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 |
+ |
FILE *sunsfp = NULL; /* output file for individual suns */ |
311 |
|
float *mtx_data = NULL; /* our matrix data */ |
312 |
< |
int ntsteps = 0; /* number of rows in matrix */ |
312 |
> |
int avgSky = 0; /* compute average sky r.t. matrix? */ |
313 |
> |
int ntsteps = 0; /* number of time steps */ |
314 |
> |
int tstorage = 0; /* number of allocated time steps */ |
315 |
> |
int nstored = 0; /* number of time steps in matrix */ |
316 |
|
int last_monthly = 0; /* month of last report */ |
317 |
|
int mo, da; /* month (1-12) and day (1-31) */ |
318 |
|
double hr; /* hour (local standard time) */ |
332 |
|
case 'v': /* verbose progress reports */ |
333 |
|
verbose++; |
334 |
|
break; |
335 |
+ |
case 'h': /* turn off header */ |
336 |
+ |
doheader = 0; |
337 |
+ |
break; |
338 |
|
case 'o': /* output format */ |
339 |
|
switch (argv[i][2]) { |
340 |
|
case 'f': |
346 |
|
goto userr; |
347 |
|
} |
348 |
|
break; |
349 |
+ |
case 'O': /* output type */ |
350 |
+ |
switch (argv[i][2]) { |
351 |
+ |
case '0': |
352 |
+ |
output = 0; |
353 |
+ |
break; |
354 |
+ |
case '1': |
355 |
+ |
output = 1; |
356 |
+ |
break; |
357 |
+ |
default: |
358 |
+ |
goto userr; |
359 |
+ |
} |
360 |
+ |
if (argv[i][3]) |
361 |
+ |
goto userr; |
362 |
+ |
break; |
363 |
|
case 'm': /* Reinhart subdivisions */ |
364 |
|
rhsubdiv = atoi(argv[++i]); |
365 |
|
break; |
368 |
|
skycolor[1] = atof(argv[++i]); |
369 |
|
skycolor[2] = atof(argv[++i]); |
370 |
|
break; |
371 |
+ |
case 'n': /* no matrix output */ |
372 |
+ |
avgSky = -1; |
373 |
+ |
rhsubdiv = 1; |
374 |
+ |
/* fall through */ |
375 |
|
case 'd': /* solar (direct) only */ |
376 |
|
skycolor[0] = skycolor[1] = skycolor[2] = 0; |
377 |
< |
if (suncolor[1] <= 1e-4) |
340 |
< |
suncolor[0] = suncolor[1] = suncolor[2] = 1; |
377 |
> |
grefl[0] = grefl[1] = grefl[2] = 0; |
378 |
|
break; |
379 |
+ |
case 'D': /* output suns to file */ |
380 |
+ |
sunsfp = fopen(argv[++i], "w"); |
381 |
+ |
if (!sunsfp) { |
382 |
+ |
fprintf(stderr, "%s: cannot open '%s' for output\n", |
383 |
+ |
argv[0], argv[i]); |
384 |
+ |
exit(1); |
385 |
+ |
} |
386 |
+ |
fixed_sun_sa = PI/360.*0.533; |
387 |
+ |
fixed_sun_sa *= PI*fixed_sun_sa; |
388 |
+ |
break; |
389 |
|
case 's': /* sky only (no direct) */ |
390 |
|
suncolor[0] = suncolor[1] = suncolor[2] = 0; |
344 |
– |
if (skycolor[1] <= 1e-4) |
345 |
– |
skycolor[0] = skycolor[1] = skycolor[2] = 1; |
391 |
|
break; |
392 |
+ |
case 'r': /* rotate distribution */ |
393 |
+ |
if (argv[i][2] && argv[i][2] != 'z') |
394 |
+ |
goto userr; |
395 |
+ |
rotation = atof(argv[++i]); |
396 |
+ |
break; |
397 |
+ |
case '5': /* 5-phase calculation */ |
398 |
+ |
nsuns = 1; |
399 |
+ |
fixed_sun_sa = PI/360.*atof(argv[++i]); |
400 |
+ |
if (fixed_sun_sa <= 0) { |
401 |
+ |
fprintf(stderr, "%s: missing solar disk size argument for '-5' option\n", |
402 |
+ |
argv[0]); |
403 |
+ |
exit(1); |
404 |
+ |
} |
405 |
+ |
fixed_sun_sa *= fixed_sun_sa*PI; |
406 |
+ |
break; |
407 |
+ |
case 'A': /* compute average sky */ |
408 |
+ |
avgSky = 1; |
409 |
+ |
break; |
410 |
|
default: |
411 |
|
goto userr; |
412 |
|
} |
461 |
|
progname, s_latitude, s_longitude); |
462 |
|
fprintf(stderr, "%s: %d sky patches per time step\n", |
463 |
|
progname, nskypatch); |
464 |
+ |
if (rotation != 0) |
465 |
+ |
fprintf(stderr, "%s: rotating output %.0f degrees\n", |
466 |
+ |
progname, rotation); |
467 |
|
} |
468 |
|
/* convert quantities to radians */ |
469 |
|
s_latitude = DegToRad(s_latitude); |
470 |
|
s_longitude = DegToRad(s_longitude); |
471 |
|
s_meridian = DegToRad(s_meridian); |
472 |
+ |
/* initial allocation */ |
473 |
+ |
mtx_data = resize_dmatrix(mtx_data, tstorage=2, nskypatch); |
474 |
|
/* process each time step in tape */ |
475 |
|
while (scanf("%d %d %lf %lf %lf\n", &mo, &da, &hr, &dir, &dif) == 5) { |
476 |
|
double sda, sta; |
477 |
< |
/* make space for next time step */ |
478 |
< |
mtx_offset = 3*nskypatch*ntsteps++; |
479 |
< |
mtx_data = resize_dmatrix(mtx_data, ntsteps, nskypatch); |
477 |
> |
|
478 |
> |
mtx_offset = 3*nskypatch*nstored; |
479 |
> |
nstored += !avgSky | !nstored; |
480 |
> |
/* make space for next row */ |
481 |
> |
if (nstored > tstorage) { |
482 |
> |
tstorage += (tstorage>>1) + nstored + 7; |
483 |
> |
mtx_data = resize_dmatrix(mtx_data, tstorage, nskypatch); |
484 |
> |
} |
485 |
> |
ntsteps++; /* keep count of time steps */ |
486 |
|
if (dif <= 1e-4) { |
487 |
< |
memset(mtx_data+mtx_offset, 0, sizeof(float)*3*nskypatch); |
487 |
> |
if (!avgSky | !mtx_offset) |
488 |
> |
memset(mtx_data+mtx_offset, 0, sizeof(float)*3*nskypatch); |
489 |
|
continue; |
490 |
|
} |
416 |
– |
if (verbose && mo != last_monthly) |
417 |
– |
fprintf(stderr, "%s: stepping through month %d...\n", |
418 |
– |
progname, last_monthly=mo); |
491 |
|
/* compute solar position */ |
492 |
|
julian_date = jdate(mo, da); |
493 |
|
sda = sdec(julian_date); |
494 |
|
sta = stadj(julian_date); |
495 |
|
altitude = salt(sda, hr+sta); |
496 |
< |
azimuth = sazi(sda, hr+sta) + PI; |
496 |
> |
azimuth = sazi(sda, hr+sta) + PI - DegToRad(rotation); |
497 |
|
/* convert measured values */ |
498 |
|
if (dir_is_horiz && altitude > 0.) |
499 |
|
dir /= sin(altitude); |
506 |
|
} |
507 |
|
/* compute sky patch values */ |
508 |
|
ComputeSky(mtx_data+mtx_offset); |
509 |
+ |
/* output sun if indicated */ |
510 |
+ |
if (sunsfp && (altitude > 0) & (dir_illum > 1e-4)) { |
511 |
+ |
double srad = dir_illum/(WHTEFFICACY * fixed_sun_sa); |
512 |
+ |
FVECT sv; |
513 |
+ |
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 |
+ |
} |
520 |
+ |
if (avgSky < 0) /* no matrix? */ |
521 |
+ |
continue; |
522 |
+ |
|
523 |
|
AddDirect(mtx_data+mtx_offset); |
524 |
+ |
/* update cumulative sky? */ |
525 |
+ |
for (i = 3*nskypatch*(avgSky&(ntsteps>1)); i--; ) |
526 |
+ |
mtx_data[i] += mtx_data[mtx_offset+i]; |
527 |
+ |
/* monthly reporting */ |
528 |
+ |
if (verbose && mo != last_monthly) |
529 |
+ |
fprintf(stderr, "%s: stepping through month %d...\n", |
530 |
+ |
progname, last_monthly=mo); |
531 |
|
} |
532 |
+ |
if (!ntsteps) { |
533 |
+ |
fprintf(stderr, "%s: no valid time steps on input\n", progname); |
534 |
+ |
exit(1); |
535 |
+ |
} |
536 |
|
/* check for junk at end */ |
537 |
|
while ((i = fgetc(stdin)) != EOF) |
538 |
|
if (!isspace(i)) { |
543 |
|
fputs(buf, stderr); fputc('\n', stderr); |
544 |
|
break; |
545 |
|
} |
546 |
+ |
|
547 |
+ |
if (avgSky < 0) /* no matrix output? */ |
548 |
+ |
goto alldone; |
549 |
+ |
|
550 |
+ |
dif = 1./(double)ntsteps; /* average sky? */ |
551 |
+ |
for (i = 3*nskypatch*(avgSky&(ntsteps>1)); i--; ) |
552 |
+ |
mtx_data[i] *= dif; |
553 |
|
/* write out matrix */ |
554 |
+ |
if (outfmt != 'a') |
555 |
+ |
SET_FILE_BINARY(stdout); |
556 |
|
#ifdef getc_unlocked |
557 |
|
flockfile(stdout); |
558 |
|
#endif |
559 |
|
if (verbose) |
560 |
|
fprintf(stderr, "%s: writing %smatrix with %d time steps...\n", |
561 |
< |
progname, outfmt=='a' ? "" : "binary ", ntsteps); |
561 |
> |
progname, outfmt=='a' ? "" : "binary ", nstored); |
562 |
> |
if (doheader) { |
563 |
> |
newheader("RADIANCE", stdout); |
564 |
> |
printargs(argc, argv, stdout); |
565 |
> |
printf("LATLONG= %.8f %.8f\n", RadToDeg(s_latitude), |
566 |
> |
-RadToDeg(s_longitude)); |
567 |
> |
printf("NROWS=%d\n", nskypatch); |
568 |
> |
printf("NCOLS=%d\n", nstored); |
569 |
> |
printf("NCOMP=3\n"); |
570 |
> |
if ((outfmt == 'f') | (outfmt == 'd')) |
571 |
> |
fputendian(stdout); |
572 |
> |
fputformat((char *)getfmtname(outfmt), stdout); |
573 |
> |
putchar('\n'); |
574 |
> |
} |
575 |
|
/* patches are rows (outer sort) */ |
576 |
|
for (i = 0; i < nskypatch; i++) { |
577 |
|
mtx_offset = 3*i; |
578 |
|
switch (outfmt) { |
579 |
|
case 'a': |
580 |
< |
for (j = 0; j < ntsteps; j++) { |
580 |
> |
for (j = 0; j < nstored; j++) { |
581 |
|
printf("%.3g %.3g %.3g\n", mtx_data[mtx_offset], |
582 |
|
mtx_data[mtx_offset+1], |
583 |
|
mtx_data[mtx_offset+2]); |
584 |
|
mtx_offset += 3*nskypatch; |
585 |
|
} |
586 |
< |
if (ntsteps > 1) |
586 |
> |
if (nstored > 1) |
587 |
|
fputc('\n', stdout); |
588 |
|
break; |
589 |
|
case 'f': |
590 |
< |
for (j = 0; j < ntsteps; j++) { |
591 |
< |
fwrite(mtx_data+mtx_offset, sizeof(float), 3, |
590 |
> |
for (j = 0; j < nstored; j++) { |
591 |
> |
putbinary(mtx_data+mtx_offset, sizeof(float), 3, |
592 |
|
stdout); |
593 |
|
mtx_offset += 3*nskypatch; |
594 |
|
} |
595 |
|
break; |
596 |
|
case 'd': |
597 |
< |
for (j = 0; j < ntsteps; j++) { |
597 |
> |
for (j = 0; j < nstored; j++) { |
598 |
|
double ment[3]; |
599 |
|
ment[0] = mtx_data[mtx_offset]; |
600 |
|
ment[1] = mtx_data[mtx_offset+1]; |
601 |
|
ment[2] = mtx_data[mtx_offset+2]; |
602 |
< |
fwrite(ment, sizeof(double), 3, stdout); |
602 |
> |
putbinary(ment, sizeof(double), 3, stdout); |
603 |
|
mtx_offset += 3*nskypatch; |
604 |
|
} |
605 |
|
break; |
607 |
|
if (ferror(stdout)) |
608 |
|
goto writerr; |
609 |
|
} |
610 |
< |
if (fflush(stdout) == EOF) |
610 |
> |
alldone: |
611 |
> |
if (fflush(NULL) == EOF) |
612 |
|
goto writerr; |
613 |
|
if (verbose) |
614 |
|
fprintf(stderr, "%s: done.\n", progname); |
615 |
|
exit(0); |
616 |
|
userr: |
617 |
< |
fprintf(stderr, "Usage: %s [-v][-d|-s][-m N][-g refl][-c r g b][-o{f|d}] [tape.wea]\n", |
617 |
> |
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", |
618 |
|
progname); |
619 |
|
exit(1); |
620 |
|
fmterr: |
621 |
< |
fprintf(stderr, "%s: input weather tape format error\n", progname); |
621 |
> |
fprintf(stderr, "%s: weather tape format error in header\n", progname); |
622 |
|
exit(1); |
623 |
|
writerr: |
624 |
|
fprintf(stderr, "%s: write error on output\n", progname); |
635 |
|
{ |
636 |
|
int index; /* Category index */ |
637 |
|
double norm_diff_illum; /* Normalized diffuse illuimnance */ |
518 |
– |
double zlumin; /* Zenith luminance */ |
638 |
|
int i; |
639 |
|
|
640 |
|
/* Calculate atmospheric precipitable water content */ |
641 |
|
apwc = CalcPrecipWater(dew_point); |
642 |
|
|
643 |
< |
/* Limit solar altitude to keep circumsolar off zenith */ |
644 |
< |
if (altitude > DegToRad(87.0)) |
645 |
< |
altitude = DegToRad(87.0); |
643 |
> |
/* Calculate sun zenith angle (don't let it dip below horizon) */ |
644 |
> |
/* Also limit minimum angle to keep circumsolar off zenith */ |
645 |
> |
if (altitude <= 0.0) |
646 |
> |
sun_zenith = DegToRad(90.0); |
647 |
> |
else if (altitude >= DegToRad(87.0)) |
648 |
> |
sun_zenith = DegToRad(3.0); |
649 |
> |
else |
650 |
> |
sun_zenith = DegToRad(90.0) - altitude; |
651 |
|
|
528 |
– |
/* Calculate sun zenith angle */ |
529 |
– |
sun_zenith = DegToRad(90.0) - altitude; |
530 |
– |
|
652 |
|
/* Compute the inputs for the calculation of the sky distribution */ |
653 |
|
|
654 |
|
if (input == 0) /* XXX never used */ |
667 |
|
sky_brightness = CalcSkyBrightness(); |
668 |
|
sky_clearness = CalcSkyClearness(); |
669 |
|
|
670 |
+ |
/* Limit sky clearness */ |
671 |
+ |
if (sky_clearness > 11.9) |
672 |
+ |
sky_clearness = 11.9; |
673 |
+ |
|
674 |
+ |
/* Limit sky brightness */ |
675 |
+ |
if (sky_brightness < 0.01) |
676 |
+ |
sky_brightness = 0.01; |
677 |
+ |
|
678 |
|
/* Calculate illuminance */ |
679 |
|
index = GetCategoryIndex(); |
680 |
|
diff_illum = diff_irrad * CalcDiffuseIllumRatio(index); |
686 |
|
index = CalcSkyParamFromIllum(); |
687 |
|
} |
688 |
|
|
689 |
< |
if (bright(skycolor) <= 1e-4) { /* 0 sky component? */ |
690 |
< |
memset(parr, 0, sizeof(float)*3*nskypatch); |
691 |
< |
return; |
689 |
> |
if (output == 1) { /* hack for solar radiance */ |
690 |
> |
diff_illum = diff_irrad * WHTEFFICACY; |
691 |
> |
dir_illum = dir_irrad * WHTEFFICACY; |
692 |
|
} |
693 |
|
/* Compute ground radiance (include solar contribution if any) */ |
694 |
|
parr[0] = diff_illum; |
697 |
|
parr[2] = parr[1] = parr[0] *= (1./PI/WHTEFFICACY); |
698 |
|
multcolor(parr, grefl); |
699 |
|
|
700 |
+ |
if (bright(skycolor) <= 1e-4) { /* 0 sky component? */ |
701 |
+ |
memset(parr+3, 0, sizeof(float)*3*(nskypatch-1)); |
702 |
+ |
return; |
703 |
+ |
} |
704 |
|
/* Calculate Perez sky model parameters */ |
705 |
|
CalcPerezParam(sun_zenith, sky_clearness, sky_brightness, index); |
706 |
|
|
710 |
|
/* Calculate relative horizontal illuminance */ |
711 |
|
norm_diff_illum = CalcRelHorzIllum(parr); |
712 |
|
|
713 |
+ |
/* Check for zero sky -- make uniform in that case */ |
714 |
+ |
if (norm_diff_illum <= FTINY) { |
715 |
+ |
for (i = 1; i < nskypatch; i++) |
716 |
+ |
setcolor(parr+3*i, 1., 1., 1.); |
717 |
+ |
norm_diff_illum = PI; |
718 |
+ |
} |
719 |
|
/* Normalization coefficient */ |
720 |
|
norm_diff_illum = diff_illum / norm_diff_illum; |
721 |
|
|
583 |
– |
/* Calculate relative zenith luminance */ |
584 |
– |
zlumin = CalcRelLuminance(sun_zenith, 0.0); |
585 |
– |
|
586 |
– |
/* Calculate absolute zenith illuminance */ |
587 |
– |
zlumin *= norm_diff_illum; |
588 |
– |
|
722 |
|
/* Apply to sky patches to get absolute radiance values */ |
723 |
|
for (i = 1; i < nskypatch; i++) { |
724 |
< |
scalecolor(parr+3*i, zlumin*(1./WHTEFFICACY)); |
724 |
> |
scalecolor(parr+3*i, norm_diff_illum*(1./WHTEFFICACY)); |
725 |
|
multcolor(parr+3*i, skycolor); |
726 |
|
} |
727 |
|
} |
738 |
|
|
739 |
|
if (dir_illum <= 1e-4 || bright(suncolor) <= 1e-4) |
740 |
|
return; |
741 |
< |
/* identify NSUNPATCH closest patches */ |
742 |
< |
for (i = NSUNPATCH; i--; ) |
741 |
> |
/* identify nsuns closest patches */ |
742 |
> |
if (nsuns > NSUNPATCH) |
743 |
> |
nsuns = NSUNPATCH; |
744 |
> |
else if (nsuns <= 0) |
745 |
> |
nsuns = 1; |
746 |
> |
for (i = nsuns; i--; ) |
747 |
|
near_dprod[i] = -1.; |
748 |
|
vector(svec, altitude, azimuth); |
749 |
|
for (p = 1; p < nskypatch; p++) { |
751 |
|
double dprod; |
752 |
|
rh_vector(pvec, p); |
753 |
|
dprod = DOT(pvec, svec); |
754 |
< |
for (i = 0; i < NSUNPATCH; i++) |
754 |
> |
for (i = 0; i < nsuns; i++) |
755 |
|
if (dprod > near_dprod[i]) { |
756 |
< |
for (j = NSUNPATCH; --j > i; ) { |
756 |
> |
for (j = nsuns; --j > i; ) { |
757 |
|
near_dprod[j] = near_dprod[j-1]; |
758 |
|
near_patch[j] = near_patch[j-1]; |
759 |
|
} |
763 |
|
} |
764 |
|
} |
765 |
|
wtot = 0; /* weight by proximity */ |
766 |
< |
for (i = NSUNPATCH; i--; ) |
766 |
> |
for (i = nsuns; i--; ) |
767 |
|
wtot += wta[i] = 1./(1.002 - near_dprod[i]); |
768 |
|
/* add to nearest patch radiances */ |
769 |
< |
for (i = NSUNPATCH; i--; ) { |
769 |
> |
for (i = nsuns; i--; ) { |
770 |
|
float *pdest = parr + 3*near_patch[i]; |
771 |
< |
float val_add = wta[i] * dir_illum / |
772 |
< |
(WHTEFFICACY * wtot * rh_dom[near_patch[i]]); |
771 |
> |
float val_add = wta[i] * dir_illum / (WHTEFFICACY * wtot); |
772 |
> |
|
773 |
> |
val_add /= (fixed_sun_sa > 0) ? fixed_sun_sa |
774 |
> |
: rh_dom[near_patch[i]] ; |
775 |
|
*pdest++ += val_add*suncolor[0]; |
776 |
|
*pdest++ += val_add*suncolor[1]; |
777 |
|
*pdest++ += val_add*suncolor[2]; |
915 |
|
double sz_cubed; /* Sun zenith angle cubed */ |
916 |
|
|
917 |
|
/* Calculate sun zenith angle cubed */ |
918 |
< |
sz_cubed = pow(sun_zenith, 3.0); |
918 |
> |
sz_cubed = sun_zenith*sun_zenith*sun_zenith; |
919 |
|
|
920 |
|
return ((diff_irrad + dir_irrad) / diff_irrad + 1.041 * |
921 |
|
sz_cubed) / (1.0 + 1.041 * sz_cubed); |
946 |
|
double CalcDirectIrradiance() |
947 |
|
{ |
948 |
|
return CalcDiffuseIrradiance() * ((sky_clearness - 1.0) * (1 + 1.041 |
949 |
< |
* pow(sun_zenith, 3.0))); |
949 |
> |
* sun_zenith*sun_zenith*sun_zenith)); |
950 |
|
} |
951 |
|
|
952 |
|
/* Calculate sky brightness and clearness from illuminance values */ |
972 |
|
sky_clearness = 12.0; |
973 |
|
|
974 |
|
/* Limit sky brightness */ |
975 |
< |
if (sky_brightness < 0.05) |
975 |
> |
if (sky_brightness < 0.01) |
976 |
|
sky_brightness = 0.01; |
977 |
|
|
978 |
|
while (((fabs(diff_irrad - test1) > 10.0) || |
985 |
|
/* Convert illuminance to irradiance */ |
986 |
|
index = GetCategoryIndex(); |
987 |
|
diff_irrad = diff_illum / CalcDiffuseIllumRatio(index); |
988 |
< |
dir_irrad = dir_illum / CalcDirectIllumRatio(index); |
988 |
> |
dir_irrad = CalcDirectIllumRatio(index); |
989 |
> |
if (dir_irrad > 0.1) |
990 |
> |
dir_irrad = dir_illum / dir_irrad; |
991 |
|
|
992 |
|
/* Calculate sky brightness and clearness */ |
993 |
|
sky_brightness = CalcSkyBrightness(); |
998 |
|
sky_clearness = 12.0; |
999 |
|
|
1000 |
|
/* Limit sky brightness */ |
1001 |
< |
if (sky_brightness < 0.05) |
1001 |
> |
if (sky_brightness < 0.01) |
1002 |
|
sky_brightness = 0.01; |
1003 |
|
} |
1004 |
|
|
1084 |
|
double rh_illum = 0.0; /* Relative horizontal illuminance */ |
1085 |
|
|
1086 |
|
for (i = 1; i < nskypatch; i++) |
1087 |
< |
rh_illum += parr[3*i+1] * rh_cos(i); |
1087 |
> |
rh_illum += parr[3*i+1] * rh_cos(i) * rh_dom[i]; |
1088 |
|
|
1089 |
< |
return rh_illum * (2.0 * PI / (nskypatch-1)); |
1089 |
> |
return rh_illum; |
1090 |
|
} |
1091 |
|
|
1092 |
|
/* Calculate earth orbit eccentricity correction factor */ |