4 |
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|
5 |
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/* |
6 |
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====================================================================== |
7 |
< |
Photon map support for light source contributions |
7 |
> |
Photon map for light source contributions |
8 |
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|
9 |
|
Roland Schregle (roland.schregle@{hslu.ch, gmail.com}) |
10 |
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(c) Lucerne University of Applied Sciences and Arts, |
23 |
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#include "pmapdiag.h" |
24 |
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#include "rcontrib.h" |
25 |
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#include "otypes.h" |
26 |
< |
#include <sys/mman.h> |
27 |
< |
#include <sys/wait.h> |
26 |
> |
#if NIX |
27 |
> |
#include <sys/mman.h> |
28 |
> |
#include <sys/wait.h> |
29 |
> |
#endif |
30 |
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|
31 |
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|
30 |
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|
31 |
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static void setPmapContribParams (PhotonMap *pmap, LUTAB *srcContrib) |
32 |
– |
/* Set parameters for light source contributions */ |
33 |
– |
{ |
34 |
– |
/* Set light source modifier list and appropriate callback to extract |
35 |
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* their contributions from the photon map */ |
36 |
– |
if (pmap) { |
37 |
– |
pmap -> srcContrib = srcContrib; |
38 |
– |
pmap -> lookup = photonContrib; |
39 |
– |
/* Ensure we get all requested photon contribs during lookups */ |
40 |
– |
pmap -> gatherTolerance = 1.0; |
41 |
– |
} |
42 |
– |
} |
43 |
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|
44 |
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|
45 |
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|
46 |
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static void checkPmapContribs (const PhotonMap *pmap, LUTAB *srcContrib) |
47 |
– |
/* Check modifiers for light source contributions */ |
48 |
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{ |
49 |
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const PhotonPrimary *primary = pmap -> primaries; |
50 |
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PhotonPrimaryIdx i, found = 0; |
51 |
– |
OBJREC *srcMod; |
52 |
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|
53 |
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/* Make sure at least one of the modifiers is actually in the pmap, |
54 |
– |
* otherwise findPhotons() winds up in an infinite loop! */ |
55 |
– |
for (i = pmap -> numPrimary; i; --i, ++primary) { |
56 |
– |
if (primary -> srcIdx < 0 || primary -> srcIdx >= nsources) |
57 |
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error(INTERNAL, "invalid light source index in photon map"); |
58 |
– |
|
59 |
– |
srcMod = findmaterial(source [primary -> srcIdx].so); |
60 |
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if ((MODCONT*)lu_find(srcContrib, srcMod -> oname) -> data) |
61 |
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++found; |
62 |
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} |
63 |
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|
64 |
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if (!found) |
65 |
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error(USER, "modifiers not in photon map"); |
66 |
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} |
67 |
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|
68 |
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|
69 |
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|
70 |
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void initPmapContrib (LUTAB *srcContrib, unsigned numSrcContrib) |
71 |
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{ |
72 |
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unsigned t; |
73 |
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|
74 |
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for (t = 0; t < NUM_PMAP_TYPES; t++) |
75 |
– |
if (photonMaps [t] && t != PMAP_TYPE_CONTRIB) { |
76 |
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sprintf(errmsg, "%s photon map does not support contributions", |
77 |
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pmapName [t]); |
78 |
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error(USER, errmsg); |
79 |
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} |
80 |
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|
81 |
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/* Get params */ |
82 |
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setPmapContribParams(contribPmap, srcContrib); |
83 |
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|
84 |
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if (contribPhotonMapping) { |
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if (contribPmap -> maxGather < numSrcContrib) { |
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/* Adjust density estimate bandwidth if lower than modifier |
87 |
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* count, otherwise contributions are missing */ |
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error(WARNING, "contrib density estimate bandwidth too low, " |
89 |
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"adjusting to modifier count"); |
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contribPmap -> maxGather = numSrcContrib; |
91 |
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} |
92 |
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|
93 |
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/* Sanity check */ |
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checkPmapContribs(contribPmap, srcContrib); |
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} |
96 |
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} |
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|
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|
99 |
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|
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static PhotonPrimaryIdx newPhotonPrimary (PhotonMap *pmap, |
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const RAY *primRay, |
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FILE *primHeap) |
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return 0; |
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|
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/* 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 |
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* before overwriting it */ |
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> |
* newPhoton()), in which case we save it to the primary heap file |
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> |
* before clobbering it */ |
48 |
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if (pmap -> lastPrimary.srcIdx >= 0) { |
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if (!fwrite(&pmap -> lastPrimary, sizeof(PhotonPrimary), 1, primHeap)) |
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error(SYSTEM, "failed writing photon primary in newPhotonPrimary"); |
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|
61 |
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if (primRay) { |
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FVECT dvec; |
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< |
|
63 |
> |
|
64 |
> |
#ifdef PMAP_PRIMARYDIR |
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/* Reverse incident direction to point to light source */ |
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dvec [0] = -primRay -> rdir [0]; |
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dvec [1] = -primRay -> rdir [1]; |
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dvec [2] = -primRay -> rdir [2]; |
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pmap -> lastPrimary.dir = encodedir(dvec); |
70 |
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#endif |
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#ifdef PMAP_PRIMARYPOS |
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VCOPY(pmap -> lastPrimary.pos, primRay -> rop); |
73 |
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#endif |
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|
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|
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|
81 |
< |
#ifdef DEBUG_PMAP_CONTRIB |
81 |
> |
#ifdef DEBUG_PMAP |
82 |
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static int checkPrimaryHeap (FILE *file) |
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/* Check heap for ordered primaries */ |
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{ |
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|
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|
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static PhotonPrimaryIdx buildPrimaries (PhotonMap *pmap, FILE **primaryHeap, |
121 |
+ |
char **primaryHeapFname, |
122 |
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PhotonPrimaryIdx *primaryOfs, |
123 |
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unsigned numHeaps) |
124 |
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/* Consolidate per-subprocess photon primary heaps into the primary array |
136 |
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for (heap = 0; heap < numHeaps; heap++) { |
137 |
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primaryOfs [heap] = pmap -> numPrimary; |
138 |
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|
139 |
< |
if (fseek(primaryHeap [heap], 0, SEEK_END)) |
139 |
> |
if (fseek(primaryHeap [heap], 0, SEEK_END) < 0) |
140 |
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error(SYSTEM, "failed photon primary seek in buildPrimaries"); |
141 |
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pmap -> numPrimary += heapLen = ftell(primaryHeap [heap]) / |
142 |
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sizeof(PhotonPrimary); |
152 |
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heapLen, primaryHeap [heap]) != heapLen) |
153 |
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error(SYSTEM, "failed reading photon primaries in buildPrimaries"); |
154 |
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|
155 |
< |
fclose(primaryHeap [heap]); |
155 |
> |
fclose(primaryHeap [heap]); |
156 |
> |
unlink(primaryHeapFname [heap]); |
157 |
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} |
158 |
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|
159 |
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return pmap -> numPrimary; |
175 |
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void distribPhotonContrib (PhotonMap* pm, unsigned numProc) |
176 |
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{ |
177 |
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EmissionMap emap; |
178 |
< |
char errmsg2 [128], shmFname [255]; |
178 |
> |
char errmsg2 [128], shmFname [PMAP_TMPFNLEN]; |
179 |
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unsigned srcIdx, proc; |
180 |
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int shmFile, stat, pid; |
181 |
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double *srcFlux, /* Emitted flux per light source */ |
182 |
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srcDistribTarget; /* Target photon count per source */ |
183 |
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PhotonContribCnt *photonCnt; /* Photon emission counter array */ |
184 |
< |
const unsigned photonCntSize = sizeof(PhotonContribCnt) * |
184 |
> |
unsigned photonCntSize = sizeof(PhotonContribCnt) * |
185 |
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PHOTONCNT_NUMEMIT(nsources); |
186 |
< |
FILE *primaryHeap [numProc]; |
187 |
< |
PhotonPrimaryIdx primaryOfs [numProc]; |
186 |
> |
FILE **primaryHeap = NULL; |
187 |
> |
char **primaryHeapFname = NULL; |
188 |
> |
PhotonPrimaryIdx *primaryOfs = NULL; |
189 |
|
|
190 |
|
if (!pm) |
191 |
|
error(USER, "no photon map defined in distribPhotonContrib"); |
222 |
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|
223 |
|
/* Per-subprocess / per-source target counts */ |
224 |
|
pm -> distribTarget /= numProc; |
225 |
< |
srcDistribTarget = nsources ? (double)pm -> distribTarget / nsources : 0; |
225 |
> |
srcDistribTarget = nsources ? (double)pm -> distribTarget / nsources : 0; |
226 |
|
|
227 |
+ |
if (!pm -> distribTarget) |
228 |
+ |
error(INTERNAL, "no photons to distribute in distribPhotonContrib"); |
229 |
+ |
|
230 |
|
/* Get photon ports if specified */ |
231 |
|
if (ambincl == 1) |
232 |
|
getPhotonPorts(); |
233 |
|
|
234 |
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/* Get photon sensor modifiers */ |
235 |
|
getPhotonSensors(photonSensorList); |
236 |
< |
|
236 |
> |
|
237 |
> |
#if NIX |
238 |
|
/* Set up shared mem for photon counters (zeroed by ftruncate) */ |
239 |
< |
#if 0 |
299 |
< |
snprintf(shmFname, 255, PMAP_SHMFNAME, getpid()); |
300 |
< |
shmFile = shm_open(shmFname, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR); |
301 |
< |
#else |
302 |
< |
strcpy(shmFname, PMAP_SHMFNAME); |
239 |
> |
strcpy(shmFname, PMAP_TMPFNAME); |
240 |
|
shmFile = mkstemp(shmFname); |
304 |
– |
#endif |
241 |
|
|
242 |
|
if (shmFile < 0 || ftruncate(shmFile, photonCntSize) < 0) |
243 |
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error(SYSTEM, "failed shared mem init in distribPhotonContrib"); |
247 |
|
|
248 |
|
if (photonCnt == MAP_FAILED) |
249 |
|
error(SYSTEM, "failed shared mem mapping in distribPhotonContrib"); |
250 |
+ |
#else |
251 |
+ |
/* Allocate photon counters statically on Windoze */ |
252 |
+ |
if (!(photonCnt = malloc(photonCntSize))) |
253 |
+ |
error(SYSTEM, "failed trivial malloc in distribPhotonContrib"); |
254 |
+ |
|
255 |
+ |
for (srcIdx = 0; srcIdx < PHOTONCNT_NUMEMIT(nsources); srcIdx++) |
256 |
+ |
photonCnt [srcIdx] = 0; |
257 |
+ |
#endif /* NIX */ |
258 |
|
|
259 |
+ |
if (verbose) { |
260 |
+ |
sprintf(errmsg, "\nIntegrating flux from %d sources", nsources); |
261 |
+ |
|
262 |
+ |
if (photonPorts) { |
263 |
+ |
sprintf(errmsg2, " via %d ports", numPhotonPorts); |
264 |
+ |
strcat(errmsg, errmsg2); |
265 |
+ |
} |
266 |
+ |
|
267 |
+ |
strcat(errmsg, "\n"); |
268 |
+ |
eputs(errmsg); |
269 |
+ |
} |
270 |
+ |
|
271 |
|
/* ============================================================= |
272 |
< |
* FLUX INTEGRATION - Get total flux emitted from light source |
272 |
> |
* FLUX INTEGRATION - Get total flux emitted from sources/ports |
273 |
|
* ============================================================= */ |
274 |
|
for (srcIdx = 0; srcIdx < nsources; srcIdx++) { |
275 |
< |
unsigned portCnt = 0; |
320 |
< |
|
275 |
> |
unsigned portCnt = 0; |
276 |
|
srcFlux [srcIdx] = 0; |
277 |
|
emap.src = source + srcIdx; |
278 |
|
|
324 |
– |
if (photonRepTime) |
325 |
– |
eputs("\n"); |
326 |
– |
|
279 |
|
do { /* Need at least one iteration if no ports! */ |
280 |
|
emap.port = emap.src -> sflags & SDISTANT ? photonPorts + portCnt |
281 |
|
: NULL; |
282 |
|
photonPartition [emap.src -> so -> otype] (&emap); |
283 |
< |
|
284 |
< |
if (photonRepTime) { |
285 |
< |
sprintf(errmsg, "Integrating flux from source %s (mod %s) ", |
286 |
< |
source [srcIdx].so -> oname, |
287 |
< |
objptr(source [srcIdx].so -> omod) -> oname); |
336 |
< |
|
283 |
> |
|
284 |
> |
if (verbose) { |
285 |
> |
sprintf(errmsg, "\tIntegrating flux from source %s ", |
286 |
> |
source [srcIdx].so -> oname); |
287 |
> |
|
288 |
|
if (emap.port) { |
289 |
|
sprintf(errmsg2, "via port %s ", |
290 |
|
photonPorts [portCnt].so -> oname); |
291 |
|
strcat(errmsg, errmsg2); |
292 |
|
} |
293 |
< |
|
294 |
< |
sprintf(errmsg2, "(%lu partitions)...\n", emap.numPartitions); |
293 |
> |
|
294 |
> |
sprintf(errmsg2, "(%lu partitions)\n", emap.numPartitions); |
295 |
|
strcat(errmsg, errmsg2); |
296 |
|
eputs(errmsg); |
297 |
+ |
#if NIX |
298 |
|
fflush(stderr); |
299 |
< |
} |
299 |
> |
#endif |
300 |
> |
} |
301 |
|
|
302 |
|
for (emap.partitionCnt = 0; emap.partitionCnt < emap.numPartitions; |
303 |
|
emap.partitionCnt++) { |
314 |
|
error(WARNING, errmsg); |
315 |
|
} |
316 |
|
} |
317 |
< |
|
318 |
< |
if (photonRepTime) |
319 |
< |
eputs("\n"); |
320 |
< |
|
321 |
< |
/* Init per-subprocess primary heap files */ |
322 |
< |
for (proc = 0; proc < numProc; proc++) |
323 |
< |
if (!(primaryHeap [proc] = tmpfile())) |
317 |
> |
|
318 |
> |
/* Allocate & init per-subprocess primary heap files */ |
319 |
> |
primaryHeap = calloc(numProc, sizeof(FILE*)); |
320 |
> |
primaryHeapFname = calloc(numProc, sizeof(char*)); |
321 |
> |
primaryOfs = calloc(numProc, sizeof(PhotonPrimaryIdx)); |
322 |
> |
if (!primaryHeap || !primaryHeapFname || !primaryOfs) |
323 |
> |
error(SYSTEM, "failed primary heap allocation in " |
324 |
> |
"distribPhotonContrib"); |
325 |
> |
|
326 |
> |
for (proc = 0; proc < numProc; proc++) { |
327 |
> |
primaryHeapFname [proc] = malloc(PMAP_TMPFNLEN); |
328 |
> |
if (!primaryHeapFname [proc]) |
329 |
> |
error(SYSTEM, "failed primary heap file allocation in " |
330 |
> |
"distribPhotonContrib"); |
331 |
> |
|
332 |
> |
mktemp(strcpy(primaryHeapFname [proc], PMAP_TMPFNAME)); |
333 |
> |
if (!(primaryHeap [proc] = fopen(primaryHeapFname [proc], "w+b"))) |
334 |
|
error(SYSTEM, "failed opening primary heap file in " |
335 |
|
"distribPhotonContrib"); |
336 |
+ |
} |
337 |
+ |
|
338 |
+ |
/* Record start time for progress reports */ |
339 |
+ |
repStartTime = time(NULL); |
340 |
+ |
|
341 |
+ |
if (verbose) { |
342 |
+ |
sprintf(errmsg, "\nPhoton distribution @ %d procs\n", numProc); |
343 |
+ |
eputs(errmsg); |
344 |
+ |
} |
345 |
|
|
346 |
|
/* MAIN LOOP */ |
347 |
|
for (proc = 0; proc < numProc; proc++) { |
348 |
+ |
#if NIX |
349 |
|
if (!(pid = fork())) { |
350 |
< |
/* SUBPROCESS ENTERS HERE; |
351 |
< |
* all opened and memory mapped files are inherited */ |
352 |
< |
|
350 |
> |
/* SUBPROCESS ENTERS HERE; opened and mmapped files inherited */ |
351 |
> |
#else |
352 |
> |
if (1) { |
353 |
> |
/* No subprocess under Windoze */ |
354 |
> |
#endif |
355 |
|
/* Local photon counters for this subprocess */ |
356 |
|
unsigned long lastNumPhotons = 0, localNumEmitted = 0; |
357 |
< |
double photonFluxSum = 0; /* Running photon flux sum */ |
357 |
> |
double photonFluxSum = 0; /* Accum. photon flux */ |
358 |
|
|
359 |
|
/* Seed RNGs from PID for decorellated photon distribution */ |
360 |
|
pmapSeed(randSeed + proc, partState); |
383 |
|
while (passCnt < 2) { |
384 |
|
if (!passCnt) { |
385 |
|
/* INIT PASS 1 */ |
386 |
< |
if (++prePassCnt > maxPreDistrib) { |
386 |
> |
if (++prePassCnt > maxPreDistrib && !proc) { |
387 |
|
/* Warn if no photons contributed after sufficient |
388 |
< |
* iterations */ |
389 |
< |
sprintf(errmsg, "proc %d, source %s: " |
390 |
< |
"too many prepasses, skipped", |
391 |
< |
proc, source [srcIdx].so -> oname); |
388 |
> |
* iterations; only output from subprocess 0 to reduce |
389 |
> |
* console clutter */ |
390 |
> |
sprintf(errmsg, |
391 |
> |
"source %s: too many prepasses, skipped", |
392 |
> |
source [srcIdx].so -> oname); |
393 |
|
error(WARNING, errmsg); |
394 |
|
break; |
395 |
|
} |
424 |
|
if (avgPhotonFlux > 0 && |
425 |
|
srcPhotonFlux / avgPhotonFlux < FTINY) { |
426 |
|
/* Skip source if its photon flux is grossly below the |
427 |
< |
* running average, indicating negligible contribs at |
428 |
< |
* the expense of excessive distribution time */ |
429 |
< |
sprintf(errmsg, "proc %d, source %s: " |
430 |
< |
"itsy bitsy photon flux, skipped", |
431 |
< |
proc, source [srcIdx].so -> oname); |
427 |
> |
* running average, indicating negligible contributions |
428 |
> |
* at the expense of excessive distribution time; only |
429 |
> |
* output from subproc 0 to reduce console clutter */ |
430 |
> |
sprintf(errmsg, |
431 |
> |
"source %s: itsy bitsy photon flux, skipped", |
432 |
> |
source [srcIdx].so -> oname); |
433 |
|
error(WARNING, errmsg); |
434 |
|
srcNumEmit = 0; |
435 |
|
} |
437 |
|
/* Update sum of photon flux per light source */ |
438 |
|
photonFluxSum += srcPhotonFlux; |
439 |
|
} |
440 |
< |
|
440 |
> |
|
441 |
|
portCnt = 0; |
442 |
|
do { /* Need at least one iteration if no ports! */ |
443 |
|
emap.src = source + srcIdx; |
444 |
|
emap.port = emap.src -> sflags & SDISTANT |
445 |
|
? photonPorts + portCnt : NULL; |
446 |
|
photonPartition [emap.src -> so -> otype] (&emap); |
447 |
< |
|
448 |
< |
if (photonRepTime && !proc) { |
447 |
> |
|
448 |
> |
if (verbose && !proc) { |
449 |
> |
/* Output from subproc 0 only to avoid race condition |
450 |
> |
* on console I/O */ |
451 |
|
if (!passCnt) |
452 |
< |
sprintf(errmsg, "PREPASS %d on source %s (mod %s) ", |
453 |
< |
prePassCnt, source [srcIdx].so -> oname, |
475 |
< |
objptr(source[srcIdx].so->omod) -> oname); |
452 |
> |
sprintf(errmsg, "\tPREPASS %d on source %s ", |
453 |
> |
prePassCnt, source [srcIdx].so -> oname); |
454 |
|
else |
455 |
< |
sprintf(errmsg, "MAIN PASS on source %s (mod %s) ", |
456 |
< |
source [srcIdx].so -> oname, |
457 |
< |
objptr(source[srcIdx].so->omod) -> oname); |
480 |
< |
|
455 |
> |
sprintf(errmsg, "\tMAIN PASS on source %s ", |
456 |
> |
source [srcIdx].so -> oname); |
457 |
> |
|
458 |
|
if (emap.port) { |
459 |
|
sprintf(errmsg2, "via port %s ", |
460 |
|
photonPorts [portCnt].so -> oname); |
461 |
|
strcat(errmsg, errmsg2); |
462 |
|
} |
463 |
< |
|
463 |
> |
|
464 |
|
sprintf(errmsg2, "(%lu partitions)\n", |
465 |
|
emap.numPartitions); |
466 |
< |
strcat(errmsg, errmsg2); |
466 |
> |
strcat(errmsg, errmsg2); |
467 |
|
eputs(errmsg); |
468 |
+ |
#if NIX |
469 |
|
fflush(stderr); |
470 |
< |
} |
470 |
> |
#endif |
471 |
> |
} |
472 |
|
|
473 |
|
for (emap.partitionCnt = 0; emap.partitionCnt < emap.numPartitions; |
474 |
|
emap.partitionCnt++) { |
492 |
|
partEmitCnt++; |
493 |
|
|
494 |
|
/* Update local and shared global emission counter */ |
516 |
– |
localNumEmitted += partEmitCnt; |
495 |
|
photonCnt [PHOTONCNT_NUMEMIT(srcIdx)] += partEmitCnt; |
496 |
+ |
localNumEmitted += partEmitCnt; |
497 |
|
|
498 |
< |
/* Integer counter avoids FP rounding errors */ |
498 |
> |
/* Integer counter avoids FP rounding errors during |
499 |
> |
* iteration */ |
500 |
|
while (partEmitCnt--) { |
501 |
|
RAY photonRay; |
502 |
|
|
505 |
|
* until absorbed/leaked; emitPhoton() sets the |
506 |
|
* emitting light source index in photonRay */ |
507 |
|
emitPhoton(&emap, &photonRay); |
508 |
+ |
#if 1 |
509 |
+ |
if (emap.port) |
510 |
+ |
/* !!! PHOTON PORT REJECTION SAMPLING HACK: set |
511 |
+ |
* !!! photon port as fake hit object for |
512 |
+ |
* !!! primary ray to check for intersection in |
513 |
+ |
* !!! tracePhoton() */ |
514 |
+ |
photonRay.ro = emap.port -> so; |
515 |
+ |
#endif |
516 |
|
newPhotonPrimary(pm, &photonRay, primaryHeap[proc]); |
517 |
|
/* Set subprocess index in photonRay for post- |
518 |
|
* distrib primary index linearisation; this is |
526 |
|
photonCnt [PHOTONCNT_NUMPHOT] += pm -> numPhotons - |
527 |
|
lastNumPhotons; |
528 |
|
lastNumPhotons = pm -> numPhotons; |
529 |
+ |
#if !NIX |
530 |
+ |
/* Synchronous progress report on Windoze */ |
531 |
+ |
if (!proc && photonRepTime > 0 && |
532 |
+ |
time(NULL) >= repLastTime + photonRepTime) { |
533 |
+ |
unsigned s; |
534 |
+ |
repComplete = pm -> distribTarget * numProc; |
535 |
+ |
repProgress = photonCnt [PHOTONCNT_NUMPHOT]; |
536 |
+ |
|
537 |
+ |
for (repEmitted = 0, s = 0; s < nsources; s++) |
538 |
+ |
repEmitted += photonCnt [PHOTONCNT_NUMEMIT(s)]; |
539 |
+ |
|
540 |
+ |
pmapDistribReport(); |
541 |
+ |
} |
542 |
+ |
#endif |
543 |
|
} |
544 |
|
|
545 |
|
portCnt++; |
546 |
|
} while (portCnt < numPhotonPorts); |
547 |
|
|
548 |
< |
if (pm -> numPhotons == srcNumDistrib) |
548 |
> |
if (pm -> numPhotons == srcNumDistrib) { |
549 |
|
/* Double predistrib factor in case no photons were stored |
550 |
|
* for this source and redo pass 1 */ |
551 |
|
srcPreDistrib *= 2; |
552 |
+ |
} |
553 |
|
else { |
554 |
|
/* Now do pass 2 */ |
555 |
|
passCnt++; |
553 |
– |
/* if (photonRepTime) |
554 |
– |
eputs("\n"); */ |
556 |
|
} |
557 |
|
} |
558 |
|
} |
559 |
|
|
560 |
|
/* Flush heap buffa one final time to prevent data corruption */ |
561 |
< |
flushPhotonHeap(pm); |
561 |
< |
fclose(pm -> heap); |
562 |
< |
|
561 |
> |
flushPhotonHeap(pm); |
562 |
|
/* Flush final photon primary to primary heap file */ |
563 |
|
newPhotonPrimary(pm, NULL, primaryHeap [proc]); |
564 |
< |
fclose(primaryHeap [proc]); |
564 |
> |
/* Heap files closed automatically on exit |
565 |
> |
fclose(pm -> heap); |
566 |
> |
fclose(primaryHeap [proc]); */ |
567 |
|
|
568 |
|
#ifdef DEBUG_PMAP |
569 |
< |
sprintf(errmsg, "Proc %d exited with total %ld photons\n", proc, |
569 |
> |
sprintf(errmsg, "Proc %d total %ld photons\n", proc, |
570 |
|
pm -> numPhotons); |
571 |
|
eputs(errmsg); |
572 |
+ |
fflush(stderr); |
573 |
|
#endif |
574 |
|
|
575 |
+ |
#if NIX |
576 |
+ |
/* Terminate subprocess */ |
577 |
|
exit(0); |
578 |
+ |
#endif |
579 |
|
} |
580 |
|
else if (pid < 0) |
581 |
|
error(SYSTEM, "failed to fork subprocess in distribPhotonContrib"); |
582 |
|
} |
583 |
|
|
584 |
+ |
#if NIX |
585 |
|
/* PARENT PROCESS CONTINUES HERE */ |
580 |
– |
/* Record start time and enable progress report signal handler */ |
581 |
– |
repStartTime = time(NULL); |
586 |
|
#ifdef SIGCONT |
587 |
+ |
/* Enable progress report signal handler */ |
588 |
|
signal(SIGCONT, pmapDistribReport); |
589 |
|
#endif |
585 |
– |
/* |
586 |
– |
if (photonRepTime) |
587 |
– |
eputs("\n"); */ |
588 |
– |
|
590 |
|
/* Wait for subprocesses to complete while reporting progress */ |
591 |
|
proc = numProc; |
592 |
|
while (proc) { |
600 |
|
|
601 |
|
/* Nod off for a bit and update progress */ |
602 |
|
sleep(1); |
603 |
< |
|
604 |
< |
/* Update progress report from shared subprocess counters */ |
603 |
> |
|
604 |
> |
/* Asynchronous progress report from shared subprocess counters */ |
605 |
|
repComplete = pm -> distribTarget * numProc; |
606 |
< |
repProgress = photonCnt [PHOTONCNT_NUMPHOT]; |
606 |
> |
repProgress = photonCnt [PHOTONCNT_NUMPHOT]; |
607 |
> |
|
608 |
|
for (repEmitted = 0, srcIdx = 0; srcIdx < nsources; srcIdx++) |
609 |
|
repEmitted += photonCnt [PHOTONCNT_NUMEMIT(srcIdx)]; |
610 |
|
|
617 |
|
else signal(SIGCONT, pmapDistribReport); |
618 |
|
#endif |
619 |
|
} |
620 |
+ |
#endif /* NIX */ |
621 |
|
|
622 |
|
/* ================================================================ |
623 |
|
* POST-DISTRIBUTION - Set photon flux and build kd-tree, etc. |
624 |
|
* ================================================================ */ |
625 |
|
#ifdef SIGCONT |
626 |
+ |
/* Reset signal handler */ |
627 |
|
signal(SIGCONT, SIG_DFL); |
628 |
|
#endif |
629 |
|
free(emap.samples); |
630 |
|
|
631 |
|
if (!pm -> numPhotons) |
632 |
< |
error(USER, "empty photon map"); |
632 |
> |
error(USER, "empty contribution photon map"); |
633 |
|
|
634 |
|
/* Load per-subprocess primary rays into pm -> primary array */ |
635 |
< |
pm -> numPrimary = buildPrimaries(pm, primaryHeap, primaryOfs, numProc); |
635 |
> |
/* Dumb compilers apparently need the char** cast */ |
636 |
> |
pm -> numPrimary = buildPrimaries(pm, primaryHeap, |
637 |
> |
(char**)primaryHeapFname, |
638 |
> |
primaryOfs, numProc); |
639 |
|
if (!pm -> numPrimary) |
640 |
|
error(INTERNAL, "no primary rays in contribution photon map"); |
641 |
|
|
642 |
|
/* Set photon flux per source */ |
643 |
|
for (srcIdx = 0; srcIdx < nsources; srcIdx++) |
644 |
|
srcFlux [srcIdx] /= photonCnt [PHOTONCNT_NUMEMIT(srcIdx)]; |
645 |
< |
|
645 |
> |
#if NIX |
646 |
|
/* Photon counters no longer needed, unmap shared memory */ |
647 |
|
munmap(photonCnt, sizeof(*photonCnt)); |
648 |
|
close(shmFile); |
642 |
– |
#if 0 |
643 |
– |
shm_unlink(shmFname); |
644 |
– |
#else |
649 |
|
unlink(shmFname); |
650 |
+ |
#else |
651 |
+ |
free(photonCnt); |
652 |
|
#endif |
653 |
|
|
654 |
< |
if (photonRepTime) { |
655 |
< |
eputs("\nBuilding contrib photon map...\n"); |
654 |
> |
if (verbose) { |
655 |
> |
eputs("\nBuilding contribution photon map...\n"); |
656 |
> |
#if NIX |
657 |
|
fflush(stderr); |
658 |
+ |
#endif |
659 |
|
} |
660 |
|
|
661 |
|
/* Build underlying data structure; heap is destroyed */ |
662 |
< |
buildPhotonMap(pm, srcFlux, primaryOfs, numProc); |
655 |
< |
} |
656 |
< |
|
657 |
< |
|
658 |
< |
|
659 |
< |
void photonContrib (PhotonMap *pmap, RAY *ray, COLOR irrad) |
660 |
< |
/* Sum up light source contributions from photons in pmap->srcContrib */ |
661 |
< |
{ |
662 |
< |
unsigned i; |
663 |
< |
PhotonSearchQueueNode *sqn; |
664 |
< |
float r, invArea; |
665 |
< |
RREAL rayCoeff [3]; |
666 |
< |
Photon *photon; |
667 |
< |
static char warn = 1; |
668 |
< |
|
669 |
< |
setcolor(irrad, 0, 0, 0); |
670 |
< |
|
671 |
< |
if (!pmap -> maxGather) |
672 |
< |
return; |
673 |
< |
|
674 |
< |
/* Ignore sources */ |
675 |
< |
if (ray -> ro && islight(objptr(ray -> ro -> omod) -> otype)) |
676 |
< |
return; |
677 |
< |
|
678 |
< |
/* Get cumulative path coefficient up to photon lookup point */ |
679 |
< |
raycontrib(rayCoeff, ray, PRIMARY); |
680 |
< |
|
681 |
< |
/* Lookup photons */ |
682 |
< |
pmap -> squeue.tail = 0; |
683 |
< |
findPhotons(pmap, ray); |
662 |
> |
buildPhotonMap(pm, srcFlux, primaryOfs, numProc); |
663 |
|
|
664 |
< |
/* Need at least 2 photons */ |
665 |
< |
if (pmap -> squeue.tail < 2) { |
666 |
< |
#ifdef PMAP_NONEFOUND |
688 |
< |
sprintf(errmsg, "no photons found on %s at (%.3f, %.3f, %.3f)", |
689 |
< |
ray -> ro ? ray -> ro -> oname : "<null>", |
690 |
< |
ray -> rop [0], ray -> rop [1], ray -> rop [2]); |
691 |
< |
error(WARNING, errmsg); |
692 |
< |
#endif |
664 |
> |
/* Free per-subprocess primary heap files */ |
665 |
> |
for (proc = 0; proc < numProc; proc++) |
666 |
> |
free(primaryHeapFname [proc]); |
667 |
|
|
668 |
< |
return; |
669 |
< |
} |
670 |
< |
|
697 |
< |
/* Average (squared) radius between furthest two photons to improve |
698 |
< |
* accuracy and get inverse search area 1 / (PI * r^2), with extra |
699 |
< |
* normalisation factor 1 / PI for ambient calculation */ |
700 |
< |
sqn = pmap -> squeue.node + 1; |
701 |
< |
r = max(sqn -> dist2, (sqn + 1) -> dist2); |
702 |
< |
r = 0.25 * (pmap -> maxDist2 + r + 2 * sqrt(pmap -> maxDist2 * r)); |
703 |
< |
invArea = 1 / (PI * PI * r); |
668 |
> |
free(primaryHeapFname); |
669 |
> |
free(primaryHeap); |
670 |
> |
free(primaryOfs); |
671 |
|
|
672 |
< |
/* Skip the extra photon */ |
673 |
< |
for (i = 1 ; i < pmap -> squeue.tail; i++, sqn++) { |
707 |
< |
COLOR flux; |
708 |
< |
|
709 |
< |
/* Get photon's contribution to density estimate */ |
710 |
< |
photon = getNearestPhoton(&pmap -> squeue, sqn -> idx); |
711 |
< |
getPhotonFlux(photon, flux); |
712 |
< |
scalecolor(flux, invArea); |
713 |
< |
#ifdef PMAP_EPANECHNIKOV |
714 |
< |
/* Apply Epanechnikov kernel to photon flux based on photon distance */ |
715 |
< |
scalecolor(flux, 2 * (1 - sqn -> dist2 / r)); |
716 |
< |
#endif |
717 |
< |
addcolor(irrad, flux); |
718 |
< |
|
719 |
< |
if (pmap -> srcContrib) { |
720 |
< |
const PhotonPrimary *primary = pmap -> primaries + |
721 |
< |
photon -> primary; |
722 |
< |
const SRCREC *sp = &source [primary -> srcIdx]; |
723 |
< |
OBJREC *srcMod = findmaterial(sp -> so); |
724 |
< |
MODCONT *srcContrib = (MODCONT*)lu_find(pmap -> srcContrib, |
725 |
< |
srcMod -> oname) -> data; |
726 |
< |
double srcBinReal; |
727 |
< |
int srcBin; |
728 |
< |
RAY srcRay; |
729 |
< |
|
730 |
< |
if (!srcContrib) |
731 |
< |
continue; |
732 |
< |
|
733 |
< |
/* Photon's emitting light source has modifier whose contributions |
734 |
< |
* are sought */ |
735 |
< |
if (srcContrib -> binv -> type != NUM) { |
736 |
< |
/* Use intersection function to set shadow ray parameters if |
737 |
< |
* it's not simply a constant */ |
738 |
< |
rayorigin(&srcRay, SHADOW, NULL, NULL); |
739 |
< |
srcRay.rsrc = primary -> srcIdx; |
740 |
< |
#ifdef PMAP_PRIMARYPOS |
741 |
< |
VCOPY(srcRay.rorg, primary -> pos); |
742 |
< |
#else |
743 |
< |
/* No primary hitpoints; set dummy ray origin and warn once */ |
744 |
< |
srcRay.rorg [0] = srcRay.rorg [1] = srcRay.rorg [2] = 0; |
745 |
< |
if (warn) { |
746 |
< |
error(WARNING, "no photon primary hitpoints for bin evaluation;" |
747 |
< |
" using dummy (0,0,0) !"); |
748 |
< |
warn = 0; |
749 |
< |
} |
750 |
< |
#endif |
751 |
< |
decodedir(srcRay.rdir, primary -> dir); |
752 |
< |
|
753 |
< |
if (!(sp->sflags & SDISTANT |
754 |
< |
? sourcehit(&srcRay) |
755 |
< |
: (*ofun[sp -> so -> otype].funp)(sp -> so, &srcRay))) |
756 |
< |
continue; /* XXX shouldn't happen! */ |
757 |
< |
|
758 |
< |
worldfunc(RCCONTEXT, &srcRay); |
759 |
< |
set_eparams((char *)srcContrib -> params); |
760 |
< |
} |
761 |
< |
|
762 |
< |
if ((srcBinReal = evalue(srcContrib -> binv)) < -.5) |
763 |
< |
continue; /* silently ignore negative bins */ |
764 |
< |
|
765 |
< |
if ((srcBin = srcBinReal + .5) >= srcContrib -> nbins) { |
766 |
< |
error(WARNING, "bad bin number (ignored)"); |
767 |
< |
continue; |
768 |
< |
} |
769 |
< |
|
770 |
< |
if (!contrib) { |
771 |
< |
/* Ray coefficient mode; normalise by light source radiance |
772 |
< |
* after applying distrib pattern */ |
773 |
< |
int j; |
774 |
< |
|
775 |
< |
raytexture(ray, srcMod -> omod); |
776 |
< |
setcolor(ray -> rcol, srcMod -> oargs.farg [0], |
777 |
< |
srcMod -> oargs.farg [1], srcMod -> oargs.farg [2]); |
778 |
< |
multcolor(ray -> rcol, ray -> pcol); |
779 |
< |
for (j = 0; j < 3; j++) |
780 |
< |
flux [j] = ray -> rcol [j] ? flux [j] / ray -> rcol [j] : 0; |
781 |
< |
} |
782 |
< |
|
783 |
< |
multcolor(flux, rayCoeff); |
784 |
< |
addcolor(srcContrib -> cbin [srcBin], flux); |
785 |
< |
} |
786 |
< |
} |
787 |
< |
|
788 |
< |
return; |
672 |
> |
if (verbose) |
673 |
> |
eputs("\n"); |
674 |
|
} |