9 |
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*/ |
10 |
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|
11 |
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#include "ray.h" |
12 |
+ |
#include "platform.h" |
13 |
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#include "source.h" |
14 |
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#include "view.h" |
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#include "random.h" |
16 |
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|
17 |
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#define DEGREE (PI/180.) |
18 |
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|
19 |
< |
#define MAXNT 180 /* maximum number of theta divisions */ |
19 |
> |
#define MAXNT 181 /* maximum number of theta divisions */ |
20 |
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#define MAXNP 360 /* maximum number of phi divisions */ |
21 |
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|
22 |
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extern char *progname; /* global argv[0] */ |
27 |
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1.,180.,180.,0.,0.,0.,0., |
28 |
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{0.,0.,0.},{0.,0.,0.},0.,0.}; |
29 |
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|
30 |
< |
unsigned long nsamps = 10000; /* desired number of initial samples */ |
30 |
< |
unsigned long nssamps = 9000; /* number of super-samples */ |
30 |
> |
long nsamps = 10000; /* desired number of initial samples */ |
31 |
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int ndsamps = 32; /* number of direct samples */ |
32 |
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int nprocs = 1; /* number of rendering processes */ |
33 |
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|
34 |
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float *sensor = NULL; /* current sensor data */ |
35 |
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int sntp[2]; /* number of sensor theta and phi angles */ |
36 |
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float maxtheta; /* maximum theta value for this sensor */ |
37 |
< |
float tvals[MAXNT+1]; /* theta values (1-D table of 1-cos(t)) */ |
38 |
< |
float *pvals = NULL; /* phi values (2-D table in radians) */ |
37 |
> |
float tvals[MAXNT+1]; /* theta prob. values (1-D table of 1-cos(t)) */ |
38 |
> |
float *pvals = NULL; /* phi prob. values (2-D table in radians) */ |
39 |
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int ntheta = 0; /* polar angle divisions */ |
40 |
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int nphi = 0; /* azimuthal angle divisions */ |
41 |
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double gscale = 1.; /* global scaling value */ |
59 |
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over_options(); |
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printf("-n %-9d\t\t\t# number of processes\n", nprocs); |
61 |
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printf("-rd %-9ld\t\t\t# ray directions\n", nsamps); |
62 |
– |
/* printf("-rs %-9ld\t\t\t# ray super-samples\n", nssamps); */ |
62 |
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printf("-dn %-9d\t\t\t# direct number of samples\n", ndsamps); |
63 |
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printf("-vp %f %f %f\t# view point\n", |
64 |
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ourview.vp[0], ourview.vp[1], ourview.vp[2]); |
76 |
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int ec; |
77 |
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{ |
78 |
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if (ray_pnprocs > 0) /* close children if any */ |
79 |
< |
ray_pclose(0); |
79 |
> |
ray_pclose(0); |
80 |
> |
else if (ray_pnprocs < 0) |
81 |
> |
_exit(ec); /* avoid flush in child */ |
82 |
|
exit(ec); |
83 |
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} |
84 |
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|
130 |
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if (argv[i][1] == 'r') { /* sampling options */ |
131 |
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if (argv[i][2] == 'd') |
132 |
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nsamps = atol(argv[++i]); |
132 |
– |
else if (argv[i][2] == 's') |
133 |
– |
nssamps = atol(argv[++i]); |
133 |
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else { |
134 |
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sprintf(errmsg, "bad option at '%s'", argv[i]); |
135 |
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error(USER, errmsg); |
206 |
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char *sfile |
207 |
|
) |
208 |
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{ |
209 |
+ |
int warnedneg; |
210 |
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char linebuf[8192]; |
211 |
+ |
int last_pos_val = 0; |
212 |
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int nelem = 1000; |
213 |
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float *sarr = (float *)malloc(sizeof(float)*nelem); |
214 |
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FILE *fp; |
236 |
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cp = fskip(cp); |
237 |
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if (cp == NULL) |
238 |
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break; |
239 |
+ |
if (ntp[1] > 1 && sarr[ntp[1]+1] <= sarr[ntp[1]]+FTINY) { |
240 |
+ |
sprintf(errmsg, |
241 |
+ |
"Phi values not monotinically increasing in sensor file '%s'", |
242 |
+ |
sfile); |
243 |
+ |
error(USER, errmsg); |
244 |
+ |
} |
245 |
|
++ntp[1]; |
246 |
|
} |
247 |
+ |
warnedneg = 0; |
248 |
|
ntp[0] = 0; /* get thetas + data */ |
249 |
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while (fgets(linebuf, sizeof(linebuf), fp) != NULL) { |
250 |
|
++ntp[0]; |
262 |
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cp = fskip(cp); |
263 |
|
if (cp == NULL) |
264 |
|
break; |
265 |
+ |
if (sarr[i] < .0) { |
266 |
+ |
if (!warnedneg++) { |
267 |
+ |
sprintf(errmsg, |
268 |
+ |
"Negative value(s) in sensor file '%s' (ignored)\n", sfile); |
269 |
+ |
error(WARNING, errmsg); |
270 |
+ |
} |
271 |
+ |
sarr[i] = .0; |
272 |
+ |
} else if (sarr[i] > FTINY && i > ntp[0]*(ntp[1]+1)) |
273 |
+ |
last_pos_val = i; |
274 |
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++i; |
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} |
276 |
< |
if (i == ntp[0]*(ntp[1]+1)) |
276 |
> |
if (i == ntp[0]*(ntp[1]+1)) /* empty line? */ |
277 |
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break; |
278 |
+ |
if (ntp[0] > 1 && sarr[ntp[0]*(ntp[1]+1)] <= |
279 |
+ |
sarr[(ntp[0]-1)*(ntp[1]+1)]) { |
280 |
+ |
sprintf(errmsg, |
281 |
+ |
"Theta values not monotinically increasing in sensor file '%s'", |
282 |
+ |
sfile); |
283 |
+ |
error(USER, errmsg); |
284 |
+ |
} |
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if (i != (ntp[0]+1)*(ntp[1]+1)) { |
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sprintf(errmsg, |
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"bad column count near line %d in sensor file '%s'", |
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error(USER, errmsg); |
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} |
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} |
292 |
< |
nelem = i; |
292 |
> |
/* truncate zero region */ |
293 |
> |
ntp[0] = (last_pos_val + ntp[1])/(ntp[1]+1) - 1; |
294 |
> |
nelem = (ntp[0]+1)*(ntp[1]+1); |
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fclose(fp); |
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errmsg[0] = '\0'; /* sanity checks */ |
297 |
< |
if (ntp[0] <= 0) |
298 |
< |
sprintf(errmsg, "no data in sensor file '%s'", sfile); |
297 |
> |
if (!last_pos_val) |
298 |
> |
sprintf(errmsg, "no positive sensor values in file '%s'", sfile); |
299 |
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else if (fabs(sarr[ntp[1]+1]) > FTINY) |
300 |
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sprintf(errmsg, "minimum theta must be 0 in sensor file '%s'", |
301 |
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sfile); |
302 |
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else if (fabs(sarr[1]) > FTINY) |
303 |
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sprintf(errmsg, "minimum phi must be 0 in sensor file '%s'", |
304 |
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sfile); |
305 |
< |
else if (sarr[ntp[1]] <= FTINY) |
305 |
> |
else if (sarr[ntp[1]] < 270.-FTINY) |
306 |
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sprintf(errmsg, |
307 |
< |
"maximum phi must be positive in sensor file '%s'", |
307 |
> |
"maximum phi must be 270 or greater in sensor file '%s'", |
308 |
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sfile); |
309 |
< |
else if (sarr[ntp[0]*(ntp[1]+1)] <= FTINY) |
309 |
> |
else if (sarr[ntp[1]] >= 360.-FTINY) |
310 |
|
sprintf(errmsg, |
311 |
< |
"maximum theta must be positive in sensor file '%s'", |
311 |
> |
"maximum phi must be less than 360 in sensor file '%s'", |
312 |
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sfile); |
313 |
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if (errmsg[0]) |
314 |
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error(USER, errmsg); |
321 |
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char *sfile |
322 |
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) |
323 |
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{ |
324 |
< |
int samptot = nsamps; |
324 |
> |
long samptot = nsamps; |
325 |
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float *rowp, *rowp1; |
326 |
|
double rowsum[MAXNT], rowomega[MAXNT]; |
327 |
|
double thdiv[MAXNT+1], phdiv[MAXNP+1]; |
353 |
|
error(INTERNAL, errmsg); |
354 |
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} |
355 |
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/* compute boundary angles */ |
356 |
< |
maxtheta = 1.5f*s_theta(sntp[0]-1) - 0.5f*s_theta(sntp[0]-2); |
356 |
> |
maxtheta = DEGREE*(1.5f*s_theta(sntp[0]-1) - 0.5f*s_theta(sntp[0]-2)); |
357 |
> |
if (maxtheta > PI) |
358 |
> |
maxtheta = PI; |
359 |
|
thdiv[0] = .0; |
360 |
|
for (t = 1; t < sntp[0]; t++) |
361 |
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thdiv[t] = DEGREE/2.*(s_theta(t-1) + s_theta(t)); |
362 |
< |
thdiv[sntp[0]] = maxtheta*DEGREE; |
363 |
< |
phdiv[0] = .0; |
362 |
> |
thdiv[sntp[0]] = maxtheta; |
363 |
> |
phdiv[0] = DEGREE*(1.5f*s_phi(0) - 0.5f*s_phi(1)); |
364 |
|
for (p = 1; p < sntp[1]; p++) |
365 |
|
phdiv[p] = DEGREE/2.*(s_phi(p-1) + s_phi(p)); |
366 |
< |
phdiv[sntp[1]] = 2.*PI; |
366 |
> |
phdiv[sntp[1]] = DEGREE*(1.5f*s_phi(sntp[1]-1) - 0.5f*s_phi(sntp[1]-2)); |
367 |
|
/* size our table */ |
368 |
< |
tsize = 1. - cos(maxtheta*DEGREE); |
369 |
< |
psize = PI*tsize/(maxtheta*DEGREE); |
368 |
> |
tsize = 1. - cos(maxtheta); |
369 |
> |
psize = PI*tsize/maxtheta; |
370 |
|
if (sntp[0]*sntp[1] < samptot) /* don't overdo resolution */ |
371 |
|
samptot = sntp[0]*sntp[1]; |
372 |
< |
ntheta = (int)(sqrt((double)samptot*tsize/psize) + 0.5); |
372 |
> |
ntheta = (int)(sqrt((double)samptot*tsize/psize)*sntp[0]/sntp[1]) + 1; |
373 |
|
if (ntheta > MAXNT) |
374 |
|
ntheta = MAXNT; |
375 |
|
nphi = samptot/ntheta; |
376 |
< |
pvals = (float *)malloc(sizeof(float)*ntheta*(nphi+1)); |
376 |
> |
pvals = (float *)malloc(sizeof(float)*(ntheta+1)*(nphi+1)); |
377 |
|
if (pvals == NULL) |
378 |
|
error(SYSTEM, "out of memory in init_ptable()"); |
379 |
|
gscale = .0; /* compute our inverse table */ |
380 |
|
for (i = 0; i < sntp[0]; i++) { |
381 |
|
rowp = &s_val(i,0); |
382 |
< |
rowsum[i] = 0.; |
382 |
> |
rowsum[i] = 1e-20; |
383 |
|
for (j = 0; j < sntp[1]; j++) |
384 |
|
rowsum[i] += *rowp++; |
385 |
|
rowomega[i] = cos(thdiv[i]) - cos(thdiv[i+1]); |
386 |
|
rowomega[i] *= 2.*PI / (double)sntp[1]; |
387 |
|
gscale += rowsum[i] * rowomega[i]; |
388 |
|
} |
389 |
+ |
if (gscale <= FTINY) { |
390 |
+ |
sprintf(errmsg, "Sensor values sum to zero in file '%s'", sfile); |
391 |
+ |
error(USER, errmsg); |
392 |
+ |
} |
393 |
|
for (i = 0; i < ntheta; i++) { |
394 |
|
prob = (double)i / (double)ntheta; |
395 |
|
for (t = 0; t < sntp[0]; t++) |
401 |
|
tvals[i] = 1. - ( (1.-frac)*cos(thdiv[t]) + |
402 |
|
frac*cos(thdiv[t+1]) ); |
403 |
|
/* offset b/c sensor values are centered */ |
404 |
< |
if (t <= 0 || frac > 0.5) |
404 |
> |
if ((t < sntp[0]-1) & (!t | (frac >= 0.5))) { |
405 |
|
frac -= 0.5; |
406 |
< |
else if (t >= sntp[0]-1 || frac < 0.5) { |
406 |
> |
} else { |
407 |
|
frac += 0.5; |
408 |
|
--t; |
409 |
|
} |
410 |
< |
pvals[i*(nphi+1)] = .0f; |
410 |
> |
pvals[i*(nphi+1)] = phdiv[0]; |
411 |
|
for (j = 1; j < nphi; j++) { |
412 |
|
prob = (double)j / (double)nphi; |
413 |
|
rowp = &s_val(t,0); |
414 |
|
rowp1 = &s_val(t+1,0); |
415 |
< |
for (p = 0; p < sntp[1]; p++) { |
415 |
> |
for (p = 0; p < sntp[1]; p++) |
416 |
|
if ((prob -= (1.-frac)*rowp[p]/rowsum[t] + |
417 |
|
frac*rowp1[p]/rowsum[t+1]) <= .0) |
418 |
|
break; |
419 |
< |
if (p >= sntp[1]) |
420 |
< |
error(INTERNAL, |
421 |
< |
"code error 2 in init_ptable()"); |
390 |
< |
frac1 = 1. + prob/((1.-frac)*rowp[p]/rowsum[t] |
391 |
< |
+ frac*rowp1[p]/rowsum[t+1]); |
392 |
< |
pvals[i*(nphi+1) + j] = (1.-frac1)*phdiv[p] + |
393 |
< |
frac1*phdiv[p+1]; |
419 |
> |
if (p >= sntp[1]) { /* should never happen? */ |
420 |
> |
p = sntp[1] - 1; |
421 |
> |
prob = .5; |
422 |
|
} |
423 |
+ |
frac1 = 1. + prob/((1.-frac)*rowp[p]/rowsum[t] |
424 |
+ |
+ frac*rowp1[p]/rowsum[t+1]); |
425 |
+ |
pvals[i*(nphi+1) + j] = (1.-frac1)*phdiv[p] + |
426 |
+ |
frac1*phdiv[p+1]; |
427 |
|
} |
428 |
< |
pvals[i*(nphi+1) + nphi] = (float)(2.*PI); |
428 |
> |
pvals[i*(nphi+1) + nphi] = phdiv[sntp[1]]; |
429 |
|
} |
430 |
+ |
/* duplicate final row */ |
431 |
+ |
memcpy(pvals+ntheta*(nphi+1), pvals+(ntheta-1)*(nphi+1), |
432 |
+ |
sizeof(*pvals)*(nphi+1)); |
433 |
|
tvals[0] = .0f; |
434 |
|
tvals[ntheta] = (float)tsize; |
435 |
|
} |
476 |
|
int t, p; |
477 |
|
|
478 |
|
dv[2] = DOT(dvec, ourview.vdir); |
479 |
< |
theta = (float)((1./DEGREE) * acos(dv[2])); |
479 |
> |
theta = acos(dv[2]); |
480 |
|
if (theta >= maxtheta) |
481 |
|
return(.0f); |
482 |
|
dv[0] = DOT(dvec, ourview.hvec); |
483 |
|
dv[1] = DOT(dvec, ourview.vvec); |
484 |
< |
phi = (float)((1./DEGREE) * atan2(-dv[0], dv[1])); |
485 |
< |
while (phi < .0f) phi += 360.f; |
484 |
> |
phi = atan2(-dv[0], dv[1]); |
485 |
> |
while (phi < .0f) phi += (float)(2.*PI); |
486 |
|
t = (int)(theta/maxtheta * sntp[0]); |
487 |
< |
p = (int)(phi*(1./360.) * sntp[1]); |
487 |
> |
p = (int)(phi*(1./(2.*PI)) * sntp[1]); |
488 |
|
/* hack for non-uniform sensor grid */ |
489 |
+ |
theta *= (float)(1./DEGREE); |
490 |
+ |
phi *= (float)(1./DEGREE); |
491 |
|
while (t+1 < sntp[0] && theta >= s_theta(t+1)) |
492 |
|
++t; |
493 |
|
while (t-1 >= 0 && theta <= s_theta(t-1)) |
550 |
|
continue; |
551 |
|
} |
552 |
|
rr.rmax = .0; |
553 |
< |
rayorigin(&rr, PRIMARY, NULL, NULL); |
553 |
> |
rayorigin(&rr, PRIMARY|SPECULAR, NULL, NULL); |
554 |
|
scalecolor(rr.rcoef, sf); |
555 |
|
if (ray_pqueue(&rr) == 1) |
556 |
|
addcolor(vsum, rr.rcol); |
566 |
|
continue; |
567 |
|
} |
568 |
|
rr.rmax = .0; |
569 |
< |
rayorigin(&rr, PRIMARY, NULL, NULL); |
569 |
> |
rayorigin(&rr, PRIMARY|SPECULAR, NULL, NULL); |
570 |
|
scalecolor(rr.rcoef, sf); |
571 |
|
if (ray_pqueue(&rr) == 1) |
572 |
|
addcolor(vsum, rr.rcol); |