| 164 |
|
static void |
| 165 |
|
init(void) /* initialize calculation */ |
| 166 |
|
{ |
| 167 |
+ |
char *err; |
| 168 |
|
/* read header */ |
| 169 |
|
getheader(stdin, headline, NULL); |
| 170 |
|
if (wrongformat) { |
| 172 |
|
exit(1); |
| 173 |
|
} |
| 174 |
|
/* set view */ |
| 175 |
< |
if (setview(&midview) != NULL) { |
| 176 |
< |
fprintf(stderr, "%s: bad view information in input\n", |
| 175 |
> |
if ((err = setview(&midview)) != NULL) { |
| 176 |
> |
fprintf(stderr, "%s: %s\n", |
| 177 |
> |
progname, err); |
| 178 |
> |
exit(1); |
| 179 |
> |
} |
| 180 |
> |
if (fabs(DOT(midview.vdir, midview.vup)) > 1e-4) { |
| 181 |
> |
fprintf(stderr, |
| 182 |
> |
"%s: Input view direction not perpendicular to up vector\n", |
| 183 |
|
progname); |
| 184 |
|
exit(1); |
| 185 |
|
} |
| 326 |
|
d = DOT(sd,vd); |
| 327 |
|
if (d <= 0.0) |
| 328 |
|
return(-1.0); |
| 329 |
< |
if (d >= 1.0) |
| 329 |
> |
if (d >= 1.0-FTINY) |
| 330 |
|
return(1.0); |
| 331 |
|
sigma = acos(d) * (180./PI); |
| 332 |
|
d = fabs(DOT(sd,vu)/sqrt(1.0-d*d)); |
| 333 |
< |
if (d >= 1.0) |
| 327 |
< |
tau = 0.0; |
| 328 |
< |
else |
| 329 |
< |
tau = acos(d) * (180./PI); |
| 333 |
> |
tau = Acos(d) * (180./PI); |
| 334 |
|
return( exp( sigma*( (35.2 - tau*.31889 - 1.22*exp(-.22222*tau))*1e-3 |
| 335 |
|
+ sigma*(21. + tau*(.26667 + tau*-.002963))*1e-5 ) |
| 336 |
|
) ); |
| 345 |
|
struct glare_src *gs; |
| 346 |
|
FVECT mydir,testdir[7],vhor; |
| 347 |
|
double r,posn,omega,p[7],sum; |
| 348 |
< |
int i,n; |
| 348 |
> |
int i; |
| 349 |
|
|
| 350 |
|
spinvector(mydir, midview.vdir, midview.vup, gd->ang); |
| 351 |
< |
sum = 0.0; n = 0; |
| 351 |
> |
sum = 0.0; |
| 352 |
|
for (gs = all_srcs; gs != NULL; gs = gs->next) { |
| 353 |
|
|
| 354 |
|
/* compute 1/p^2 weighted solid angle of the source */ |
| 355 |
< |
r = sqrt(1 - pow(1.-gs->dom/2./PI,2.)); |
| 355 |
> |
r = 1. - gs->dom*(.5/PI); |
| 356 |
> |
r = sqrt(1. - r*r); |
| 357 |
|
fcross(vhor,gs->dir,midview.vup); |
| 358 |
< |
normalize(vhor); |
| 358 |
> |
if (normalize(vhor) == 0.) |
| 359 |
> |
continue; |
| 360 |
|
VCOPY(testdir[0],gs->dir); |
| 361 |
|
fvsum(testdir[1],gs->dir,vhor,r); |
| 362 |
|
fvsum(testdir[2],gs->dir,vhor,0.5*r); |
| 367 |
|
fvsum(testdir[6],testdir[4],midview.vup,0.866*r); |
| 368 |
|
fvsum(testdir[4],testdir[4],midview.vup,-0.866*r); |
| 369 |
|
for (i = 0; i < 7; i++) { |
| 370 |
< |
normalize(testdir[i]); |
| 370 |
> |
p[i] = 0.0; |
| 371 |
> |
if (normalize(testdir[i]) == 0.) |
| 372 |
> |
continue; |
| 373 |
|
posn = posindex(testdir[i],mydir,midview.vup); |
| 374 |
< |
if (posn <= FTINY) |
| 367 |
< |
p[i] = 0.0; |
| 368 |
< |
else |
| 374 |
> |
if (posn > FTINY) |
| 375 |
|
p[i] = 1./(posn*posn); |
| 376 |
|
} |
| 377 |
< |
r = 1-gs->dom/2./PI; |
| 377 |
> |
r = 1. - gs->dom*(.5/PI); |
| 378 |
|
omega = gs->dom*p[0]; |
| 379 |
< |
omega += (r*PI*(1+1/r/r)-2*PI)*(-p[0]+(p[1]+p[2])*0.5); |
| 380 |
< |
omega += (2*PI-r*PI*(1+1/r/r))*(-p[0]-0.1667*(p[1]+p[3]) |
| 379 |
> |
omega += (r*PI*(1.+1./(r*r))-2.*PI)*(-p[0]+(p[1]+p[2])*0.5); |
| 380 |
> |
omega += (2.*PI-r*PI*(1.+1./(r*r)))*(-p[0]-0.1667*(p[1]+p[3]) |
| 381 |
|
+0.3334*(p[2]+p[4]+p[5]+p[6])); |
| 382 |
< |
|
| 382 |
> |
if (omega <= 0.) |
| 383 |
> |
omega = 0.; |
| 384 |
|
sum += pow(gs->lum,1.6) * pow(omega,0.8) / |
| 385 |
< |
(gd->indirect/PI + 0.07*sqrt(gs->dom)*gs->lum); |
| 379 |
< |
n++; |
| 385 |
> |
(gd->indirect*(1./PI) + 0.07*sqrt(gs->dom)*gs->lum); |
| 386 |
|
} |
| 387 |
< |
if (n == 0) |
| 387 |
> |
if (sum <= FTINY) |
| 388 |
|
return(0.0); |
| 389 |
< |
return( 10*log10(0.478*sum) ); |
| 389 |
> |
return( 10.*log10(0.478*sum) ); |
| 390 |
|
} |
| 391 |
|
|
| 392 |
|
|
| 410 |
|
} |
| 411 |
|
if (sum <= FTINY) |
| 412 |
|
return(0.0); |
| 413 |
< |
sum /= gd->indirect/PI; |
| 413 |
> |
sum *= PI/gd->indirect; |
| 414 |
|
return(10*log10(0.478*sum)); |
| 415 |
|
} |
| 416 |
|
|
