| 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 |
| 90 |
|
*/ |
| 91 |
|
|
| 92 |
|
#include <string.h> |
| 93 |
+ |
#include <time.h> |
| 94 |
|
|
| 95 |
|
#include "ray.h" |
| 96 |
|
#include "source.h" |
| 119 |
|
|
| 120 |
|
int do_irrad = 0; /* compute irradiance? */ |
| 121 |
|
|
| 122 |
+ |
int rand_samp = 0; /* pure Monte Carlo sampling? */ |
| 123 |
+ |
|
| 124 |
|
double dstrsrc = 0.0; /* square source distribution */ |
| 125 |
|
double shadthresh = .03; /* shadow threshold */ |
| 126 |
|
double shadcert = .75; /* shadow certainty */ |
| 154 |
|
int ambincl = -1; /* include == 1, exclude == 0 */ |
| 155 |
|
|
| 156 |
|
|
| 157 |
< |
extern void |
| 157 |
> |
void |
| 158 |
|
ray_init( /* initialize ray-tracing calculation */ |
| 159 |
|
char *otnm |
| 160 |
|
) |
| 165 |
|
if (ofun[OBJ_SPHERE].funp == o_default) |
| 166 |
|
initotypes(); |
| 167 |
|
/* initialize urand */ |
| 168 |
< |
initurand(2048); |
| 168 |
> |
if (rand_samp) { |
| 169 |
> |
srandom((long)time(0)); |
| 170 |
> |
initurand(0); |
| 171 |
> |
} else { |
| 172 |
> |
srandom(0L); |
| 173 |
> |
initurand(2048); |
| 174 |
> |
} |
| 175 |
|
/* read scene octree */ |
| 176 |
|
readoct(octname = otnm, ~(IO_FILES|IO_INFO), &thescene, NULL); |
| 177 |
|
nsceneobjs = nobjects; |
| 182 |
|
/* ready to go... */ |
| 183 |
|
} |
| 184 |
|
|
| 185 |
< |
extern void |
| 185 |
> |
void |
| 186 |
|
ray_trace( /* trace a primary ray */ |
| 187 |
|
RAY *r |
| 188 |
|
) |
| 189 |
|
{ |
| 190 |
< |
rayorigin(r, NULL, PRIMARY, 1.0); |
| 190 |
> |
rayorigin(r, PRIMARY, NULL, NULL); |
| 191 |
|
samplendx++; |
| 192 |
|
rayvalue(r); /* assumes origin and direction are set */ |
| 193 |
|
} |
| 194 |
|
|
| 195 |
|
|
| 196 |
< |
extern void |
| 196 |
> |
void |
| 197 |
|
ray_done( /* free ray-tracing data */ |
| 198 |
|
int freall |
| 199 |
|
) |
| 221 |
|
} |
| 222 |
|
|
| 223 |
|
|
| 224 |
< |
extern void |
| 224 |
> |
void |
| 225 |
|
ray_save( /* save current parameter settings */ |
| 226 |
|
RAYPARAMS *rp |
| 227 |
|
) |
| 272 |
|
} |
| 273 |
|
|
| 274 |
|
|
| 275 |
< |
extern void |
| 275 |
> |
void |
| 276 |
|
ray_restore( /* restore parameter settings */ |
| 277 |
|
RAYPARAMS *rp |
| 278 |
|
) |
| 340 |
|
} |
| 341 |
|
|
| 342 |
|
|
| 343 |
< |
extern void |
| 343 |
> |
void |
| 344 |
|
ray_defaults( /* get default parameter values */ |
| 345 |
|
RAYPARAMS *rp |
| 346 |
|
) |
| 371 |
|
memset(rp->ambfile, '\0', sizeof(rp->ambfile)); |
| 372 |
|
rp->ambvwt = 0; |
| 373 |
|
rp->ambres = 256; |
| 374 |
< |
rp->ambacc = 0.1; |
| 374 |
> |
rp->ambacc = 0.15; |
| 375 |
|
rp->ambdiv = 1024; |
| 376 |
|
rp->ambssamp = 512; |
| 377 |
|
rp->ambounce = 0; |
