| 23 |
|
* sort of context, so it is impossible to simultaneously run |
| 24 |
|
* this library on multiple scenes or in multiple threads. |
| 25 |
|
* You get one scene and one thread, and if you want more, you |
| 26 |
< |
* will have to go with the process model used by the programs |
| 27 |
< |
* gen/mkillum, hd/rholo, and px/pinterp. Finally, unrecoverable |
| 28 |
< |
* errors result in a call to the application-defined function |
| 29 |
< |
* quit(). The usual thing to do is to call exit(). |
| 26 |
> |
* will have to go with the process model defined in raypcalls.c. |
| 27 |
> |
* Finally, unrecoverable errors result in a call to the application- |
| 28 |
> |
* defined function quit(). The usual thing to do is to call exit(). |
| 29 |
|
* You might want to do something else instead, like |
| 30 |
|
* call setjmp()/longjmp() to bring you back to the calling |
| 31 |
|
* function for recovery. You may also wish to define your own |
| 36 |
|
* as simple as we can. Global variables and their defaults |
| 37 |
|
* are defined below, and including "ray.h" declares these |
| 38 |
|
* along with all the routines you are likely to need. First, |
| 39 |
< |
* assign the global variable progname to your argv[0], then |
| 40 |
< |
* change the rendering parameters as you like. If you have a set |
| 41 |
< |
* of option arguments you are working from, the getrenderopt(ac,av) |
| 39 |
> |
* assign the global variable progname by calling fixargv0(argv[0]), |
| 40 |
> |
* then change the rendering parameters as you like. If you have a |
| 41 |
> |
* set of option arguments you are working from, the getrenderopt() |
| 42 |
|
* call should be very useful. Before tracing any rays, you |
| 43 |
|
* must read in the octree with a call to ray_init(oct). |
| 44 |
|
* Passing NULL for the file name causes ray_init() to read |
| 90 |
|
*/ |
| 91 |
|
|
| 92 |
|
#include <string.h> |
| 93 |
+ |
#include <time.h> |
| 94 |
|
|
| 95 |
|
#include "ray.h" |
| 96 |
|
#include "source.h" |
| 97 |
+ |
#include "bsdf.h" |
| 98 |
|
#include "ambient.h" |
| 99 |
|
#include "otypes.h" |
| 100 |
|
#include "random.h" |
| 101 |
+ |
#include "func.h" |
| 102 |
|
#include "data.h" |
| 103 |
|
#include "font.h" |
| 104 |
+ |
#include "pmapray.h" |
| 105 |
|
|
| 103 |
– |
char *progname = "unknown_app"; /* caller sets to argv[0] */ |
| 104 |
– |
|
| 106 |
|
char *octname; /* octree name we are given */ |
| 107 |
|
|
| 107 |
– |
char *shm_boundary = NULL; /* boundary of shared memory */ |
| 108 |
– |
|
| 108 |
|
CUBE thescene; /* our scene */ |
| 109 |
|
OBJECT nsceneobjs; /* number of objects in our scene */ |
| 110 |
|
|
| 114 |
|
|
| 115 |
|
void (*trace)() = NULL; /* trace call */ |
| 116 |
|
|
| 118 |
– |
extern void ambnotify(); |
| 117 |
|
void (*addobjnotify[8])() = {ambnotify, NULL}; |
| 118 |
|
|
| 119 |
+ |
int castonly = 0; /* only doing ray-casting? */ |
| 120 |
+ |
|
| 121 |
|
int do_irrad = 0; /* compute irradiance? */ |
| 122 |
|
|
| 123 |
+ |
int rand_samp = 1; /* pure Monte Carlo sampling? */ |
| 124 |
+ |
|
| 125 |
|
double dstrsrc = 0.0; /* square source distribution */ |
| 126 |
|
double shadthresh = .03; /* shadow threshold */ |
| 127 |
|
double shadcert = .75; /* shadow certainty */ |
| 140 |
|
|
| 141 |
|
int backvis = 1; /* back face visibility */ |
| 142 |
|
|
| 143 |
< |
int maxdepth = 8; /* maximum recursion depth */ |
| 144 |
< |
double minweight = 2e-3; /* minimum ray weight */ |
| 143 |
> |
int maxdepth = -10; /* maximum recursion depth */ |
| 144 |
> |
double minweight = 1e-4; /* minimum ray weight */ |
| 145 |
|
|
| 146 |
|
char *ambfile = NULL; /* ambient file name */ |
| 147 |
|
COLOR ambval = BLKCOLOR; /* ambient value */ |
| 155 |
|
int ambincl = -1; /* include == 1, exclude == 0 */ |
| 156 |
|
|
| 157 |
|
|
| 158 |
+ |
static void |
| 159 |
+ |
reset_random(void) /* re-initialize random number generator */ |
| 160 |
+ |
{ |
| 161 |
+ |
if (rand_samp) { |
| 162 |
+ |
srandom((long)time(0)); |
| 163 |
+ |
initurand(0); |
| 164 |
+ |
} else { |
| 165 |
+ |
srandom(0L); |
| 166 |
+ |
initurand(2048); |
| 167 |
+ |
} |
| 168 |
+ |
} |
| 169 |
+ |
|
| 170 |
+ |
|
| 171 |
|
void |
| 172 |
< |
ray_init(otnm) /* initialize ray-tracing calculation */ |
| 173 |
< |
char *otnm; |
| 172 |
> |
ray_init( /* initialize ray-tracing calculation */ |
| 173 |
> |
char *otnm |
| 174 |
> |
) |
| 175 |
|
{ |
| 176 |
|
if (nobjects > 0) /* free old scene data */ |
| 177 |
|
ray_done(0); |
| 178 |
|
/* initialize object types */ |
| 179 |
|
if (ofun[OBJ_SPHERE].funp == o_default) |
| 180 |
|
initotypes(); |
| 181 |
+ |
/* initialize calcomp routines */ |
| 182 |
+ |
initfunc(); |
| 183 |
|
/* initialize urand */ |
| 184 |
< |
initurand(2048); |
| 185 |
< |
/* read scene octree */ |
| 186 |
< |
readoct(octname = otnm, ~(IO_FILES|IO_INFO), &thescene, NULL); |
| 184 |
> |
reset_random(); |
| 185 |
> |
/* initialize spectral sampling */ |
| 186 |
> |
if (setspectrsamp(CNDX, WLPART) < 0) |
| 187 |
> |
error(USER, "unsupported spectral sampling"); |
| 188 |
> |
|
| 189 |
> |
octname = savqstr(otnm); /* read scene octree */ |
| 190 |
> |
readoct(octname, ~(IO_FILES|IO_INFO), &thescene, NULL); |
| 191 |
|
nsceneobjs = nobjects; |
| 192 |
< |
/* find and mark sources */ |
| 193 |
< |
marksources(); |
| 194 |
< |
/* initialize ambient calculation */ |
| 195 |
< |
setambient(); |
| 196 |
< |
/* ready to go... */ |
| 192 |
> |
|
| 193 |
> |
if (!castonly) { /* any actual ray traversal to do? */ |
| 194 |
> |
|
| 195 |
> |
ray_init_pmap(); /* PMAP: set up & load photon maps */ |
| 196 |
> |
|
| 197 |
> |
marksources(); /* find and mark sources */ |
| 198 |
> |
|
| 199 |
> |
setambient(); /* initialize ambient calculation */ |
| 200 |
> |
} else |
| 201 |
> |
distantsources(); /* else mark only distant sources */ |
| 202 |
|
} |
| 203 |
|
|
| 204 |
+ |
|
| 205 |
|
void |
| 206 |
< |
ray_trace(r) /* trace a primary ray */ |
| 207 |
< |
RAY *r; |
| 206 |
> |
ray_trace( /* trace a primary ray */ |
| 207 |
> |
RAY *r |
| 208 |
> |
) |
| 209 |
|
{ |
| 210 |
< |
rayorigin(r, NULL, PRIMARY, 1.0); |
| 210 |
> |
rayorigin(r, PRIMARY, NULL, NULL); |
| 211 |
|
samplendx++; |
| 212 |
|
rayvalue(r); /* assumes origin and direction are set */ |
| 213 |
|
} |
| 214 |
|
|
| 215 |
|
|
| 216 |
|
void |
| 217 |
< |
ray_done(freall) /* free ray-tracing data */ |
| 218 |
< |
int freall; |
| 217 |
> |
ray_done( /* free ray-tracing data */ |
| 218 |
> |
int freall |
| 219 |
> |
) |
| 220 |
|
{ |
| 221 |
|
retainfonts = 1; |
| 222 |
|
ambdone(); |
| 226 |
|
donesets(); |
| 227 |
|
octdone(); |
| 228 |
|
thescene.cutree = EMPTY; |
| 229 |
< |
octname = NULL; |
| 229 |
> |
freeqstr(octname); octname = NULL; |
| 230 |
> |
retainfonts = 0; |
| 231 |
|
if (freall) { |
| 201 |
– |
retainfonts = 0; |
| 232 |
|
freefont(NULL); |
| 233 |
|
freedata(NULL); |
| 234 |
+ |
SDfreeCache(NULL); |
| 235 |
|
initurand(0); |
| 236 |
|
} |
| 237 |
|
if (nobjects > 0) { |
| 238 |
< |
sprintf(errmsg, "%d objects left after call to ray_done()", |
| 239 |
< |
nobjects); |
| 238 |
> |
sprintf(errmsg, "%ld objects left after call to ray_done()", |
| 239 |
> |
(long)nobjects); |
| 240 |
|
error(WARNING, errmsg); |
| 241 |
|
} |
| 242 |
+ |
|
| 243 |
+ |
ray_done_pmap(); |
| 244 |
|
} |
| 245 |
|
|
| 246 |
|
|
| 247 |
|
void |
| 248 |
< |
ray_save(rp) /* save current parameter settings */ |
| 249 |
< |
RAYPARAMS *rp; |
| 248 |
> |
ray_save( /* save current parameter settings */ |
| 249 |
> |
RAYPARAMS *rp |
| 250 |
> |
) |
| 251 |
|
{ |
| 252 |
|
int i, ndx; |
| 253 |
|
|
| 254 |
|
if (rp == NULL) |
| 255 |
|
return; |
| 256 |
|
rp->do_irrad = do_irrad; |
| 257 |
+ |
rp->rand_samp = rand_samp; |
| 258 |
|
rp->dstrsrc = dstrsrc; |
| 259 |
|
rp->shadthresh = shadthresh; |
| 260 |
|
rp->shadcert = shadcert; |
| 271 |
|
rp->backvis = backvis; |
| 272 |
|
rp->maxdepth = maxdepth; |
| 273 |
|
rp->minweight = minweight; |
| 239 |
– |
copycolor(rp->ambval, ambval); |
| 240 |
– |
memset(rp->ambfile, '\0', sizeof(rp->ambfile)); |
| 274 |
|
if (ambfile != NULL) |
| 275 |
|
strncpy(rp->ambfile, ambfile, sizeof(rp->ambfile)-1); |
| 276 |
+ |
else |
| 277 |
+ |
memset(rp->ambfile, '\0', sizeof(rp->ambfile)); |
| 278 |
+ |
copycolor(rp->ambval, ambval); |
| 279 |
|
rp->ambvwt = ambvwt; |
| 280 |
|
rp->ambacc = ambacc; |
| 281 |
|
rp->ambres = ambres; |
| 290 |
|
if (ndx+len >= sizeof(rp->amblval)) |
| 291 |
|
break; |
| 292 |
|
strcpy(rp->amblval+ndx, amblist[i]); |
| 293 |
+ |
rp->amblndx[i] = ndx; |
| 294 |
|
ndx += len+1; |
| 295 |
|
} |
| 296 |
|
while (i <= AMBLLEN) |
| 297 |
|
rp->amblndx[i++] = -1; |
| 298 |
+ |
|
| 299 |
+ |
/* PMAP: save photon mapping params */ |
| 300 |
+ |
ray_save_pmap(rp); |
| 301 |
|
} |
| 302 |
|
|
| 303 |
|
|
| 304 |
|
void |
| 305 |
< |
ray_restore(rp) /* restore parameter settings */ |
| 306 |
< |
RAYPARAMS *rp; |
| 305 |
> |
ray_restore( /* restore parameter settings */ |
| 306 |
> |
RAYPARAMS *rp |
| 307 |
> |
) |
| 308 |
|
{ |
| 309 |
< |
register int i; |
| 309 |
> |
int i; |
| 310 |
|
|
| 311 |
|
if (rp == NULL) { /* restore defaults */ |
| 312 |
|
RAYPARAMS dflt; |
| 316 |
|
} |
| 317 |
|
/* restore saved settings */ |
| 318 |
|
do_irrad = rp->do_irrad; |
| 319 |
+ |
if (!rand_samp != !rp->rand_samp) { |
| 320 |
+ |
rand_samp = rp->rand_samp; |
| 321 |
+ |
reset_random(); |
| 322 |
+ |
} |
| 323 |
|
dstrsrc = rp->dstrsrc; |
| 324 |
|
shadthresh = rp->shadthresh; |
| 325 |
|
shadcert = rp->shadcert; |
| 341 |
|
ambdiv = rp->ambdiv; |
| 342 |
|
ambssamp = rp->ambssamp; |
| 343 |
|
ambounce = rp->ambounce; |
| 344 |
+ |
/* a bit dangerous if not static */ |
| 345 |
|
for (i = 0; rp->amblndx[i] >= 0; i++) |
| 346 |
|
amblist[i] = rp->amblval + rp->amblndx[i]; |
| 347 |
|
while (i <= AMBLLEN) |
| 349 |
|
ambincl = rp->ambincl; |
| 350 |
|
/* update ambient calculation */ |
| 351 |
|
ambnotify(OVOID); |
| 352 |
< |
if (thescene.cutree != EMPTY) { |
| 352 |
> |
if ((thescene.cutree != EMPTY) & !castonly) { |
| 353 |
|
int newamb = (ambfile == NULL) ? rp->ambfile[0] : |
| 354 |
|
strcmp(ambfile, rp->ambfile) ; |
| 355 |
|
|
| 371 |
|
ambres = rp->ambres; |
| 372 |
|
ambacc = rp->ambacc; |
| 373 |
|
} |
| 374 |
+ |
|
| 375 |
+ |
/* PMAP: restore photon mapping params */ |
| 376 |
+ |
ray_restore_pmap(rp); |
| 377 |
|
} |
| 378 |
|
|
| 379 |
|
|
| 380 |
|
void |
| 381 |
< |
ray_defaults(rp) /* get default parameter values */ |
| 382 |
< |
RAYPARAMS *rp; |
| 381 |
> |
ray_defaults( /* get default parameter values */ |
| 382 |
> |
RAYPARAMS *rp |
| 383 |
> |
) |
| 384 |
|
{ |
| 385 |
|
int i; |
| 386 |
|
|
| 388 |
|
return; |
| 389 |
|
|
| 390 |
|
rp->do_irrad = 0; |
| 391 |
+ |
rp->rand_samp = 1; |
| 392 |
|
rp->dstrsrc = 0.0; |
| 393 |
< |
rp->shadthresh = .03; |
| 394 |
< |
rp->shadcert = .75; |
| 393 |
> |
rp->shadthresh = 0.03; |
| 394 |
> |
rp->shadcert = 0.75; |
| 395 |
|
rp->directrelay = 2; |
| 396 |
|
rp->vspretest = 512; |
| 397 |
|
rp->directvis = 1; |
| 400 |
|
setcolor(rp->salbedo, 0., 0., 0.); |
| 401 |
|
rp->seccg = 0.; |
| 402 |
|
rp->ssampdist = 0.; |
| 403 |
< |
rp->specthresh = .15; |
| 403 |
> |
rp->specthresh = 0.15; |
| 404 |
|
rp->specjitter = 1.; |
| 405 |
|
rp->backvis = 1; |
| 406 |
< |
rp->maxdepth = 8; |
| 407 |
< |
rp->minweight = 2e-3; |
| 357 |
< |
setcolor(rp->ambval, 0., 0., 0.); |
| 406 |
> |
rp->maxdepth = -10; |
| 407 |
> |
rp->minweight = 1e-4; |
| 408 |
|
memset(rp->ambfile, '\0', sizeof(rp->ambfile)); |
| 409 |
+ |
setcolor(rp->ambval, 0., 0., 0.); |
| 410 |
|
rp->ambvwt = 0; |
| 411 |
|
rp->ambres = 256; |
| 412 |
|
rp->ambacc = 0.1; |
| 417 |
|
memset(rp->amblval, '\0', sizeof(rp->amblval)); |
| 418 |
|
for (i = AMBLLEN+1; i--; ) |
| 419 |
|
rp->amblndx[i] = -1; |
| 420 |
+ |
|
| 421 |
+ |
/* PMAP: restore photon mapping defaults */ |
| 422 |
+ |
ray_defaults_pmap(rp); |
| 423 |
|
} |
