| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: eplus_adduvf.c,v 2.12 2014/02/21 13:17:45 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Add User View Factors to EnergyPlus Input Data File |
| 6 |
* |
| 7 |
* G.Ward for LBNL |
| 8 |
*/ |
| 9 |
|
| 10 |
#include <stdlib.h> |
| 11 |
#include "rtio.h" |
| 12 |
#include "rtmath.h" |
| 13 |
#include "random.h" |
| 14 |
#include "eplus_idf.h" |
| 15 |
#include "triangulate.h" |
| 16 |
#include "rtprocess.h" |
| 17 |
|
| 18 |
#ifndef NSAMPLES |
| 19 |
#define NSAMPLES 80000 /* default number of samples */ |
| 20 |
#endif |
| 21 |
|
| 22 |
#define SURF_EPS 0.0005 /* surface testing epsilon */ |
| 23 |
|
| 24 |
char *progname; /* global argv[0] */ |
| 25 |
|
| 26 |
int nsamps = NSAMPLES; /* number of samples to use */ |
| 27 |
|
| 28 |
char temp_octree[128]; /* temporary octree */ |
| 29 |
|
| 30 |
const char UVF_PNAME[] = |
| 31 |
"ZoneProperty:UserViewFactors:bySurfaceName"; |
| 32 |
|
| 33 |
const char SUBSURF_PNAME[] = |
| 34 |
"FenestrationSurface:Detailed"; |
| 35 |
|
| 36 |
const char ADD_HEADER[] = |
| 37 |
"\n!+++ User View Factors computed by Radiance +++!\n\n"; |
| 38 |
|
| 39 |
#define NAME_FLD 1 /* name field always first? */ |
| 40 |
|
| 41 |
#define SS_BASE_FLD 4 /* subsurface base surface */ |
| 42 |
#define SS_VERT_FLD 10 /* subsurface vertex count */ |
| 43 |
|
| 44 |
typedef struct { |
| 45 |
const char *pname; /* object type name */ |
| 46 |
short zone_fld; /* zone field index */ |
| 47 |
short vert_fld; /* vertex field index */ |
| 48 |
} SURF_PTYPE; /* surface type we're interested in */ |
| 49 |
|
| 50 |
const SURF_PTYPE surf_type[] = { |
| 51 |
{"BuildingSurface:Detailed", 4, 10}, |
| 52 |
{"Floor:Detailed", 3, 9}, |
| 53 |
{"RoofCeiling:Detailed", 3, 9}, |
| 54 |
{"Wall:Detailed", 3, 9}, |
| 55 |
{NULL} |
| 56 |
}; /* IDF surface types */ |
| 57 |
|
| 58 |
typedef struct s_zone { |
| 59 |
const char *zname; /* zone name */ |
| 60 |
struct s_zone *next; /* next zone in list */ |
| 61 |
int nsurf; /* surface count */ |
| 62 |
int ntotal; /* surfaces+subsurfaces */ |
| 63 |
IDF_OBJECT *pfirst; /* first matching object */ |
| 64 |
IDF_OBJECT *plast; /* last before subsurfaces */ |
| 65 |
float *area_redu; /* subsurface area per surf. */ |
| 66 |
} ZONE; /* a list of collected zone surfaces */ |
| 67 |
|
| 68 |
ZONE *zone_list = NULL; /* our list of zones */ |
| 69 |
|
| 70 |
LUTAB zonesurf_lut = /* zone surface lookup table */ |
| 71 |
LU_SINIT(NULL,NULL); |
| 72 |
|
| 73 |
IDF_LOADED *our_idf = NULL; /* loaded/modified IDF */ |
| 74 |
|
| 75 |
typedef struct { |
| 76 |
FVECT norm; /* surface normal */ |
| 77 |
double area; /* surface area */ |
| 78 |
int nv; /* number of vertices */ |
| 79 |
FVECT vl[3]; /* vertex list (extends struct) */ |
| 80 |
} SURFACE; /* a polygonal surface */ |
| 81 |
|
| 82 |
typedef struct { |
| 83 |
FVECT sdir[3]; /* UVW unit sampling vectors */ |
| 84 |
double poff; /* W-offset for plane of polygon */ |
| 85 |
double area_left; /* area left to sample */ |
| 86 |
int samp_left; /* remaining samples */ |
| 87 |
int wd; /* output file descriptor */ |
| 88 |
} POLYSAMP; /* structure for polygon sampling */ |
| 89 |
|
| 90 |
/* Create a new zone and push to top of our list */ |
| 91 |
static ZONE * |
| 92 |
new_zone(const char *zname, IDF_OBJECT *param) |
| 93 |
{ |
| 94 |
ZONE *znew = (ZONE *)malloc(sizeof(ZONE)); |
| 95 |
|
| 96 |
if (znew == NULL) |
| 97 |
return(NULL); |
| 98 |
znew->zname = zname; /* assumes static */ |
| 99 |
znew->next = zone_list; |
| 100 |
znew->pfirst = znew->plast = param; |
| 101 |
znew->ntotal = znew->nsurf = 1; |
| 102 |
znew->area_redu = NULL; |
| 103 |
return(zone_list = znew); |
| 104 |
} |
| 105 |
|
| 106 |
/* Add the detailed surface (polygon) to the named zone */ |
| 107 |
static ZONE * |
| 108 |
add2zone(IDF_OBJECT *param, const char *zname) |
| 109 |
{ |
| 110 |
IDF_FIELD *nfp = idf_getfield(param, NAME_FLD); |
| 111 |
ZONE *zptr; |
| 112 |
LUENT *lep; |
| 113 |
|
| 114 |
if (nfp == NULL) { |
| 115 |
fputs(progname, stderr); |
| 116 |
fputs(": surface missing name field!\n", stderr); |
| 117 |
return(NULL); |
| 118 |
} |
| 119 |
for (zptr = zone_list; zptr != NULL; zptr = zptr->next) |
| 120 |
if (!strcmp(zptr->zname, zname)) |
| 121 |
break; |
| 122 |
if (zptr == NULL) { |
| 123 |
zptr = new_zone(zname, param); |
| 124 |
} else { /* keep surfaces together */ |
| 125 |
if (!idf_movobject(our_idf, param, zptr->plast)) |
| 126 |
return(NULL); |
| 127 |
zptr->plast = param; |
| 128 |
zptr->nsurf++; |
| 129 |
zptr->ntotal++; |
| 130 |
} |
| 131 |
/* add to lookup table */ |
| 132 |
lep = lu_find(&zonesurf_lut, nfp->val); |
| 133 |
if (lep == NULL) |
| 134 |
return(NULL); |
| 135 |
if (lep->data != NULL) { |
| 136 |
fputs(progname, stderr); |
| 137 |
fputs(": duplicate surface name '", stderr); |
| 138 |
fputs(nfp->val, stderr); |
| 139 |
fputs("'\n", stderr); |
| 140 |
return(NULL); |
| 141 |
} |
| 142 |
lep->key = nfp->val; |
| 143 |
lep->data = (char *)zptr; |
| 144 |
return(zptr); |
| 145 |
} |
| 146 |
|
| 147 |
/* Add a subsurface by finding its base surface and the corresponding zone */ |
| 148 |
static ZONE * |
| 149 |
add_subsurf(IDF_OBJECT *param) |
| 150 |
{ |
| 151 |
IDF_FIELD *bfp = idf_getfield(param, SS_BASE_FLD); |
| 152 |
ZONE *zptr; |
| 153 |
LUENT *lep; |
| 154 |
|
| 155 |
if (bfp == NULL) { |
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fputs(progname, stderr); |
| 157 |
fputs(": missing base field name in subsurface!\n", stderr); |
| 158 |
return(NULL); |
| 159 |
} |
| 160 |
lep = lu_find(&zonesurf_lut, bfp->val); /* find base zone */ |
| 161 |
if (lep == NULL || lep->data == NULL) { |
| 162 |
fputs(progname, stderr); |
| 163 |
fputs(": cannot find referenced base surface '", stderr); |
| 164 |
fputs(bfp->val, stderr); |
| 165 |
fputs("'\n", stderr); |
| 166 |
return(NULL); |
| 167 |
} |
| 168 |
zptr = (ZONE *)lep->data; /* add this subsurface */ |
| 169 |
if (!idf_movobject(our_idf, param, zptr->plast)) |
| 170 |
return(NULL); |
| 171 |
zptr->ntotal++; |
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return(zptr); |
| 173 |
} |
| 174 |
|
| 175 |
/* Return field for vertices in the given object */ |
| 176 |
static IDF_FIELD * |
| 177 |
get_vlist(IDF_OBJECT *param, const char *zname) |
| 178 |
{ |
| 179 |
const int itm_len = sizeof(IDF_FIELD)+6; |
| 180 |
static char fld_buf[4*itm_len]; |
| 181 |
static char *next_fbp = fld_buf; |
| 182 |
int i; |
| 183 |
IDF_FIELD *res; |
| 184 |
/* check if subsurface */ |
| 185 |
if (!strcmp(param->pname, SUBSURF_PNAME)) { |
| 186 |
if (zname != NULL) { |
| 187 |
LUENT *lep = lu_find(&zonesurf_lut, |
| 188 |
idf_getfield(param,SS_BASE_FLD)->val); |
| 189 |
if (strcmp((*(ZONE *)lep->data).zname, zname)) |
| 190 |
return(NULL); |
| 191 |
} |
| 192 |
res = idf_getfield(param, SS_VERT_FLD); |
| 193 |
} else { |
| 194 |
i = 0; /* check for surface type */ |
| 195 |
while (strcmp(surf_type[i].pname, param->pname)) |
| 196 |
if (surf_type[++i].pname == NULL) |
| 197 |
return(NULL); |
| 198 |
|
| 199 |
if (zname != NULL) { /* matches specified zone? */ |
| 200 |
IDF_FIELD *fptr = idf_getfield(param, surf_type[i].zone_fld); |
| 201 |
if (fptr == NULL || strcmp(fptr->val, zname)) |
| 202 |
return(NULL); |
| 203 |
} |
| 204 |
res = idf_getfield(param, surf_type[i].vert_fld); |
| 205 |
} |
| 206 |
if (!res->val[0]) { /* hack for missing #vert */ |
| 207 |
IDF_FIELD *fptr; |
| 208 |
if (next_fbp >= fld_buf+sizeof(fld_buf)) |
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next_fbp = fld_buf; |
| 210 |
i = 0; /* count vertices */ |
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for (fptr = res->next; fptr != NULL; fptr = fptr->next) |
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++i; |
| 213 |
if (i % 3) |
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return(NULL); |
| 215 |
fptr = res->next; |
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res = (IDF_FIELD *)next_fbp; next_fbp += itm_len; |
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res->next = fptr; |
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res->rem = ""; |
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sprintf(res->val, "%d", i/3); |
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} |
| 221 |
return(res); |
| 222 |
} |
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|
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/* Get/allocate surface polygon */ |
| 225 |
static SURFACE * |
| 226 |
get_surface(IDF_FIELD *fptr) |
| 227 |
{ |
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SURFACE *surf; |
| 229 |
int nv; |
| 230 |
FVECT e1, e2, vc; |
| 231 |
int i, j; |
| 232 |
/* get number of vertices */ |
| 233 |
if (fptr == NULL || (nv = atoi(fptr->val)) < 3) { |
| 234 |
fputs(progname, stderr); |
| 235 |
fputs(": bad vertex count for surface!\n", stderr); |
| 236 |
return(NULL); |
| 237 |
} |
| 238 |
surf = (SURFACE *)malloc(sizeof(SURFACE)+sizeof(FVECT)*(nv-3)); |
| 239 |
if (surf == NULL) |
| 240 |
return(NULL); |
| 241 |
surf->nv = nv; |
| 242 |
for (i = nv; i--; ) /* reverse vertex order/orientation */ |
| 243 |
for (j = 0; j < 3; j++) { |
| 244 |
fptr = fptr->next; |
| 245 |
if (fptr == NULL) { |
| 246 |
fputs(progname, stderr); |
| 247 |
fputs(": missing vertex in get_surface()\n", stderr); |
| 248 |
free(surf); |
| 249 |
return(NULL); |
| 250 |
} |
| 251 |
if ((surf->vl[i][j] = atof(fptr->val)) == 0 && |
| 252 |
!isflt(fptr->val)) { |
| 253 |
fputs(progname, stderr); |
| 254 |
fputs(": bad vertex in get_surface()\n", stderr); |
| 255 |
free(surf); |
| 256 |
return(NULL); |
| 257 |
} |
| 258 |
} |
| 259 |
/* compute area and normal */ |
| 260 |
surf->norm[0] = surf->norm[1] = surf->norm[2] = 0; |
| 261 |
VSUB(e1, surf->vl[1], surf->vl[0]); |
| 262 |
for (i = 2; i < nv; i++) { |
| 263 |
VSUB(e2, surf->vl[i], surf->vl[0]); |
| 264 |
fcross(vc, e1, e2); |
| 265 |
surf->norm[0] += vc[0]; |
| 266 |
surf->norm[1] += vc[1]; |
| 267 |
surf->norm[2] += vc[2]; |
| 268 |
VCOPY(e1, e2); |
| 269 |
} |
| 270 |
surf->area = .5 * normalize(surf->norm); |
| 271 |
if (surf->area == 0) { |
| 272 |
fputs(progname, stderr); |
| 273 |
fputs(": degenerate polygon in get_surface()\n", stderr); |
| 274 |
free(surf); |
| 275 |
return(NULL); |
| 276 |
} |
| 277 |
return(surf); |
| 278 |
} |
| 279 |
|
| 280 |
/* Convert surface to Radiance with modifier based on unique name */ |
| 281 |
static int |
| 282 |
rad_surface(IDF_OBJECT *param, FILE *ofp) |
| 283 |
{ |
| 284 |
const char *sname = idf_getfield(param,NAME_FLD)->val; |
| 285 |
IDF_FIELD *fptr = get_vlist(param, NULL); |
| 286 |
const char **fargs; |
| 287 |
int nvert, i, j; |
| 288 |
|
| 289 |
if (fptr == NULL || (nvert = atoi(fptr->val)) < 3) { |
| 290 |
fprintf(stderr, "%s: bad surface '%s'\n", progname, sname); |
| 291 |
return(0); |
| 292 |
} |
| 293 |
fargs = (const char **)malloc(sizeof(const char *)*3*nvert); |
| 294 |
if (fargs == NULL) |
| 295 |
return(0); |
| 296 |
fprintf(ofp, "\nvoid glow '%s'\n0\n0\n4 1 1 1 0\n", sname); |
| 297 |
fprintf(ofp, "\n'%s' polygon 's_%s'\n0\n0\n%d\n", sname, sname, 3*nvert); |
| 298 |
for (j = nvert; j--; ) { /* get arguments in reverse */ |
| 299 |
for (i = 0; i < 3; i++) { |
| 300 |
fptr = fptr->next; |
| 301 |
if (fptr == NULL || !isflt(fptr->val)) { |
| 302 |
fprintf(stderr, |
| 303 |
"%s: missing/bad vertex for %s '%s'\n", |
| 304 |
progname, param->pname, sname); |
| 305 |
return(0); |
| 306 |
} |
| 307 |
fargs[3*j + i] = fptr->val; |
| 308 |
} |
| 309 |
} |
| 310 |
for (j = 0; j < nvert; j++) { /* output reversed verts */ |
| 311 |
for (i = 0; i < 3; i++) { |
| 312 |
fputc('\t', ofp); |
| 313 |
fputs(fargs[3*j + i], ofp); |
| 314 |
} |
| 315 |
fputc('\n', ofp); |
| 316 |
} |
| 317 |
free(fargs); |
| 318 |
return(!ferror(ofp)); |
| 319 |
} |
| 320 |
|
| 321 |
/* Convert subsurface to Radiance with modifier based on unique name */ |
| 322 |
static double |
| 323 |
rad_subsurface(IDF_OBJECT *param, FILE *ofp) |
| 324 |
{ |
| 325 |
const char *sname = idf_getfield(param,NAME_FLD)->val; |
| 326 |
SURFACE *surf = get_surface(idf_getfield(param,SS_VERT_FLD)); |
| 327 |
double area; |
| 328 |
int i; |
| 329 |
|
| 330 |
if (surf == NULL) { |
| 331 |
fprintf(stderr, "%s: bad subsurface '%s'\n", progname, sname); |
| 332 |
return(-1.); |
| 333 |
} |
| 334 |
fprintf(ofp, "\nvoid glow '%s'\n0\n0\n4 1 1 1 0\n", sname); |
| 335 |
fprintf(ofp, "\n'%s' polygon 'ss_%s'\n0\n0\n%d\n", |
| 336 |
sname, sname, 3*surf->nv); |
| 337 |
for (i = 0; i < surf->nv; i++) { /* offset vertices */ |
| 338 |
FVECT vert; |
| 339 |
VSUM(vert, surf->vl[i], surf->norm, 2.*SURF_EPS); |
| 340 |
fprintf(ofp, "\t%.12f %.12f %.12f\n", vert[0], vert[1], vert[2]); |
| 341 |
} |
| 342 |
area = surf->area; |
| 343 |
free(surf); |
| 344 |
if (ferror(ofp)) |
| 345 |
return(-1.); |
| 346 |
return(area); |
| 347 |
} |
| 348 |
|
| 349 |
/* Start rcontrib process */ |
| 350 |
static int |
| 351 |
start_rcontrib(SUBPROC *pd, ZONE *zp) |
| 352 |
{ |
| 353 |
#define BASE_AC 6 |
| 354 |
static char *base_av[BASE_AC] = { |
| 355 |
"rcontrib", "-V+", "-fff", "-h", "-x", "1" |
| 356 |
}; |
| 357 |
char cbuf[300]; |
| 358 |
char **av; |
| 359 |
FILE *ofp; |
| 360 |
IDF_OBJECT *pptr; |
| 361 |
IDF_FIELD *fptr; |
| 362 |
int i, j, n; |
| 363 |
/* start oconv command */ |
| 364 |
sprintf(cbuf, "oconv - > '%s'", temp_octree); |
| 365 |
if ((ofp = popen(cbuf, "w")) == NULL) { |
| 366 |
fputs(progname, stderr); |
| 367 |
fputs(": cannot open oconv process\n", stderr); |
| 368 |
return(0); |
| 369 |
} |
| 370 |
/* allocate argument list */ |
| 371 |
av = (char **)malloc(sizeof(char *)*(BASE_AC+4+2*(zp->ntotal))); |
| 372 |
if (av == NULL) |
| 373 |
return(0); |
| 374 |
for (i = 0; i < BASE_AC; i++) |
| 375 |
av[i] = base_av[i]; |
| 376 |
sprintf(cbuf, "%d", nsamps); |
| 377 |
av[i++] = "-c"; |
| 378 |
av[i++] = cbuf; /* add modifiers & surfaces */ |
| 379 |
for (n = 0, pptr = zp->pfirst; n < zp->nsurf; n++, pptr = pptr->dnext) { |
| 380 |
fptr = idf_getfield(pptr,NAME_FLD); |
| 381 |
if (fptr == NULL || !fptr->val[0]) { |
| 382 |
fputs(progname, stderr); |
| 383 |
fputs(": missing name for surface object\n", stderr); |
| 384 |
return(0); |
| 385 |
} |
| 386 |
if (!rad_surface(pptr, ofp)) /* add surface to octree */ |
| 387 |
return(0); |
| 388 |
av[i++] = "-m"; |
| 389 |
av[i++] = fptr->val; |
| 390 |
} |
| 391 |
/* now subsurfaces */ |
| 392 |
if (zp->ntotal > zp->nsurf) { |
| 393 |
if (zp->area_redu != NULL) |
| 394 |
memset(zp->area_redu, 0, sizeof(float)*zp->nsurf); |
| 395 |
else if ((zp->area_redu = (float *)calloc(zp->nsurf, |
| 396 |
sizeof(float))) == NULL) |
| 397 |
return(0); |
| 398 |
} |
| 399 |
for ( ; n < zp->ntotal; n++, pptr = pptr->dnext) { |
| 400 |
double ssarea; |
| 401 |
const char *bname; |
| 402 |
IDF_OBJECT *pptr1; |
| 403 |
fptr = idf_getfield(pptr,NAME_FLD); |
| 404 |
if (fptr == NULL || !fptr->val[0]) { |
| 405 |
fputs(progname, stderr); |
| 406 |
fputs(": missing name for subsurface object\n", stderr); |
| 407 |
return(0); |
| 408 |
} |
| 409 |
/* add subsurface to octree */ |
| 410 |
if ((ssarea = rad_subsurface(pptr, ofp)) < 0) |
| 411 |
return(0); |
| 412 |
/* mark area for subtraction */ |
| 413 |
bname = idf_getfield(pptr,SS_BASE_FLD)->val; |
| 414 |
for (j = 0, pptr1 = zp->pfirst; |
| 415 |
j < zp->nsurf; j++, pptr1 = pptr1->dnext) |
| 416 |
if (!strcmp(idf_getfield(pptr1,NAME_FLD)->val, bname)) { |
| 417 |
zp->area_redu[j] += ssarea; |
| 418 |
break; |
| 419 |
} |
| 420 |
av[i++] = "-m"; |
| 421 |
av[i++] = fptr->val; |
| 422 |
} |
| 423 |
if (pclose(ofp) != 0) { /* finish oconv */ |
| 424 |
fputs(progname, stderr); |
| 425 |
fputs(": error running oconv process\n", stderr); |
| 426 |
return(0); |
| 427 |
} |
| 428 |
av[i++] = temp_octree; /* add final octree argument */ |
| 429 |
av[i] = NULL; |
| 430 |
if (open_process(pd, av) <= 0) { /* start process */ |
| 431 |
fputs(progname, stderr); |
| 432 |
fputs(": cannot start rcontrib process\n", stderr); |
| 433 |
return(0); |
| 434 |
} |
| 435 |
free(av); /* all done -- clean up */ |
| 436 |
return(1); |
| 437 |
#undef BASE_AC |
| 438 |
} |
| 439 |
|
| 440 |
/* Initialize polygon sampling */ |
| 441 |
static Vert2_list * |
| 442 |
init_poly(POLYSAMP *ps, IDF_FIELD *f0) |
| 443 |
{ |
| 444 |
SURFACE *surf; |
| 445 |
Vert2_list *vl2; |
| 446 |
int i; |
| 447 |
/* get 3-D polygon vertices */ |
| 448 |
if ((surf = get_surface(f0)) == NULL) |
| 449 |
return(NULL); |
| 450 |
vl2 = polyAlloc(surf->nv); |
| 451 |
if (vl2 == NULL) |
| 452 |
return(NULL); |
| 453 |
/* create X & Y axes */ |
| 454 |
VCOPY(ps->sdir[2], surf->norm); |
| 455 |
VSUB(ps->sdir[0], surf->vl[1], surf->vl[0]); |
| 456 |
if (normalize(ps->sdir[0]) == 0) |
| 457 |
return(NULL); |
| 458 |
fcross(ps->sdir[1], ps->sdir[2], ps->sdir[0]); |
| 459 |
/* compute plane offset */ |
| 460 |
ps->poff = DOT(surf->vl[0], ps->sdir[2]); |
| 461 |
/* assign 2-D vertices */ |
| 462 |
for (i = 0; i < surf->nv; i++) { |
| 463 |
vl2->v[i].mX = DOT(surf->vl[i], ps->sdir[0]); |
| 464 |
vl2->v[i].mY = DOT(surf->vl[i], ps->sdir[1]); |
| 465 |
} |
| 466 |
ps->area_left = surf->area; |
| 467 |
free(surf); /* it's ready! */ |
| 468 |
vl2->p = (void *)ps; |
| 469 |
return(vl2); |
| 470 |
} |
| 471 |
|
| 472 |
/* Generate samples on 2-D triangle */ |
| 473 |
static int |
| 474 |
sample_triangle(const Vert2_list *vl2, int a, int b, int c) |
| 475 |
{ |
| 476 |
POLYSAMP *ps = (POLYSAMP *)vl2->p; |
| 477 |
float *samp; |
| 478 |
FVECT orig; |
| 479 |
FVECT ab, ac; |
| 480 |
double area; |
| 481 |
int i, j, ns; |
| 482 |
/* compute sampling axes */ |
| 483 |
for (i = 3; i--; ) { |
| 484 |
orig[i] = vl2->v[a].mX*ps->sdir[0][i] + |
| 485 |
vl2->v[a].mY*ps->sdir[1][i] + |
| 486 |
(ps->poff+SURF_EPS)*ps->sdir[2][i]; |
| 487 |
ab[i] = (vl2->v[b].mX - vl2->v[a].mX)*ps->sdir[0][i] + |
| 488 |
(vl2->v[b].mY - vl2->v[a].mY)*ps->sdir[1][i]; |
| 489 |
ac[i] = (vl2->v[c].mX - vl2->v[a].mX)*ps->sdir[0][i] + |
| 490 |
(vl2->v[c].mY - vl2->v[a].mY)*ps->sdir[1][i]; |
| 491 |
} |
| 492 |
/* compute number of samples to take */ |
| 493 |
area = .5*(vl2->v[a].mX*vl2->v[b].mY - vl2->v[b].mX*vl2->v[a].mY + |
| 494 |
vl2->v[b].mX*vl2->v[c].mY - vl2->v[c].mX*vl2->v[b].mY + |
| 495 |
vl2->v[c].mX*vl2->v[a].mY - vl2->v[a].mX*vl2->v[c].mY); |
| 496 |
if (area < .0) { |
| 497 |
fputs(progname, stderr); |
| 498 |
fputs(": negative triangle area in sample_triangle()\n", stderr); |
| 499 |
return(0); |
| 500 |
} |
| 501 |
if (area >= ps->area_left) { |
| 502 |
ns = ps->samp_left; |
| 503 |
ps->area_left = 0; |
| 504 |
} else { |
| 505 |
ns = (ps->samp_left*area/ps->area_left + .5); |
| 506 |
ps->samp_left -= ns; |
| 507 |
ps->area_left -= area; |
| 508 |
} |
| 509 |
if (ns <= 0) /* XXX should be error? */ |
| 510 |
return(1); |
| 511 |
/* buffer sample rays */ |
| 512 |
samp = (float *)malloc(sizeof(float)*6*ns); |
| 513 |
if (samp == NULL) |
| 514 |
return(0); |
| 515 |
for (i = ns; i--; ) { /* stratified Monte Carlo sampling */ |
| 516 |
double sv[4]; |
| 517 |
FVECT dv; |
| 518 |
multisamp(sv, 4, (i+frandom())/(double)ns); |
| 519 |
sv[0] *= sv[1] = sqrt(sv[1]); |
| 520 |
sv[1] = 1. - sv[1]; |
| 521 |
for (j = 3; j--; ) |
| 522 |
samp[i*6 + j] = orig[j] + sv[0]*ab[j] + sv[1]*ac[j]; |
| 523 |
sv[2] = sqrt(sv[2]); |
| 524 |
sv[3] *= 2.*PI; |
| 525 |
dv[0] = tcos(sv[3]) * sv[2]; |
| 526 |
dv[1] = tsin(sv[3]) * sv[2]; |
| 527 |
dv[2] = sqrt(1. - sv[2]*sv[2]); |
| 528 |
for (j = 3; j--; ) |
| 529 |
samp[i*6 + 3 + j] = dv[0]*ps->sdir[0][j] + |
| 530 |
dv[1]*ps->sdir[1][j] + |
| 531 |
dv[2]*ps->sdir[2][j] ; |
| 532 |
} |
| 533 |
/* send to our process */ |
| 534 |
writebuf(ps->wd, (char *)samp, sizeof(float)*6*ns); |
| 535 |
free(samp); /* that's it! */ |
| 536 |
return(1); |
| 537 |
} |
| 538 |
|
| 539 |
/* Sample the given surface */ |
| 540 |
static double |
| 541 |
sample_surface(IDF_OBJECT *param, int wd) |
| 542 |
{ |
| 543 |
POLYSAMP psamp; |
| 544 |
double area; |
| 545 |
int nv; |
| 546 |
Vert2_list *vlist2; |
| 547 |
/* set up our polygon sampler */ |
| 548 |
if ((vlist2 = init_poly(&psamp, get_vlist(param, NULL))) == NULL) { |
| 549 |
fprintf(stderr, "%s: bad polygon %s '%s'\n", |
| 550 |
progname, param->pname, |
| 551 |
idf_getfield(param,NAME_FLD)->val); |
| 552 |
return(-1.); |
| 553 |
} |
| 554 |
psamp.samp_left = nsamps; /* assign samples & destination */ |
| 555 |
psamp.wd = wd; |
| 556 |
/* hack for subsurface sampling */ |
| 557 |
psamp.poff += 2.*SURF_EPS * !strcmp(param->pname, SUBSURF_PNAME); |
| 558 |
|
| 559 |
area = psamp.area_left; /* remember starting surface area */ |
| 560 |
/* sample each subtriangle */ |
| 561 |
if (!polyTriangulate(vlist2, &sample_triangle)) |
| 562 |
return(-1.); |
| 563 |
polyFree(vlist2); /* clean up and return */ |
| 564 |
return(area); |
| 565 |
} |
| 566 |
|
| 567 |
/* Compute User View Factors using open rcontrib process */ |
| 568 |
static int |
| 569 |
compute_uvfs(SUBPROC *pd, ZONE *zp) |
| 570 |
{ |
| 571 |
IDF_OBJECT *pptr, *pout, *pptr1; |
| 572 |
float *uvfa; |
| 573 |
char uvfbuf[24]; |
| 574 |
int n, m; |
| 575 |
/* create output object */ |
| 576 |
pout = idf_newobject(our_idf, UVF_PNAME, |
| 577 |
" ! computed by Radiance\n ", our_idf->plast); |
| 578 |
if (pout == NULL) { |
| 579 |
fputs(progname, stderr); |
| 580 |
fputs(": cannot create new IDF object\n", stderr); |
| 581 |
return(0); |
| 582 |
} |
| 583 |
if (!idf_addfield(pout, zp->zname, |
| 584 |
" !- Zone Name\n ")) { |
| 585 |
fputs(progname, stderr); |
| 586 |
fputs(": cannot add zone name field\n", stderr); |
| 587 |
return(0); |
| 588 |
} |
| 589 |
/* allocate read buffer */ |
| 590 |
uvfa = (float *)malloc(sizeof(float)*3*zp->ntotal); |
| 591 |
if (uvfa == NULL) |
| 592 |
return(0); |
| 593 |
/* UVFs from each surface */ |
| 594 |
for (n = 0, pptr = zp->pfirst; n < zp->ntotal; n++, pptr = pptr->dnext) { |
| 595 |
double vfsum = 0; |
| 596 |
double adj_factor; |
| 597 |
/* send samples to rcontrib */ |
| 598 |
if ((adj_factor = sample_surface(pptr, pd->w)) < 0) |
| 599 |
return(0); |
| 600 |
if (zp->area_redu == NULL) |
| 601 |
adj_factor = 1.; |
| 602 |
else /* comp. for subsurface area */ |
| 603 |
adj_factor /= adj_factor - zp->area_redu[n]; |
| 604 |
/* read results */ |
| 605 |
if (readbuf(pd->r, (char *)uvfa, sizeof(float)*3*zp->ntotal) != |
| 606 |
sizeof(float)*3*zp->ntotal) { |
| 607 |
fputs(progname, stderr); |
| 608 |
fputs(": read error from rcontrib process\n", stderr); |
| 609 |
return(0); |
| 610 |
} |
| 611 |
/* append UVF fields */ |
| 612 |
for (m = 0, pptr1 = zp->pfirst; |
| 613 |
m < zp->ntotal; m++, pptr1 = pptr1->dnext) { |
| 614 |
const double uvf = uvfa[3*m + 1] * adj_factor; |
| 615 |
vfsum += uvf; |
| 616 |
if (pptr1 == pptr && uvf > .001) |
| 617 |
fprintf(stderr, |
| 618 |
"%s: warning - non-zero self-VF (%.1f%%) for surface '%s'\n", |
| 619 |
progname, 100.*uvf, |
| 620 |
idf_getfield(pptr,NAME_FLD)->val); |
| 621 |
sprintf(uvfbuf, "%.4f", uvf); |
| 622 |
if (!idf_addfield(pout, |
| 623 |
idf_getfield(pptr,NAME_FLD)->val, NULL) || |
| 624 |
!idf_addfield(pout, |
| 625 |
idf_getfield(pptr1,NAME_FLD)->val, NULL) || |
| 626 |
!idf_addfield(pout, uvfbuf, |
| 627 |
(n+m < 2*zp->ntotal-2) ? |
| 628 |
"\n " : "\n\n")) { |
| 629 |
fputs(progname, stderr); |
| 630 |
fputs(": error adding UVF fields\n", stderr); |
| 631 |
return(0); |
| 632 |
} |
| 633 |
} |
| 634 |
if (vfsum < 0.95) |
| 635 |
fprintf(stderr, |
| 636 |
"%s: warning - missing %.1f%% of energy from surface '%s'\n", |
| 637 |
progname, 100.*(1.-vfsum), |
| 638 |
idf_getfield(pptr,NAME_FLD)->val); |
| 639 |
} |
| 640 |
free(uvfa); /* clean up and return */ |
| 641 |
return(1); |
| 642 |
} |
| 643 |
|
| 644 |
/* Compute zone User View Factors */ |
| 645 |
static int |
| 646 |
compute_zones(void) |
| 647 |
{ |
| 648 |
ZONE *zptr; |
| 649 |
/* temporary octree name */ |
| 650 |
mktemp(strcpy(temp_octree, TEMPLATE)); |
| 651 |
/* compute each zone */ |
| 652 |
for (zptr = zone_list; zptr != NULL; zptr = zptr->next) { |
| 653 |
SUBPROC rcproc; |
| 654 |
/* start rcontrib process */ |
| 655 |
if (!start_rcontrib(&rcproc, zptr)) |
| 656 |
return(0); |
| 657 |
/* compute+add view factors */ |
| 658 |
if (!compute_uvfs(&rcproc, zptr)) |
| 659 |
return(0); |
| 660 |
if (close_process(&rcproc) != 0) { |
| 661 |
fputs(progname, stderr); |
| 662 |
fputs(": bad return status from rcontrib\n", stderr); |
| 663 |
return(0); |
| 664 |
} |
| 665 |
} |
| 666 |
unlink(temp_octree); /* remove octree file */ |
| 667 |
return(1); |
| 668 |
} |
| 669 |
|
| 670 |
/* Load IDF and compute User View Factors */ |
| 671 |
int |
| 672 |
main(int argc, char *argv[]) |
| 673 |
{ |
| 674 |
int incl_comments = 1; |
| 675 |
char *origIDF, *revIDF; |
| 676 |
IDF_OBJECT *pptr; |
| 677 |
int i; |
| 678 |
|
| 679 |
progname = *argv++; argc--; /* get options if any */ |
| 680 |
while (argc > 1 && argv[0][0] == '-') |
| 681 |
switch (argv[0][1]) { |
| 682 |
case 'c': /* elide comments */ |
| 683 |
incl_comments = -1; /* header only */ |
| 684 |
argv++; argc--; |
| 685 |
continue; |
| 686 |
case 's': /* samples */ |
| 687 |
nsamps = 1000*atoi(*++argv); |
| 688 |
argv++; argc -= 2; |
| 689 |
continue; |
| 690 |
default: |
| 691 |
fputs(progname, stderr); |
| 692 |
fputs(": unknown option '", stderr); |
| 693 |
fputs(argv[0], stderr); |
| 694 |
fputs("'\n", stderr); |
| 695 |
goto userr; |
| 696 |
} |
| 697 |
if ((argc < 1) | (argc > 2)) |
| 698 |
goto userr; |
| 699 |
origIDF = argv[0]; |
| 700 |
revIDF = (argc == 1) ? argv[0] : argv[1]; |
| 701 |
/* load Input Data File */ |
| 702 |
our_idf = idf_load(origIDF); |
| 703 |
if (our_idf == NULL) { |
| 704 |
fputs(progname, stderr); |
| 705 |
fputs(": cannot load IDF '", stderr); |
| 706 |
fputs(origIDF, stderr); |
| 707 |
fputs("'\n", stderr); |
| 708 |
return(1); |
| 709 |
} |
| 710 |
/* remove existing UVFs */ |
| 711 |
if ((pptr = idf_getobject(our_idf, UVF_PNAME)) != NULL) { |
| 712 |
IDF_OBJECT *pnext; |
| 713 |
fputs(progname, stderr); |
| 714 |
fputs(": removing previous User View Factors\n", stderr); |
| 715 |
do { |
| 716 |
pnext = pptr->pnext; |
| 717 |
idf_delobject(our_idf, pptr); |
| 718 |
} while (pnext != NULL); |
| 719 |
} |
| 720 |
/* add to header */ |
| 721 |
if (our_idf->hrem == NULL || |
| 722 |
(i = strlen(our_idf->hrem)-strlen(ADD_HEADER)) < 0 || |
| 723 |
strcmp(our_idf->hrem+i, ADD_HEADER)) |
| 724 |
idf_add2hdr(our_idf, ADD_HEADER); |
| 725 |
/* gather zone surfaces */ |
| 726 |
for (i = 0; surf_type[i].pname != NULL; i++) |
| 727 |
for (pptr = idf_getobject(our_idf, surf_type[i].pname); |
| 728 |
pptr != NULL; pptr = pptr->pnext) { |
| 729 |
IDF_FIELD *fptr = idf_getfield(pptr, |
| 730 |
surf_type[i].zone_fld); |
| 731 |
if (fptr == NULL) { |
| 732 |
fputs(progname, stderr); |
| 733 |
fputs(": warning - missing zone field\n", stderr); |
| 734 |
continue; |
| 735 |
} |
| 736 |
if (add2zone(pptr, fptr->val) == NULL) |
| 737 |
return(1); |
| 738 |
} |
| 739 |
/* add subsurfaces */ |
| 740 |
for (pptr = idf_getobject(our_idf, SUBSURF_PNAME); |
| 741 |
pptr != NULL; pptr = pptr->pnext) |
| 742 |
if (add_subsurf(pptr) == NULL) |
| 743 |
return(1); |
| 744 |
/* run rcontrib on each zone */ |
| 745 |
if (!compute_zones()) |
| 746 |
return(1); |
| 747 |
/* write out modified IDF */ |
| 748 |
if (!idf_write(our_idf, revIDF, incl_comments)) { |
| 749 |
fputs(progname, stderr); |
| 750 |
fputs(": error writing IDF '", stderr); |
| 751 |
fputs(revIDF, stderr); |
| 752 |
fputs("'\n", stderr); |
| 753 |
return(1); |
| 754 |
} |
| 755 |
return(0); /* finito! */ |
| 756 |
userr: |
| 757 |
fputs("Usage: ", stderr); |
| 758 |
fputs(progname, stderr); |
| 759 |
fputs(" [-c][-s Ksamps] Model.idf [Revised.idf]\n", stderr); |
| 760 |
return(1); |
| 761 |
} |
