89 |
|
#include "color.h" |
90 |
|
#include "sun.h" |
91 |
|
|
92 |
< |
char *progname; /* Program name */ |
93 |
< |
char errmsg[128]; /* Error message buffer */ |
92 |
> |
char *progname; /* Program name */ |
93 |
|
const double DC_SolarConstantE = 1367.0; /* Solar constant W/m^2 */ |
94 |
|
const double DC_SolarConstantL = 127.5; /* Solar constant klux */ |
95 |
|
|
128 |
|
extern void CalcSkyPatchLumin( float *parr ); |
129 |
|
extern void ComputeSky( float *parr ); |
130 |
|
|
131 |
+ |
|
132 |
+ |
extern double solar_sunset(int month, int day); |
133 |
+ |
extern double solar_sunrise(int month, int day); |
134 |
+ |
|
135 |
|
/* Degrees into radians */ |
136 |
|
#define DegToRad(deg) ((deg)*(PI/180.)) |
137 |
|
|
138 |
|
/* Radiuans into degrees */ |
139 |
|
#define RadToDeg(rad) ((rad)*(180./PI)) |
140 |
|
|
138 |
– |
|
141 |
|
/* Perez sky model coefficients */ |
142 |
|
|
143 |
|
/* Reference: Perez, R., R. Seals, and J. Michalsky, 1993. "All- */ |
254 |
|
#define NSUNPATCH 4 /* max. # patches to spread sun into */ |
255 |
|
#endif |
256 |
|
|
257 |
+ |
#define SUN_ANG_DEG 0.533 /* sun full-angle in degrees */ |
258 |
+ |
|
259 |
|
int nsuns = NSUNPATCH; /* number of sun patches to use */ |
260 |
|
double fixed_sun_sa = -1; /* fixed solid angle per sun? */ |
261 |
|
|
274 |
|
float *rh_pazi; /* sky patch azimuths (radians) */ |
275 |
|
float *rh_dom; /* sky patch solid angle (sr) */ |
276 |
|
|
277 |
< |
#define vector(v,alt,azi) ( (v)[1] = tcos(alt), \ |
278 |
< |
(v)[0] = (v)[1]*tsin(azi), \ |
279 |
< |
(v)[1] *= tcos(azi), \ |
280 |
< |
(v)[2] = tsin(alt) ) |
277 |
> |
#define vector(v,alt,azi) ( (v)[1] = cos(alt), \ |
278 |
> |
(v)[0] = (v)[1]*sin(azi), \ |
279 |
> |
(v)[1] *= cos(azi), \ |
280 |
> |
(v)[2] = sin(alt) ) |
281 |
|
|
282 |
|
#define rh_vector(v,i) vector(v,rh_palt[i],rh_pazi[i]) |
283 |
|
|
284 |
|
#define rh_cos(i) tsin(rh_palt[i]) |
285 |
|
|
286 |
+ |
#define solar_minute(jd,hr) ((24*60)*((jd)-1)+(int)((hr)*60.+.5)) |
287 |
+ |
|
288 |
|
extern int rh_init(void); |
289 |
|
extern float * resize_dmatrix(float *mtx_data, int nsteps, int npatch); |
290 |
+ |
extern void OutputSun(int id, int goodsun, FILE *fp, FILE *mfp); |
291 |
|
extern void AddDirect(float *parr); |
292 |
|
|
293 |
|
|
313 |
|
int doheader = 1; /* output header? */ |
314 |
|
double rotation = 0; /* site rotation (degrees) */ |
315 |
|
double elevation; /* site elevation (meters) */ |
316 |
+ |
int leap_day = 0; /* add leap day? */ |
317 |
+ |
int sun_hours_only = 0; /* only output sun hours? */ |
318 |
|
int dir_is_horiz; /* direct is meas. on horizontal? */ |
319 |
|
FILE *sunsfp = NULL; /* output file for individual suns */ |
320 |
+ |
FILE *modsfp = NULL; /* modifier output file */ |
321 |
|
float *mtx_data = NULL; /* our matrix data */ |
322 |
|
int avgSky = 0; /* compute average sky r.t. matrix? */ |
323 |
|
int ntsteps = 0; /* number of time steps */ |
329 |
|
double dir, dif; /* direct and diffuse values */ |
330 |
|
int mtx_offset; |
331 |
|
int i, j; |
332 |
+ |
double timeinterval = 0; |
333 |
|
|
334 |
|
progname = argv[0]; |
335 |
|
/* get options */ |
379 |
|
skycolor[1] = atof(argv[++i]); |
380 |
|
skycolor[2] = atof(argv[++i]); |
381 |
|
break; |
382 |
+ |
case 'D': /* output suns to file */ |
383 |
+ |
if (strcmp(argv[++i], "-")) { |
384 |
+ |
sunsfp = fopen(argv[i], "w"); |
385 |
+ |
if (sunsfp == NULL) { |
386 |
+ |
fprintf(stderr, |
387 |
+ |
"%s: cannot open '%s' for output\n", |
388 |
+ |
progname, argv[i]); |
389 |
+ |
exit(1); |
390 |
+ |
} |
391 |
+ |
break; /* still may output matrix */ |
392 |
+ |
} |
393 |
+ |
sunsfp = stdout; /* sending to stdout, so... */ |
394 |
+ |
/* fall through */ |
395 |
|
case 'n': /* no matrix output */ |
396 |
|
avgSky = -1; |
397 |
|
rhsubdiv = 1; |
400 |
|
skycolor[0] = skycolor[1] = skycolor[2] = 0; |
401 |
|
grefl[0] = grefl[1] = grefl[2] = 0; |
402 |
|
break; |
403 |
< |
case 'D': /* output suns to file */ |
404 |
< |
sunsfp = fopen(argv[++i], "w"); |
381 |
< |
if (!sunsfp) { |
403 |
> |
case 'M': /* send sun modifiers to file */ |
404 |
> |
if ((modsfp = fopen(argv[++i], "w")) == NULL) { |
405 |
|
fprintf(stderr, "%s: cannot open '%s' for output\n", |
406 |
< |
argv[0], argv[i]); |
406 |
> |
progname, argv[i]); |
407 |
|
exit(1); |
408 |
|
} |
386 |
– |
fixed_sun_sa = PI/360.*0.533; |
387 |
– |
fixed_sun_sa *= PI*fixed_sun_sa; |
409 |
|
break; |
410 |
|
case 's': /* sky only (no direct) */ |
411 |
|
suncolor[0] = suncolor[1] = suncolor[2] = 0; |
412 |
|
break; |
413 |
+ |
case 'u': /* solar hours only */ |
414 |
+ |
sun_hours_only = 1; |
415 |
+ |
break; |
416 |
|
case 'r': /* rotate distribution */ |
417 |
|
if (argv[i][2] && argv[i][2] != 'z') |
418 |
|
goto userr; |
423 |
|
fixed_sun_sa = PI/360.*atof(argv[++i]); |
424 |
|
if (fixed_sun_sa <= 0) { |
425 |
|
fprintf(stderr, "%s: missing solar disk size argument for '-5' option\n", |
426 |
< |
argv[0]); |
426 |
> |
progname); |
427 |
|
exit(1); |
428 |
|
} |
429 |
|
fixed_sun_sa *= fixed_sun_sa*PI; |
431 |
|
case 'A': /* compute average sky */ |
432 |
|
avgSky = 1; |
433 |
|
break; |
434 |
+ |
case 'i': |
435 |
+ |
timeinterval = atof(argv[++i]); |
436 |
+ |
break; |
437 |
|
default: |
438 |
|
goto userr; |
439 |
|
} |
444 |
|
progname, argv[i]); |
445 |
|
exit(1); |
446 |
|
} |
447 |
+ |
if ((modsfp != NULL) & (sunsfp == NULL)) |
448 |
+ |
fprintf(stderr, "%s: warning -M output will be empty without -D\n", |
449 |
+ |
progname); |
450 |
|
if (verbose) { |
451 |
|
if (i == argc-1) |
452 |
|
fprintf(stderr, "%s: reading weather tape '%s'\n", |
489 |
|
fprintf(stderr, "%s: location '%s'\n", progname, buf); |
490 |
|
fprintf(stderr, "%s: (lat,long)=(%.1f,%.1f) degrees north, west\n", |
491 |
|
progname, s_latitude, s_longitude); |
492 |
< |
fprintf(stderr, "%s: %d sky patches per time step\n", |
493 |
< |
progname, nskypatch); |
492 |
> |
if (avgSky >= 0) |
493 |
> |
fprintf(stderr, "%s: %d sky patches\n", |
494 |
> |
progname, nskypatch); |
495 |
> |
if (sunsfp) |
496 |
> |
fprintf(stderr, "%s: outputting suns to %s\n", |
497 |
> |
progname, sunsfp==stdout ? "stdout" : "file"); |
498 |
|
if (rotation != 0) |
499 |
|
fprintf(stderr, "%s: rotating output %.0f degrees\n", |
500 |
|
progname, rotation); |
507 |
|
mtx_data = resize_dmatrix(mtx_data, tstorage=2, nskypatch); |
508 |
|
/* process each time step in tape */ |
509 |
|
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 |
|
|
534 |
|
mtx_offset = 3*nskypatch*nstored; |
535 |
|
nstored += !avgSky | !nstored; |
539 |
|
mtx_data = resize_dmatrix(mtx_data, tstorage, nskypatch); |
540 |
|
} |
541 |
|
ntsteps++; /* keep count of time steps */ |
542 |
< |
if (dif <= 1e-4) { |
542 |
> |
|
543 |
> |
if (dir+dif <= 1e-4) { /* effectively nighttime? */ |
544 |
|
if (!avgSky | !mtx_offset) |
545 |
< |
memset(mtx_data+mtx_offset, 0, sizeof(float)*3*nskypatch); |
545 |
> |
memset(mtx_data+mtx_offset, 0, |
546 |
> |
sizeof(float)*3*nskypatch); |
547 |
> |
/* output black sun? */ |
548 |
> |
if (sunsfp && sun_in_sky) |
549 |
> |
OutputSun(solar_minute(julian_date,hr), 0, |
550 |
> |
sunsfp, modsfp); |
551 |
|
continue; |
552 |
|
} |
553 |
< |
/* compute solar position */ |
554 |
< |
julian_date = jdate(mo, da); |
555 |
< |
sda = sdec(julian_date); |
556 |
< |
sta = stadj(julian_date); |
495 |
< |
altitude = salt(sda, hr+sta); |
496 |
< |
azimuth = sazi(sda, hr+sta) + PI - DegToRad(rotation); |
553 |
> |
if (!sun_in_sky && dir > (input==1 ? 20. : 20.*WHTEFFICACY)) |
554 |
> |
fprintf(stderr, |
555 |
> |
"%s: warning - unusually bright at %.1f on %d-%d\n", |
556 |
> |
progname, hr, mo, da); |
557 |
|
/* convert measured values */ |
558 |
< |
if (dir_is_horiz && altitude > 0.) |
558 |
> |
if (dir_is_horiz && altitude > FTINY) |
559 |
|
dir /= sin(altitude); |
560 |
|
if (input == 1) { |
561 |
|
dir_irrad = dir; |
566 |
|
} |
567 |
|
/* compute sky patch values */ |
568 |
|
ComputeSky(mtx_data+mtx_offset); |
569 |
< |
/* output sun if indicated */ |
570 |
< |
if (sunsfp && (altitude > 0) & (dir_illum > 1e-4)) { |
571 |
< |
double srad = dir_illum/(WHTEFFICACY * fixed_sun_sa); |
572 |
< |
FVECT sv; |
573 |
< |
vector(sv, altitude, azimuth); |
514 |
< |
fprintf(sunsfp, "\nvoid light solar%d\n0\n0\n", ntsteps); |
515 |
< |
fprintf(sunsfp, "3 %.3e %.3e %.3e\n", srad*suncolor[0], |
516 |
< |
srad*suncolor[1], srad*suncolor[2]); |
517 |
< |
fprintf(sunsfp, "\nsolar%d source sun%d\n0\n0\n", ntsteps, ntsteps); |
518 |
< |
fprintf(sunsfp, "4 %.6f %.6f %.6f 0.533\n", sv[0], sv[1], sv[2]); |
519 |
< |
} |
569 |
> |
/* output sun if requested */ |
570 |
> |
if (sunsfp && sun_in_sky) |
571 |
> |
OutputSun(solar_minute(julian_date,hr), 1, |
572 |
> |
sunsfp, modsfp); |
573 |
> |
|
574 |
|
if (avgSky < 0) /* no matrix? */ |
575 |
|
continue; |
576 |
|
|
582 |
|
if (verbose && mo != last_monthly) |
583 |
|
fprintf(stderr, "%s: stepping through month %d...\n", |
584 |
|
progname, last_monthly=mo); |
585 |
+ |
/* note whether leap-day was given */ |
586 |
|
} |
587 |
|
if (!ntsteps) { |
588 |
|
fprintf(stderr, "%s: no valid time steps on input\n", progname); |
669 |
|
fprintf(stderr, "%s: done.\n", progname); |
670 |
|
exit(0); |
671 |
|
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 |
|
progname); |
674 |
|
exit(1); |
675 |
|
fmterr: |
680 |
|
exit(1); |
681 |
|
} |
682 |
|
|
683 |
+ |
|
684 |
|
/* Return maximum of two doubles */ |
685 |
|
double dmax( double a, double b ) |
686 |
|
{ return (a > b) ? a : b; } |
726 |
|
/* Limit sky clearness */ |
727 |
|
if (sky_clearness > 11.9) |
728 |
|
sky_clearness = 11.9; |
729 |
+ |
else if (sky_clearness < 1.0) |
730 |
+ |
sky_clearness = 1.0; |
731 |
|
|
732 |
|
/* Limit sky brightness */ |
733 |
|
if (sky_brightness < 0.01) |
734 |
|
sky_brightness = 0.01; |
735 |
+ |
else if (sky_brightness > 0.6) |
736 |
+ |
sky_brightness = 0.6; |
737 |
|
|
738 |
|
/* Calculate illuminance */ |
739 |
|
index = GetCategoryIndex(); |
786 |
|
} |
787 |
|
} |
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) |
857 |
|
} |
858 |
|
} |
859 |
|
|
860 |
+ |
/* Output a sun to indicated file if appropriate for this time step */ |
861 |
+ |
void |
862 |
+ |
OutputSun(int id, int goodsun, FILE *fp, FILE *mfp) |
863 |
+ |
{ |
864 |
+ |
double srad; |
865 |
+ |
FVECT sv; |
866 |
+ |
|
867 |
+ |
srad = DegToRad(SUN_ANG_DEG/2.); |
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); |
871 |
+ |
fprintf(fp, "3 %.3e %.3e %.3e\n", srad*suncolor[0], |
872 |
+ |
srad*suncolor[1], srad*suncolor[2]); |
873 |
+ |
fprintf(fp, "\nsolar%d source sun%d\n0\n0\n", id, id); |
874 |
+ |
fprintf(fp, "4 %.6f %.6f %.6f %.4f\n", sv[0], sv[1], sv[2], SUN_ANG_DEG); |
875 |
+ |
|
876 |
+ |
if (mfp != NULL) /* saving modifier IDs? */ |
877 |
+ |
fprintf(mfp, "solar%d\n", id); |
878 |
+ |
} |
879 |
+ |
|
880 |
|
/* Initialize Reinhart sky patch positions (GW) */ |
881 |
|
int |
882 |
|
rh_init(void) |
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(); |