| 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" |
| 90 |
– |
#include "resolu.h" |
| 91 |
– |
#include "platform.h" |
| 89 |
|
#include "color.h" |
| 90 |
< |
#include "resolu.h" |
| 90 |
> |
#include "sun.h" |
| 91 |
|
|
| 92 |
< |
char *progname; /* Program name */ |
| 96 |
< |
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 |
|
|
| 141 |
– |
|
| 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 |
< |
extern int jdate(int month, int day); |
| 259 |
< |
extern double stadj(int jd); |
| 260 |
< |
extern double sdec(int jd); |
| 261 |
< |
extern double salt(double sd, double st); |
| 262 |
< |
extern double sazi(double sd, double st); |
| 263 |
< |
/* sun calculation constants */ |
| 264 |
< |
extern double s_latitude; |
| 265 |
< |
extern double s_longitude; |
| 266 |
< |
extern double s_meridian; |
| 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? */ |
| 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 */ |
| 324 |
– |
int ntsteps = 0; /* number of time steps */ |
| 322 |
|
int avgSky = 0; /* compute average sky r.t. matrix? */ |
| 323 |
< |
int nrows = 0; /* number of rows in matrix */ |
| 324 |
< |
int rows_alloc = 0; /* number of allocated rows */ |
| 323 |
> |
int ntsteps = 0; /* number of time steps */ |
| 324 |
> |
int tstorage = 0; /* number of allocated time steps */ |
| 325 |
> |
int nstored = 0; /* number of time steps in matrix */ |
| 326 |
|
int last_monthly = 0; /* month of last report */ |
| 329 |
– |
int inconsistent = 0; /* inconsistent options set? */ |
| 327 |
|
int mo, da; /* month (1-12) and day (1-31) */ |
| 328 |
|
double hr; /* hour (local standard time) */ |
| 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 */ |
| 375 |
|
rhsubdiv = atoi(argv[++i]); |
| 376 |
|
break; |
| 377 |
|
case 'c': /* sky color */ |
| 380 |
– |
inconsistent |= (skycolor[1] <= 1e-4); |
| 378 |
|
skycolor[0] = atof(argv[++i]); |
| 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; |
| 398 |
+ |
/* fall through */ |
| 399 |
|
case 'd': /* solar (direct) only */ |
| 400 |
|
skycolor[0] = skycolor[1] = skycolor[2] = 0; |
| 401 |
< |
if (suncolor[1] <= 1e-4) { |
| 402 |
< |
inconsistent = 1; |
| 403 |
< |
suncolor[0] = suncolor[1] = suncolor[2] = 1; |
| 401 |
> |
grefl[0] = grefl[1] = grefl[2] = 0; |
| 402 |
> |
break; |
| 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 |
> |
progname, argv[i]); |
| 407 |
> |
exit(1); |
| 408 |
|
} |
| 409 |
|
break; |
| 410 |
|
case 's': /* sky only (no direct) */ |
| 411 |
|
suncolor[0] = suncolor[1] = suncolor[2] = 0; |
| 394 |
– |
if (skycolor[1] <= 1e-4) { |
| 395 |
– |
inconsistent = 1; |
| 396 |
– |
skycolor[0] = skycolor[1] = skycolor[2] = 1; |
| 397 |
– |
} |
| 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 |
|
} |
| 440 |
|
if (i < argc-1) |
| 441 |
|
goto userr; |
| 422 |
– |
if (inconsistent) |
| 423 |
– |
fprintf(stderr, "%s: WARNING: inconsistent -s, -d, -c options!\n", |
| 424 |
– |
progname); |
| 442 |
|
if (i == argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
| 443 |
|
fprintf(stderr, "%s: cannot open '%s' for input\n", |
| 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); |
| 504 |
|
s_longitude = DegToRad(s_longitude); |
| 505 |
|
s_meridian = DegToRad(s_meridian); |
| 506 |
|
/* initial allocation */ |
| 507 |
< |
mtx_data = resize_dmatrix(mtx_data, rows_alloc=2, nskypatch); |
| 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*nrows; |
| 535 |
< |
nrows += !avgSky | !nrows; |
| 534 |
> |
mtx_offset = 3*nskypatch*nstored; |
| 535 |
> |
nstored += !avgSky | !nstored; |
| 536 |
|
/* make space for next row */ |
| 537 |
< |
if (nrows > rows_alloc) { |
| 538 |
< |
rows_alloc += (rows_alloc>>1) + nrows + 7; |
| 539 |
< |
mtx_data = resize_dmatrix(mtx_data, rows_alloc, nskypatch); |
| 537 |
> |
if (nstored > tstorage) { |
| 538 |
> |
tstorage += (tstorage>>1) + nstored + 7; |
| 539 |
> |
mtx_data = resize_dmatrix(mtx_data, tstorage, nskypatch); |
| 540 |
|
} |
| 541 |
|
ntsteps++; /* keep count of time steps */ |
| 542 |
< |
if (dif <= 1e-4) { |
| 543 |
< |
if (!avgSky | !nrows) |
| 544 |
< |
memset(mtx_data+mtx_offset, 0, sizeof(float)*3*nskypatch); |
| 542 |
> |
|
| 543 |
> |
if (dir+dif <= 1e-4) { /* effectively nighttime? */ |
| 544 |
> |
if (!avgSky | !mtx_offset) |
| 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 |
< |
if (verbose && mo != last_monthly) |
| 554 |
< |
fprintf(stderr, "%s: stepping through month %d...\n", |
| 555 |
< |
progname, last_monthly=mo); |
| 556 |
< |
/* compute solar position */ |
| 505 |
< |
julian_date = jdate(mo, da); |
| 506 |
< |
sda = sdec(julian_date); |
| 507 |
< |
sta = stadj(julian_date); |
| 508 |
< |
altitude = salt(sda, hr+sta); |
| 509 |
< |
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 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 |
+ |
|
| 577 |
|
AddDirect(mtx_data+mtx_offset); |
| 578 |
|
/* update cumulative sky? */ |
| 579 |
|
for (i = 3*nskypatch*(avgSky&(ntsteps>1)); i--; ) |
| 580 |
|
mtx_data[i] += mtx_data[mtx_offset+i]; |
| 581 |
+ |
/* monthly reporting */ |
| 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); |
| 589 |
+ |
exit(1); |
| 590 |
+ |
} |
| 591 |
|
/* check for junk at end */ |
| 592 |
|
while ((i = fgetc(stdin)) != EOF) |
| 593 |
|
if (!isspace(i)) { |
| 598 |
|
fputs(buf, stderr); fputc('\n', stderr); |
| 599 |
|
break; |
| 600 |
|
} |
| 601 |
< |
if (!ntsteps) { |
| 602 |
< |
fprintf(stderr, "%s: no valid time steps on input\n", progname); |
| 603 |
< |
exit(1); |
| 604 |
< |
} |
| 601 |
> |
|
| 602 |
> |
if (avgSky < 0) /* no matrix output? */ |
| 603 |
> |
goto alldone; |
| 604 |
> |
|
| 605 |
|
dif = 1./(double)ntsteps; /* average sky? */ |
| 606 |
|
for (i = 3*nskypatch*(avgSky&(ntsteps>1)); i--; ) |
| 607 |
|
mtx_data[i] *= dif; |
| 613 |
|
#endif |
| 614 |
|
if (verbose) |
| 615 |
|
fprintf(stderr, "%s: writing %smatrix with %d time steps...\n", |
| 616 |
< |
progname, outfmt=='a' ? "" : "binary ", nrows); |
| 616 |
> |
progname, outfmt=='a' ? "" : "binary ", nstored); |
| 617 |
|
if (doheader) { |
| 618 |
|
newheader("RADIANCE", stdout); |
| 619 |
|
printargs(argc, argv, stdout); |
| 620 |
|
printf("LATLONG= %.8f %.8f\n", RadToDeg(s_latitude), |
| 621 |
|
-RadToDeg(s_longitude)); |
| 622 |
|
printf("NROWS=%d\n", nskypatch); |
| 623 |
< |
printf("NCOLS=%d\n", nrows); |
| 623 |
> |
printf("NCOLS=%d\n", nstored); |
| 624 |
|
printf("NCOMP=3\n"); |
| 625 |
+ |
if ((outfmt == 'f') | (outfmt == 'd')) |
| 626 |
+ |
fputendian(stdout); |
| 627 |
|
fputformat((char *)getfmtname(outfmt), stdout); |
| 628 |
|
putchar('\n'); |
| 629 |
|
} |
| 632 |
|
mtx_offset = 3*i; |
| 633 |
|
switch (outfmt) { |
| 634 |
|
case 'a': |
| 635 |
< |
for (j = 0; j < nrows; j++) { |
| 635 |
> |
for (j = 0; j < nstored; j++) { |
| 636 |
|
printf("%.3g %.3g %.3g\n", mtx_data[mtx_offset], |
| 637 |
|
mtx_data[mtx_offset+1], |
| 638 |
|
mtx_data[mtx_offset+2]); |
| 639 |
|
mtx_offset += 3*nskypatch; |
| 640 |
|
} |
| 641 |
< |
if (nrows > 1) |
| 641 |
> |
if (nstored > 1) |
| 642 |
|
fputc('\n', stdout); |
| 643 |
|
break; |
| 644 |
|
case 'f': |
| 645 |
< |
for (j = 0; j < nrows; j++) { |
| 645 |
> |
for (j = 0; j < nstored; j++) { |
| 646 |
|
putbinary(mtx_data+mtx_offset, sizeof(float), 3, |
| 647 |
|
stdout); |
| 648 |
|
mtx_offset += 3*nskypatch; |
| 649 |
|
} |
| 650 |
|
break; |
| 651 |
|
case 'd': |
| 652 |
< |
for (j = 0; j < nrows; j++) { |
| 652 |
> |
for (j = 0; j < nstored; j++) { |
| 653 |
|
double ment[3]; |
| 654 |
|
ment[0] = mtx_data[mtx_offset]; |
| 655 |
|
ment[1] = mtx_data[mtx_offset+1]; |
| 662 |
|
if (ferror(stdout)) |
| 663 |
|
goto writerr; |
| 664 |
|
} |
| 665 |
< |
if (fflush(stdout) == EOF) |
| 665 |
> |
alldone: |
| 666 |
> |
if (fflush(NULL) == EOF) |
| 667 |
|
goto writerr; |
| 668 |
|
if (verbose) |
| 669 |
|
fprintf(stderr, "%s: done.\n", progname); |
| 670 |
|
exit(0); |
| 671 |
|
userr: |
| 672 |
< |
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", |
| 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: |
| 676 |
< |
fprintf(stderr, "%s: input weather tape format error\n", progname); |
| 676 |
> |
fprintf(stderr, "%s: weather tape format error in header\n", progname); |
| 677 |
|
exit(1); |
| 678 |
|
writerr: |
| 679 |
|
fprintf(stderr, "%s: write error on output\n", progname); |
| 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(); |
| 750 |
|
diff_illum = diff_irrad * WHTEFFICACY; |
| 751 |
|
dir_illum = dir_irrad * WHTEFFICACY; |
| 752 |
|
} |
| 681 |
– |
|
| 682 |
– |
if (bright(skycolor) <= 1e-4) { /* 0 sky component? */ |
| 683 |
– |
memset(parr, 0, sizeof(float)*3*nskypatch); |
| 684 |
– |
return; |
| 685 |
– |
} |
| 753 |
|
/* Compute ground radiance (include solar contribution if any) */ |
| 754 |
|
parr[0] = diff_illum; |
| 755 |
|
if (altitude > 0) |
| 757 |
|
parr[2] = parr[1] = parr[0] *= (1./PI/WHTEFFICACY); |
| 758 |
|
multcolor(parr, grefl); |
| 759 |
|
|
| 760 |
+ |
if (bright(skycolor) <= 1e-4) { /* 0 sky component? */ |
| 761 |
+ |
memset(parr+3, 0, sizeof(float)*3*(nskypatch-1)); |
| 762 |
+ |
return; |
| 763 |
+ |
} |
| 764 |
|
/* Calculate Perez sky model parameters */ |
| 765 |
|
CalcPerezParam(sun_zenith, sky_clearness, sky_brightness, index); |
| 766 |
|
|
| 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(); |
