| 12 |
|
|
| 13 |
|
#include "glare.h" |
| 14 |
|
|
| 15 |
< |
#define FEQ(a,b) ((a)-(b)<=FTINY&&(a)-(b)<=FTINY) |
| 15 |
> |
#define FEQ(a,b) ((a)-(b)<=FTINY&&(b)-(a)<=FTINY) |
| 16 |
|
#define VEQ(v1,v2) (FEQ((v1)[0],(v2)[0])&&FEQ((v1)[1],(v2)[1]) \ |
| 17 |
|
&&FEQ((v1)[2],(v2)[2])) |
| 18 |
|
|
| 19 |
< |
char *rtargv[32] = {"rtrace", "-h", "-ov", "-fff"}; |
| 19 |
> |
char *rtargv[32] = {"rtrace", "-h-", "-ov", "-fff"}; |
| 20 |
|
int rtargc = 4; |
| 21 |
|
|
| 22 |
|
VIEW ourview = STDVIEW; /* our view */ |
| 36 |
|
int nglarangs = 0; |
| 37 |
|
double maxtheta; /* maximum angle (in radians) */ |
| 38 |
|
int hsize; /* horizontal size */ |
| 39 |
– |
int hlim; /* central limit of horizontal */ |
| 39 |
|
|
| 40 |
|
struct illum *indirect; /* array of indirect illuminances */ |
| 41 |
|
|
| 106 |
|
break; |
| 107 |
|
case 'd': |
| 108 |
|
case 'l': |
| 109 |
+ |
case 's': |
| 110 |
|
rtargv[rtargc++] = argv[i]; |
| 111 |
|
rtargv[rtargc++] = argv[++i]; |
| 112 |
|
break; |
| 191 |
|
fputs(VIEWSTR, stdout); |
| 192 |
|
fprintview(&ourview, stdout); |
| 193 |
|
printf("\n"); |
| 194 |
< |
fputformat("ASCII", stdout); |
| 194 |
> |
fputformat("ascii", stdout); |
| 195 |
|
printf("\n"); |
| 196 |
|
printsources(); /* print glare sources */ |
| 197 |
|
printillum(); /* print illuminances */ |
| 204 |
|
} |
| 205 |
|
|
| 206 |
|
|
| 207 |
+ |
int |
| 208 |
+ |
angcmp(ap1, ap2) /* compare two angles */ |
| 209 |
+ |
ANGLE *ap1, *ap2; |
| 210 |
+ |
{ |
| 211 |
+ |
register int a1, a2; |
| 212 |
+ |
|
| 213 |
+ |
a1 = *ap1; |
| 214 |
+ |
a2 = *ap2; |
| 215 |
+ |
if (a1 == a2) { |
| 216 |
+ |
fprintf(stderr, "%s: duplicate glare angle (%d)\n", |
| 217 |
+ |
progname, a1); |
| 218 |
+ |
exit(1); |
| 219 |
+ |
} |
| 220 |
+ |
return(a1-a2); |
| 221 |
+ |
} |
| 222 |
+ |
|
| 223 |
+ |
|
| 224 |
|
init() /* initialize global variables */ |
| 225 |
|
{ |
| 226 |
|
double d; |
| 232 |
|
/* set direction vectors */ |
| 233 |
|
for (i = 0; glarang[i] != AEND; i++) |
| 234 |
|
; |
| 235 |
< |
if (i > 0 && (glarang[0] <= 0 || glarang[i-1] >= 180)) { |
| 236 |
< |
fprintf(stderr, "%s: glare angles must be between 1 and 179\n", |
| 235 |
> |
qsort(glarang, i, sizeof(ANGLE), angcmp); |
| 236 |
> |
if (i > 0 && (glarang[0] <= 0 || glarang[i-1] > 180)) { |
| 237 |
> |
fprintf(stderr, "%s: glare angles must be between 1 and 180\n", |
| 238 |
|
progname); |
| 239 |
|
exit(1); |
| 240 |
|
} |
| 245 |
|
maxtheta = (PI/180.)*glarang[nglarangs-1]; |
| 246 |
|
else |
| 247 |
|
maxtheta = 0.0; |
| 248 |
< |
hlim = sampdens*maxtheta; |
| 231 |
< |
hsize = hlim + sampdens - 1; |
| 248 |
> |
hsize = hlim(0) + sampdens - 1; |
| 249 |
|
if (hsize > (int)(PI*sampdens)) |
| 250 |
|
hsize = PI*sampdens; |
| 251 |
|
indirect = (struct illum *)calloc(nglardirs, sizeof(struct illum)); |
| 311 |
|
} |
| 312 |
|
|
| 313 |
|
|
| 314 |
< |
compdir(vd, x, y, se) /* compute direction for x,y */ |
| 314 |
> |
compdir(vd, x, y) /* compute direction for x,y */ |
| 315 |
|
FVECT vd; |
| 316 |
|
int x, y; |
| 300 |
– |
SPANERR *se; |
| 317 |
|
{ |
| 318 |
+ |
int hl; |
| 319 |
|
FVECT org; /* dummy variable */ |
| 320 |
|
|
| 321 |
< |
if (x <= -hlim) /* left region */ |
| 321 |
> |
hl = hlim(y); |
| 322 |
> |
if (x <= -hl) { /* left region */ |
| 323 |
> |
if (x <= -hl-sampdens) |
| 324 |
> |
return(-1); |
| 325 |
|
return(viewray(org, vd, &leftview, |
| 326 |
< |
(double)(x+hlim)/(2*sampdens)+.5, |
| 326 |
> |
(double)(x+hl)/(2*sampdens)+.5, |
| 327 |
|
(double)y/(2*sampdens)+.5)); |
| 328 |
< |
if (x >= hlim) /* right region */ |
| 328 |
> |
} |
| 329 |
> |
if (x >= hl) { /* right region */ |
| 330 |
> |
if (x >= hl+sampdens) |
| 331 |
> |
return(-1); |
| 332 |
|
return(viewray(org, vd, &rightview, |
| 333 |
< |
(double)(x-hlim)/(2*sampdens)+.5, |
| 333 |
> |
(double)(x-hl)/(2*sampdens)+.5, |
| 334 |
|
(double)y/(2*sampdens)+.5)); |
| 312 |
– |
/* central region */ |
| 313 |
– |
if (se != NULL) { /* avoid over-counting of poles */ |
| 314 |
– |
se->err += se->prob; |
| 315 |
– |
if (se->err <= 0.5) |
| 316 |
– |
return(-1); |
| 317 |
– |
se->err -= 1.0; |
| 335 |
|
} |
| 336 |
+ |
/* central region */ |
| 337 |
|
if (viewray(org, vd, &ourview, .5, (double)y/(2*sampdens)+.5) < 0) |
| 338 |
|
return(-1); |
| 339 |
< |
spinvector(vd, vd, ourview.vup, h_theta(x)); |
| 339 |
> |
spinvector(vd, vd, ourview.vup, h_theta(x,y)); |
| 340 |
|
return(0); |
| 341 |
|
} |
| 342 |
|
|
| 343 |
|
|
| 344 |
< |
setspanerr(se, y) /* initialize span error at y */ |
| 345 |
< |
register SPANERR *se; |
| 346 |
< |
int y; |
| 344 |
> |
double |
| 345 |
> |
pixsize(x, y) /* return the solid angle of pixel at (x,y) */ |
| 346 |
> |
int x, y; |
| 347 |
|
{ |
| 348 |
< |
se->err = 0.0; |
| 349 |
< |
se->prob = sqrt(1.0 - (double)((long)y*y)/((long)vsize*vsize)); |
| 348 |
> |
register int hl, xo; |
| 349 |
> |
double disc; |
| 350 |
> |
|
| 351 |
> |
hl = hlim(y); |
| 352 |
> |
if (x < -hl) |
| 353 |
> |
xo = x+hl; |
| 354 |
> |
else if (x > hl) |
| 355 |
> |
xo = x-hl; |
| 356 |
> |
else |
| 357 |
> |
xo = 0; |
| 358 |
> |
disc = 1. - (double)(xo*xo + y*y)/(sampdens*sampdens); |
| 359 |
> |
if (disc <= FTINY) |
| 360 |
> |
return(0.); |
| 361 |
> |
return(1./(sampdens*sampdens*sqrt(disc))); |
| 362 |
|
} |
| 363 |
|
|
| 364 |
|
|
