292 |
|
main(int argc, char *argv[]) |
293 |
|
{ |
294 |
|
char buf[256]; |
295 |
+ |
double rotation = 0; /* site rotation (degrees) */ |
296 |
|
double elevation; /* site elevation (meters) */ |
297 |
|
int dir_is_horiz; /* direct is meas. on horizontal? */ |
298 |
|
float *mtx_data = NULL; /* our matrix data */ |
345 |
|
if (skycolor[1] <= 1e-4) |
346 |
|
skycolor[0] = skycolor[1] = skycolor[2] = 1; |
347 |
|
break; |
348 |
+ |
case 'r': /* rotate distribution */ |
349 |
+ |
if (argv[i][2] && argv[i][2] != 'z') |
350 |
+ |
goto userr; |
351 |
+ |
rotation = atof(argv[++i]); |
352 |
+ |
break; |
353 |
|
default: |
354 |
|
goto userr; |
355 |
|
} |
404 |
|
progname, s_latitude, s_longitude); |
405 |
|
fprintf(stderr, "%s: %d sky patches per time step\n", |
406 |
|
progname, nskypatch); |
407 |
+ |
if (rotation != 0) |
408 |
+ |
fprintf(stderr, "%s: rotating output %.0f degrees\n", |
409 |
+ |
progname, rotation); |
410 |
|
} |
411 |
|
/* convert quantities to radians */ |
412 |
|
s_latitude = DegToRad(s_latitude); |
430 |
|
sda = sdec(julian_date); |
431 |
|
sta = stadj(julian_date); |
432 |
|
altitude = salt(sda, hr+sta); |
433 |
< |
azimuth = sazi(sda, hr+sta) + PI; |
433 |
> |
azimuth = sazi(sda, hr+sta) + PI - DegToRad(rotation); |
434 |
|
/* convert measured values */ |
435 |
|
if (dir_is_horiz && altitude > 0.) |
436 |
|
dir /= sin(altitude); |
503 |
|
fprintf(stderr, "%s: done.\n", progname); |
504 |
|
exit(0); |
505 |
|
userr: |
506 |
< |
fprintf(stderr, "Usage: %s [-v][-d|-s][-m N][-g r g b][-c r g b][-o{f|d}] [tape.wea]\n", |
506 |
> |
fprintf(stderr, "Usage: %s [-v][-d|-s][-r deg][-m N][-g r g b][-c r g b][-o{f|d}] [tape.wea]\n", |
507 |
|
progname); |
508 |
|
exit(1); |
509 |
|
fmterr: |
524 |
|
{ |
525 |
|
int index; /* Category index */ |
526 |
|
double norm_diff_illum; /* Normalized diffuse illuimnance */ |
518 |
– |
double zlumin; /* Zenith luminance */ |
527 |
|
int i; |
528 |
|
|
529 |
|
/* Calculate atmospheric precipitable water content */ |
590 |
|
/* Normalization coefficient */ |
591 |
|
norm_diff_illum = diff_illum / norm_diff_illum; |
592 |
|
|
585 |
– |
/* Calculate relative zenith luminance */ |
586 |
– |
zlumin = CalcRelLuminance(sun_zenith, 0.0); |
587 |
– |
|
588 |
– |
/* Calculate absolute zenith illuminance */ |
589 |
– |
zlumin *= norm_diff_illum; |
590 |
– |
|
593 |
|
/* Apply to sky patches to get absolute radiance values */ |
594 |
|
for (i = 1; i < nskypatch; i++) { |
595 |
< |
scalecolor(parr+3*i, zlumin*(1./WHTEFFICACY)); |
595 |
> |
scalecolor(parr+3*i, norm_diff_illum*(1./WHTEFFICACY)); |
596 |
|
multcolor(parr+3*i, skycolor); |
597 |
|
} |
598 |
|
} |
947 |
|
double rh_illum = 0.0; /* Relative horizontal illuminance */ |
948 |
|
|
949 |
|
for (i = 1; i < nskypatch; i++) |
950 |
< |
rh_illum += parr[3*i+1] * rh_cos(i); |
950 |
> |
rh_illum += parr[3*i+1] * rh_cos(i) * rh_dom[i]; |
951 |
|
|
952 |
< |
return rh_illum * (2.0 * PI / (nskypatch-1)); |
952 |
> |
return rh_illum; |
953 |
|
} |
954 |
|
|
955 |
|
/* Calculate earth orbit eccentricity correction factor */ |