| 247 |
|
}; |
| 248 |
|
|
| 249 |
|
#ifndef NSUNPATCH |
| 250 |
< |
#define NSUNPATCH 4 /* # patches to spread sun into */ |
| 250 |
> |
#define NSUNPATCH 4 /* max. # patches to spread sun into */ |
| 251 |
|
#endif |
| 252 |
|
|
| 253 |
|
extern int jdate(int month, int day); |
| 260 |
|
extern double s_longitude; |
| 261 |
|
extern double s_meridian; |
| 262 |
|
|
| 263 |
+ |
int nsuns = NSUNPATCH; /* number of sun patches to use */ |
| 264 |
+ |
double fixed_sun_sa = -1; /* fixed solid angle per sun? */ |
| 265 |
+ |
|
| 266 |
|
int verbose = 0; /* progress reports to stderr? */ |
| 267 |
|
|
| 268 |
|
int outfmt = 'a'; /* output format */ |
| 353 |
|
goto userr; |
| 354 |
|
rotation = atof(argv[++i]); |
| 355 |
|
break; |
| 356 |
+ |
case '5': /* 5-phase calculation */ |
| 357 |
+ |
nsuns = 1; |
| 358 |
+ |
fixed_sun_sa = 6.797e-05; |
| 359 |
+ |
break; |
| 360 |
|
default: |
| 361 |
|
goto userr; |
| 362 |
|
} |
| 624 |
|
|
| 625 |
|
if (dir_illum <= 1e-4 || bright(suncolor) <= 1e-4) |
| 626 |
|
return; |
| 627 |
< |
/* identify NSUNPATCH closest patches */ |
| 628 |
< |
for (i = NSUNPATCH; i--; ) |
| 627 |
> |
/* identify nsuns closest patches */ |
| 628 |
> |
if (nsuns > NSUNPATCH) |
| 629 |
> |
nsuns = NSUNPATCH; |
| 630 |
> |
else if (nsuns <= 0) |
| 631 |
> |
nsuns = 1; |
| 632 |
> |
for (i = nsuns; i--; ) |
| 633 |
|
near_dprod[i] = -1.; |
| 634 |
|
vector(svec, altitude, azimuth); |
| 635 |
|
for (p = 1; p < nskypatch; p++) { |
| 637 |
|
double dprod; |
| 638 |
|
rh_vector(pvec, p); |
| 639 |
|
dprod = DOT(pvec, svec); |
| 640 |
< |
for (i = 0; i < NSUNPATCH; i++) |
| 640 |
> |
for (i = 0; i < nsuns; i++) |
| 641 |
|
if (dprod > near_dprod[i]) { |
| 642 |
< |
for (j = NSUNPATCH; --j > i; ) { |
| 642 |
> |
for (j = nsuns; --j > i; ) { |
| 643 |
|
near_dprod[j] = near_dprod[j-1]; |
| 644 |
|
near_patch[j] = near_patch[j-1]; |
| 645 |
|
} |
| 649 |
|
} |
| 650 |
|
} |
| 651 |
|
wtot = 0; /* weight by proximity */ |
| 652 |
< |
for (i = NSUNPATCH; i--; ) |
| 652 |
> |
for (i = nsuns; i--; ) |
| 653 |
|
wtot += wta[i] = 1./(1.002 - near_dprod[i]); |
| 654 |
|
/* add to nearest patch radiances */ |
| 655 |
< |
for (i = NSUNPATCH; i--; ) { |
| 655 |
> |
for (i = nsuns; i--; ) { |
| 656 |
|
float *pdest = parr + 3*near_patch[i]; |
| 657 |
< |
float val_add = wta[i] * dir_illum / |
| 658 |
< |
(WHTEFFICACY * wtot * rh_dom[near_patch[i]]); |
| 657 |
> |
float val_add = wta[i] * dir_illum / (WHTEFFICACY * wtot); |
| 658 |
> |
|
| 659 |
> |
val_add /= (fixed_sun_sa > 0) ? fixed_sun_sa |
| 660 |
> |
: rh_dom[near_patch[i]] ; |
| 661 |
|
*pdest++ += val_add*suncolor[0]; |
| 662 |
|
*pdest++ += val_add*suncolor[1]; |
| 663 |
|
*pdest++ += val_add*suncolor[2]; |