, pid; |
| 352 |
|
initPhotonHeap(pmaps [t]); |
| 353 |
|
/* Per-subprocess target count */ |
| 354 |
|
pmaps [t] -> distribTarget /= numProc; |
| 355 |
+ |
|
| 356 |
+ |
if (!pmaps [t] -> distribTarget) |
| 357 |
+ |
error(INTERNAL, "no photons to distribute in distribPhotons"); |
| 358 |
|
} |
| 359 |
|
|
| 360 |
|
initPhotonEmissionFuncs(); |
| 361 |
|
initPhotonScatterFuncs(); |
| 362 |
|
|
| 363 |
< |
/* Get photon ports if specified */ |
| 364 |
< |
if (ambincl == 1) |
| 305 |
< |
getPhotonPorts(); |
| 363 |
> |
/* Get photon ports from modifier list */ |
| 364 |
> |
getPhotonPorts(photonPortList); |
| 365 |
|
|
| 366 |
|
/* Get photon sensor modifiers */ |
| 367 |
|
getPhotonSensors(photonSensorList); |
| 368 |
|
|
| 369 |
+ |
#if NIX |
| 370 |
|
/* Set up shared mem for photon counters (zeroed by ftruncate) */ |
| 371 |
< |
#if 0 |
| 312 |
< |
snprintf(shmFname, 255, PMAP_SHMFNAME, getpid()); |
| 313 |
< |
shmFile = shm_open(shmFname, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR); |
| 314 |
< |
#else |
| 315 |
< |
strcpy(shmFname, PMAP_SHMFNAME); |
| 371 |
> |
strcpy(shmFname, PMAP_TMPFNAME); |
| 372 |
|
shmFile = mkstemp(shmFname); |
| 317 |
– |
#endif |
| 373 |
|
|
| 374 |
< |
if (shmFile < 0) |
| 375 |
< |
error(SYSTEM, "failed opening shared memory file in distribPhotons"); |
| 374 |
> |
if (shmFile < 0 || ftruncate(shmFile, sizeof(*photonCnt)) < 0) |
| 375 |
> |
error(SYSTEM, "failed shared mem init in distribPhotons"); |
| 376 |
|
|
| 322 |
– |
if (ftruncate(shmFile, sizeof(*photonCnt)) < 0) |
| 323 |
– |
error(SYSTEM, "failed setting shared memory size in distribPhotons"); |
| 324 |
– |
|
| 377 |
|
photonCnt = mmap(NULL, sizeof(*photonCnt), PROT_READ | PROT_WRITE, |
| 378 |
|
MAP_SHARED, shmFile, 0); |
| 379 |
|
|
| 380 |
|
if (photonCnt == MAP_FAILED) |
| 381 |
< |
error(SYSTEM, "failed mapping shared memory in distribPhotons"); |
| 381 |
> |
error(SYSTEM, "failed mapping shared memory in distribPhotons"); |
| 382 |
> |
#else |
| 383 |
> |
/* Allocate photon counters statically on Windoze */ |
| 384 |
> |
if (!(photonCnt = malloc(sizeof(PhotonCnt)))) |
| 385 |
> |
error(SYSTEM, "failed trivial malloc in distribPhotons"); |
| 386 |
> |
photonCnt -> numEmitted = photonCnt -> numComplete = 0; |
| 387 |
> |
#endif /* NIX */ |
| 388 |
|
|
| 389 |
< |
if (photonRepTime) |
| 390 |
< |
eputs("\n"); |
| 389 |
> |
if (verbose) { |
| 390 |
> |
sprintf(errmsg, "\nIntegrating flux from %d sources", nsources); |
| 391 |
> |
|
| 392 |
> |
if (photonPorts) { |
| 393 |
> |
sprintf(errmsg2, " via %d ports", numPhotonPorts); |
| 394 |
> |
strcat(errmsg, errmsg2); |
| 395 |
> |
} |
| 396 |
> |
|
| 397 |
> |
strcat(errmsg, "\n"); |
| 398 |
> |
eputs(errmsg); |
| 399 |
> |
} |
| 400 |
|
|
| 401 |
|
/* =================================================================== |
| 402 |
|
* FLUX INTEGRATION - Get total photon flux from light sources |
| 410 |
|
: NULL; |
| 411 |
|
photonPartition [emap.src -> so -> otype] (&emap); |
| 412 |
|
|
| 413 |
< |
if (photonRepTime) { |
| 414 |
< |
sprintf(errmsg, "Integrating flux from source %s ", |
| 413 |
> |
if (verbose) { |
| 414 |
> |
sprintf(errmsg, "\tIntegrating flux from source %s ", |
| 415 |
|
source [srcIdx].so -> oname); |
| 416 |
< |
|
| 416 |
> |
|
| 417 |
|
if (emap.port) { |
| 418 |
|
sprintf(errmsg2, "via port %s ", |
| 419 |
|
photonPorts [portCnt].so -> oname); |
| 420 |
|
strcat(errmsg, errmsg2); |
| 421 |
|
} |
| 422 |
< |
|
| 423 |
< |
sprintf(errmsg2, "(%lu partitions)...\n", emap.numPartitions); |
| 422 |
> |
|
| 423 |
> |
sprintf(errmsg2, "(%lu partitions)\n", emap.numPartitions); |
| 424 |
|
strcat(errmsg, errmsg2); |
| 425 |
|
eputs(errmsg); |
| 426 |
+ |
#if NIX |
| 427 |
|
fflush(stderr); |
| 428 |
+ |
#endif |
| 429 |
|
} |
| 430 |
|
|
| 431 |
|
for (emap.partitionCnt = 0; emap.partitionCnt < emap.numPartitions; |
| 440 |
|
|
| 441 |
|
if (totalFlux < FTINY) |
| 442 |
|
error(USER, "zero flux from light sources"); |
| 443 |
+ |
|
| 444 |
+ |
/* Record start time for progress reports */ |
| 445 |
+ |
repStartTime = time(NULL); |
| 446 |
|
|
| 447 |
+ |
if (verbose) { |
| 448 |
+ |
sprintf(errmsg, "\nPhoton distribution @ %d procs\n", numProc); |
| 449 |
+ |
eputs(errmsg); |
| 450 |
+ |
} |
| 451 |
+ |
|
| 452 |
|
/* MAIN LOOP */ |
| 453 |
|
for (proc = 0; proc < numProc; proc++) { |
| 454 |
+ |
#if NIX |
| 455 |
|
if (!(pid = fork())) { |
| 456 |
< |
/* SUBPROCESS ENTERS HERE. |
| 457 |
< |
All opened and memory mapped files are inherited */ |
| 456 |
> |
/* SUBPROCESS ENTERS HERE; open and mmapped files inherited */ |
| 457 |
> |
#else |
| 458 |
> |
if (1) { |
| 459 |
> |
/* No subprocess under Windoze */ |
| 460 |
> |
#endif |
| 461 |
> |
/* Local photon counters for this subprocess */ |
| 462 |
|
unsigned passCnt = 0, prePassCnt = 0; |
| 463 |
|
unsigned long lastNumPhotons [NUM_PMAP_TYPES]; |
| 464 |
|
unsigned long localNumEmitted = 0; /* Num photons emitted by this |
| 466 |
|
|
| 467 |
|
/* Seed RNGs from PID for decorellated photon distribution */ |
| 468 |
|
pmapSeed(randSeed + proc, partState); |
| 469 |
< |
pmapSeed(randSeed + proc, emitState); |
| 470 |
< |
pmapSeed(randSeed + proc, cntState); |
| 471 |
< |
pmapSeed(randSeed + proc, mediumState); |
| 472 |
< |
pmapSeed(randSeed + proc, scatterState); |
| 473 |
< |
pmapSeed(randSeed + proc, rouletteState); |
| 474 |
< |
|
| 469 |
> |
pmapSeed(randSeed + (proc + 1) % numProc, emitState); |
| 470 |
> |
pmapSeed(randSeed + (proc + 2) % numProc, cntState); |
| 471 |
> |
pmapSeed(randSeed + (proc + 3) % numProc, mediumState); |
| 472 |
> |
pmapSeed(randSeed + (proc + 4) % numProc, scatterState); |
| 473 |
> |
pmapSeed(randSeed + (proc + 5) % numProc, rouletteState); |
| 474 |
> |
|
| 475 |
> |
#ifdef DEBUG_PMAP |
| 476 |
> |
/* Output child process PID after random delay to prevent corrupted |
| 477 |
> |
* console output due to race condition */ |
| 478 |
> |
usleep(1e6 * pmapRandom(rouletteState)); |
| 479 |
> |
fprintf(stderr, "Proc %d: PID = %d " |
| 480 |
> |
"(waiting 10 sec to attach debugger...)\n", |
| 481 |
> |
proc, getpid()); |
| 482 |
> |
/* Allow time for debugger to attach to child process */ |
| 483 |
> |
sleep(10); |
| 484 |
> |
#endif |
| 485 |
> |
|
| 486 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 487 |
|
lastNumPhotons [t] = 0; |
| 488 |
|
|
| 502 |
|
* iterations; make it clear to user which photon maps are |
| 503 |
|
* missing so (s)he can check geometry and materials */ |
| 504 |
|
if (++prePassCnt > maxPreDistrib) { |
| 505 |
< |
sprintf(errmsg, |
| 413 |
< |
"proc %d, source %s: too many prepasses", |
| 414 |
< |
proc, source [srcIdx].so -> oname); |
| 505 |
> |
sprintf(errmsg, "proc %d: too many prepasses", proc); |
| 506 |
|
|
| 507 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 508 |
|
if (pmaps [t] && !pmaps [t] -> numPhotons) { |
| 574 |
|
break; |
| 575 |
|
} |
| 576 |
|
|
| 577 |
< |
/* Update shared completion counter for prog.report by parent */ |
| 577 |
> |
/* Update shared completion counter for progreport by parent */ |
| 578 |
|
photonCnt -> numComplete += numEmit; |
| 579 |
|
|
| 580 |
|
/* PHOTON DISTRIBUTION LOOP */ |
| 587 |
|
? photonPorts + portCnt : NULL; |
| 588 |
|
photonPartition [emap.src -> so -> otype] (&emap); |
| 589 |
|
|
| 590 |
< |
if (photonRepTime && !proc) { |
| 590 |
> |
if (verbose && !proc) { |
| 591 |
> |
/* Output from subproc 0 only to avoid race condition |
| 592 |
> |
* on console I/O */ |
| 593 |
|
if (!passCnt) |
| 594 |
< |
sprintf(errmsg, "PREPASS %d on source %s ", |
| 594 |
> |
sprintf(errmsg, "\tPREPASS %d on source %s ", |
| 595 |
|
prePassCnt, source [srcIdx].so -> oname); |
| 596 |
|
else |
| 597 |
< |
sprintf(errmsg, "MAIN PASS on source %s ", |
| 597 |
> |
sprintf(errmsg, "\tMAIN PASS on source %s ", |
| 598 |
|
source [srcIdx].so -> oname); |
| 599 |
< |
|
| 599 |
> |
|
| 600 |
|
if (emap.port) { |
| 601 |
|
sprintf(errmsg2, "via port %s ", |
| 602 |
|
photonPorts [portCnt].so -> oname); |
| 603 |
|
strcat(errmsg, errmsg2); |
| 604 |
|
} |
| 605 |
< |
|
| 605 |
> |
|
| 606 |
|
sprintf(errmsg2, "(%lu partitions)\n", |
| 607 |
|
emap.numPartitions); |
| 608 |
|
strcat(errmsg, errmsg2); |
| 609 |
|
eputs(errmsg); |
| 610 |
+ |
#if NIX |
| 611 |
|
fflush(stderr); |
| 612 |
+ |
#endif |
| 613 |
|
} |
| 614 |
|
|
| 615 |
|
for (emap.partitionCnt = 0; emap.partitionCnt < emap.numPartitions; |
| 624 |
|
|
| 625 |
|
/* Number of photons to emit from ziss partishunn -- |
| 626 |
|
* proportional to flux; photon ray weight and scalar |
| 627 |
< |
* flux are uniform (the latter only varying in RGB). |
| 533 |
< |
* */ |
| 627 |
> |
* flux are uniform (latter only varying in RGB). */ |
| 628 |
|
partNumEmit = numEmit * colorAvg(emap.partFlux) / |
| 629 |
|
totalFlux; |
| 630 |
|
partEmitCnt = (unsigned long)partNumEmit; |
| 645 |
|
/* Emit photon based on PDF and trace through scene |
| 646 |
|
* until absorbed/leaked */ |
| 647 |
|
emitPhoton(&emap, &photonRay); |
| 648 |
+ |
#if 1 |
| 649 |
+ |
if (emap.port) |
| 650 |
+ |
/* !!! PHOTON PORT REJECTION SAMPLING HACK: set |
| 651 |
+ |
* !!! photon port as fake hit object for |
| 652 |
+ |
* !!! primary ray to check for intersection in |
| 653 |
+ |
* !!! tracePhoton() */ |
| 654 |
+ |
photonRay.ro = emap.port -> so; |
| 655 |
+ |
#endif |
| 656 |
|
tracePhoton(&photonRay); |
| 657 |
|
} |
| 658 |
< |
|
| 658 |
> |
|
| 659 |
|
/* Update shared global photon count for each pmap */ |
| 660 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 661 |
|
if (pmaps [t]) { |
| 663 |
|
pmaps [t] -> numPhotons - lastNumPhotons [t]; |
| 664 |
|
lastNumPhotons [t] = pmaps [t] -> numPhotons; |
| 665 |
|
} |
| 666 |
+ |
#if !NIX |
| 667 |
+ |
/* Synchronous progress report on Windoze */ |
| 668 |
+ |
if (!proc && photonRepTime > 0 && |
| 669 |
+ |
time(NULL) >= repLastTime + photonRepTime) { |
| 670 |
+ |
repEmitted = repProgress = photonCnt -> numEmitted; |
| 671 |
+ |
repComplete = photonCnt -> numComplete; |
| 672 |
+ |
pmapDistribReport(); |
| 673 |
+ |
} |
| 674 |
+ |
#endif |
| 675 |
|
} |
| 676 |
|
|
| 677 |
|
portCnt++; |
| 687 |
|
break; |
| 688 |
|
} |
| 689 |
|
|
| 690 |
< |
if (t >= NUM_PMAP_TYPES) { |
| 690 |
> |
if (t >= NUM_PMAP_TYPES) |
| 691 |
|
/* No empty photon maps found; now do pass 2 */ |
| 692 |
|
passCnt++; |
| 582 |
– |
#if 0 |
| 583 |
– |
if (photonRepTime) |
| 584 |
– |
eputs("\n"); |
| 585 |
– |
#endif |
| 586 |
– |
} |
| 693 |
|
} while (passCnt < 2); |
| 694 |
|
|
| 695 |
< |
/* Unmap shared photon counters */ |
| 696 |
< |
#if 0 |
| 591 |
< |
munmap(photonCnt, sizeof(*photonCnt)); |
| 592 |
< |
close(shmFile); |
| 593 |
< |
#endif |
| 594 |
< |
|
| 595 |
< |
/* Flush heap buffa for every pmap one final time; this is required |
| 596 |
< |
* to prevent data corruption! */ |
| 695 |
> |
/* Flush heap buffa for every pmap one final time; |
| 696 |
> |
* avoids potential data corruption! */ |
| 697 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 698 |
|
if (pmaps [t]) { |
| 599 |
– |
#if 0 |
| 600 |
– |
eputs("Final flush\n"); |
| 601 |
– |
#endif |
| 699 |
|
flushPhotonHeap(pmaps [t]); |
| 700 |
< |
fclose(pmaps [t] -> heap); |
| 700 |
> |
/* Heap file closed automatically on exit |
| 701 |
> |
fclose(pmaps [t] -> heap); */ |
| 702 |
|
#ifdef DEBUG_PMAP |
| 703 |
< |
sprintf(errmsg, "Proc %d: total %ld photons\n", getpid(), |
| 703 |
> |
sprintf(errmsg, "Proc %d: total %ld photons\n", proc, |
| 704 |
|
pmaps [t] -> numPhotons); |
| 705 |
|
eputs(errmsg); |
| 706 |
|
#endif |
| 707 |
|
} |
| 708 |
< |
|
| 708 |
> |
#if NIX |
| 709 |
> |
/* Terminate subprocess */ |
| 710 |
|
exit(0); |
| 711 |
+ |
#endif |
| 712 |
|
} |
| 713 |
|
else if (pid < 0) |
| 714 |
|
error(SYSTEM, "failed to fork subprocess in distribPhotons"); |
| 715 |
|
} |
| 716 |
|
|
| 717 |
+ |
#if NIX |
| 718 |
|
/* PARENT PROCESS CONTINUES HERE */ |
| 618 |
– |
/* Record start time and enable progress report signal handler */ |
| 619 |
– |
repStartTime = time(NULL); |
| 719 |
|
#ifdef SIGCONT |
| 720 |
+ |
/* Enable progress report signal handler */ |
| 721 |
|
signal(SIGCONT, pmapDistribReport); |
| 722 |
< |
#endif |
| 723 |
< |
|
| 624 |
< |
if (photonRepTime) |
| 625 |
< |
eputs("\n"); |
| 626 |
< |
|
| 627 |
< |
/* Wait for subprocesses to complete while reporting progress */ |
| 722 |
> |
#endif |
| 723 |
> |
/* Wait for subprocesses complete while reporting progress */ |
| 724 |
|
proc = numProc; |
| 725 |
|
while (proc) { |
| 726 |
|
while (waitpid(-1, &stat, WNOHANG) > 0) { |
| 733 |
|
|
| 734 |
|
/* Nod off for a bit and update progress */ |
| 735 |
|
sleep(1); |
| 736 |
< |
/* Update progress report from shared subprocess counters */ |
| 736 |
> |
|
| 737 |
> |
/* Asynchronous progress report from shared subprocess counters */ |
| 738 |
|
repEmitted = repProgress = photonCnt -> numEmitted; |
| 739 |
< |
repComplete = photonCnt -> numComplete; |
| 739 |
> |
repComplete = photonCnt -> numComplete; |
| 740 |
|
|
| 741 |
+ |
repProgress = repComplete = 0; |
| 742 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 743 |
|
if ((pm = pmaps [t])) { |
| 646 |
– |
#if 0 |
| 647 |
– |
/* Get photon count from heapfile size for progress update */ |
| 648 |
– |
fseek(pm -> heap, 0, SEEK_END); |
| 649 |
– |
pm -> numPhotons = ftell(pm -> heap) / sizeof(Photon); */ |
| 650 |
– |
#else |
| 744 |
|
/* Get global photon count from shmem updated by subprocs */ |
| 745 |
< |
pm -> numPhotons = photonCnt -> numPhotons [t]; |
| 746 |
< |
#endif |
| 745 |
> |
repProgress += pm -> numPhotons = photonCnt -> numPhotons [t]; |
| 746 |
> |
repComplete += pm -> distribTarget; |
| 747 |
|
} |
| 748 |
+ |
repComplete *= numProc; |
| 749 |
|
|
| 750 |
|
if (photonRepTime > 0 && time(NULL) >= repLastTime + photonRepTime) |
| 751 |
|
pmapDistribReport(); |
| 753 |
|
else signal(SIGCONT, pmapDistribReport); |
| 754 |
|
#endif |
| 755 |
|
} |
| 756 |
+ |
#endif /* NIX */ |
| 757 |
|
|
| 758 |
|
/* =================================================================== |
| 759 |
|
* POST-DISTRIBUTION - Set photon flux and build data struct for photon |
| 760 |
|
* storage, etc. |
| 761 |
|
* =================================================================== */ |
| 762 |
|
#ifdef SIGCONT |
| 763 |
+ |
/* Reset signal handler */ |
| 764 |
|
signal(SIGCONT, SIG_DFL); |
| 765 |
|
#endif |
| 766 |
|
free(emap.samples); |
| 767 |
|
|
| 768 |
< |
/* Set photon flux (repProgress is total num emitted) */ |
| 768 |
> |
/* Set photon flux */ |
| 769 |
|
totalFlux /= photonCnt -> numEmitted; |
| 770 |
< |
|
| 770 |
> |
#if NIX |
| 771 |
|
/* Photon counters no longer needed, unmap shared memory */ |
| 772 |
|
munmap(photonCnt, sizeof(*photonCnt)); |
| 773 |
|
close(shmFile); |
| 678 |
– |
#if 0 |
| 679 |
– |
shm_unlink(shmFname); |
| 680 |
– |
#else |
| 774 |
|
unlink(shmFname); |
| 775 |
+ |
#else |
| 776 |
+ |
free(photonCnt); |
| 777 |
|
#endif |
| 778 |
< |
|
| 778 |
> |
if (verbose) |
| 779 |
> |
eputs("\n"); |
| 780 |
> |
|
| 781 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 782 |
|
if (pmaps [t]) { |
| 783 |
< |
if (photonRepTime) { |
| 784 |
< |
sprintf(errmsg, "\nBuilding %s photon map...\n", pmapName [t]); |
| 783 |
> |
if (verbose) { |
| 784 |
> |
sprintf(errmsg, "Building %s photon map\n", pmapName [t]); |
| 785 |
|
eputs(errmsg); |
| 786 |
+ |
#if NIX |
| 787 |
|
fflush(stderr); |
| 788 |
+ |
#endif |
| 789 |
|
} |
| 790 |
|
|
| 791 |
|
/* Build underlying data structure; heap is destroyed */ |
| 792 |
|
buildPhotonMap(pmaps [t], &totalFlux, NULL, numProc); |
| 793 |
|
} |
| 794 |
< |
|
| 794 |
> |
|
| 795 |
|
/* Precompute photon irradiance if necessary */ |
| 796 |
< |
if (preCompPmap) |
| 796 |
> |
if (preCompPmap) { |
| 797 |
> |
if (verbose) |
| 798 |
> |
eputs("\n"); |
| 799 |
|
preComputeGlobal(preCompPmap); |
| 800 |
+ |
} |
| 801 |
+ |
|
| 802 |
+ |
if (verbose) |
| 803 |
+ |
eputs("\n"); |
| 804 |
|
} |
