| 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, |
| 50 |
|
or 0 if absorbed and $*%&ed. Analogon to rayparticipate(). */ |
| 51 |
|
{ |
| 52 |
|
int i; |
| 53 |
< |
RREAL cosTheta, cosPhi, du, dv; |
| 53 |
> |
RREAL xi1, cosTheta, phi, du, dv; |
| 54 |
|
const float cext = colorAvg(ray -> cext), |
| 55 |
< |
albedo = colorAvg(ray -> albedo); |
| 55 |
> |
albedo = colorAvg(ray -> albedo), |
| 56 |
> |
gecc = ray -> gecc, gecc2 = sqr(gecc); |
| 57 |
|
FVECT u, v; |
| 58 |
|
COLOR cvext; |
| 59 |
|
|
| 61 |
|
ray -> rmax = -log(pmapRandom(mediumState)) / cext; |
| 62 |
|
|
| 63 |
|
while (!localhit(ray, &thescene)) { |
| 64 |
+ |
if (!incube(&thescene, ray -> rop)) { |
| 65 |
+ |
/* Terminate photon if it has leaked from the scene */ |
| 66 |
+ |
#ifdef DEBUG_PMAP |
| 67 |
+ |
fprintf(stderr, |
| 68 |
+ |
"Volume photon leaked from scene at [%.3f %.3f %.3f]\n", |
| 69 |
+ |
ray -> rop [0], ray -> rop [1], ray -> rop [2]); |
| 70 |
+ |
#endif |
| 71 |
+ |
return 0; |
| 72 |
+ |
} |
| 73 |
+ |
|
| 74 |
|
setcolor(cvext, exp(-ray -> rmax * ray -> cext [0]), |
| 75 |
|
exp(-ray -> rmax * ray -> cext [1]), |
| 76 |
|
exp(-ray -> rmax * ray -> cext [2])); |
| 80 |
|
colorNorm(ray -> rcol); |
| 81 |
|
VCOPY(ray -> rorg, ray -> rop); |
| 82 |
|
|
| 83 |
+ |
#if 0 |
| 84 |
|
if (albedo > FTINY && ray -> rlvl > 0) |
| 85 |
+ |
#else |
| 86 |
+ |
/* Store volume photons unconditionally in mist to also account for |
| 87 |
+ |
direct inscattering from sources */ |
| 88 |
+ |
if (albedo > FTINY) |
| 89 |
+ |
#endif |
| 90 |
|
/* Add to volume photon map */ |
| 91 |
|
newPhoton(volumePmap, ray); |
| 92 |
|
|
| 99 |
|
scalecolor(ray -> rcol, 1 / albedo); |
| 100 |
|
|
| 101 |
|
/* Scatter photon */ |
| 102 |
< |
cosTheta = ray -> gecc <= FTINY ? 2 * pmapRandom(scatterState) - 1 |
| 103 |
< |
: 1 / (2 * ray -> gecc) * |
| 104 |
< |
(1 + ray -> gecc * ray -> gecc - |
| 105 |
< |
(1 - ray -> gecc * ray -> gecc) / |
| 106 |
< |
(1 - ray -> gecc + 2 * ray -> gecc * |
| 107 |
< |
pmapRandom(scatterState))); |
| 108 |
< |
|
| 109 |
< |
cosPhi = cos(2 * PI * pmapRandom(scatterState)); |
| 110 |
< |
du = dv = sqrt(1 - cosTheta * cosTheta); /* sin(theta) */ |
| 111 |
< |
du *= cosPhi; |
| 112 |
< |
dv *= sqrt(1 - cosPhi * cosPhi); /* sin(phi) */ |
| 102 |
> |
xi1 = pmapRandom(scatterState); |
| 103 |
> |
cosTheta = ray -> gecc <= FTINY |
| 104 |
> |
? 2 * xi1 - 1 |
| 105 |
> |
: 0.5 / gecc * |
| 106 |
> |
(1 + gecc2 - sqr((1 - gecc2) / |
| 107 |
> |
(1 + gecc * (2 * xi1 - 1)))); |
| 108 |
> |
|
| 109 |
> |
phi = 2 * PI * pmapRandom(scatterState); |
| 110 |
> |
du = dv = sqrt(1 - sqr(cosTheta)); /* sin(theta) */ |
| 111 |
> |
du *= cos(phi); |
| 112 |
> |
dv *= sin(phi); |
| 113 |
|
|
| 114 |
|
/* Get axes u & v perpendicular to photon direction */ |
| 115 |
|
i = 0; |
| 123 |
|
for (i = 0; i < 3; i++) |
| 124 |
|
ray -> rdir [i] = du * u [i] + dv * v [i] + |
| 125 |
|
cosTheta * ray -> rdir [i]; |
| 126 |
+ |
|
| 127 |
|
ray -> rlvl++; |
| 128 |
|
ray -> rmax = -log(pmapRandom(mediumState)) / cext; |
| 129 |
|
} |
| 130 |
< |
|
| 130 |
> |
|
| 131 |
> |
/* Passed through medium until intersecting local object */ |
| 132 |
|
setcolor(cvext, exp(-ray -> rot * ray -> cext [0]), |
| 133 |
|
exp(-ray -> rot * ray -> cext [1]), |
| 134 |
|
exp(-ray -> rot * ray -> cext [2])); |
| 135 |
|
|
| 136 |
|
/* Modify ray color and normalise */ |
| 137 |
|
multcolor(ray -> rcol, cvext); |
| 138 |
< |
colorNorm(ray -> rcol); |
| 139 |
< |
|
| 202 |
< |
/* Passed through medium */ |
| 138 |
> |
colorNorm(ray -> rcol); |
| 139 |
> |
|
| 140 |
|
return 1; |
| 141 |
|
} |
| 142 |
|
|
| 146 |
|
/* Follow photon as it bounces around... */ |
| 147 |
|
{ |
| 148 |
|
long mod; |
| 149 |
< |
OBJREC* mat; |
| 149 |
> |
OBJREC *mat, *port = NULL; |
| 150 |
> |
|
| 151 |
> |
if (!ray -> parent) { |
| 152 |
> |
/* !!! PHOTON PORT REJECTION SAMPLING HACK: get photon port for |
| 153 |
> |
* !!! primary ray from ray -> ro, then reset the latter to NULL so |
| 154 |
> |
* !!! as not to interfere with localhit() */ |
| 155 |
> |
port = ray -> ro; |
| 156 |
> |
ray -> ro = NULL; |
| 157 |
> |
} |
| 158 |
|
|
| 159 |
|
if (ray -> rlvl > photonMaxBounce) { |
| 160 |
|
#ifdef PMAP_RUNAWAY_WARN |
| 165 |
|
|
| 166 |
|
if (colorAvg(ray -> cext) > FTINY && !photonParticipate(ray)) |
| 167 |
|
return; |
| 168 |
< |
|
| 168 |
> |
|
| 169 |
|
if (localhit(ray, &thescene)) { |
| 170 |
|
mod = ray -> ro -> omod; |
| 171 |
< |
|
| 171 |
> |
|
| 172 |
> |
if (port && ray -> ro != port) { |
| 173 |
> |
/* !!! PHOTON PORT REJECTION SAMPLING HACK !!! |
| 174 |
> |
* Terminate photon if emitted from port without intersecting it; |
| 175 |
> |
* this can happen when the port's partitions extend beyond its |
| 176 |
> |
* actual geometry, e.g. with polygons. Since the total flux |
| 177 |
> |
* relayed by the port is based on the (in this case) larger |
| 178 |
> |
* partition area, it is overestimated; terminating these photons |
| 179 |
> |
* constitutes rejection sampling and thereby compensates any bias |
| 180 |
> |
* incurred by the overestimated flux. */ |
| 181 |
> |
#ifdef PMAP_PORTREJECT_WARN |
| 182 |
> |
sprintf(errmsg, "photon outside port %s", ray -> ro -> oname); |
| 183 |
> |
error(WARNING, errmsg); |
| 184 |
> |
#endif |
| 185 |
> |
return; |
| 186 |
> |
} |
| 187 |
> |
|
| 188 |
|
if ((ray -> clipset && inset(ray -> clipset, mod)) || mod == OVOID) { |
| 189 |
|
/* Transfer ray if modifier is VOID or clipped within antimatta */ |
| 190 |
|
RAY tray; |
| 216 |
|
|
| 217 |
|
repComplete = numPreComp = finalGather * pmap -> numPhotons; |
| 218 |
|
|
| 219 |
< |
if (photonRepTime) { |
| 220 |
< |
sprintf(errmsg, "Precomputing irradiance for %ld global photons...\n", |
| 219 |
> |
if (verbose) { |
| 220 |
> |
sprintf(errmsg, |
| 221 |
> |
"\nPrecomputing irradiance for %ld global photons\n", |
| 222 |
|
numPreComp); |
| 223 |
|
eputs(errmsg); |
| 224 |
+ |
#if NIX |
| 225 |
|
fflush(stderr); |
| 226 |
+ |
#endif |
| 227 |
|
} |
| 228 |
|
|
| 229 |
|
/* Copy photon map for precomputed photons */ |
| 250 |
|
|
| 251 |
|
for (i = 0; i < numPreComp; i++) { |
| 252 |
|
/* Get random photon from stratified distribution in source heap to |
| 253 |
< |
* avoid duplicates and clutering */ |
| 253 |
> |
* avoid duplicates and clustering */ |
| 254 |
|
pIdx = firstPhoton(pmap) + |
| 255 |
|
(unsigned long)((i + pmapRandom(pmap -> randState)) / |
| 256 |
|
finalGather); |
| 288 |
|
deletePhotons(pmap); |
| 289 |
|
memcpy(pmap, &nuPmap, sizeof(PhotonMap)); |
| 290 |
|
|
| 291 |
< |
if (photonRepTime) { |
| 292 |
< |
eputs("Rebuilding precomputed photon map...\n"); |
| 291 |
> |
if (verbose) { |
| 292 |
> |
eputs("\nRebuilding precomputed photon map\n"); |
| 293 |
> |
#if NIX |
| 294 |
|
fflush(stderr); |
| 295 |
+ |
#endif |
| 296 |
|
} |
| 297 |
|
|
| 298 |
|
/* Rebuild underlying data structure, destroying heap */ |
| 311 |
|
void distribPhotons (PhotonMap **pmaps, unsigned numProc) |
| 312 |
|
{ |
| 313 |
|
EmissionMap emap; |
| 314 |
< |
char errmsg2 [128], shmFname [255]; |
| 314 |
> |
char errmsg2 [128], shmFname [PMAP_TMPFNLEN]; |
| 315 |
|
unsigned t, srcIdx, proc; |
| 316 |
|
double totalFlux = 0; |
| 317 |
|
int shmFile, stat, pid; |
| 343 |
|
initPhotonHeap(pmaps [t]); |
| 344 |
|
/* Per-subprocess target count */ |
| 345 |
|
pmaps [t] -> distribTarget /= numProc; |
| 346 |
+ |
|
| 347 |
+ |
if (!pmaps [t] -> distribTarget) |
| 348 |
+ |
error(INTERNAL, "no photons to distribute in distribPhotons"); |
| 349 |
|
} |
| 350 |
|
|
| 351 |
|
initPhotonEmissionFuncs(); |
| 352 |
|
initPhotonScatterFuncs(); |
| 353 |
|
|
| 354 |
< |
/* Get photon ports if specified */ |
| 355 |
< |
if (ambincl == 1) |
| 387 |
< |
getPhotonPorts(); |
| 354 |
> |
/* Get photon ports from modifier list */ |
| 355 |
> |
getPhotonPorts(photonPortList); |
| 356 |
|
|
| 357 |
|
/* Get photon sensor modifiers */ |
| 358 |
|
getPhotonSensors(photonSensorList); |
| 359 |
|
|
| 360 |
+ |
#if NIX |
| 361 |
|
/* Set up shared mem for photon counters (zeroed by ftruncate) */ |
| 362 |
< |
#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); |
| 362 |
> |
strcpy(shmFname, PMAP_TMPFNAME); |
| 363 |
|
shmFile = mkstemp(shmFname); |
| 399 |
– |
#endif |
| 364 |
|
|
| 365 |
< |
if (shmFile < 0) |
| 366 |
< |
error(SYSTEM, "failed opening shared memory file in distribPhotons"); |
| 365 |
> |
if (shmFile < 0 || ftruncate(shmFile, sizeof(*photonCnt)) < 0) |
| 366 |
> |
error(SYSTEM, "failed shared mem init in distribPhotons"); |
| 367 |
|
|
| 404 |
– |
if (ftruncate(shmFile, sizeof(*photonCnt)) < 0) |
| 405 |
– |
error(SYSTEM, "failed setting shared memory size in distribPhotons"); |
| 406 |
– |
|
| 368 |
|
photonCnt = mmap(NULL, sizeof(*photonCnt), PROT_READ | PROT_WRITE, |
| 369 |
|
MAP_SHARED, shmFile, 0); |
| 370 |
|
|
| 371 |
|
if (photonCnt == MAP_FAILED) |
| 372 |
< |
error(SYSTEM, "failed mapping shared memory in distribPhotons"); |
| 372 |
> |
error(SYSTEM, "failed mapping shared memory in distribPhotons"); |
| 373 |
> |
#else |
| 374 |
> |
/* Allocate photon counters statically on Windoze */ |
| 375 |
> |
if (!(photonCnt = malloc(sizeof(PhotonCnt)))) |
| 376 |
> |
error(SYSTEM, "failed trivial malloc in distribPhotons"); |
| 377 |
> |
photonCnt -> numEmitted = photonCnt -> numComplete = 0; |
| 378 |
> |
#endif /* NIX */ |
| 379 |
|
|
| 380 |
< |
if (photonRepTime) |
| 381 |
< |
eputs("\n"); |
| 380 |
> |
if (verbose) { |
| 381 |
> |
sprintf(errmsg, "\nIntegrating flux from %d sources", nsources); |
| 382 |
> |
|
| 383 |
> |
if (photonPorts) { |
| 384 |
> |
sprintf(errmsg2, " via %d ports", numPhotonPorts); |
| 385 |
> |
strcat(errmsg, errmsg2); |
| 386 |
> |
} |
| 387 |
> |
|
| 388 |
> |
strcat(errmsg, "\n"); |
| 389 |
> |
eputs(errmsg); |
| 390 |
> |
} |
| 391 |
|
|
| 392 |
|
/* =================================================================== |
| 393 |
|
* FLUX INTEGRATION - Get total photon flux from light sources |
| 401 |
|
: NULL; |
| 402 |
|
photonPartition [emap.src -> so -> otype] (&emap); |
| 403 |
|
|
| 404 |
< |
if (photonRepTime) { |
| 405 |
< |
sprintf(errmsg, "Integrating flux from source %s ", |
| 404 |
> |
if (verbose) { |
| 405 |
> |
sprintf(errmsg, "\tIntegrating flux from source %s ", |
| 406 |
|
source [srcIdx].so -> oname); |
| 407 |
< |
|
| 407 |
> |
|
| 408 |
|
if (emap.port) { |
| 409 |
|
sprintf(errmsg2, "via port %s ", |
| 410 |
|
photonPorts [portCnt].so -> oname); |
| 411 |
|
strcat(errmsg, errmsg2); |
| 412 |
|
} |
| 413 |
< |
|
| 414 |
< |
sprintf(errmsg2, "(%lu partitions)...\n", emap.numPartitions); |
| 413 |
> |
|
| 414 |
> |
sprintf(errmsg2, "(%lu partitions)\n", emap.numPartitions); |
| 415 |
|
strcat(errmsg, errmsg2); |
| 416 |
|
eputs(errmsg); |
| 417 |
+ |
#if NIX |
| 418 |
|
fflush(stderr); |
| 419 |
+ |
#endif |
| 420 |
|
} |
| 421 |
|
|
| 422 |
|
for (emap.partitionCnt = 0; emap.partitionCnt < emap.numPartitions; |
| 431 |
|
|
| 432 |
|
if (totalFlux < FTINY) |
| 433 |
|
error(USER, "zero flux from light sources"); |
| 434 |
+ |
|
| 435 |
+ |
/* Record start time for progress reports */ |
| 436 |
+ |
repStartTime = time(NULL); |
| 437 |
|
|
| 438 |
+ |
if (verbose) { |
| 439 |
+ |
sprintf(errmsg, "\nPhoton distribution @ %d procs\n", numProc); |
| 440 |
+ |
eputs(errmsg); |
| 441 |
+ |
} |
| 442 |
+ |
|
| 443 |
|
/* MAIN LOOP */ |
| 444 |
|
for (proc = 0; proc < numProc; proc++) { |
| 445 |
+ |
#if NIX |
| 446 |
|
if (!(pid = fork())) { |
| 447 |
< |
/* SUBPROCESS ENTERS HERE. |
| 448 |
< |
All opened and memory mapped files are inherited */ |
| 447 |
> |
/* SUBPROCESS ENTERS HERE; open and mmapped files inherited */ |
| 448 |
> |
#else |
| 449 |
> |
if (1) { |
| 450 |
> |
/* No subprocess under Windoze */ |
| 451 |
> |
#endif |
| 452 |
> |
/* Local photon counters for this subprocess */ |
| 453 |
|
unsigned passCnt = 0, prePassCnt = 0; |
| 454 |
|
unsigned long lastNumPhotons [NUM_PMAP_TYPES]; |
| 455 |
|
unsigned long localNumEmitted = 0; /* Num photons emitted by this |
| 457 |
|
|
| 458 |
|
/* Seed RNGs from PID for decorellated photon distribution */ |
| 459 |
|
pmapSeed(randSeed + proc, partState); |
| 460 |
< |
pmapSeed(randSeed + proc, emitState); |
| 461 |
< |
pmapSeed(randSeed + proc, cntState); |
| 462 |
< |
pmapSeed(randSeed + proc, mediumState); |
| 463 |
< |
pmapSeed(randSeed + proc, scatterState); |
| 464 |
< |
pmapSeed(randSeed + proc, rouletteState); |
| 465 |
< |
|
| 460 |
> |
pmapSeed(randSeed + (proc + 1) % numProc, emitState); |
| 461 |
> |
pmapSeed(randSeed + (proc + 2) % numProc, cntState); |
| 462 |
> |
pmapSeed(randSeed + (proc + 3) % numProc, mediumState); |
| 463 |
> |
pmapSeed(randSeed + (proc + 4) % numProc, scatterState); |
| 464 |
> |
pmapSeed(randSeed + (proc + 5) % numProc, rouletteState); |
| 465 |
> |
|
| 466 |
> |
#ifdef DEBUG_PMAP |
| 467 |
> |
/* Output child process PID after random delay to prevent corrupted |
| 468 |
> |
* console output due to race condition */ |
| 469 |
> |
usleep(1e6 * pmapRandom(rouletteState)); |
| 470 |
> |
fprintf(stderr, "Proc %d: PID = %d " |
| 471 |
> |
"(waiting 10 sec to attach debugger...)\n", |
| 472 |
> |
proc, getpid()); |
| 473 |
> |
/* Allow time for debugger to attach to child process */ |
| 474 |
> |
sleep(10); |
| 475 |
> |
#endif |
| 476 |
> |
|
| 477 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 478 |
|
lastNumPhotons [t] = 0; |
| 479 |
|
|
| 493 |
|
* iterations; make it clear to user which photon maps are |
| 494 |
|
* missing so (s)he can check geometry and materials */ |
| 495 |
|
if (++prePassCnt > maxPreDistrib) { |
| 496 |
< |
sprintf(errmsg, |
| 495 |
< |
"proc %d, source %s: too many prepasses", |
| 496 |
< |
proc, source [srcIdx].so -> oname); |
| 496 |
> |
sprintf(errmsg, "proc %d: too many prepasses", proc); |
| 497 |
|
|
| 498 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 499 |
|
if (pmaps [t] && !pmaps [t] -> numPhotons) { |
| 565 |
|
break; |
| 566 |
|
} |
| 567 |
|
|
| 568 |
< |
/* Update shared completion counter for prog.report by parent */ |
| 568 |
> |
/* Update shared completion counter for progreport by parent */ |
| 569 |
|
photonCnt -> numComplete += numEmit; |
| 570 |
|
|
| 571 |
|
/* PHOTON DISTRIBUTION LOOP */ |
| 578 |
|
? photonPorts + portCnt : NULL; |
| 579 |
|
photonPartition [emap.src -> so -> otype] (&emap); |
| 580 |
|
|
| 581 |
< |
if (photonRepTime && !proc) { |
| 581 |
> |
if (verbose && !proc) { |
| 582 |
> |
/* Output from subproc 0 only to avoid race condition |
| 583 |
> |
* on console I/O */ |
| 584 |
|
if (!passCnt) |
| 585 |
< |
sprintf(errmsg, "PREPASS %d on source %s ", |
| 585 |
> |
sprintf(errmsg, "\tPREPASS %d on source %s ", |
| 586 |
|
prePassCnt, source [srcIdx].so -> oname); |
| 587 |
|
else |
| 588 |
< |
sprintf(errmsg, "MAIN PASS on source %s ", |
| 588 |
> |
sprintf(errmsg, "\tMAIN PASS on source %s ", |
| 589 |
|
source [srcIdx].so -> oname); |
| 590 |
< |
|
| 590 |
> |
|
| 591 |
|
if (emap.port) { |
| 592 |
|
sprintf(errmsg2, "via port %s ", |
| 593 |
|
photonPorts [portCnt].so -> oname); |
| 594 |
|
strcat(errmsg, errmsg2); |
| 595 |
|
} |
| 596 |
< |
|
| 596 |
> |
|
| 597 |
|
sprintf(errmsg2, "(%lu partitions)\n", |
| 598 |
|
emap.numPartitions); |
| 599 |
|
strcat(errmsg, errmsg2); |
| 600 |
|
eputs(errmsg); |
| 601 |
+ |
#if NIX |
| 602 |
|
fflush(stderr); |
| 603 |
+ |
#endif |
| 604 |
|
} |
| 605 |
|
|
| 606 |
|
for (emap.partitionCnt = 0; emap.partitionCnt < emap.numPartitions; |
| 615 |
|
|
| 616 |
|
/* Number of photons to emit from ziss partishunn -- |
| 617 |
|
* proportional to flux; photon ray weight and scalar |
| 618 |
< |
* flux are uniform (the latter only varying in RGB). |
| 615 |
< |
* */ |
| 618 |
> |
* flux are uniform (latter only varying in RGB). */ |
| 619 |
|
partNumEmit = numEmit * colorAvg(emap.partFlux) / |
| 620 |
|
totalFlux; |
| 621 |
|
partEmitCnt = (unsigned long)partNumEmit; |
| 636 |
|
/* Emit photon based on PDF and trace through scene |
| 637 |
|
* until absorbed/leaked */ |
| 638 |
|
emitPhoton(&emap, &photonRay); |
| 639 |
+ |
#if 1 |
| 640 |
+ |
if (emap.port) |
| 641 |
+ |
/* !!! PHOTON PORT REJECTION SAMPLING HACK: set |
| 642 |
+ |
* !!! photon port as fake hit object for |
| 643 |
+ |
* !!! primary ray to check for intersection in |
| 644 |
+ |
* !!! tracePhoton() */ |
| 645 |
+ |
photonRay.ro = emap.port -> so; |
| 646 |
+ |
#endif |
| 647 |
|
tracePhoton(&photonRay); |
| 648 |
|
} |
| 649 |
< |
|
| 649 |
> |
|
| 650 |
|
/* Update shared global photon count for each pmap */ |
| 651 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 652 |
|
if (pmaps [t]) { |
| 654 |
|
pmaps [t] -> numPhotons - lastNumPhotons [t]; |
| 655 |
|
lastNumPhotons [t] = pmaps [t] -> numPhotons; |
| 656 |
|
} |
| 657 |
+ |
#if !NIX |
| 658 |
+ |
/* Synchronous progress report on Windoze */ |
| 659 |
+ |
if (!proc && photonRepTime > 0 && |
| 660 |
+ |
time(NULL) >= repLastTime + photonRepTime) { |
| 661 |
+ |
repEmitted = repProgress = photonCnt -> numEmitted; |
| 662 |
+ |
repComplete = photonCnt -> numComplete; |
| 663 |
+ |
pmapDistribReport(); |
| 664 |
+ |
} |
| 665 |
+ |
#endif |
| 666 |
|
} |
| 667 |
|
|
| 668 |
|
portCnt++; |
| 678 |
|
break; |
| 679 |
|
} |
| 680 |
|
|
| 681 |
< |
if (t >= NUM_PMAP_TYPES) { |
| 681 |
> |
if (t >= NUM_PMAP_TYPES) |
| 682 |
|
/* No empty photon maps found; now do pass 2 */ |
| 683 |
|
passCnt++; |
| 664 |
– |
#if 0 |
| 665 |
– |
if (photonRepTime) |
| 666 |
– |
eputs("\n"); |
| 667 |
– |
#endif |
| 668 |
– |
} |
| 684 |
|
} while (passCnt < 2); |
| 685 |
|
|
| 686 |
< |
/* Unmap shared photon counters */ |
| 687 |
< |
#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! */ |
| 686 |
> |
/* Flush heap buffa for every pmap one final time; |
| 687 |
> |
* avoids potential data corruption! */ |
| 688 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 689 |
|
if (pmaps [t]) { |
| 681 |
– |
#if 0 |
| 682 |
– |
eputs("Final flush\n"); |
| 683 |
– |
#endif |
| 690 |
|
flushPhotonHeap(pmaps [t]); |
| 691 |
< |
fclose(pmaps [t] -> heap); |
| 691 |
> |
/* Heap file closed automatically on exit |
| 692 |
> |
fclose(pmaps [t] -> heap); */ |
| 693 |
|
#ifdef DEBUG_PMAP |
| 694 |
< |
sprintf(errmsg, "Proc %d: total %ld photons\n", getpid(), |
| 694 |
> |
sprintf(errmsg, "Proc %d: total %ld photons\n", proc, |
| 695 |
|
pmaps [t] -> numPhotons); |
| 696 |
|
eputs(errmsg); |
| 697 |
|
#endif |
| 698 |
|
} |
| 699 |
< |
|
| 699 |
> |
#if NIX |
| 700 |
> |
/* Terminate subprocess */ |
| 701 |
|
exit(0); |
| 702 |
+ |
#endif |
| 703 |
|
} |
| 704 |
|
else if (pid < 0) |
| 705 |
|
error(SYSTEM, "failed to fork subprocess in distribPhotons"); |
| 706 |
|
} |
| 707 |
|
|
| 708 |
+ |
#if NIX |
| 709 |
|
/* PARENT PROCESS CONTINUES HERE */ |
| 700 |
– |
/* Record start time and enable progress report signal handler */ |
| 701 |
– |
repStartTime = time(NULL); |
| 710 |
|
#ifdef SIGCONT |
| 711 |
+ |
/* Enable progress report signal handler */ |
| 712 |
|
signal(SIGCONT, pmapDistribReport); |
| 713 |
< |
#endif |
| 714 |
< |
|
| 706 |
< |
if (photonRepTime) |
| 707 |
< |
eputs("\n"); |
| 708 |
< |
|
| 709 |
< |
/* Wait for subprocesses to complete while reporting progress */ |
| 713 |
> |
#endif |
| 714 |
> |
/* Wait for subprocesses complete while reporting progress */ |
| 715 |
|
proc = numProc; |
| 716 |
|
while (proc) { |
| 717 |
|
while (waitpid(-1, &stat, WNOHANG) > 0) { |
| 724 |
|
|
| 725 |
|
/* Nod off for a bit and update progress */ |
| 726 |
|
sleep(1); |
| 727 |
< |
/* Update progress report from shared subprocess counters */ |
| 727 |
> |
|
| 728 |
> |
/* Asynchronous progress report from shared subprocess counters */ |
| 729 |
|
repEmitted = repProgress = photonCnt -> numEmitted; |
| 730 |
< |
repComplete = photonCnt -> numComplete; |
| 730 |
> |
repComplete = photonCnt -> numComplete; |
| 731 |
|
|
| 732 |
+ |
repProgress = repComplete = 0; |
| 733 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 734 |
|
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 |
| 735 |
|
/* Get global photon count from shmem updated by subprocs */ |
| 736 |
< |
pm -> numPhotons = photonCnt -> numPhotons [t]; |
| 737 |
< |
#endif |
| 736 |
> |
repProgress += pm -> numPhotons = photonCnt -> numPhotons [t]; |
| 737 |
> |
repComplete += pm -> distribTarget; |
| 738 |
|
} |
| 739 |
+ |
repComplete *= numProc; |
| 740 |
|
|
| 741 |
|
if (photonRepTime > 0 && time(NULL) >= repLastTime + photonRepTime) |
| 742 |
|
pmapDistribReport(); |
| 744 |
|
else signal(SIGCONT, pmapDistribReport); |
| 745 |
|
#endif |
| 746 |
|
} |
| 747 |
+ |
#endif /* NIX */ |
| 748 |
|
|
| 749 |
|
/* =================================================================== |
| 750 |
|
* POST-DISTRIBUTION - Set photon flux and build data struct for photon |
| 751 |
|
* storage, etc. |
| 752 |
|
* =================================================================== */ |
| 753 |
|
#ifdef SIGCONT |
| 754 |
+ |
/* Reset signal handler */ |
| 755 |
|
signal(SIGCONT, SIG_DFL); |
| 756 |
|
#endif |
| 757 |
|
free(emap.samples); |
| 758 |
|
|
| 759 |
< |
/* Set photon flux (repProgress is total num emitted) */ |
| 759 |
> |
/* Set photon flux */ |
| 760 |
|
totalFlux /= photonCnt -> numEmitted; |
| 761 |
< |
|
| 761 |
> |
#if NIX |
| 762 |
|
/* Photon counters no longer needed, unmap shared memory */ |
| 763 |
|
munmap(photonCnt, sizeof(*photonCnt)); |
| 764 |
|
close(shmFile); |
| 760 |
– |
#if 0 |
| 761 |
– |
shm_unlink(shmFname); |
| 762 |
– |
#else |
| 765 |
|
unlink(shmFname); |
| 766 |
+ |
#else |
| 767 |
+ |
free(photonCnt); |
| 768 |
|
#endif |
| 769 |
< |
|
| 769 |
> |
if (verbose) |
| 770 |
> |
eputs("\n"); |
| 771 |
> |
|
| 772 |
|
for (t = 0; t < NUM_PMAP_TYPES; t++) |
| 773 |
|
if (pmaps [t]) { |
| 774 |
< |
if (photonRepTime) { |
| 775 |
< |
sprintf(errmsg, "\nBuilding %s photon map...\n", pmapName [t]); |
| 774 |
> |
if (verbose) { |
| 775 |
> |
sprintf(errmsg, "Building %s photon map\n", pmapName [t]); |
| 776 |
|
eputs(errmsg); |
| 777 |
+ |
#if NIX |
| 778 |
|
fflush(stderr); |
| 779 |
+ |
#endif |
| 780 |
|
} |
| 781 |
|
|
| 782 |
|
/* Build underlying data structure; heap is destroyed */ |
| 783 |
|
buildPhotonMap(pmaps [t], &totalFlux, NULL, numProc); |
| 784 |
|
} |
| 785 |
< |
|
| 785 |
> |
|
| 786 |
|
/* Precompute photon irradiance if necessary */ |
| 787 |
< |
if (preCompPmap) |
| 787 |
> |
if (preCompPmap) { |
| 788 |
> |
if (verbose) |
| 789 |
> |
eputs("\n"); |
| 790 |
|
preComputeGlobal(preCompPmap); |
| 791 |
< |
} |
| 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); |
| 791 |
> |
} |
| 792 |
|
|
| 793 |
< |
/* Need at least 2 photons */ |
| 794 |
< |
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 |
| 793 |
> |
if (verbose) |
| 794 |
> |
eputs("\n"); |
| 795 |
|
} |
