89 |
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#include "color.h" |
90 |
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#include "sun.h" |
91 |
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|
92 |
< |
char *progname; /* Program name */ |
93 |
< |
char errmsg[128]; /* Error message buffer */ |
92 |
> |
char *progname; /* Program name */ |
93 |
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const double DC_SolarConstantE = 1367.0; /* Solar constant W/m^2 */ |
94 |
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const double DC_SolarConstantL = 127.5; /* Solar constant klux */ |
95 |
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|
128 |
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extern void CalcSkyPatchLumin( float *parr ); |
129 |
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extern void ComputeSky( float *parr ); |
130 |
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|
131 |
+ |
|
132 |
+ |
extern double solar_sunset(int month, int day); |
133 |
+ |
extern double solar_sunrise(int month, int day); |
134 |
+ |
|
135 |
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/* Degrees into radians */ |
136 |
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#define DegToRad(deg) ((deg)*(PI/180.)) |
137 |
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|
138 |
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/* Radiuans into degrees */ |
139 |
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#define RadToDeg(rad) ((rad)*(180./PI)) |
140 |
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|
138 |
– |
|
141 |
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/* Perez sky model coefficients */ |
142 |
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|
143 |
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/* Reference: Perez, R., R. Seals, and J. Michalsky, 1993. "All- */ |
314 |
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double rotation = 0; /* site rotation (degrees) */ |
315 |
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double elevation; /* site elevation (meters) */ |
316 |
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int leap_day = 0; /* add leap day? */ |
317 |
+ |
int sun_hours_only = 0; /* only output sun hours? */ |
318 |
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int dir_is_horiz; /* direct is meas. on horizontal? */ |
319 |
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FILE *sunsfp = NULL; /* output file for individual suns */ |
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FILE *modsfp = NULL; /* modifier output file */ |
329 |
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double dir, dif; /* direct and diffuse values */ |
330 |
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int mtx_offset; |
331 |
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int i, j; |
332 |
+ |
double timeinterval = 0; |
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|
334 |
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progname = argv[0]; |
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/* get options */ |
410 |
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case 's': /* sky only (no direct) */ |
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suncolor[0] = suncolor[1] = suncolor[2] = 0; |
412 |
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break; |
413 |
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case 'u': /* solar hours only */ |
414 |
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sun_hours_only = 1; |
415 |
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break; |
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case 'r': /* rotate distribution */ |
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if (argv[i][2] && argv[i][2] != 'z') |
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goto userr; |
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case 'A': /* compute average sky */ |
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avgSky = 1; |
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break; |
434 |
+ |
case 'i': |
435 |
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timeinterval = atof(argv[++i]); |
436 |
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break; |
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default: |
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goto userr; |
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} |
493 |
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fprintf(stderr, "%s: %d sky patches\n", |
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progname, nskypatch); |
495 |
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if (sunsfp) |
496 |
< |
fprintf(stderr, "%s: outputting suns to file\n", |
497 |
< |
progname); |
496 |
> |
fprintf(stderr, "%s: outputting suns to %s\n", |
497 |
> |
progname, sunsfp==stdout ? "stdout" : "file"); |
498 |
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if (rotation != 0) |
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fprintf(stderr, "%s: rotating output %.0f degrees\n", |
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progname, rotation); |
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mtx_data = resize_dmatrix(mtx_data, tstorage=2, nskypatch); |
508 |
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/* process each time step in tape */ |
509 |
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while (scanf("%d %d %lf %lf %lf\n", &mo, &da, &hr, &dir, &dif) == 5) { |
510 |
< |
double sda, sta; |
510 |
> |
double sda, sta, st; |
511 |
> |
int sun_in_sky; |
512 |
> |
/* compute solar position */ |
513 |
> |
if ((mo == 2) & (da == 29)) { |
514 |
> |
julian_date = 60; |
515 |
> |
leap_day = 1; |
516 |
> |
} else |
517 |
> |
julian_date = jdate(mo, da) + leap_day; |
518 |
> |
sda = sdec(julian_date); |
519 |
> |
sta = stadj(julian_date); |
520 |
> |
st = hr + sta; |
521 |
> |
|
522 |
> |
if (timeinterval > 0) { |
523 |
> |
if (fabs(solar_sunrise(mo, da) - st) <= timeinterval/120) |
524 |
> |
st = (st + timeinterval/120 + solar_sunrise(mo, da))/2; |
525 |
> |
else if (fabs(solar_sunset(mo, da) - st) < timeinterval/120) |
526 |
> |
st = (st - timeinterval/120 + solar_sunset(mo, da))/2; |
527 |
> |
} |
528 |
> |
altitude = salt(sda, st); |
529 |
> |
sun_in_sky = (altitude > -DegToRad(SUN_ANG_DEG/2.)); |
530 |
> |
if (sun_hours_only && !sun_in_sky) |
531 |
> |
continue; /* skipping nighttime points */ |
532 |
> |
azimuth = sazi(sda, st) + PI - DegToRad(rotation); |
533 |
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|
534 |
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mtx_offset = 3*nskypatch*nstored; |
535 |
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nstored += !avgSky | !nstored; |
539 |
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mtx_data = resize_dmatrix(mtx_data, tstorage, nskypatch); |
540 |
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} |
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ntsteps++; /* keep count of time steps */ |
510 |
– |
/* compute solar position */ |
511 |
– |
if ((mo == 2) & (da == 29)) { |
512 |
– |
julian_date = 60; |
513 |
– |
leap_day = 1; |
514 |
– |
} else |
515 |
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julian_date = jdate(mo, da) + leap_day; |
516 |
– |
sda = sdec(julian_date); |
517 |
– |
sta = stadj(julian_date); |
518 |
– |
altitude = salt(sda, hr+sta); |
519 |
– |
azimuth = sazi(sda, hr+sta) + PI - DegToRad(rotation); |
542 |
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|
543 |
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if (dir+dif <= 1e-4) { /* effectively nighttime? */ |
544 |
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if (!avgSky | !mtx_offset) |
545 |
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memset(mtx_data+mtx_offset, 0, |
546 |
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sizeof(float)*3*nskypatch); |
547 |
< |
if (sunsfp) /* output black sun */ |
547 |
> |
/* output black sun? */ |
548 |
> |
if (sunsfp && sun_in_sky) |
549 |
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OutputSun(solar_minute(julian_date,hr), 0, |
550 |
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sunsfp, modsfp); |
551 |
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continue; |
552 |
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} |
553 |
+ |
if (!sun_in_sky && dir > (input==1 ? 20. : 20.*WHTEFFICACY)) |
554 |
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fprintf(stderr, |
555 |
+ |
"%s: warning - unusually bright at %.1f on %d-%d\n", |
556 |
+ |
progname, hr, mo, da); |
557 |
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/* convert measured values */ |
558 |
< |
if (dir_is_horiz && altitude > 0.) |
558 |
> |
if (dir_is_horiz && altitude > FTINY) |
559 |
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dir /= sin(altitude); |
560 |
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if (input == 1) { |
561 |
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dir_irrad = dir; |
566 |
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} |
567 |
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/* compute sky patch values */ |
568 |
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ComputeSky(mtx_data+mtx_offset); |
569 |
< |
|
570 |
< |
if (sunsfp) /* output sun if requested */ |
569 |
> |
/* output sun if requested */ |
570 |
> |
if (sunsfp && sun_in_sky) |
571 |
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OutputSun(solar_minute(julian_date,hr), 1, |
572 |
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sunsfp, modsfp); |
573 |
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|
669 |
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fprintf(stderr, "%s: done.\n", progname); |
670 |
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exit(0); |
671 |
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userr: |
672 |
< |
fprintf(stderr, "Usage: %s [-v][-h][-A][-d|-s|-n][-D file][-r deg][-m N][-g r g b][-c r g b][-o{f|d}][-O{0|1}] [tape.wea]\n", |
672 |
> |
fprintf(stderr, "Usage: %s [-v][-h][-A][-d|-s|-n][-u][-D file [-M modfile]][-r deg][-m N][-g r g b][-c r g b][-o{f|d}][-O{0|1}] [tape.wea]\n", |
673 |
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progname); |
674 |
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exit(1); |
675 |
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fmterr: |
680 |
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exit(1); |
681 |
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} |
682 |
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|
683 |
+ |
|
684 |
|
/* Return maximum of two doubles */ |
685 |
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double dmax( double a, double b ) |
686 |
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{ return (a > b) ? a : b; } |
726 |
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/* Limit sky clearness */ |
727 |
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if (sky_clearness > 11.9) |
728 |
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sky_clearness = 11.9; |
729 |
+ |
else if (sky_clearness < 1.0) |
730 |
+ |
sky_clearness = 1.0; |
731 |
|
|
732 |
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/* Limit sky brightness */ |
733 |
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if (sky_brightness < 0.01) |
734 |
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sky_brightness = 0.01; |
735 |
+ |
else if (sky_brightness > 0.6) |
736 |
+ |
sky_brightness = 0.6; |
737 |
|
|
738 |
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/* Calculate illuminance */ |
739 |
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index = GetCategoryIndex(); |
786 |
|
} |
787 |
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} |
788 |
|
|
789 |
+ |
|
790 |
+ |
double |
791 |
+ |
solar_sunset(int month, int day) |
792 |
+ |
{ |
793 |
+ |
float W; |
794 |
+ |
W = -1 * (tan(s_latitude) * tan(sdec(jdate(month, day)))); |
795 |
+ |
return(12 + (M_PI / 2 - atan2(W, sqrt(1 - W * W))) * 180 / (M_PI * 15)); |
796 |
+ |
} |
797 |
+ |
|
798 |
+ |
|
799 |
+ |
double |
800 |
+ |
solar_sunrise(int month, int day) |
801 |
+ |
{ |
802 |
+ |
float W; |
803 |
+ |
W = -1 * (tan(s_latitude) * tan(sdec(jdate(month, day)))); |
804 |
+ |
return(12 - (M_PI / 2 - atan2(W, sqrt(1 - W * W))) * 180 / (M_PI * 15)); |
805 |
+ |
} |
806 |
+ |
|
807 |
+ |
|
808 |
|
/* Add in solar direct to nearest sky patches (GW) */ |
809 |
|
void |
810 |
|
AddDirect(float *parr) |
865 |
|
FVECT sv; |
866 |
|
|
867 |
|
srad = DegToRad(SUN_ANG_DEG/2.); |
817 |
– |
|
818 |
– |
if (altitude < -srad) /* well below horizon? */ |
819 |
– |
return; |
820 |
– |
|
868 |
|
srad = goodsun ? dir_illum/(WHTEFFICACY * PI*srad*srad) : 0; |
869 |
|
vector(sv, altitude, azimuth); |
870 |
|
fprintf(fp, "\nvoid light solar%d\n0\n0\n", id); |
1074 |
|
if (sky_brightness < 0.01) |
1075 |
|
sky_brightness = 0.01; |
1076 |
|
|
1077 |
+ |
if (sky_clearness < 1.0000) |
1078 |
+ |
{ |
1079 |
+ |
sky_clearness = 1.0000; |
1080 |
+ |
} |
1081 |
+ |
|
1082 |
+ |
if (sky_brightness > 0.6) |
1083 |
+ |
{ |
1084 |
+ |
sky_brightness = 0.6; |
1085 |
+ |
} |
1086 |
+ |
|
1087 |
|
while (((fabs(diff_irrad - test1) > 10.0) || |
1088 |
|
(fabs(dir_irrad - test2) > 10.0)) && !(counter == 5)) |
1089 |
|
{ |
1109 |
|
/* Limit sky brightness */ |
1110 |
|
if (sky_brightness < 0.01) |
1111 |
|
sky_brightness = 0.01; |
1112 |
+ |
|
1113 |
+ |
if (sky_clearness < 1.0000) |
1114 |
+ |
{ |
1115 |
+ |
sky_clearness = 1.0000; |
1116 |
+ |
} |
1117 |
+ |
|
1118 |
+ |
if (sky_brightness > 0.6) |
1119 |
+ |
{ |
1120 |
+ |
sky_brightness = 0.6; |
1121 |
+ |
} |
1122 |
|
} |
1123 |
|
|
1124 |
|
return GetCategoryIndex(); |