| 276 |
|
{ |
| 277 |
|
static int rdepth = 0; /* ambient recursion */ |
| 278 |
|
COLOR acol, caustic; |
| 279 |
< |
int ok; |
| 279 |
> |
int i, ok; |
| 280 |
|
double d, l; |
| 281 |
|
|
| 282 |
|
/* PMAP: Factor in ambient from photon map, if enabled and ray is |
| 302 |
|
goto dumbamb; |
| 303 |
|
|
| 304 |
|
if (ambacc <= FTINY) { /* no ambient storage */ |
| 305 |
+ |
FVECT uvd[2]; |
| 306 |
+ |
float dgrad[2], *dgp = NULL; |
| 307 |
+ |
|
| 308 |
+ |
if (nrm != r->ron && DOT(nrm,r->ron) < 0.9999) |
| 309 |
+ |
dgp = dgrad; /* compute rotational grad. */ |
| 310 |
|
copycolor(acol, aval); |
| 311 |
|
rdepth++; |
| 312 |
|
ok = doambient(acol, r, r->rweight, |
| 313 |
< |
NULL, NULL, NULL, NULL, NULL); |
| 313 |
> |
uvd, NULL, NULL, dgp, NULL); |
| 314 |
|
rdepth--; |
| 315 |
|
if (!ok) |
| 316 |
|
goto dumbamb; |
| 317 |
+ |
if ((ok > 0) & (dgp != NULL)) { /* apply texture */ |
| 318 |
+ |
FVECT v1; |
| 319 |
+ |
VCROSS(v1, r->ron, nrm); |
| 320 |
+ |
d = 1.0; |
| 321 |
+ |
for (i = 3; i--; ) |
| 322 |
+ |
d += v1[i] * (dgp[0]*uvd[0][i] + dgp[1]*uvd[1][i]); |
| 323 |
+ |
if (d >= 0.05) |
| 324 |
+ |
scalecolor(acol, d); |
| 325 |
+ |
} |
| 326 |
|
copycolor(aval, acol); |
| 327 |
|
|
| 328 |
|
/* PMAP: add in caustic */ |
| 1327 |
|
if ((flen = lseek(fileno(ambfp), (off_t)0, SEEK_END)) < 0) |
| 1328 |
|
goto seekerr; |
| 1329 |
|
if ((n = flen - lastpos) > 0) { /* file has grown */ |
| 1330 |
< |
if (ambinp == NULL) { /* use duplicate filedes */ |
| 1331 |
< |
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
| 1330 |
> |
if (ambinp == NULL) { /* get new file pointer */ |
| 1331 |
> |
ambinp = fopen(ambfile, "rb"); |
| 1332 |
|
if (ambinp == NULL) |
| 1333 |
< |
error(SYSTEM, "fdopen failed in ambsync"); |
| 1333 |
> |
error(SYSTEM, "fopen failed in ambsync"); |
| 1334 |
|
} |
| 1335 |
|
if (fseek(ambinp, lastpos, SEEK_SET) < 0) |
| 1336 |
|
goto seekerr; |
| 1345 |
|
avstore(&avs); |
| 1346 |
|
n -= AMBVALSIZ; |
| 1347 |
|
} |
| 1348 |
< |
lastpos = flen - n; |
| 1349 |
< |
/*** seek always as safety measure |
| 1350 |
< |
if (n) ***/ /* alignment */ |
| 1337 |
< |
if (lseek(fileno(ambfp), (off_t)lastpos, SEEK_SET) < 0) |
| 1338 |
< |
goto seekerr; |
| 1348 |
> |
lastpos = flen - n; /* check alignment */ |
| 1349 |
> |
if (n && lseek(fileno(ambfp), (off_t)lastpos, SEEK_SET) < 0) |
| 1350 |
> |
goto seekerr; |
| 1351 |
|
} |
| 1352 |
|
n = fflush(ambfp); /* calls write() at last */ |
| 1353 |
< |
if (n != EOF) |
| 1342 |
< |
lastpos += (long)nunflshed*AMBVALSIZ; |
| 1343 |
< |
else if ((lastpos = lseek(fileno(ambfp), (off_t)0, SEEK_CUR)) < 0) |
| 1344 |
< |
goto seekerr; |
| 1345 |
< |
|
| 1353 |
> |
lastpos += (long)nunflshed*AMBVALSIZ; |
| 1354 |
|
aflock(F_UNLCK); /* release file */ |
| 1355 |
|
nunflshed = 0; |
| 1356 |
|
return(n); |
| 1357 |
|
seekerr: |
| 1358 |
|
error(SYSTEM, "seek failed in ambsync"); |
| 1359 |
< |
return -1; /* pro forma return */ |
| 1359 |
> |
return(EOF); /* pro forma return */ |
| 1360 |
|
} |
| 1361 |
|
|
| 1362 |
|
#else /* ! F_SETLKW */ |
