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" |
115 |
|
|
116 |
|
void (*trace)() = NULL; /* trace call */ |
117 |
|
|
118 |
– |
extern void ambnotify(); |
118 |
|
void (*addobjnotify[8])() = {ambnotify, NULL}; |
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 */ |
155 |
|
|
156 |
|
|
157 |
|
void |
158 |
< |
ray_init(otnm) /* initialize ray-tracing calculation */ |
159 |
< |
char *otnm; |
158 |
> |
ray_init( /* initialize ray-tracing calculation */ |
159 |
> |
char *otnm |
160 |
> |
) |
161 |
|
{ |
162 |
|
if (nobjects > 0) /* free old scene data */ |
163 |
|
ray_done(0); |
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; |
183 |
|
} |
184 |
|
|
185 |
|
void |
186 |
< |
ray_trace(r) /* trace a primary ray */ |
187 |
< |
RAY *r; |
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 |
|
void |
197 |
< |
ray_done(freall) /* free ray-tracing data */ |
198 |
< |
int freall; |
197 |
> |
ray_done( /* free ray-tracing data */ |
198 |
> |
int freall |
199 |
> |
) |
200 |
|
{ |
201 |
|
retainfonts = 1; |
202 |
|
ambdone(); |
214 |
|
initurand(0); |
215 |
|
} |
216 |
|
if (nobjects > 0) { |
217 |
< |
sprintf(errmsg, "%d objects left after call to ray_done()", |
218 |
< |
nobjects); |
217 |
> |
sprintf(errmsg, "%ld objects left after call to ray_done()", |
218 |
> |
(long)nobjects); |
219 |
|
error(WARNING, errmsg); |
220 |
|
} |
221 |
|
} |
222 |
|
|
223 |
|
|
224 |
|
void |
225 |
< |
ray_save(rp) /* save current parameter settings */ |
226 |
< |
RAYPARAMS *rp; |
225 |
> |
ray_save( /* save current parameter settings */ |
226 |
> |
RAYPARAMS *rp |
227 |
> |
) |
228 |
|
{ |
229 |
|
int i, ndx; |
230 |
|
|
273 |
|
|
274 |
|
|
275 |
|
void |
276 |
< |
ray_restore(rp) /* restore parameter settings */ |
277 |
< |
RAYPARAMS *rp; |
276 |
> |
ray_restore( /* restore parameter settings */ |
277 |
> |
RAYPARAMS *rp |
278 |
> |
) |
279 |
|
{ |
280 |
|
register int i; |
281 |
|
|
341 |
|
|
342 |
|
|
343 |
|
void |
344 |
< |
ray_defaults(rp) /* get default parameter values */ |
345 |
< |
RAYPARAMS *rp; |
344 |
> |
ray_defaults( /* get default parameter values */ |
345 |
> |
RAYPARAMS *rp |
346 |
> |
) |
347 |
|
{ |
348 |
|
int i; |
349 |
|
|
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; |