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" |
97 |
+ |
#include "bsdf.h" |
98 |
|
#include "ambient.h" |
99 |
|
#include "otypes.h" |
100 |
|
#include "random.h" |
120 |
|
|
121 |
|
int do_irrad = 0; /* compute irradiance? */ |
122 |
|
|
123 |
+ |
int rand_samp = 0; /* 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 */ |
155 |
|
int ambincl = -1; /* include == 1, exclude == 0 */ |
156 |
|
|
157 |
|
|
158 |
< |
extern void |
158 |
> |
void |
159 |
|
ray_init( /* initialize ray-tracing calculation */ |
160 |
|
char *otnm |
161 |
|
) |
166 |
|
if (ofun[OBJ_SPHERE].funp == o_default) |
167 |
|
initotypes(); |
168 |
|
/* initialize urand */ |
169 |
< |
initurand(2048); |
169 |
> |
if (rand_samp) { |
170 |
> |
srandom((long)time(0)); |
171 |
> |
initurand(0); |
172 |
> |
} else { |
173 |
> |
srandom(0L); |
174 |
> |
initurand(2048); |
175 |
> |
} |
176 |
|
/* read scene octree */ |
177 |
|
readoct(octname = otnm, ~(IO_FILES|IO_INFO), &thescene, NULL); |
178 |
|
nsceneobjs = nobjects; |
183 |
|
/* ready to go... */ |
184 |
|
} |
185 |
|
|
186 |
< |
extern void |
186 |
> |
void |
187 |
|
ray_trace( /* trace a primary ray */ |
188 |
|
RAY *r |
189 |
|
) |
190 |
|
{ |
191 |
< |
rayorigin(r, NULL, PRIMARY, 1.0); |
191 |
> |
rayorigin(r, PRIMARY, NULL, NULL); |
192 |
|
samplendx++; |
193 |
|
rayvalue(r); /* assumes origin and direction are set */ |
194 |
|
} |
195 |
|
|
196 |
|
|
197 |
< |
extern void |
197 |
> |
void |
198 |
|
ray_done( /* free ray-tracing data */ |
199 |
|
int freall |
200 |
|
) |
208 |
|
octdone(); |
209 |
|
thescene.cutree = EMPTY; |
210 |
|
octname = NULL; |
211 |
+ |
retainfonts = 0; |
212 |
|
if (freall) { |
203 |
– |
retainfonts = 0; |
213 |
|
freefont(NULL); |
214 |
|
freedata(NULL); |
215 |
+ |
SDfreeCache(NULL); |
216 |
|
initurand(0); |
217 |
|
} |
218 |
|
if (nobjects > 0) { |
219 |
|
sprintf(errmsg, "%ld objects left after call to ray_done()", |
220 |
< |
nobjects); |
220 |
> |
(long)nobjects); |
221 |
|
error(WARNING, errmsg); |
222 |
|
} |
223 |
|
} |
224 |
|
|
225 |
|
|
226 |
< |
extern void |
226 |
> |
void |
227 |
|
ray_save( /* save current parameter settings */ |
228 |
|
RAYPARAMS *rp |
229 |
|
) |
274 |
|
} |
275 |
|
|
276 |
|
|
277 |
< |
extern void |
277 |
> |
void |
278 |
|
ray_restore( /* restore parameter settings */ |
279 |
|
RAYPARAMS *rp |
280 |
|
) |
342 |
|
} |
343 |
|
|
344 |
|
|
345 |
< |
extern void |
345 |
> |
void |
346 |
|
ray_defaults( /* get default parameter values */ |
347 |
|
RAYPARAMS *rp |
348 |
|
) |
373 |
|
memset(rp->ambfile, '\0', sizeof(rp->ambfile)); |
374 |
|
rp->ambvwt = 0; |
375 |
|
rp->ambres = 256; |
376 |
< |
rp->ambacc = 0.1; |
376 |
> |
rp->ambacc = 0.15; |
377 |
|
rp->ambdiv = 1024; |
378 |
|
rp->ambssamp = 512; |
379 |
|
rp->ambounce = 0; |