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 |
114 |
|
|
115 |
|
void (*trace)() = NULL; /* trace call */ |
116 |
|
|
118 |
– |
extern void ambnotify(); |
117 |
|
void (*addobjnotify[8])() = {ambnotify, NULL}; |
118 |
|
|
119 |
|
int do_irrad = 0; /* compute irradiance? */ |
120 |
|
|
121 |
+ |
int rand_samp = 0; /* pure Monte Carlo sampling? */ |
122 |
+ |
|
123 |
|
double dstrsrc = 0.0; /* square source distribution */ |
124 |
|
double shadthresh = .03; /* shadow threshold */ |
125 |
|
double shadcert = .75; /* shadow certainty */ |
153 |
|
int ambincl = -1; /* include == 1, exclude == 0 */ |
154 |
|
|
155 |
|
|
156 |
< |
void |
157 |
< |
ray_init(otnm) /* initialize ray-tracing calculation */ |
158 |
< |
char *otnm; |
156 |
> |
extern void |
157 |
> |
ray_init( /* initialize ray-tracing calculation */ |
158 |
> |
char *otnm |
159 |
> |
) |
160 |
|
{ |
161 |
|
if (nobjects > 0) /* free old scene data */ |
162 |
|
ray_done(0); |
175 |
|
/* ready to go... */ |
176 |
|
} |
177 |
|
|
178 |
< |
void |
179 |
< |
ray_trace(r) /* trace a primary ray */ |
180 |
< |
RAY *r; |
178 |
> |
extern void |
179 |
> |
ray_trace( /* trace a primary ray */ |
180 |
> |
RAY *r |
181 |
> |
) |
182 |
|
{ |
183 |
< |
rayorigin(r, NULL, PRIMARY, 1.0); |
184 |
< |
samplendx++; |
183 |
> |
rayorigin(r, PRIMARY, NULL, NULL); |
184 |
> |
samplendx = rand_samp ? random() : samplendx+1; |
185 |
|
rayvalue(r); /* assumes origin and direction are set */ |
186 |
|
} |
187 |
|
|
188 |
|
|
189 |
< |
void |
190 |
< |
ray_done(freall) /* free ray-tracing data */ |
191 |
< |
int freall; |
189 |
> |
extern void |
190 |
> |
ray_done( /* free ray-tracing data */ |
191 |
> |
int freall |
192 |
> |
) |
193 |
|
{ |
194 |
|
retainfonts = 1; |
195 |
|
ambdone(); |
207 |
|
initurand(0); |
208 |
|
} |
209 |
|
if (nobjects > 0) { |
210 |
< |
sprintf(errmsg, "%d objects left after call to ray_done()", |
210 |
> |
sprintf(errmsg, "%ld objects left after call to ray_done()", |
211 |
|
nobjects); |
212 |
|
error(WARNING, errmsg); |
213 |
|
} |
214 |
|
} |
215 |
|
|
216 |
|
|
217 |
< |
void |
218 |
< |
ray_save(rp) /* save current parameter settings */ |
219 |
< |
RAYPARAMS *rp; |
217 |
> |
extern void |
218 |
> |
ray_save( /* save current parameter settings */ |
219 |
> |
RAYPARAMS *rp |
220 |
> |
) |
221 |
|
{ |
222 |
|
int i, ndx; |
223 |
|
|
265 |
|
} |
266 |
|
|
267 |
|
|
268 |
< |
void |
269 |
< |
ray_restore(rp) /* restore parameter settings */ |
270 |
< |
RAYPARAMS *rp; |
268 |
> |
extern void |
269 |
> |
ray_restore( /* restore parameter settings */ |
270 |
> |
RAYPARAMS *rp |
271 |
> |
) |
272 |
|
{ |
273 |
|
register int i; |
274 |
|
|
333 |
|
} |
334 |
|
|
335 |
|
|
336 |
< |
void |
337 |
< |
ray_defaults(rp) /* get default parameter values */ |
338 |
< |
RAYPARAMS *rp; |
336 |
> |
extern void |
337 |
> |
ray_defaults( /* get default parameter values */ |
338 |
> |
RAYPARAMS *rp |
339 |
> |
) |
340 |
|
{ |
341 |
|
int i; |
342 |
|
|
364 |
|
memset(rp->ambfile, '\0', sizeof(rp->ambfile)); |
365 |
|
rp->ambvwt = 0; |
366 |
|
rp->ambres = 256; |
367 |
< |
rp->ambacc = 0.1; |
367 |
> |
rp->ambacc = 0.15; |
368 |
|
rp->ambdiv = 1024; |
369 |
|
rp->ambssamp = 512; |
370 |
|
rp->ambounce = 0; |