246 |
|
{ 101.18, 1.58, -1.10, -8.29 } |
247 |
|
}; |
248 |
|
|
249 |
+ |
#ifndef NSUNPATCH |
250 |
+ |
#define NSUNPATCH 4 /* # patches to spread sun into */ |
251 |
+ |
#endif |
252 |
+ |
|
253 |
|
extern int jdate(int month, int day); |
254 |
|
extern double stadj(int jd); |
255 |
|
extern double sdec(int jd); |
260 |
|
extern double s_longitude; |
261 |
|
extern double s_meridian; |
262 |
|
|
259 |
– |
double grefl = 0.2; /* diffuse ground reflectance */ |
260 |
– |
|
263 |
|
int verbose = 0; /* progress reports to stderr? */ |
264 |
|
|
265 |
|
int outfmt = 'a'; /* output format */ |
266 |
|
|
267 |
|
int rhsubdiv = 1; /* Reinhart sky subdivisions */ |
268 |
|
|
269 |
< |
float skycolor[3] = {.96, 1.004, 1.118}; /* sky coloration */ |
269 |
> |
COLOR skycolor = {.96, 1.004, 1.118}; /* sky coloration */ |
270 |
> |
COLOR suncolor = {1., 1., 1.}; /* sun color */ |
271 |
> |
COLOR grefl = {.2, .2, .2}; /* ground reflectance */ |
272 |
|
|
269 |
– |
int do_sun = 1; /* output direct solar contribution? */ |
270 |
– |
|
273 |
|
int nskypatch; /* number of Reinhart patches */ |
274 |
|
float *rh_palt; /* sky patch altitudes (radians) */ |
275 |
|
float *rh_pazi; /* sky patch azimuths (radians) */ |
307 |
|
/* get options */ |
308 |
|
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
309 |
|
switch (argv[i][1]) { |
310 |
< |
case 'g': |
311 |
< |
grefl = atof(argv[++i]); |
310 |
> |
case 'g': /* ground reflectance */ |
311 |
> |
grefl[0] = atof(argv[++i]); |
312 |
> |
grefl[1] = atof(argv[++i]); |
313 |
> |
grefl[2] = atof(argv[++i]); |
314 |
|
break; |
315 |
< |
case 'v': |
315 |
> |
case 'v': /* verbose progress reports */ |
316 |
|
verbose++; |
317 |
|
break; |
318 |
< |
case 'o': |
318 |
> |
case 'o': /* output format */ |
319 |
|
switch (argv[i][2]) { |
320 |
|
case 'f': |
321 |
|
case 'd': |
326 |
|
goto userr; |
327 |
|
} |
328 |
|
break; |
329 |
< |
case 'm': |
329 |
> |
case 'm': /* Reinhart subdivisions */ |
330 |
|
rhsubdiv = atoi(argv[++i]); |
331 |
|
break; |
332 |
< |
case 'c': |
332 |
> |
case 'c': /* sky color */ |
333 |
|
skycolor[0] = atof(argv[++i]); |
334 |
|
skycolor[1] = atof(argv[++i]); |
335 |
|
skycolor[2] = atof(argv[++i]); |
336 |
|
break; |
337 |
< |
case 'd': |
334 |
< |
do_sun = 1; |
337 |
> |
case 'd': /* solar (direct) only */ |
338 |
|
skycolor[0] = skycolor[1] = skycolor[2] = 0; |
339 |
+ |
if (suncolor[1] <= 1e-4) |
340 |
+ |
suncolor[0] = suncolor[1] = suncolor[2] = 1; |
341 |
|
break; |
342 |
< |
case 's': |
343 |
< |
do_sun = 0; |
342 |
> |
case 's': /* sky only (no direct) */ |
343 |
> |
suncolor[0] = suncolor[1] = suncolor[2] = 0; |
344 |
|
if (skycolor[1] <= 1e-4) |
345 |
|
skycolor[0] = skycolor[1] = skycolor[2] = 1; |
346 |
|
break; |
434 |
|
} |
435 |
|
/* compute sky patch values */ |
436 |
|
ComputeSky(mtx_data+mtx_offset); |
437 |
< |
if (do_sun) |
433 |
< |
AddDirect(mtx_data+mtx_offset); |
437 |
> |
AddDirect(mtx_data+mtx_offset); |
438 |
|
} |
439 |
|
/* check for junk at end */ |
440 |
|
while ((i = fgetc(stdin)) != EOF) |
459 |
|
switch (outfmt) { |
460 |
|
case 'a': |
461 |
|
for (j = 0; j < ntsteps; j++) { |
462 |
< |
printf("%.3e %.3e %.3e\n", mtx_data[mtx_offset], |
462 |
> |
printf("%.3g %.3g %.3g\n", mtx_data[mtx_offset], |
463 |
|
mtx_data[mtx_offset+1], |
464 |
|
mtx_data[mtx_offset+2]); |
465 |
|
mtx_offset += 3*nskypatch; |
494 |
|
fprintf(stderr, "%s: done.\n", progname); |
495 |
|
exit(0); |
496 |
|
userr: |
497 |
< |
fprintf(stderr, "Usage: %s [-v][-d|-s][-m N][-g refl][-c r g b][-o{f|d}] [tape.wea]\n", |
497 |
> |
fprintf(stderr, "Usage: %s [-v][-d|-s][-m N][-g r g b][-c r g b][-o{f|d}] [tape.wea]\n", |
498 |
|
progname); |
499 |
|
exit(1); |
500 |
|
fmterr: |
521 |
|
/* Calculate atmospheric precipitable water content */ |
522 |
|
apwc = CalcPrecipWater(dew_point); |
523 |
|
|
524 |
< |
/* Limit solar altitude to keep circumsolar off zenith */ |
525 |
< |
if (altitude > DegToRad(87.0)) |
526 |
< |
altitude = DegToRad(87.0); |
524 |
> |
/* Calculate sun zenith angle (don't let it dip below horizon) */ |
525 |
> |
/* Also limit minimum angle to keep circumsolar off zenith */ |
526 |
> |
if (altitude <= 0.0) |
527 |
> |
sun_zenith = DegToRad(90.0); |
528 |
> |
else if (altitude >= DegToRad(87.0)) |
529 |
> |
sun_zenith = DegToRad(3.0); |
530 |
> |
else |
531 |
> |
sun_zenith = DegToRad(90.0) - altitude; |
532 |
|
|
524 |
– |
/* Calculate sun zenith angle */ |
525 |
– |
sun_zenith = DegToRad(90.0) - altitude; |
526 |
– |
|
533 |
|
/* Compute the inputs for the calculation of the sky distribution */ |
534 |
|
|
535 |
|
if (input == 0) /* XXX never used */ |
564 |
|
return; |
565 |
|
} |
566 |
|
/* Compute ground radiance (include solar contribution if any) */ |
567 |
< |
parr[0] = diff_illum * (1./PI/WHTEFFICACY); |
567 |
> |
parr[0] = diff_illum; |
568 |
|
if (altitude > 0) |
569 |
< |
parr[0] += dir_illum * sin(altitude) * (1./PI/WHTEFFICACY); |
570 |
< |
parr[2] = parr[1] = parr[0]; |
569 |
> |
parr[0] += dir_illum * sin(altitude); |
570 |
> |
parr[2] = parr[1] = parr[0] *= (1./PI/WHTEFFICACY); |
571 |
> |
multcolor(parr, grefl); |
572 |
|
|
573 |
|
/* Calculate Perez sky model parameters */ |
574 |
|
CalcPerezParam(sun_zenith, sky_clearness, sky_brightness, index); |
600 |
|
AddDirect(float *parr) |
601 |
|
{ |
602 |
|
FVECT svec; |
603 |
< |
double near_dprod[4]; |
604 |
< |
int near_patch[4]; |
605 |
< |
double wta[4], wtot; |
603 |
> |
double near_dprod[NSUNPATCH]; |
604 |
> |
int near_patch[NSUNPATCH]; |
605 |
> |
double wta[NSUNPATCH], wtot; |
606 |
|
int i, j, p; |
607 |
|
|
608 |
< |
if (!do_sun || dir_illum < 1e-4) |
608 |
> |
if (dir_illum <= 1e-4 || bright(suncolor) <= 1e-4) |
609 |
|
return; |
610 |
< |
/* identify 4 closest patches */ |
611 |
< |
for (i = 4; i--; ) |
610 |
> |
/* identify NSUNPATCH closest patches */ |
611 |
> |
for (i = NSUNPATCH; i--; ) |
612 |
|
near_dprod[i] = -1.; |
613 |
|
vector(svec, altitude, azimuth); |
614 |
|
for (p = 1; p < nskypatch; p++) { |
616 |
|
double dprod; |
617 |
|
rh_vector(pvec, p); |
618 |
|
dprod = DOT(pvec, svec); |
619 |
< |
for (i = 0; i < 4; i++) |
619 |
> |
for (i = 0; i < NSUNPATCH; i++) |
620 |
|
if (dprod > near_dprod[i]) { |
621 |
< |
for (j = 4; --j > i; ) { |
621 |
> |
for (j = NSUNPATCH; --j > i; ) { |
622 |
|
near_dprod[j] = near_dprod[j-1]; |
623 |
|
near_patch[j] = near_patch[j-1]; |
624 |
|
} |
628 |
|
} |
629 |
|
} |
630 |
|
wtot = 0; /* weight by proximity */ |
631 |
< |
for (i = 4; i--; ) |
631 |
> |
for (i = NSUNPATCH; i--; ) |
632 |
|
wtot += wta[i] = 1./(1.002 - near_dprod[i]); |
633 |
|
/* add to nearest patch radiances */ |
634 |
< |
for (i = 4; i--; ) { |
634 |
> |
for (i = NSUNPATCH; i--; ) { |
635 |
|
float *pdest = parr + 3*near_patch[i]; |
636 |
|
float val_add = wta[i] * dir_illum / |
637 |
|
(WHTEFFICACY * wtot * rh_dom[near_patch[i]]); |
638 |
< |
*pdest++ += val_add; |
639 |
< |
*pdest++ += val_add; |
640 |
< |
*pdest++ += val_add; |
638 |
> |
*pdest++ += val_add*suncolor[0]; |
639 |
> |
*pdest++ += val_add*suncolor[1]; |
640 |
> |
*pdest++ += val_add*suncolor[2]; |
641 |
|
} |
642 |
|
} |
643 |
|
|
672 |
|
for (i = 0; i < NROW*rhsubdiv; i++) { |
673 |
|
const float ralt = alpha*(i + .5); |
674 |
|
const int ninrow = tnaz[i/rhsubdiv]*rhsubdiv; |
675 |
< |
const float dom = (sin(alpha*(i+1)) - sin(alpha*i))/ninrow; |
675 |
> |
const float dom = 2.*PI*(sin(alpha*(i+1)) - sin(alpha*i)) / |
676 |
> |
(double)ninrow; |
677 |
|
for (j = 0; j < ninrow; j++) { |
678 |
|
rh_palt[p] = ralt; |
679 |
|
rh_pazi[p] = 2.*PI * j / (double)ninrow; |