| 9 |
|
*/ |
| 10 |
|
|
| 11 |
|
#include "ray.h" |
| 12 |
+ |
#include "platform.h" |
| 13 |
|
#include "source.h" |
| 14 |
|
#include "view.h" |
| 15 |
|
#include "random.h" |
| 16 |
|
|
| 17 |
|
#define DEGREE (PI/180.) |
| 18 |
|
|
| 19 |
< |
#define MAXNT 180 /* maximum number of theta divisions */ |
| 19 |
> |
#define MAXNT 181 /* maximum number of theta divisions */ |
| 20 |
|
#define MAXNP 360 /* maximum number of phi divisions */ |
| 21 |
|
|
| 22 |
|
extern char *progname; /* global argv[0] */ |
| 23 |
|
extern int nowarn; /* don't report warnings? */ |
| 24 |
|
|
| 25 |
|
/* current sensor's perspective */ |
| 26 |
< |
VIEW ourview = STDVIEW; |
| 26 |
> |
VIEW ourview = {VT_ANG,{0.,0.,0.},{0.,0.,1.},{1.,0.,0.}, |
| 27 |
> |
1.,180.,180.,0.,0.,0.,0., |
| 28 |
> |
{0.,0.,0.},{0.,0.,0.},0.,0.}; |
| 29 |
|
|
| 30 |
|
unsigned long nsamps = 10000; /* desired number of initial samples */ |
| 31 |
|
unsigned long nssamps = 9000; /* number of super-samples */ |
| 32 |
< |
int ndsamps = 16; /* number of direct samples */ |
| 32 |
> |
int ndsamps = 32; /* number of direct samples */ |
| 33 |
|
int nprocs = 1; /* number of rendering processes */ |
| 34 |
|
|
| 35 |
|
float *sensor = NULL; /* current sensor data */ |
| 36 |
|
int sntp[2]; /* number of sensor theta and phi angles */ |
| 37 |
|
float maxtheta; /* maximum theta value for this sensor */ |
| 38 |
< |
float tvals[MAXNT+1]; /* theta values (1-D table of 1-cos(t)) */ |
| 39 |
< |
float *pvals = NULL; /* phi values (2-D table in radians) */ |
| 38 |
> |
float tvals[MAXNT+1]; /* theta prob. values (1-D table of 1-cos(t)) */ |
| 39 |
> |
float *pvals = NULL; /* phi prob. values (2-D table in radians) */ |
| 40 |
|
int ntheta = 0; /* polar angle divisions */ |
| 41 |
|
int nphi = 0; /* azimuthal angle divisions */ |
| 42 |
|
double gscale = 1.; /* global scaling value */ |
| 43 |
|
|
| 44 |
+ |
#define s_theta(t) sensor[(t+1)*(sntp[1]+1)] |
| 45 |
+ |
#define s_phi(p) sensor[(p)+1] |
| 46 |
+ |
#define s_val(t,p) sensor[(p)+1+(t+1)*(sntp[1]+1)] |
| 47 |
+ |
|
| 48 |
|
static void comp_sensor(char *sfile); |
| 49 |
|
|
| 50 |
|
static void |
| 51 |
< |
print_defaults() |
| 51 |
> |
over_options() /* overriding options */ |
| 52 |
|
{ |
| 53 |
+ |
directvis = (ndsamps <= 0); |
| 54 |
+ |
do_irrad = 0; |
| 55 |
+ |
} |
| 56 |
+ |
|
| 57 |
+ |
static void |
| 58 |
+ |
print_defaults() /* print out default parameters */ |
| 59 |
+ |
{ |
| 60 |
+ |
over_options(); |
| 61 |
|
printf("-n %-9d\t\t\t# number of processes\n", nprocs); |
| 62 |
|
printf("-rd %-9ld\t\t\t# ray directions\n", nsamps); |
| 63 |
|
/* printf("-rs %-9ld\t\t\t# ray super-samples\n", nssamps); */ |
| 72 |
|
print_rdefaults(); |
| 73 |
|
} |
| 74 |
|
|
| 75 |
+ |
|
| 76 |
+ |
void |
| 77 |
+ |
quit(ec) /* make sure exit is called */ |
| 78 |
+ |
int ec; |
| 79 |
+ |
{ |
| 80 |
+ |
if (ray_pnprocs > 0) /* close children if any */ |
| 81 |
+ |
ray_pclose(0); |
| 82 |
+ |
else if (ray_pnprocs < 0) |
| 83 |
+ |
_exit(ec); /* avoid flush in child */ |
| 84 |
+ |
exit(ec); |
| 85 |
+ |
} |
| 86 |
+ |
|
| 87 |
+ |
|
| 88 |
|
int |
| 89 |
|
main( |
| 90 |
|
int argc, |
| 92 |
|
) |
| 93 |
|
{ |
| 94 |
|
int doheader = 1; |
| 95 |
+ |
int optwarn = 0; |
| 96 |
|
int i, rval; |
| 97 |
|
|
| 98 |
|
progname = argv[0]; |
| 99 |
|
/* set up rendering defaults */ |
| 100 |
< |
dstrsrc = 0.25; |
| 100 |
> |
rand_samp = 1; |
| 101 |
> |
dstrsrc = 0.65; |
| 102 |
> |
srcsizerat = 0.1; |
| 103 |
|
directrelay = 3; |
| 104 |
|
ambounce = 1; |
| 105 |
< |
/* just asking defaults? */ |
| 75 |
< |
if (argc == 2 && !strcmp(argv[1], "-defaults")) { |
| 76 |
< |
print_defaults(); |
| 77 |
< |
return(0); |
| 78 |
< |
} |
| 79 |
< |
/* check octree */ |
| 80 |
< |
if (argc < 2 || argv[argc-1][0] == '-') |
| 81 |
< |
error(USER, "missing octree argument"); |
| 105 |
> |
maxdepth = -10; |
| 106 |
|
/* get options from command line */ |
| 107 |
< |
for (i = 1; i < argc-1; i++) { |
| 107 |
> |
for (i = 1; i < argc; i++) { |
| 108 |
|
while ((rval = expandarg(&argc, &argv, i)) > 0) |
| 109 |
|
; |
| 110 |
|
if (rval < 0) { |
| 111 |
|
sprintf(errmsg, "cannot expand '%s'", argv[i]); |
| 112 |
|
error(SYSTEM, errmsg); |
| 113 |
|
} |
| 114 |
< |
if (argv[i][0] != '-') { /* process a sensor file */ |
| 114 |
> |
if (argv[i][0] != '-') { |
| 115 |
> |
if (i >= argc-1) |
| 116 |
> |
break; /* final octree argument */ |
| 117 |
|
if (!ray_pnprocs) { |
| 118 |
< |
/* overriding options */ |
| 93 |
< |
directvis = (ndsamps <= 0); |
| 94 |
< |
do_irrad = 0; |
| 118 |
> |
over_options(); |
| 119 |
|
if (doheader) { /* print header */ |
| 120 |
+ |
newheader("RADIANCE", stdout); |
| 121 |
|
printargs(argc, argv, stdout); |
| 122 |
|
fputformat("ascii", stdout); |
| 123 |
|
putchar('\n'); |
| 124 |
|
} |
| 125 |
|
/* start process(es) */ |
| 126 |
< |
ray_pinit(argv[argc-1], nprocs); |
| 126 |
> |
if (strcmp(argv[argc-1], ".")) |
| 127 |
> |
ray_pinit(argv[argc-1], nprocs); |
| 128 |
|
} |
| 129 |
< |
comp_sensor(argv[i]); |
| 129 |
> |
comp_sensor(argv[i]); /* process a sensor file */ |
| 130 |
|
continue; |
| 131 |
|
} |
| 132 |
|
if (argv[i][1] == 'r') { /* sampling options */ |
| 169 |
|
sprintf(errmsg, "bad view option at '%s'", argv[i]); |
| 170 |
|
error(USER, errmsg); |
| 171 |
|
} |
| 172 |
< |
if (!strcmp(argv[i], "-w")) { /* turn off warnings */ |
| 173 |
< |
nowarn = 1; |
| 172 |
> |
if (!strcmp(argv[i], "-w")) { /* toggle warnings */ |
| 173 |
> |
nowarn = !nowarn; |
| 174 |
|
continue; |
| 175 |
|
} |
| 176 |
|
if (ray_pnprocs) { |
| 177 |
< |
error(WARNING, |
| 177 |
> |
if (!optwarn++) |
| 178 |
> |
error(WARNING, |
| 179 |
|
"rendering options should appear before first sensor"); |
| 180 |
|
} else if (!strcmp(argv[i], "-defaults")) { |
| 181 |
|
print_defaults(); |
| 198 |
|
} |
| 199 |
|
i += rval; |
| 200 |
|
} |
| 201 |
+ |
if (sensor == NULL) |
| 202 |
+ |
error(USER, i<argc ? "missing sensor file" : "missing octree"); |
| 203 |
|
quit(0); |
| 204 |
|
} |
| 205 |
|
|
| 210 |
|
char *sfile |
| 211 |
|
) |
| 212 |
|
{ |
| 213 |
+ |
int warnedneg; |
| 214 |
|
char linebuf[8192]; |
| 215 |
+ |
int last_pos_val = 0; |
| 216 |
|
int nelem = 1000; |
| 217 |
|
float *sarr = (float *)malloc(sizeof(float)*nelem); |
| 218 |
|
FILE *fp; |
| 240 |
|
cp = fskip(cp); |
| 241 |
|
if (cp == NULL) |
| 242 |
|
break; |
| 243 |
+ |
if (ntp[1] > 1 && sarr[ntp[1]+1] <= sarr[ntp[1]]+FTINY) { |
| 244 |
+ |
sprintf(errmsg, |
| 245 |
+ |
"Phi values not monotinically increasing in sensor file '%s'", |
| 246 |
+ |
sfile); |
| 247 |
+ |
error(USER, errmsg); |
| 248 |
+ |
} |
| 249 |
|
++ntp[1]; |
| 250 |
|
} |
| 251 |
+ |
warnedneg = 0; |
| 252 |
|
ntp[0] = 0; /* get thetas + data */ |
| 253 |
|
while (fgets(linebuf, sizeof(linebuf), fp) != NULL) { |
| 254 |
|
++ntp[0]; |
| 266 |
|
cp = fskip(cp); |
| 267 |
|
if (cp == NULL) |
| 268 |
|
break; |
| 269 |
+ |
if (sarr[i] < .0) { |
| 270 |
+ |
if (!warnedneg++) { |
| 271 |
+ |
sprintf(errmsg, |
| 272 |
+ |
"Negative value(s) in sensor file '%s' (ignored)\n", sfile); |
| 273 |
+ |
error(WARNING, errmsg); |
| 274 |
+ |
} |
| 275 |
+ |
sarr[i] = .0; |
| 276 |
+ |
} else if (sarr[i] > FTINY && i > ntp[0]*(ntp[1]+1)) |
| 277 |
+ |
last_pos_val = i; |
| 278 |
|
++i; |
| 279 |
|
} |
| 280 |
< |
if (i == ntp[0]*(ntp[1]+1)) |
| 280 |
> |
if (i == ntp[0]*(ntp[1]+1)) /* empty line? */ |
| 281 |
|
break; |
| 282 |
+ |
if (ntp[0] > 1 && sarr[ntp[0]*(ntp[1]+1)] <= |
| 283 |
+ |
sarr[(ntp[0]-1)*(ntp[1]+1)]) { |
| 284 |
+ |
sprintf(errmsg, |
| 285 |
+ |
"Theta values not monotinically increasing in sensor file '%s'", |
| 286 |
+ |
sfile); |
| 287 |
+ |
error(USER, errmsg); |
| 288 |
+ |
} |
| 289 |
|
if (i != (ntp[0]+1)*(ntp[1]+1)) { |
| 290 |
|
sprintf(errmsg, |
| 291 |
|
"bad column count near line %d in sensor file '%s'", |
| 293 |
|
error(USER, errmsg); |
| 294 |
|
} |
| 295 |
|
} |
| 296 |
< |
nelem = i; |
| 296 |
> |
/* truncate zero region */ |
| 297 |
> |
ntp[0] = (last_pos_val + ntp[1])/(ntp[1]+1) - 1; |
| 298 |
> |
nelem = (ntp[0]+1)*(ntp[1]+1); |
| 299 |
|
fclose(fp); |
| 300 |
|
errmsg[0] = '\0'; /* sanity checks */ |
| 301 |
< |
if (ntp[0] <= 0) |
| 302 |
< |
sprintf(errmsg, "no data in sensor file '%s'", sfile); |
| 301 |
> |
if (!last_pos_val) |
| 302 |
> |
sprintf(errmsg, "no positive sensor values in file '%s'", sfile); |
| 303 |
|
else if (fabs(sarr[ntp[1]+1]) > FTINY) |
| 304 |
|
sprintf(errmsg, "minimum theta must be 0 in sensor file '%s'", |
| 305 |
|
sfile); |
| 306 |
|
else if (fabs(sarr[1]) > FTINY) |
| 307 |
|
sprintf(errmsg, "minimum phi must be 0 in sensor file '%s'", |
| 308 |
|
sfile); |
| 309 |
< |
else if (sarr[ntp[1]] <= FTINY) |
| 309 |
> |
else if (sarr[ntp[1]] < 270.-FTINY) |
| 310 |
|
sprintf(errmsg, |
| 311 |
< |
"maximum phi must be positive in sensor file '%s'", |
| 311 |
> |
"maximum phi must be 270 or greater in sensor file '%s'", |
| 312 |
|
sfile); |
| 313 |
< |
else if (sarr[ntp[0]*(ntp[1]+1)] <= FTINY) |
| 313 |
> |
else if (sarr[ntp[1]] >= 360.-FTINY) |
| 314 |
|
sprintf(errmsg, |
| 315 |
< |
"maximum theta must be positive in sensor file '%s'", |
| 315 |
> |
"maximum phi must be less than 360 in sensor file '%s'", |
| 316 |
|
sfile); |
| 317 |
|
if (errmsg[0]) |
| 318 |
|
error(USER, errmsg); |
| 338 |
|
if (pvals != NULL) |
| 339 |
|
free((void *)pvals); |
| 340 |
|
if (sfile == NULL || !*sfile) { |
| 341 |
+ |
sensor = NULL; |
| 342 |
+ |
sntp[0] = sntp[1] = 0; |
| 343 |
|
pvals = NULL; |
| 344 |
|
ntheta = nphi = 0; |
| 345 |
|
return; |
| 357 |
|
error(INTERNAL, errmsg); |
| 358 |
|
} |
| 359 |
|
/* compute boundary angles */ |
| 360 |
< |
maxtheta = 1.5f*sensor[sntp[0]*(sntp[1]+1)] - |
| 361 |
< |
0.5f*sensor[sntp[0]*sntp[1]]; |
| 360 |
> |
maxtheta = DEGREE*(1.5f*s_theta(sntp[0]-1) - 0.5f*s_theta(sntp[0]-2)); |
| 361 |
> |
if (maxtheta > PI) |
| 362 |
> |
maxtheta = PI; |
| 363 |
|
thdiv[0] = .0; |
| 364 |
|
for (t = 1; t < sntp[0]; t++) |
| 365 |
< |
thdiv[t] = DEGREE/2.*(sensor[t*(sntp[1]+1)] + |
| 366 |
< |
sensor[(t+1)*(sntp[1]+1)]); |
| 367 |
< |
thdiv[sntp[0]] = maxtheta*DEGREE; |
| 309 |
< |
phdiv[0] = .0; |
| 365 |
> |
thdiv[t] = DEGREE/2.*(s_theta(t-1) + s_theta(t)); |
| 366 |
> |
thdiv[sntp[0]] = maxtheta; |
| 367 |
> |
phdiv[0] = DEGREE*(1.5f*s_phi(0) - 0.5f*s_phi(1)); |
| 368 |
|
for (p = 1; p < sntp[1]; p++) |
| 369 |
< |
phdiv[p] = DEGREE/2.*(sensor[p] + sensor[p+1]); |
| 370 |
< |
phdiv[sntp[1]] = 2.*PI; |
| 369 |
> |
phdiv[p] = DEGREE/2.*(s_phi(p-1) + s_phi(p)); |
| 370 |
> |
phdiv[sntp[1]] = DEGREE*(1.5f*s_phi(sntp[1]-1) - 0.5f*s_phi(sntp[1]-2)); |
| 371 |
|
/* size our table */ |
| 372 |
< |
tsize = 1. - cos(maxtheta*DEGREE); |
| 372 |
> |
tsize = 1. - cos(maxtheta); |
| 373 |
|
psize = PI*tsize/maxtheta; |
| 374 |
|
if (sntp[0]*sntp[1] < samptot) /* don't overdo resolution */ |
| 375 |
|
samptot = sntp[0]*sntp[1]; |
| 376 |
< |
ntheta = (int)(sqrt(samptot*tsize/psize) + 0.5); |
| 376 |
> |
ntheta = (int)(sqrt((double)samptot*tsize/psize)*sntp[0]/sntp[1]) + 1; |
| 377 |
|
if (ntheta > MAXNT) |
| 378 |
|
ntheta = MAXNT; |
| 379 |
|
nphi = samptot/ntheta; |
| 380 |
< |
pvals = (float *)malloc(sizeof(float)*ntheta*(nphi+1)); |
| 380 |
> |
pvals = (float *)malloc(sizeof(float)*(ntheta+1)*(nphi+1)); |
| 381 |
|
if (pvals == NULL) |
| 382 |
|
error(SYSTEM, "out of memory in init_ptable()"); |
| 383 |
|
gscale = .0; /* compute our inverse table */ |
| 384 |
|
for (i = 0; i < sntp[0]; i++) { |
| 385 |
< |
rowp = sensor + (i+1)*(sntp[1]+1) + 1; |
| 386 |
< |
rowsum[i] = 0.; |
| 385 |
> |
rowp = &s_val(i,0); |
| 386 |
> |
rowsum[i] = 1e-20; |
| 387 |
|
for (j = 0; j < sntp[1]; j++) |
| 388 |
|
rowsum[i] += *rowp++; |
| 389 |
|
rowomega[i] = cos(thdiv[i]) - cos(thdiv[i+1]); |
| 390 |
|
rowomega[i] *= 2.*PI / (double)sntp[1]; |
| 391 |
|
gscale += rowsum[i] * rowomega[i]; |
| 392 |
|
} |
| 393 |
< |
tvals[0] = .0f; |
| 394 |
< |
for (i = 1; i < ntheta; i++) { |
| 393 |
> |
if (gscale <= FTINY) { |
| 394 |
> |
sprintf(errmsg, "Sensor values sum to zero in file '%s'", sfile); |
| 395 |
> |
error(USER, errmsg); |
| 396 |
> |
} |
| 397 |
> |
for (i = 0; i < ntheta; i++) { |
| 398 |
|
prob = (double)i / (double)ntheta; |
| 399 |
|
for (t = 0; t < sntp[0]; t++) |
| 400 |
|
if ((prob -= rowsum[t]*rowomega[t]/gscale) <= .0) |
| 404 |
|
frac = 1. + prob/(rowsum[t]*rowomega[t]/gscale); |
| 405 |
|
tvals[i] = 1. - ( (1.-frac)*cos(thdiv[t]) + |
| 406 |
|
frac*cos(thdiv[t+1]) ); |
| 407 |
< |
pvals[i*(nphi+1)] = .0f; |
| 407 |
> |
/* offset b/c sensor values are centered */ |
| 408 |
> |
if ((t < sntp[0]-1) & (!t | (frac >= 0.5))) { |
| 409 |
> |
frac -= 0.5; |
| 410 |
> |
} else { |
| 411 |
> |
frac += 0.5; |
| 412 |
> |
--t; |
| 413 |
> |
} |
| 414 |
> |
pvals[i*(nphi+1)] = phdiv[0]; |
| 415 |
|
for (j = 1; j < nphi; j++) { |
| 416 |
|
prob = (double)j / (double)nphi; |
| 417 |
< |
rowp = sensor + t*(sntp[1]+1) + 1; |
| 418 |
< |
rowp1 = rowp + sntp[1]+1; |
| 419 |
< |
for (p = 0; p < sntp[1]; p++) { |
| 420 |
< |
if ((prob -= (1.-frac)*rowp[p]/rowsum[t-1] + |
| 421 |
< |
frac*rowp1[p]/rowsum[t]) <= .0) |
| 417 |
> |
rowp = &s_val(t,0); |
| 418 |
> |
rowp1 = &s_val(t+1,0); |
| 419 |
> |
for (p = 0; p < sntp[1]; p++) |
| 420 |
> |
if ((prob -= (1.-frac)*rowp[p]/rowsum[t] + |
| 421 |
> |
frac*rowp1[p]/rowsum[t+1]) <= .0) |
| 422 |
|
break; |
| 423 |
< |
if (p >= sntp[1]) |
| 424 |
< |
error(INTERNAL, |
| 425 |
< |
"code error 2 in init_ptable()"); |
| 358 |
< |
frac1 = 1. + prob/((1.-frac)*rowp[p]/rowsum[t-1] |
| 359 |
< |
+ frac*rowp1[p]/rowsum[t]); |
| 360 |
< |
pvals[i*(nphi+1) + j] = (1.-frac1)*phdiv[p] + |
| 361 |
< |
frac1*phdiv[p+1]; |
| 423 |
> |
if (p >= sntp[1]) { /* should never happen? */ |
| 424 |
> |
p = sntp[1] - 1; |
| 425 |
> |
prob = .5; |
| 426 |
|
} |
| 427 |
+ |
frac1 = 1. + prob/((1.-frac)*rowp[p]/rowsum[t] |
| 428 |
+ |
+ frac*rowp1[p]/rowsum[t+1]); |
| 429 |
+ |
pvals[i*(nphi+1) + j] = (1.-frac1)*phdiv[p] + |
| 430 |
+ |
frac1*phdiv[p+1]; |
| 431 |
|
} |
| 432 |
< |
pvals[i*(nphi+1) + nphi] = (float)(2.*PI); |
| 432 |
> |
pvals[i*(nphi+1) + nphi] = phdiv[sntp[1]]; |
| 433 |
|
} |
| 434 |
+ |
/* duplicate final row */ |
| 435 |
+ |
memcpy(pvals+ntheta*(nphi+1), pvals+(ntheta-1)*(nphi+1), |
| 436 |
+ |
sizeof(*pvals)*(nphi+1)); |
| 437 |
+ |
tvals[0] = .0f; |
| 438 |
|
tvals[ntheta] = (float)tsize; |
| 439 |
|
} |
| 440 |
|
|
| 480 |
|
int t, p; |
| 481 |
|
|
| 482 |
|
dv[2] = DOT(dvec, ourview.vdir); |
| 483 |
< |
theta = (float)((1./DEGREE) * acos(dv[2])); |
| 483 |
> |
theta = acos(dv[2]); |
| 484 |
|
if (theta >= maxtheta) |
| 485 |
|
return(.0f); |
| 486 |
|
dv[0] = DOT(dvec, ourview.hvec); |
| 487 |
|
dv[1] = DOT(dvec, ourview.vvec); |
| 488 |
< |
phi = (float)((1./DEGREE) * atan2(-dv[0], dv[1])); |
| 489 |
< |
while (phi < .0f) phi += 360.f; |
| 488 |
> |
phi = atan2(-dv[0], dv[1]); |
| 489 |
> |
while (phi < .0f) phi += (float)(2.*PI); |
| 490 |
|
t = (int)(theta/maxtheta * sntp[0]); |
| 491 |
< |
p = (int)(phi*(1./360.) * sntp[1]); |
| 491 |
> |
p = (int)(phi*(1./(2.*PI)) * sntp[1]); |
| 492 |
|
/* hack for non-uniform sensor grid */ |
| 493 |
< |
while (t+1 < sntp[0] && theta >= sensor[(t+2)*(sntp[1]+1)]) |
| 493 |
> |
theta *= (float)(1./DEGREE); |
| 494 |
> |
phi *= (float)(1./DEGREE); |
| 495 |
> |
while (t+1 < sntp[0] && theta >= s_theta(t+1)) |
| 496 |
|
++t; |
| 497 |
< |
while (t-1 >= 0 && theta < sensor[t*(sntp[1]+1)]) |
| 497 |
> |
while (t-1 >= 0 && theta <= s_theta(t-1)) |
| 498 |
|
--t; |
| 499 |
< |
while (p+1 < sntp[1] && phi >= sensor[p+2]) |
| 499 |
> |
while (p+1 < sntp[1] && phi >= s_phi(p+1)) |
| 500 |
|
++p; |
| 501 |
< |
while (p-1 >= 0 && phi < sensor[p]) |
| 501 |
> |
while (p-1 >= 0 && phi <= s_phi(p-1)) |
| 502 |
|
--p; |
| 503 |
< |
return(sensor[t*(sntp[1]+1) + p + 1]); |
| 503 |
> |
return(s_val(t,p)); |
| 504 |
|
} |
| 505 |
|
|
| 506 |
+ |
/* Print origin and direction */ |
| 507 |
+ |
static void |
| 508 |
+ |
print_ray( |
| 509 |
+ |
FVECT rorg, |
| 510 |
+ |
FVECT rdir |
| 511 |
+ |
) |
| 512 |
+ |
{ |
| 513 |
+ |
printf("%.6g %.6g %.6g %.8f %.8f %.8f\n", |
| 514 |
+ |
rorg[0], rorg[1], rorg[2], |
| 515 |
+ |
rdir[0], rdir[1], rdir[2]); |
| 516 |
+ |
} |
| 517 |
+ |
|
| 518 |
|
/* Compute sensor output */ |
| 519 |
|
static void |
| 520 |
|
comp_sensor( |
| 527 |
|
int nt, np; |
| 528 |
|
COLOR vsum; |
| 529 |
|
RAY rr; |
| 530 |
+ |
double sf; |
| 531 |
|
int i, j; |
| 532 |
|
/* set view */ |
| 533 |
|
ourview.type = VT_ANG; |
| 538 |
|
error(USER, err); |
| 539 |
|
/* assign probability table */ |
| 540 |
|
init_ptable(sfile); |
| 541 |
< |
/* do Monte Carlo sampling */ |
| 541 |
> |
/* stratified MC sampling */ |
| 542 |
|
setcolor(vsum, .0f, .0f, .0f); |
| 543 |
|
nt = (int)(sqrt((double)nsamps*ntheta/nphi) + .5); |
| 544 |
|
np = nsamps/nt; |
| 545 |
< |
VCOPY(rr.rorg, ourview.vp); |
| 459 |
< |
rr.rmax = .0; |
| 545 |
> |
sf = gscale/nsamps; |
| 546 |
|
for (i = 0; i < nt; i++) |
| 547 |
< |
for (j =0; j < np; j++) { |
| 548 |
< |
get_direc(rr.rdir, (i+frandom())/nt, |
| 549 |
< |
(j + frandom())/np); |
| 550 |
< |
rayorigin(&rr, PRIMARY, NULL, NULL); |
| 547 |
> |
for (j = 0; j < np; j++) { |
| 548 |
> |
VCOPY(rr.rorg, ourview.vp); |
| 549 |
> |
get_direc(rr.rdir, (i+frandom())/nt, (j+frandom())/np); |
| 550 |
> |
if (ourview.vfore > FTINY) |
| 551 |
> |
VSUM(rr.rorg, rr.rorg, rr.rdir, ourview.vfore); |
| 552 |
> |
if (!ray_pnprocs) { |
| 553 |
> |
print_ray(rr.rorg, rr.rdir); |
| 554 |
> |
continue; |
| 555 |
> |
} |
| 556 |
> |
rr.rmax = .0; |
| 557 |
> |
rayorigin(&rr, PRIMARY|SPECULAR, NULL, NULL); |
| 558 |
> |
scalecolor(rr.rcoef, sf); |
| 559 |
|
if (ray_pqueue(&rr) == 1) |
| 560 |
|
addcolor(vsum, rr.rcol); |
| 561 |
|
} |
| 562 |
< |
/* finish MC calculation */ |
| 563 |
< |
while (ray_presult(&rr, 0) > 0) |
| 564 |
< |
addcolor(vsum, rr.rcol); |
| 565 |
< |
scalecolor(vsum, gscale/(nt*np)); |
| 566 |
< |
/* compute direct component */ |
| 562 |
> |
/* remaining rays pure MC */ |
| 563 |
> |
for (i = nsamps - nt*np; i-- > 0; ) { |
| 564 |
> |
VCOPY(rr.rorg, ourview.vp); |
| 565 |
> |
get_direc(rr.rdir, frandom(), frandom()); |
| 566 |
> |
if (ourview.vfore > FTINY) |
| 567 |
> |
VSUM(rr.rorg, rr.rorg, rr.rdir, ourview.vfore); |
| 568 |
> |
if (!ray_pnprocs) { |
| 569 |
> |
print_ray(rr.rorg, rr.rdir); |
| 570 |
> |
continue; |
| 571 |
> |
} |
| 572 |
> |
rr.rmax = .0; |
| 573 |
> |
rayorigin(&rr, PRIMARY|SPECULAR, NULL, NULL); |
| 574 |
> |
scalecolor(rr.rcoef, sf); |
| 575 |
> |
if (ray_pqueue(&rr) == 1) |
| 576 |
> |
addcolor(vsum, rr.rcol); |
| 577 |
> |
} |
| 578 |
> |
if (!ray_pnprocs) /* just printing rays */ |
| 579 |
> |
return; |
| 580 |
> |
/* scale partial result */ |
| 581 |
> |
scalecolor(vsum, sf); |
| 582 |
> |
/* add direct component */ |
| 583 |
|
for (i = ndirs; i-- > 0; ) { |
| 584 |
|
SRCINDEX si; |
| 585 |
|
initsrcindex(&si); |
| 586 |
|
while (srcray(&rr, NULL, &si)) { |
| 587 |
< |
double d = sens_val(rr.rdir); |
| 588 |
< |
if (d <= FTINY) |
| 587 |
> |
sf = sens_val(rr.rdir); |
| 588 |
> |
if (sf <= FTINY) |
| 589 |
|
continue; |
| 590 |
< |
d *= si.dom/ndirs; |
| 591 |
< |
scalecolor(rr.rcoef, d); |
| 590 |
> |
sf *= si.dom/ndirs; |
| 591 |
> |
scalecolor(rr.rcoef, sf); |
| 592 |
|
if (ray_pqueue(&rr) == 1) { |
| 593 |
|
multcolor(rr.rcol, rr.rcoef); |
| 594 |
|
addcolor(vsum, rr.rcol); |
| 595 |
|
} |
| 596 |
|
} |
| 597 |
|
} |
| 598 |
< |
/* finish direct calculation */ |
| 598 |
> |
/* finish our calculation */ |
| 599 |
|
while (ray_presult(&rr, 0) > 0) { |
| 600 |
|
multcolor(rr.rcol, rr.rcoef); |
| 601 |
|
addcolor(vsum, rr.rcol); |
