| 90 |
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*/ |
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#include <string.h> |
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+ |
#include <time.h> |
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#include "ray.h" |
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#include "source.h" |
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int do_irrad = 0; /* compute irradiance? */ |
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+ |
int rand_samp = 0; /* pure Monte Carlo sampling? */ |
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+ |
|
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double dstrsrc = 0.0; /* square source distribution */ |
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double shadthresh = .03; /* shadow threshold */ |
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double shadcert = .75; /* shadow certainty */ |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
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< |
extern void |
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> |
void |
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ray_init( /* initialize ray-tracing calculation */ |
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char *otnm |
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) |
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if (ofun[OBJ_SPHERE].funp == o_default) |
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initotypes(); |
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/* initialize urand */ |
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< |
initurand(2048); |
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> |
if (rand_samp) { |
| 169 |
> |
srandom((long)time(0)); |
| 170 |
> |
initurand(0); |
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> |
} else { |
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> |
srandom(0L); |
| 173 |
> |
initurand(2048); |
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> |
} |
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/* read scene octree */ |
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readoct(octname = otnm, ~(IO_FILES|IO_INFO), &thescene, NULL); |
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nsceneobjs = nobjects; |
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/* ready to go... */ |
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} |
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| 185 |
< |
extern void |
| 185 |
> |
void |
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|
ray_trace( /* trace a primary ray */ |
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|
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 |
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|
| 195 |
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|
| 196 |
< |
extern void |
| 196 |
> |
void |
| 197 |
|
ray_done( /* free ray-tracing data */ |
| 198 |
|
int freall |
| 199 |
|
) |
| 215 |
|
} |
| 216 |
|
if (nobjects > 0) { |
| 217 |
|
sprintf(errmsg, "%ld objects left after call to ray_done()", |
| 218 |
< |
nobjects); |
| 218 |
> |
(long)nobjects); |
| 219 |
|
error(WARNING, errmsg); |
| 220 |
|
} |
| 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 |
|
) |