| 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 |
|
|
| 134 |
|
/* Radiuans into degrees */ |
| 135 |
|
#define RadToDeg(rad) ((rad)*(180./PI)) |
| 136 |
|
|
| 138 |
– |
|
| 137 |
|
/* Perez sky model coefficients */ |
| 138 |
|
|
| 139 |
|
/* Reference: Perez, R., R. Seals, and J. Michalsky, 1993. "All- */ |
| 270 |
|
float *rh_pazi; /* sky patch azimuths (radians) */ |
| 271 |
|
float *rh_dom; /* sky patch solid angle (sr) */ |
| 272 |
|
|
| 273 |
< |
#define vector(v,alt,azi) ( (v)[1] = tcos(alt), \ |
| 274 |
< |
(v)[0] = (v)[1]*tsin(azi), \ |
| 275 |
< |
(v)[1] *= tcos(azi), \ |
| 276 |
< |
(v)[2] = tsin(alt) ) |
| 273 |
> |
#define vector(v,alt,azi) ( (v)[1] = cos(alt), \ |
| 274 |
> |
(v)[0] = (v)[1]*sin(azi), \ |
| 275 |
> |
(v)[1] *= cos(azi), \ |
| 276 |
> |
(v)[2] = sin(alt) ) |
| 277 |
|
|
| 278 |
|
#define rh_vector(v,i) vector(v,rh_palt[i],rh_pazi[i]) |
| 279 |
|
|
| 280 |
|
#define rh_cos(i) tsin(rh_palt[i]) |
| 281 |
|
|
| 282 |
+ |
#define solar_minute(jd,hr) ((24*60)*((jd)-1)+(int)((hr)*60.+.5)) |
| 283 |
+ |
|
| 284 |
|
extern int rh_init(void); |
| 285 |
|
extern float * resize_dmatrix(float *mtx_data, int nsteps, int npatch); |
| 286 |
< |
extern void OutputSun(int id, FILE *fp); |
| 286 |
> |
extern void OutputSun(int id, int goodsun, FILE *fp, FILE *mfp); |
| 287 |
|
extern void AddDirect(float *parr); |
| 288 |
|
|
| 289 |
|
|
| 309 |
|
int doheader = 1; /* output header? */ |
| 310 |
|
double rotation = 0; /* site rotation (degrees) */ |
| 311 |
|
double elevation; /* site elevation (meters) */ |
| 312 |
+ |
int leap_day = 0; /* add leap day? */ |
| 313 |
+ |
int sun_hours_only = 0; /* only output sun hours? */ |
| 314 |
|
int dir_is_horiz; /* direct is meas. on horizontal? */ |
| 315 |
|
FILE *sunsfp = NULL; /* output file for individual suns */ |
| 316 |
+ |
FILE *modsfp = NULL; /* modifier output file */ |
| 317 |
|
float *mtx_data = NULL; /* our matrix data */ |
| 318 |
|
int avgSky = 0; /* compute average sky r.t. matrix? */ |
| 319 |
|
int ntsteps = 0; /* number of time steps */ |
| 374 |
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skycolor[1] = atof(argv[++i]); |
| 375 |
|
skycolor[2] = atof(argv[++i]); |
| 376 |
|
break; |
| 377 |
+ |
case 'D': /* output suns to file */ |
| 378 |
+ |
if (strcmp(argv[++i], "-")) { |
| 379 |
+ |
sunsfp = fopen(argv[i], "w"); |
| 380 |
+ |
if (sunsfp == NULL) { |
| 381 |
+ |
fprintf(stderr, |
| 382 |
+ |
"%s: cannot open '%s' for output\n", |
| 383 |
+ |
progname, argv[i]); |
| 384 |
+ |
exit(1); |
| 385 |
+ |
} |
| 386 |
+ |
break; /* still may output matrix */ |
| 387 |
+ |
} |
| 388 |
+ |
sunsfp = stdout; /* sending to stdout, so... */ |
| 389 |
+ |
/* fall through */ |
| 390 |
|
case 'n': /* no matrix output */ |
| 391 |
|
avgSky = -1; |
| 392 |
|
rhsubdiv = 1; |
| 395 |
|
skycolor[0] = skycolor[1] = skycolor[2] = 0; |
| 396 |
|
grefl[0] = grefl[1] = grefl[2] = 0; |
| 397 |
|
break; |
| 398 |
< |
case 'D': /* output suns to file */ |
| 399 |
< |
sunsfp = fopen(argv[++i], "w"); |
| 384 |
< |
if (!sunsfp) { |
| 398 |
> |
case 'M': /* send sun modifiers to file */ |
| 399 |
> |
if ((modsfp = fopen(argv[++i], "w")) == NULL) { |
| 400 |
|
fprintf(stderr, "%s: cannot open '%s' for output\n", |
| 401 |
|
progname, argv[i]); |
| 402 |
|
exit(1); |
| 405 |
|
case 's': /* sky only (no direct) */ |
| 406 |
|
suncolor[0] = suncolor[1] = suncolor[2] = 0; |
| 407 |
|
break; |
| 408 |
+ |
case 'u': /* solar hours only */ |
| 409 |
+ |
sun_hours_only = 1; |
| 410 |
+ |
break; |
| 411 |
|
case 'r': /* rotate distribution */ |
| 412 |
|
if (argv[i][2] && argv[i][2] != 'z') |
| 413 |
|
goto userr; |
| 436 |
|
progname, argv[i]); |
| 437 |
|
exit(1); |
| 438 |
|
} |
| 439 |
+ |
if ((modsfp != NULL) & (sunsfp == NULL)) |
| 440 |
+ |
fprintf(stderr, "%s: warning -M output will be empty without -D\n", |
| 441 |
+ |
progname); |
| 442 |
|
if (verbose) { |
| 443 |
|
if (i == argc-1) |
| 444 |
|
fprintf(stderr, "%s: reading weather tape '%s'\n", |
| 485 |
|
fprintf(stderr, "%s: %d sky patches\n", |
| 486 |
|
progname, nskypatch); |
| 487 |
|
if (sunsfp) |
| 488 |
< |
fprintf(stderr, "%s: outputting suns to file\n", |
| 489 |
< |
progname); |
| 488 |
> |
fprintf(stderr, "%s: outputting suns to %s\n", |
| 489 |
> |
progname, sunsfp==stdout ? "stdout" : "file"); |
| 490 |
|
if (rotation != 0) |
| 491 |
|
fprintf(stderr, "%s: rotating output %.0f degrees\n", |
| 492 |
|
progname, rotation); |
| 500 |
|
/* process each time step in tape */ |
| 501 |
|
while (scanf("%d %d %lf %lf %lf\n", &mo, &da, &hr, &dir, &dif) == 5) { |
| 502 |
|
double sda, sta; |
| 503 |
+ |
int sun_in_sky; |
| 504 |
+ |
/* compute solar position */ |
| 505 |
+ |
if ((mo == 2) & (da == 29)) { |
| 506 |
+ |
julian_date = 60; |
| 507 |
+ |
leap_day = 1; |
| 508 |
+ |
} else |
| 509 |
+ |
julian_date = jdate(mo, da) + leap_day; |
| 510 |
+ |
sda = sdec(julian_date); |
| 511 |
+ |
sta = stadj(julian_date); |
| 512 |
+ |
altitude = salt(sda, hr+sta); |
| 513 |
+ |
sun_in_sky = (altitude > -DegToRad(SUN_ANG_DEG/2.)); |
| 514 |
+ |
if (sun_hours_only && !sun_in_sky) |
| 515 |
+ |
continue; /* skipping nighttime points */ |
| 516 |
+ |
azimuth = sazi(sda, hr+sta) + PI - DegToRad(rotation); |
| 517 |
|
|
| 518 |
|
mtx_offset = 3*nskypatch*nstored; |
| 519 |
|
nstored += !avgSky | !nstored; |
| 523 |
|
mtx_data = resize_dmatrix(mtx_data, tstorage, nskypatch); |
| 524 |
|
} |
| 525 |
|
ntsteps++; /* keep count of time steps */ |
| 526 |
< |
if (dif <= 1e-4) { |
| 526 |
> |
|
| 527 |
> |
if (dir+dif <= 1e-4) { /* effectively nighttime? */ |
| 528 |
|
if (!avgSky | !mtx_offset) |
| 529 |
< |
memset(mtx_data+mtx_offset, 0, sizeof(float)*3*nskypatch); |
| 529 |
> |
memset(mtx_data+mtx_offset, 0, |
| 530 |
> |
sizeof(float)*3*nskypatch); |
| 531 |
> |
/* output black sun? */ |
| 532 |
> |
if (sunsfp && sun_in_sky) |
| 533 |
> |
OutputSun(solar_minute(julian_date,hr), 0, |
| 534 |
> |
sunsfp, modsfp); |
| 535 |
|
continue; |
| 536 |
|
} |
| 537 |
< |
/* compute solar position */ |
| 538 |
< |
julian_date = jdate(mo, da); |
| 539 |
< |
sda = sdec(julian_date); |
| 540 |
< |
sta = stadj(julian_date); |
| 500 |
< |
altitude = salt(sda, hr+sta); |
| 501 |
< |
azimuth = sazi(sda, hr+sta) + PI - DegToRad(rotation); |
| 537 |
> |
if (!sun_in_sky && dir > (input==1 ? 20. : 20.*WHTEFFICACY)) |
| 538 |
> |
fprintf(stderr, |
| 539 |
> |
"%s: warning - unusually bright at %.1f on %d-%d\n", |
| 540 |
> |
progname, hr, mo, da); |
| 541 |
|
/* convert measured values */ |
| 542 |
< |
if (dir_is_horiz && altitude > 0.) |
| 542 |
> |
if (dir_is_horiz && altitude > FTINY) |
| 543 |
|
dir /= sin(altitude); |
| 544 |
|
if (input == 1) { |
| 545 |
|
dir_irrad = dir; |
| 550 |
|
} |
| 551 |
|
/* compute sky patch values */ |
| 552 |
|
ComputeSky(mtx_data+mtx_offset); |
| 553 |
+ |
/* output sun if requested */ |
| 554 |
+ |
if (sunsfp && sun_in_sky) |
| 555 |
+ |
OutputSun(solar_minute(julian_date,hr), 1, |
| 556 |
+ |
sunsfp, modsfp); |
| 557 |
|
|
| 515 |
– |
if (sunsfp) /* output sun if indicated */ |
| 516 |
– |
OutputSun(ntsteps, sunsfp); |
| 517 |
– |
|
| 558 |
|
if (avgSky < 0) /* no matrix? */ |
| 559 |
|
continue; |
| 560 |
|
|
| 566 |
|
if (verbose && mo != last_monthly) |
| 567 |
|
fprintf(stderr, "%s: stepping through month %d...\n", |
| 568 |
|
progname, last_monthly=mo); |
| 569 |
+ |
/* note whether leap-day was given */ |
| 570 |
|
} |
| 571 |
|
if (!ntsteps) { |
| 572 |
|
fprintf(stderr, "%s: no valid time steps on input\n", progname); |
| 653 |
|
fprintf(stderr, "%s: done.\n", progname); |
| 654 |
|
exit(0); |
| 655 |
|
userr: |
| 656 |
< |
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", |
| 656 |
> |
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", |
| 657 |
|
progname); |
| 658 |
|
exit(1); |
| 659 |
|
fmterr: |
| 819 |
|
|
| 820 |
|
/* Output a sun to indicated file if appropriate for this time step */ |
| 821 |
|
void |
| 822 |
< |
OutputSun(int id, FILE *fp) |
| 822 |
> |
OutputSun(int id, int goodsun, FILE *fp, FILE *mfp) |
| 823 |
|
{ |
| 824 |
|
double srad; |
| 825 |
|
FVECT sv; |
| 826 |
|
|
| 786 |
– |
if ((altitude <= 0) | (dir_illum <= 1e-4)) |
| 787 |
– |
return; |
| 788 |
– |
|
| 827 |
|
srad = DegToRad(SUN_ANG_DEG/2.); |
| 828 |
< |
srad = dir_illum/(WHTEFFICACY * PI*srad*srad); |
| 828 |
> |
srad = goodsun ? dir_illum/(WHTEFFICACY * PI*srad*srad) : 0; |
| 829 |
|
vector(sv, altitude, azimuth); |
| 830 |
|
fprintf(fp, "\nvoid light solar%d\n0\n0\n", id); |
| 831 |
|
fprintf(fp, "3 %.3e %.3e %.3e\n", srad*suncolor[0], |
| 832 |
|
srad*suncolor[1], srad*suncolor[2]); |
| 833 |
|
fprintf(fp, "\nsolar%d source sun%d\n0\n0\n", id, id); |
| 834 |
|
fprintf(fp, "4 %.6f %.6f %.6f %.4f\n", sv[0], sv[1], sv[2], SUN_ANG_DEG); |
| 835 |
+ |
|
| 836 |
+ |
if (mfp != NULL) /* saving modifier IDs? */ |
| 837 |
+ |
fprintf(mfp, "solar%d\n", id); |
| 838 |
|
} |
| 839 |
|
|
| 840 |
|
/* Initialize Reinhart sky patch positions (GW) */ |