| 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> |
| 88 |
– |
#include "rtmath.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 */ |
| 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- */ |
| 250 |
|
#define NSUNPATCH 4 /* max. # patches to spread sun into */ |
| 251 |
|
#endif |
| 252 |
|
|
| 253 |
< |
extern int jdate(int month, int day); |
| 256 |
< |
extern double stadj(int jd); |
| 257 |
< |
extern double sdec(int jd); |
| 258 |
< |
extern double salt(double sd, double st); |
| 259 |
< |
extern double sazi(double sd, double st); |
| 260 |
< |
/* sun calculation constants */ |
| 261 |
< |
extern double s_latitude; |
| 262 |
< |
extern double s_longitude; |
| 263 |
< |
extern double s_meridian; |
| 253 |
> |
#define SUN_ANG_DEG 0.533 /* sun full-angle in degrees */ |
| 254 |
|
|
| 255 |
|
int nsuns = NSUNPATCH; /* number of sun patches to use */ |
| 256 |
|
double fixed_sun_sa = -1; /* fixed solid angle per sun? */ |
| 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, 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 ntsteps = 0; /* number of rows in matrix */ |
| 319 |
< |
int step_alloc = 0; |
| 318 |
> |
int avgSky = 0; /* compute average sky r.t. matrix? */ |
| 319 |
> |
int ntsteps = 0; /* number of time steps */ |
| 320 |
> |
int tstorage = 0; /* number of allocated time steps */ |
| 321 |
> |
int nstored = 0; /* number of time steps in matrix */ |
| 322 |
|
int last_monthly = 0; /* month of last report */ |
| 323 |
|
int mo, da; /* month (1-12) and day (1-31) */ |
| 324 |
|
double hr; /* hour (local standard time) */ |
| 374 |
|
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; |
| 393 |
+ |
/* fall through */ |
| 394 |
|
case 'd': /* solar (direct) only */ |
| 395 |
|
skycolor[0] = skycolor[1] = skycolor[2] = 0; |
| 396 |
< |
if (suncolor[1] <= 1e-4) |
| 381 |
< |
suncolor[0] = suncolor[1] = suncolor[2] = 1; |
| 396 |
> |
grefl[0] = grefl[1] = grefl[2] = 0; |
| 397 |
|
break; |
| 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); |
| 403 |
+ |
} |
| 404 |
+ |
break; |
| 405 |
|
case 's': /* sky only (no direct) */ |
| 406 |
|
suncolor[0] = suncolor[1] = suncolor[2] = 0; |
| 385 |
– |
if (skycolor[1] <= 1e-4) |
| 386 |
– |
skycolor[0] = skycolor[1] = skycolor[2] = 1; |
| 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; |
| 415 |
|
break; |
| 416 |
|
case '5': /* 5-phase calculation */ |
| 417 |
|
nsuns = 1; |
| 418 |
< |
fixed_sun_sa = 6.797e-05; |
| 418 |
> |
fixed_sun_sa = PI/360.*atof(argv[++i]); |
| 419 |
> |
if (fixed_sun_sa <= 0) { |
| 420 |
> |
fprintf(stderr, "%s: missing solar disk size argument for '-5' option\n", |
| 421 |
> |
progname); |
| 422 |
> |
exit(1); |
| 423 |
> |
} |
| 424 |
> |
fixed_sun_sa *= fixed_sun_sa*PI; |
| 425 |
|
break; |
| 426 |
+ |
case 'A': /* compute average sky */ |
| 427 |
+ |
avgSky = 1; |
| 428 |
+ |
break; |
| 429 |
|
default: |
| 430 |
|
goto userr; |
| 431 |
|
} |
| 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", |
| 481 |
|
fprintf(stderr, "%s: location '%s'\n", progname, buf); |
| 482 |
|
fprintf(stderr, "%s: (lat,long)=(%.1f,%.1f) degrees north, west\n", |
| 483 |
|
progname, s_latitude, s_longitude); |
| 484 |
< |
fprintf(stderr, "%s: %d sky patches per time step\n", |
| 485 |
< |
progname, nskypatch); |
| 484 |
> |
if (avgSky >= 0) |
| 485 |
> |
fprintf(stderr, "%s: %d sky patches\n", |
| 486 |
> |
progname, nskypatch); |
| 487 |
> |
if (sunsfp) |
| 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); |
| 495 |
|
s_latitude = DegToRad(s_latitude); |
| 496 |
|
s_longitude = DegToRad(s_longitude); |
| 497 |
|
s_meridian = DegToRad(s_meridian); |
| 498 |
+ |
/* initial allocation */ |
| 499 |
+ |
mtx_data = resize_dmatrix(mtx_data, tstorage=2, nskypatch); |
| 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 |
< |
/* make space for next time step */ |
| 463 |
< |
mtx_offset = 3*nskypatch*ntsteps++; |
| 464 |
< |
if (ntsteps > step_alloc) { |
| 465 |
< |
step_alloc += (step_alloc>>1) + ntsteps + 7; |
| 466 |
< |
mtx_data = resize_dmatrix(mtx_data, step_alloc, nskypatch); |
| 467 |
< |
} |
| 468 |
< |
if (dif <= 1e-4) { |
| 469 |
< |
memset(mtx_data+mtx_offset, 0, sizeof(float)*3*nskypatch); |
| 470 |
< |
continue; |
| 471 |
< |
} |
| 472 |
< |
if (verbose && mo != last_monthly) |
| 473 |
< |
fprintf(stderr, "%s: stepping through month %d...\n", |
| 474 |
< |
progname, last_monthly=mo); |
| 503 |
> |
int sun_in_sky; |
| 504 |
|
/* compute solar position */ |
| 505 |
< |
julian_date = jdate(mo, da); |
| 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; |
| 520 |
+ |
/* make space for next row */ |
| 521 |
+ |
if (nstored > tstorage) { |
| 522 |
+ |
tstorage += (tstorage>>1) + nstored + 7; |
| 523 |
+ |
mtx_data = resize_dmatrix(mtx_data, tstorage, nskypatch); |
| 524 |
+ |
} |
| 525 |
+ |
ntsteps++; /* keep count of time steps */ |
| 526 |
+ |
|
| 527 |
+ |
if (dir+dif <= 1e-4) { /* effectively nighttime? */ |
| 528 |
+ |
if (!avgSky | !mtx_offset) |
| 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 |
+ |
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 |
+ |
|
| 558 |
+ |
if (avgSky < 0) /* no matrix? */ |
| 559 |
+ |
continue; |
| 560 |
+ |
|
| 561 |
|
AddDirect(mtx_data+mtx_offset); |
| 562 |
+ |
/* update cumulative sky? */ |
| 563 |
+ |
for (i = 3*nskypatch*(avgSky&(ntsteps>1)); i--; ) |
| 564 |
+ |
mtx_data[i] += mtx_data[mtx_offset+i]; |
| 565 |
+ |
/* monthly reporting */ |
| 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); |
| 573 |
+ |
exit(1); |
| 574 |
+ |
} |
| 575 |
|
/* check for junk at end */ |
| 576 |
|
while ((i = fgetc(stdin)) != EOF) |
| 577 |
|
if (!isspace(i)) { |
| 582 |
|
fputs(buf, stderr); fputc('\n', stderr); |
| 583 |
|
break; |
| 584 |
|
} |
| 585 |
+ |
|
| 586 |
+ |
if (avgSky < 0) /* no matrix output? */ |
| 587 |
+ |
goto alldone; |
| 588 |
+ |
|
| 589 |
+ |
dif = 1./(double)ntsteps; /* average sky? */ |
| 590 |
+ |
for (i = 3*nskypatch*(avgSky&(ntsteps>1)); i--; ) |
| 591 |
+ |
mtx_data[i] *= dif; |
| 592 |
|
/* write out matrix */ |
| 593 |
|
if (outfmt != 'a') |
| 594 |
|
SET_FILE_BINARY(stdout); |
| 597 |
|
#endif |
| 598 |
|
if (verbose) |
| 599 |
|
fprintf(stderr, "%s: writing %smatrix with %d time steps...\n", |
| 600 |
< |
progname, outfmt=='a' ? "" : "binary ", ntsteps); |
| 600 |
> |
progname, outfmt=='a' ? "" : "binary ", nstored); |
| 601 |
|
if (doheader) { |
| 602 |
|
newheader("RADIANCE", stdout); |
| 603 |
|
printargs(argc, argv, stdout); |
| 604 |
|
printf("LATLONG= %.8f %.8f\n", RadToDeg(s_latitude), |
| 605 |
|
-RadToDeg(s_longitude)); |
| 606 |
|
printf("NROWS=%d\n", nskypatch); |
| 607 |
< |
printf("NCOLS=%d\n", ntsteps); |
| 607 |
> |
printf("NCOLS=%d\n", nstored); |
| 608 |
|
printf("NCOMP=3\n"); |
| 609 |
< |
fputformat(getfmtname(outfmt), stdout); |
| 609 |
> |
if ((outfmt == 'f') | (outfmt == 'd')) |
| 610 |
> |
fputendian(stdout); |
| 611 |
> |
fputformat((char *)getfmtname(outfmt), stdout); |
| 612 |
|
putchar('\n'); |
| 613 |
|
} |
| 614 |
|
/* patches are rows (outer sort) */ |
| 616 |
|
mtx_offset = 3*i; |
| 617 |
|
switch (outfmt) { |
| 618 |
|
case 'a': |
| 619 |
< |
for (j = 0; j < ntsteps; j++) { |
| 619 |
> |
for (j = 0; j < nstored; j++) { |
| 620 |
|
printf("%.3g %.3g %.3g\n", mtx_data[mtx_offset], |
| 621 |
|
mtx_data[mtx_offset+1], |
| 622 |
|
mtx_data[mtx_offset+2]); |
| 623 |
|
mtx_offset += 3*nskypatch; |
| 624 |
|
} |
| 625 |
< |
if (ntsteps > 1) |
| 625 |
> |
if (nstored > 1) |
| 626 |
|
fputc('\n', stdout); |
| 627 |
|
break; |
| 628 |
|
case 'f': |
| 629 |
< |
for (j = 0; j < ntsteps; j++) { |
| 630 |
< |
fwrite(mtx_data+mtx_offset, sizeof(float), 3, |
| 629 |
> |
for (j = 0; j < nstored; j++) { |
| 630 |
> |
putbinary(mtx_data+mtx_offset, sizeof(float), 3, |
| 631 |
|
stdout); |
| 632 |
|
mtx_offset += 3*nskypatch; |
| 633 |
|
} |
| 634 |
|
break; |
| 635 |
|
case 'd': |
| 636 |
< |
for (j = 0; j < ntsteps; j++) { |
| 636 |
> |
for (j = 0; j < nstored; j++) { |
| 637 |
|
double ment[3]; |
| 638 |
|
ment[0] = mtx_data[mtx_offset]; |
| 639 |
|
ment[1] = mtx_data[mtx_offset+1]; |
| 640 |
|
ment[2] = mtx_data[mtx_offset+2]; |
| 641 |
< |
fwrite(ment, sizeof(double), 3, stdout); |
| 641 |
> |
putbinary(ment, sizeof(double), 3, stdout); |
| 642 |
|
mtx_offset += 3*nskypatch; |
| 643 |
|
} |
| 644 |
|
break; |
| 646 |
|
if (ferror(stdout)) |
| 647 |
|
goto writerr; |
| 648 |
|
} |
| 649 |
< |
if (fflush(stdout) == EOF) |
| 649 |
> |
alldone: |
| 650 |
> |
if (fflush(NULL) == EOF) |
| 651 |
|
goto writerr; |
| 652 |
|
if (verbose) |
| 653 |
|
fprintf(stderr, "%s: done.\n", progname); |
| 654 |
|
exit(0); |
| 655 |
|
userr: |
| 656 |
< |
fprintf(stderr, "Usage: %s [-v][-h][-d|-s][-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: |
| 660 |
< |
fprintf(stderr, "%s: input weather tape format error\n", progname); |
| 660 |
> |
fprintf(stderr, "%s: weather tape format error in header\n", progname); |
| 661 |
|
exit(1); |
| 662 |
|
writerr: |
| 663 |
|
fprintf(stderr, "%s: write error on output\n", progname); |
| 729 |
|
diff_illum = diff_irrad * WHTEFFICACY; |
| 730 |
|
dir_illum = dir_irrad * WHTEFFICACY; |
| 731 |
|
} |
| 642 |
– |
|
| 643 |
– |
if (bright(skycolor) <= 1e-4) { /* 0 sky component? */ |
| 644 |
– |
memset(parr, 0, sizeof(float)*3*nskypatch); |
| 645 |
– |
return; |
| 646 |
– |
} |
| 732 |
|
/* Compute ground radiance (include solar contribution if any) */ |
| 733 |
|
parr[0] = diff_illum; |
| 734 |
|
if (altitude > 0) |
| 736 |
|
parr[2] = parr[1] = parr[0] *= (1./PI/WHTEFFICACY); |
| 737 |
|
multcolor(parr, grefl); |
| 738 |
|
|
| 739 |
+ |
if (bright(skycolor) <= 1e-4) { /* 0 sky component? */ |
| 740 |
+ |
memset(parr+3, 0, sizeof(float)*3*(nskypatch-1)); |
| 741 |
+ |
return; |
| 742 |
+ |
} |
| 743 |
|
/* Calculate Perez sky model parameters */ |
| 744 |
|
CalcPerezParam(sun_zenith, sky_clearness, sky_brightness, index); |
| 745 |
|
|
| 817 |
|
} |
| 818 |
|
} |
| 819 |
|
|
| 820 |
+ |
/* Output a sun to indicated file if appropriate for this time step */ |
| 821 |
+ |
void |
| 822 |
+ |
OutputSun(int id, int goodsun, FILE *fp, FILE *mfp) |
| 823 |
+ |
{ |
| 824 |
+ |
double srad; |
| 825 |
+ |
FVECT sv; |
| 826 |
+ |
|
| 827 |
+ |
srad = DegToRad(SUN_ANG_DEG/2.); |
| 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) */ |
| 841 |
|
int |
| 842 |
|
rh_init(void) |
| 1044 |
|
/* Convert illuminance to irradiance */ |
| 1045 |
|
index = GetCategoryIndex(); |
| 1046 |
|
diff_irrad = diff_illum / CalcDiffuseIllumRatio(index); |
| 1047 |
< |
dir_irrad = dir_illum / CalcDirectIllumRatio(index); |
| 1047 |
> |
dir_irrad = CalcDirectIllumRatio(index); |
| 1048 |
> |
if (dir_irrad > 0.1) |
| 1049 |
> |
dir_irrad = dir_illum / dir_irrad; |
| 1050 |
|
|
| 1051 |
|
/* Calculate sky brightness and clearness */ |
| 1052 |
|
sky_brightness = CalcSkyBrightness(); |
