81 |
|
|
82 |
|
/* Include files */ |
83 |
|
#define _USE_MATH_DEFINES |
84 |
– |
#include <stdio.h> |
84 |
|
#include <stdlib.h> |
86 |
– |
#include <string.h> |
85 |
|
#include <ctype.h> |
86 |
+ |
#include "platform.h" |
87 |
|
#include "rtmath.h" |
88 |
+ |
#include "rtio.h" |
89 |
|
#include "color.h" |
90 |
+ |
#include "sun.h" |
91 |
|
|
92 |
|
char *progname; /* Program name */ |
93 |
|
char errmsg[128]; /* Error message buffer */ |
109 |
|
double solar_rad; /* Solar radiance */ |
110 |
|
double sun_zenith; /* Sun zenith angle (radians) */ |
111 |
|
int input = 0; /* Input type */ |
112 |
+ |
int output = 0; /* Output type */ |
113 |
|
|
114 |
|
extern double dmax( double, double ); |
115 |
|
extern double CalcAirMass(); |
210 |
|
{ 1.950, 2.800 }, |
211 |
|
{ 2.800, 4.500 }, |
212 |
|
{ 4.500, 6.200 }, |
213 |
< |
{ 6.200, 12.00 } /* Clear */ |
213 |
> |
{ 6.200, 12.01 } /* Clear */ |
214 |
|
}; |
215 |
|
|
216 |
|
/* Luminous efficacy model coefficients */ |
249 |
|
}; |
250 |
|
|
251 |
|
#ifndef NSUNPATCH |
252 |
< |
#define NSUNPATCH 4 /* # patches to spread sun into */ |
252 |
> |
#define NSUNPATCH 4 /* max. # patches to spread sun into */ |
253 |
|
#endif |
254 |
|
|
255 |
< |
extern int jdate(int month, int day); |
256 |
< |
extern double stadj(int jd); |
255 |
< |
extern double sdec(int jd); |
256 |
< |
extern double salt(double sd, double st); |
257 |
< |
extern double sazi(double sd, double st); |
258 |
< |
/* sun calculation constants */ |
259 |
< |
extern double s_latitude; |
260 |
< |
extern double s_longitude; |
261 |
< |
extern double s_meridian; |
255 |
> |
int nsuns = NSUNPATCH; /* number of sun patches to use */ |
256 |
> |
double fixed_sun_sa = -1; /* fixed solid angle per sun? */ |
257 |
|
|
258 |
|
int verbose = 0; /* progress reports to stderr? */ |
259 |
|
|
283 |
|
extern float * resize_dmatrix(float *mtx_data, int nsteps, int npatch); |
284 |
|
extern void AddDirect(float *parr); |
285 |
|
|
286 |
+ |
|
287 |
+ |
static const char * |
288 |
+ |
getfmtname(int fmt) |
289 |
+ |
{ |
290 |
+ |
switch (fmt) { |
291 |
+ |
case 'a': |
292 |
+ |
return("ascii"); |
293 |
+ |
case 'f': |
294 |
+ |
return("float"); |
295 |
+ |
case 'd': |
296 |
+ |
return("double"); |
297 |
+ |
} |
298 |
+ |
return("unknown"); |
299 |
+ |
} |
300 |
+ |
|
301 |
+ |
|
302 |
|
int |
303 |
|
main(int argc, char *argv[]) |
304 |
|
{ |
305 |
|
char buf[256]; |
306 |
+ |
int doheader = 1; /* output header? */ |
307 |
+ |
double rotation = 0; /* site rotation (degrees) */ |
308 |
|
double elevation; /* site elevation (meters) */ |
309 |
|
int dir_is_horiz; /* direct is meas. on horizontal? */ |
310 |
|
float *mtx_data = NULL; /* our matrix data */ |
311 |
< |
int ntsteps = 0; /* number of rows in matrix */ |
311 |
> |
int avgSky = 0; /* compute average sky r.t. matrix? */ |
312 |
> |
int ntsteps = 0; /* number of time steps */ |
313 |
> |
int tstorage = 0; /* number of allocated time steps */ |
314 |
> |
int nstored = 0; /* number of time steps in matrix */ |
315 |
|
int last_monthly = 0; /* month of last report */ |
316 |
|
int mo, da; /* month (1-12) and day (1-31) */ |
317 |
|
double hr; /* hour (local standard time) */ |
331 |
|
case 'v': /* verbose progress reports */ |
332 |
|
verbose++; |
333 |
|
break; |
334 |
+ |
case 'h': /* turn off header */ |
335 |
+ |
doheader = 0; |
336 |
+ |
break; |
337 |
|
case 'o': /* output format */ |
338 |
|
switch (argv[i][2]) { |
339 |
|
case 'f': |
345 |
|
goto userr; |
346 |
|
} |
347 |
|
break; |
348 |
+ |
case 'O': /* output type */ |
349 |
+ |
switch (argv[i][2]) { |
350 |
+ |
case '0': |
351 |
+ |
output = 0; |
352 |
+ |
break; |
353 |
+ |
case '1': |
354 |
+ |
output = 1; |
355 |
+ |
break; |
356 |
+ |
default: |
357 |
+ |
goto userr; |
358 |
+ |
} |
359 |
+ |
if (argv[i][3]) |
360 |
+ |
goto userr; |
361 |
+ |
break; |
362 |
|
case 'm': /* Reinhart subdivisions */ |
363 |
|
rhsubdiv = atoi(argv[++i]); |
364 |
|
break; |
369 |
|
break; |
370 |
|
case 'd': /* solar (direct) only */ |
371 |
|
skycolor[0] = skycolor[1] = skycolor[2] = 0; |
372 |
< |
if (suncolor[1] <= 1e-4) |
340 |
< |
suncolor[0] = suncolor[1] = suncolor[2] = 1; |
372 |
> |
grefl[0] = grefl[1] = grefl[2] = 0; |
373 |
|
break; |
374 |
|
case 's': /* sky only (no direct) */ |
375 |
|
suncolor[0] = suncolor[1] = suncolor[2] = 0; |
344 |
– |
if (skycolor[1] <= 1e-4) |
345 |
– |
skycolor[0] = skycolor[1] = skycolor[2] = 1; |
376 |
|
break; |
377 |
+ |
case 'r': /* rotate distribution */ |
378 |
+ |
if (argv[i][2] && argv[i][2] != 'z') |
379 |
+ |
goto userr; |
380 |
+ |
rotation = atof(argv[++i]); |
381 |
+ |
break; |
382 |
+ |
case '5': /* 5-phase calculation */ |
383 |
+ |
nsuns = 1; |
384 |
+ |
fixed_sun_sa = PI/360.*atof(argv[++i]); |
385 |
+ |
if (fixed_sun_sa <= 0) { |
386 |
+ |
fprintf(stderr, "%s: missing solar disk size argument for '-5' option\n", |
387 |
+ |
argv[0]); |
388 |
+ |
exit(1); |
389 |
+ |
} |
390 |
+ |
fixed_sun_sa *= fixed_sun_sa*PI; |
391 |
+ |
break; |
392 |
+ |
case 'A': /* compute average sky */ |
393 |
+ |
avgSky = 1; |
394 |
+ |
break; |
395 |
|
default: |
396 |
|
goto userr; |
397 |
|
} |
446 |
|
progname, s_latitude, s_longitude); |
447 |
|
fprintf(stderr, "%s: %d sky patches per time step\n", |
448 |
|
progname, nskypatch); |
449 |
+ |
if (rotation != 0) |
450 |
+ |
fprintf(stderr, "%s: rotating output %.0f degrees\n", |
451 |
+ |
progname, rotation); |
452 |
|
} |
453 |
|
/* convert quantities to radians */ |
454 |
|
s_latitude = DegToRad(s_latitude); |
455 |
|
s_longitude = DegToRad(s_longitude); |
456 |
|
s_meridian = DegToRad(s_meridian); |
457 |
+ |
/* initial allocation */ |
458 |
+ |
mtx_data = resize_dmatrix(mtx_data, tstorage=2, nskypatch); |
459 |
|
/* process each time step in tape */ |
460 |
|
while (scanf("%d %d %lf %lf %lf\n", &mo, &da, &hr, &dir, &dif) == 5) { |
461 |
|
double sda, sta; |
462 |
< |
/* make space for next time step */ |
463 |
< |
mtx_offset = 3*nskypatch*ntsteps++; |
464 |
< |
mtx_data = resize_dmatrix(mtx_data, ntsteps, nskypatch); |
462 |
> |
|
463 |
> |
mtx_offset = 3*nskypatch*nstored; |
464 |
> |
nstored += !avgSky | !nstored; |
465 |
> |
/* make space for next row */ |
466 |
> |
if (nstored > tstorage) { |
467 |
> |
tstorage += (tstorage>>1) + nstored + 7; |
468 |
> |
mtx_data = resize_dmatrix(mtx_data, tstorage, nskypatch); |
469 |
> |
} |
470 |
> |
ntsteps++; /* keep count of time steps */ |
471 |
|
if (dif <= 1e-4) { |
472 |
< |
memset(mtx_data+mtx_offset, 0, sizeof(float)*3*nskypatch); |
472 |
> |
if (!avgSky | !mtx_offset) |
473 |
> |
memset(mtx_data+mtx_offset, 0, sizeof(float)*3*nskypatch); |
474 |
|
continue; |
475 |
|
} |
476 |
|
if (verbose && mo != last_monthly) |
481 |
|
sda = sdec(julian_date); |
482 |
|
sta = stadj(julian_date); |
483 |
|
altitude = salt(sda, hr+sta); |
484 |
< |
azimuth = sazi(sda, hr+sta) + PI; |
484 |
> |
azimuth = sazi(sda, hr+sta) + PI - DegToRad(rotation); |
485 |
|
/* convert measured values */ |
486 |
|
if (dir_is_horiz && altitude > 0.) |
487 |
|
dir /= sin(altitude); |
495 |
|
/* compute sky patch values */ |
496 |
|
ComputeSky(mtx_data+mtx_offset); |
497 |
|
AddDirect(mtx_data+mtx_offset); |
498 |
+ |
/* update cumulative sky? */ |
499 |
+ |
for (i = 3*nskypatch*(avgSky&(ntsteps>1)); i--; ) |
500 |
+ |
mtx_data[i] += mtx_data[mtx_offset+i]; |
501 |
|
} |
502 |
|
/* check for junk at end */ |
503 |
|
while ((i = fgetc(stdin)) != EOF) |
509 |
|
fputs(buf, stderr); fputc('\n', stderr); |
510 |
|
break; |
511 |
|
} |
512 |
+ |
if (!ntsteps) { |
513 |
+ |
fprintf(stderr, "%s: no valid time steps on input\n", progname); |
514 |
+ |
exit(1); |
515 |
+ |
} |
516 |
+ |
dif = 1./(double)ntsteps; /* average sky? */ |
517 |
+ |
for (i = 3*nskypatch*(avgSky&(ntsteps>1)); i--; ) |
518 |
+ |
mtx_data[i] *= dif; |
519 |
|
/* write out matrix */ |
520 |
+ |
if (outfmt != 'a') |
521 |
+ |
SET_FILE_BINARY(stdout); |
522 |
|
#ifdef getc_unlocked |
523 |
|
flockfile(stdout); |
524 |
|
#endif |
525 |
|
if (verbose) |
526 |
|
fprintf(stderr, "%s: writing %smatrix with %d time steps...\n", |
527 |
< |
progname, outfmt=='a' ? "" : "binary ", ntsteps); |
527 |
> |
progname, outfmt=='a' ? "" : "binary ", nstored); |
528 |
> |
if (doheader) { |
529 |
> |
newheader("RADIANCE", stdout); |
530 |
> |
printargs(argc, argv, stdout); |
531 |
> |
printf("LATLONG= %.8f %.8f\n", RadToDeg(s_latitude), |
532 |
> |
-RadToDeg(s_longitude)); |
533 |
> |
printf("NROWS=%d\n", nskypatch); |
534 |
> |
printf("NCOLS=%d\n", nstored); |
535 |
> |
printf("NCOMP=3\n"); |
536 |
> |
if ((outfmt == 'f') | (outfmt == 'd')) |
537 |
> |
fputendian(stdout); |
538 |
> |
fputformat((char *)getfmtname(outfmt), stdout); |
539 |
> |
putchar('\n'); |
540 |
> |
} |
541 |
|
/* patches are rows (outer sort) */ |
542 |
|
for (i = 0; i < nskypatch; i++) { |
543 |
|
mtx_offset = 3*i; |
544 |
|
switch (outfmt) { |
545 |
|
case 'a': |
546 |
< |
for (j = 0; j < ntsteps; j++) { |
546 |
> |
for (j = 0; j < nstored; j++) { |
547 |
|
printf("%.3g %.3g %.3g\n", mtx_data[mtx_offset], |
548 |
|
mtx_data[mtx_offset+1], |
549 |
|
mtx_data[mtx_offset+2]); |
550 |
|
mtx_offset += 3*nskypatch; |
551 |
|
} |
552 |
< |
if (ntsteps > 1) |
552 |
> |
if (nstored > 1) |
553 |
|
fputc('\n', stdout); |
554 |
|
break; |
555 |
|
case 'f': |
556 |
< |
for (j = 0; j < ntsteps; j++) { |
557 |
< |
fwrite(mtx_data+mtx_offset, sizeof(float), 3, |
556 |
> |
for (j = 0; j < nstored; j++) { |
557 |
> |
putbinary(mtx_data+mtx_offset, sizeof(float), 3, |
558 |
|
stdout); |
559 |
|
mtx_offset += 3*nskypatch; |
560 |
|
} |
561 |
|
break; |
562 |
|
case 'd': |
563 |
< |
for (j = 0; j < ntsteps; j++) { |
563 |
> |
for (j = 0; j < nstored; j++) { |
564 |
|
double ment[3]; |
565 |
|
ment[0] = mtx_data[mtx_offset]; |
566 |
|
ment[1] = mtx_data[mtx_offset+1]; |
567 |
|
ment[2] = mtx_data[mtx_offset+2]; |
568 |
< |
fwrite(ment, sizeof(double), 3, stdout); |
568 |
> |
putbinary(ment, sizeof(double), 3, stdout); |
569 |
|
mtx_offset += 3*nskypatch; |
570 |
|
} |
571 |
|
break; |
579 |
|
fprintf(stderr, "%s: done.\n", progname); |
580 |
|
exit(0); |
581 |
|
userr: |
582 |
< |
fprintf(stderr, "Usage: %s [-v][-d|-s][-m N][-g r g b][-c r g b][-o{f|d}] [tape.wea]\n", |
582 |
> |
fprintf(stderr, "Usage: %s [-v][-h][-A][-d|-s][-r deg][-m N][-g r g b][-c r g b][-o{f|d}][-O{0|1}] [tape.wea]\n", |
583 |
|
progname); |
584 |
|
exit(1); |
585 |
|
fmterr: |
632 |
|
sky_brightness = CalcSkyBrightness(); |
633 |
|
sky_clearness = CalcSkyClearness(); |
634 |
|
|
635 |
+ |
/* Limit sky clearness */ |
636 |
+ |
if (sky_clearness > 11.9) |
637 |
+ |
sky_clearness = 11.9; |
638 |
+ |
|
639 |
+ |
/* Limit sky brightness */ |
640 |
+ |
if (sky_brightness < 0.01) |
641 |
+ |
sky_brightness = 0.01; |
642 |
+ |
|
643 |
|
/* Calculate illuminance */ |
644 |
|
index = GetCategoryIndex(); |
645 |
|
diff_illum = diff_irrad * CalcDiffuseIllumRatio(index); |
651 |
|
index = CalcSkyParamFromIllum(); |
652 |
|
} |
653 |
|
|
654 |
< |
if (bright(skycolor) <= 1e-4) { /* 0 sky component? */ |
655 |
< |
memset(parr, 0, sizeof(float)*3*nskypatch); |
656 |
< |
return; |
654 |
> |
if (output == 1) { /* hack for solar radiance */ |
655 |
> |
diff_illum = diff_irrad * WHTEFFICACY; |
656 |
> |
dir_illum = dir_irrad * WHTEFFICACY; |
657 |
|
} |
658 |
|
/* Compute ground radiance (include solar contribution if any) */ |
659 |
|
parr[0] = diff_illum; |
662 |
|
parr[2] = parr[1] = parr[0] *= (1./PI/WHTEFFICACY); |
663 |
|
multcolor(parr, grefl); |
664 |
|
|
665 |
+ |
if (bright(skycolor) <= 1e-4) { /* 0 sky component? */ |
666 |
+ |
memset(parr+3, 0, sizeof(float)*3*(nskypatch-1)); |
667 |
+ |
return; |
668 |
+ |
} |
669 |
|
/* Calculate Perez sky model parameters */ |
670 |
|
CalcPerezParam(sun_zenith, sky_clearness, sky_brightness, index); |
671 |
|
|
675 |
|
/* Calculate relative horizontal illuminance */ |
676 |
|
norm_diff_illum = CalcRelHorzIllum(parr); |
677 |
|
|
678 |
+ |
/* Check for zero sky -- make uniform in that case */ |
679 |
+ |
if (norm_diff_illum <= FTINY) { |
680 |
+ |
for (i = 1; i < nskypatch; i++) |
681 |
+ |
setcolor(parr+3*i, 1., 1., 1.); |
682 |
+ |
norm_diff_illum = PI; |
683 |
+ |
} |
684 |
|
/* Normalization coefficient */ |
685 |
|
norm_diff_illum = diff_illum / norm_diff_illum; |
686 |
|
|
703 |
|
|
704 |
|
if (dir_illum <= 1e-4 || bright(suncolor) <= 1e-4) |
705 |
|
return; |
706 |
< |
/* identify NSUNPATCH closest patches */ |
707 |
< |
for (i = NSUNPATCH; i--; ) |
706 |
> |
/* identify nsuns closest patches */ |
707 |
> |
if (nsuns > NSUNPATCH) |
708 |
> |
nsuns = NSUNPATCH; |
709 |
> |
else if (nsuns <= 0) |
710 |
> |
nsuns = 1; |
711 |
> |
for (i = nsuns; i--; ) |
712 |
|
near_dprod[i] = -1.; |
713 |
|
vector(svec, altitude, azimuth); |
714 |
|
for (p = 1; p < nskypatch; p++) { |
716 |
|
double dprod; |
717 |
|
rh_vector(pvec, p); |
718 |
|
dprod = DOT(pvec, svec); |
719 |
< |
for (i = 0; i < NSUNPATCH; i++) |
719 |
> |
for (i = 0; i < nsuns; i++) |
720 |
|
if (dprod > near_dprod[i]) { |
721 |
< |
for (j = NSUNPATCH; --j > i; ) { |
721 |
> |
for (j = nsuns; --j > i; ) { |
722 |
|
near_dprod[j] = near_dprod[j-1]; |
723 |
|
near_patch[j] = near_patch[j-1]; |
724 |
|
} |
728 |
|
} |
729 |
|
} |
730 |
|
wtot = 0; /* weight by proximity */ |
731 |
< |
for (i = NSUNPATCH; i--; ) |
731 |
> |
for (i = nsuns; i--; ) |
732 |
|
wtot += wta[i] = 1./(1.002 - near_dprod[i]); |
733 |
|
/* add to nearest patch radiances */ |
734 |
< |
for (i = NSUNPATCH; i--; ) { |
734 |
> |
for (i = nsuns; i--; ) { |
735 |
|
float *pdest = parr + 3*near_patch[i]; |
736 |
< |
float val_add = wta[i] * dir_illum / |
737 |
< |
(WHTEFFICACY * wtot * rh_dom[near_patch[i]]); |
736 |
> |
float val_add = wta[i] * dir_illum / (WHTEFFICACY * wtot); |
737 |
> |
|
738 |
> |
val_add /= (fixed_sun_sa > 0) ? fixed_sun_sa |
739 |
> |
: rh_dom[near_patch[i]] ; |
740 |
|
*pdest++ += val_add*suncolor[0]; |
741 |
|
*pdest++ += val_add*suncolor[1]; |
742 |
|
*pdest++ += val_add*suncolor[2]; |
880 |
|
double sz_cubed; /* Sun zenith angle cubed */ |
881 |
|
|
882 |
|
/* Calculate sun zenith angle cubed */ |
883 |
< |
sz_cubed = pow(sun_zenith, 3.0); |
883 |
> |
sz_cubed = sun_zenith*sun_zenith*sun_zenith; |
884 |
|
|
885 |
|
return ((diff_irrad + dir_irrad) / diff_irrad + 1.041 * |
886 |
|
sz_cubed) / (1.0 + 1.041 * sz_cubed); |
911 |
|
double CalcDirectIrradiance() |
912 |
|
{ |
913 |
|
return CalcDiffuseIrradiance() * ((sky_clearness - 1.0) * (1 + 1.041 |
914 |
< |
* pow(sun_zenith, 3.0))); |
914 |
> |
* sun_zenith*sun_zenith*sun_zenith)); |
915 |
|
} |
916 |
|
|
917 |
|
/* Calculate sky brightness and clearness from illuminance values */ |
937 |
|
sky_clearness = 12.0; |
938 |
|
|
939 |
|
/* Limit sky brightness */ |
940 |
< |
if (sky_brightness < 0.05) |
940 |
> |
if (sky_brightness < 0.01) |
941 |
|
sky_brightness = 0.01; |
942 |
|
|
943 |
|
while (((fabs(diff_irrad - test1) > 10.0) || |
950 |
|
/* Convert illuminance to irradiance */ |
951 |
|
index = GetCategoryIndex(); |
952 |
|
diff_irrad = diff_illum / CalcDiffuseIllumRatio(index); |
953 |
< |
dir_irrad = dir_illum / CalcDirectIllumRatio(index); |
953 |
> |
dir_irrad = CalcDirectIllumRatio(index); |
954 |
> |
if (dir_irrad > 0.1) |
955 |
> |
dir_irrad = dir_illum / dir_irrad; |
956 |
|
|
957 |
|
/* Calculate sky brightness and clearness */ |
958 |
|
sky_brightness = CalcSkyBrightness(); |
963 |
|
sky_clearness = 12.0; |
964 |
|
|
965 |
|
/* Limit sky brightness */ |
966 |
< |
if (sky_brightness < 0.05) |
966 |
> |
if (sky_brightness < 0.01) |
967 |
|
sky_brightness = 0.01; |
968 |
|
} |
969 |
|
|