11 |
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#include "face.h" |
12 |
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#include "cone.h" |
13 |
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#include "random.h" |
14 |
– |
#include "selcall.h" |
14 |
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|
15 |
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|
16 |
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static void mkaxes(FVECT u, FVECT v, FVECT n); |
18 |
|
static void flatdir(FVECT dv, double alt, double azi); |
19 |
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|
20 |
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|
21 |
+ |
static COLORV * distarr = NULL; /* distribution array */ |
22 |
+ |
static int distsiz = 0; |
23 |
+ |
|
24 |
+ |
|
25 |
|
static void |
26 |
< |
rayclean( /* finish all pending rays */ |
27 |
< |
struct rtproc *rt0 |
26 |
> |
newdist( /* allocate & clear distribution array */ |
27 |
> |
int siz |
28 |
|
) |
29 |
|
{ |
30 |
< |
rayflush(rt0, 1); |
31 |
< |
while (raywait(rt0) != NULL) |
30 |
> |
if (siz == 0) { |
31 |
> |
if (distsiz > 0) |
32 |
> |
free((void *)distarr); |
33 |
> |
distarr = NULL; |
34 |
> |
distsiz = 0; |
35 |
> |
return; |
36 |
> |
} |
37 |
> |
if (distsiz < siz) { |
38 |
> |
free((void *)distarr); |
39 |
> |
distarr = (COLORV *)malloc(sizeof(COLORV)*3*siz); |
40 |
> |
if (distarr == NULL) |
41 |
> |
error(SYSTEM, "Out of memory in distalloc"); |
42 |
> |
distsiz = siz; |
43 |
> |
} |
44 |
> |
memset(distarr, '\0', sizeof(COLORV)*3*siz); |
45 |
> |
} |
46 |
> |
|
47 |
> |
|
48 |
> |
static int |
49 |
> |
process_ray(RAY *r, int rv) |
50 |
> |
{ |
51 |
> |
COLORV *colp; |
52 |
> |
|
53 |
> |
if (rv == 0) |
54 |
> |
return(0); |
55 |
> |
if (rv < 0) |
56 |
> |
error(USER, "Ray tracing process died"); |
57 |
> |
if (r->rno >= distsiz) |
58 |
> |
error(INTERNAL, "Bad returned index in process_ray"); |
59 |
> |
colp = &distarr[r->rno * 3]; |
60 |
> |
addcolor(colp, r->rcol); |
61 |
> |
return(1); |
62 |
> |
} |
63 |
> |
|
64 |
> |
|
65 |
> |
static void |
66 |
> |
raysamp( /* queue a ray sample */ |
67 |
> |
int ndx, |
68 |
> |
FVECT org, |
69 |
> |
FVECT dir |
70 |
> |
) |
71 |
> |
{ |
72 |
> |
RAY myRay; |
73 |
> |
int rv; |
74 |
> |
|
75 |
> |
if ((ndx < 0) | (ndx >= distsiz)) |
76 |
> |
error(INTERNAL, "Bad index in raysamp"); |
77 |
> |
VCOPY(myRay.rorg, org); |
78 |
> |
VCOPY(myRay.rdir, dir); |
79 |
> |
myRay.rmax = .0; |
80 |
> |
rayorigin(&myRay, PRIMARY, NULL, NULL); |
81 |
> |
myRay.rno = ndx; |
82 |
> |
/* queue ray, check result */ |
83 |
> |
process_ray(&myRay, ray_pqueue(&myRay)); |
84 |
> |
} |
85 |
> |
|
86 |
> |
|
87 |
> |
static void |
88 |
> |
rayclean() /* finish all pending rays */ |
89 |
> |
{ |
90 |
> |
RAY myRay; |
91 |
> |
|
92 |
> |
while (process_ray(&myRay, ray_presult(&myRay, 0))) |
93 |
|
; |
94 |
|
} |
95 |
|
|
96 |
|
|
97 |
|
int /* XXX type conflict with otypes.h */ |
98 |
< |
o_default( /* default illum action */ |
98 |
> |
my_default( /* default illum action */ |
99 |
|
OBJREC *ob, |
100 |
|
struct illum_args *il, |
37 |
– |
struct rtproc *rt0, |
101 |
|
char *nm |
102 |
|
) |
103 |
|
{ |
110 |
|
|
111 |
|
|
112 |
|
int |
113 |
< |
o_face( /* make an illum face */ |
113 |
> |
my_face( /* make an illum face */ |
114 |
|
OBJREC *ob, |
115 |
|
struct illum_args *il, |
53 |
– |
struct rtproc *rt0, |
116 |
|
char *nm |
117 |
|
) |
118 |
|
{ |
119 |
|
#define MAXMISS (5*n*il->nsamps) |
120 |
|
int dim[3]; |
121 |
|
int n, nalt, nazi, h; |
60 |
– |
float *distarr; |
122 |
|
double sp[2], r1, r2; |
123 |
|
FVECT dn, org, dir; |
124 |
|
FVECT u, v; |
130 |
|
fa = getface(ob); |
131 |
|
if (fa->area == 0.0) { |
132 |
|
freeface(ob); |
133 |
< |
return(o_default(ob, il, rt0, nm)); |
133 |
> |
return(o_default(ob, il, nm)); |
134 |
|
} |
135 |
|
/* set up sampling */ |
136 |
|
if (il->sampdens <= 0) |
141 |
|
nazi = PI*nalt + .5; |
142 |
|
} |
143 |
|
n = nalt*nazi; |
144 |
< |
distarr = (float *)calloc(n, 3*sizeof(float)); |
84 |
< |
if (distarr == NULL) |
85 |
< |
error(SYSTEM, "out of memory in o_face"); |
144 |
> |
newdist(n); |
145 |
|
/* take first edge longer than sqrt(area) */ |
146 |
|
for (j = fa->nv-1, i = 0; i < fa->nv; j = i++) { |
147 |
|
u[0] = VERTEX(fa,i)[0] - VERTEX(fa,j)[0]; |
192 |
|
} while (!inface(org, fa) && nmisses++ < MAXMISS); |
193 |
|
if (nmisses > MAXMISS) { |
194 |
|
objerror(ob, WARNING, "bad aspect"); |
195 |
< |
rayclean(rt0); |
195 |
> |
rayclean(); |
196 |
|
freeface(ob); |
197 |
|
free((void *)distarr); |
198 |
< |
return(o_default(ob, il, rt0, nm)); |
198 |
> |
return(o_default(ob, il, nm)); |
199 |
|
} |
200 |
|
for (j = 0; j < 3; j++) |
201 |
|
org[j] += .001*fa->norm[j]; |
202 |
|
/* send sample */ |
203 |
< |
raysamp(distarr+3*(dim[1]*nazi+dim[2]), org, dir, rt0); |
203 |
> |
raysamp(dim[1]*nazi+dim[2], org, dir); |
204 |
|
} |
205 |
< |
rayclean(rt0); |
205 |
> |
rayclean(); |
206 |
|
/* write out the face and its distribution */ |
207 |
|
if (average(il, distarr, nalt*nazi)) { |
208 |
|
if (il->sampdens > 0) |
212 |
|
printobj(il->altmat, ob); |
213 |
|
/* clean up */ |
214 |
|
freeface(ob); |
156 |
– |
free((void *)distarr); |
215 |
|
return(0); |
216 |
|
#undef MAXMISS |
217 |
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} |
218 |
|
|
219 |
|
|
220 |
|
int |
221 |
< |
o_sphere( /* make an illum sphere */ |
221 |
> |
my_sphere( /* make an illum sphere */ |
222 |
|
register OBJREC *ob, |
223 |
|
struct illum_args *il, |
166 |
– |
struct rtproc *rt0, |
224 |
|
char *nm |
225 |
|
) |
226 |
|
{ |
227 |
|
int dim[3]; |
228 |
|
int n, nalt, nazi; |
172 |
– |
float *distarr; |
229 |
|
double sp[4], r1, r2, r3; |
230 |
|
FVECT org, dir; |
231 |
|
FVECT u, v; |
242 |
|
nazi = PI/2.*nalt + .5; |
243 |
|
} |
244 |
|
n = nalt*nazi; |
245 |
< |
distarr = (float *)calloc(n, 3*sizeof(float)); |
190 |
< |
if (distarr == NULL) |
191 |
< |
error(SYSTEM, "out of memory in o_sphere"); |
245 |
> |
newdist(n); |
246 |
|
dim[0] = random(); |
247 |
|
/* sample sphere */ |
248 |
|
for (dim[1] = 0; dim[1] < nalt; dim[1]++) |
267 |
|
dir[j] = -dir[j]; |
268 |
|
} |
269 |
|
/* send sample */ |
270 |
< |
raysamp(distarr+3*(dim[1]*nazi+dim[2]), org, dir, rt0); |
270 |
> |
raysamp(dim[1]*nazi+dim[2], org, dir); |
271 |
|
} |
272 |
< |
rayclean(rt0); |
272 |
> |
rayclean(); |
273 |
|
/* write out the sphere and its distribution */ |
274 |
|
if (average(il, distarr, nalt*nazi)) { |
275 |
|
if (il->sampdens > 0) |
280 |
|
} else |
281 |
|
printobj(il->altmat, ob); |
282 |
|
/* clean up */ |
229 |
– |
free((void *)distarr); |
283 |
|
return(1); |
284 |
|
} |
285 |
|
|
286 |
|
|
287 |
|
int |
288 |
< |
o_ring( /* make an illum ring */ |
288 |
> |
my_ring( /* make an illum ring */ |
289 |
|
OBJREC *ob, |
290 |
|
struct illum_args *il, |
238 |
– |
struct rtproc *rt0, |
291 |
|
char *nm |
292 |
|
) |
293 |
|
{ |
294 |
|
int dim[3]; |
295 |
|
int n, nalt, nazi; |
244 |
– |
float *distarr; |
296 |
|
double sp[4], r1, r2, r3; |
297 |
|
FVECT dn, org, dir; |
298 |
|
FVECT u, v; |
309 |
|
nazi = PI*nalt + .5; |
310 |
|
} |
311 |
|
n = nalt*nazi; |
312 |
< |
distarr = (float *)calloc(n, 3*sizeof(float)); |
262 |
< |
if (distarr == NULL) |
263 |
< |
error(SYSTEM, "out of memory in o_ring"); |
312 |
> |
newdist(n); |
313 |
|
mkaxes(u, v, co->ad); |
314 |
|
dim[0] = random(); |
315 |
|
/* sample disk */ |
335 |
|
.001*co->ad[j]; |
336 |
|
|
337 |
|
/* send sample */ |
338 |
< |
raysamp(distarr+3*(dim[1]*nazi+dim[2]), org, dir, rt0); |
338 |
> |
raysamp(dim[1]*nazi+dim[2], org, dir); |
339 |
|
} |
340 |
< |
rayclean(rt0); |
340 |
> |
rayclean(); |
341 |
|
/* write out the ring and its distribution */ |
342 |
|
if (average(il, distarr, nalt*nazi)) { |
343 |
|
if (il->sampdens > 0) |
347 |
|
printobj(il->altmat, ob); |
348 |
|
/* clean up */ |
349 |
|
freecone(ob); |
301 |
– |
free((void *)distarr); |
350 |
|
return(1); |
303 |
– |
} |
304 |
– |
|
305 |
– |
|
306 |
– |
void |
307 |
– |
raysamp( /* queue a ray sample */ |
308 |
– |
float res[3], |
309 |
– |
FVECT org, |
310 |
– |
FVECT dir, |
311 |
– |
struct rtproc *rt0 |
312 |
– |
) |
313 |
– |
{ |
314 |
– |
register struct rtproc *rt; |
315 |
– |
register float *fp; |
316 |
– |
|
317 |
– |
for (rt = rt0; rt != NULL; rt = rt->next) |
318 |
– |
if (rt->nrays < rt->bsiz && rt->dest[rt->nrays] == NULL) |
319 |
– |
break; |
320 |
– |
if (rt == NULL) /* need to free up buffer? */ |
321 |
– |
rt = raywait(rt0); |
322 |
– |
if (rt == NULL) |
323 |
– |
error(SYSTEM, "raywait() returned NULL in raysamp()"); |
324 |
– |
fp = rt->buf + 6*rt->nrays; |
325 |
– |
*fp++ = org[0]; *fp++ = org[1]; *fp++ = org[2]; |
326 |
– |
*fp++ = dir[0]; *fp++ = dir[1]; *fp = dir[2]; |
327 |
– |
rt->dest[rt->nrays++] = res; |
328 |
– |
if (rt->nrays == rt->bsiz) |
329 |
– |
rayflush(rt, 0); |
330 |
– |
} |
331 |
– |
|
332 |
– |
|
333 |
– |
void |
334 |
– |
rayflush( /* flush queued rays to rtrace */ |
335 |
– |
register struct rtproc *rt, |
336 |
– |
int doall |
337 |
– |
) |
338 |
– |
{ |
339 |
– |
int nw; |
340 |
– |
|
341 |
– |
do { |
342 |
– |
if (rt->nrays <= 0) |
343 |
– |
continue; |
344 |
– |
memset(rt->buf+6*rt->nrays, 0, 6*sizeof(float)); |
345 |
– |
nw = 6*sizeof(float)*(rt->nrays+1); |
346 |
– |
errno = 0; |
347 |
– |
if (writebuf(rt->pd.w, (char *)rt->buf, nw) < nw) |
348 |
– |
error(SYSTEM, "error writing to rtrace process"); |
349 |
– |
rt->nrays = 0; /* flag buffer as flushed */ |
350 |
– |
} while (doall && (rt = rt->next) != NULL); |
351 |
– |
} |
352 |
– |
|
353 |
– |
|
354 |
– |
struct rtproc * |
355 |
– |
raywait( /* retrieve rtrace results */ |
356 |
– |
struct rtproc *rt0 |
357 |
– |
) |
358 |
– |
{ |
359 |
– |
fd_set readset, errset; |
360 |
– |
int nr; |
361 |
– |
struct rtproc *rtfree; |
362 |
– |
register struct rtproc *rt; |
363 |
– |
register int n; |
364 |
– |
/* prepare select call */ |
365 |
– |
FD_ZERO(&readset); FD_ZERO(&errset); n = 0; |
366 |
– |
nr = 0; |
367 |
– |
for (rt = rt0; rt != NULL; rt = rt->next) { |
368 |
– |
if (rt->nrays == 0 && rt->dest[0] != NULL) { |
369 |
– |
FD_SET(rt->pd.r, &readset); |
370 |
– |
++nr; |
371 |
– |
} |
372 |
– |
FD_SET(rt->pd.r, &errset); |
373 |
– |
if (rt->pd.r >= n) |
374 |
– |
n = rt->pd.r + 1; |
375 |
– |
} |
376 |
– |
if (!nr) /* no rays pending */ |
377 |
– |
return(NULL); |
378 |
– |
if (nr > 1) { /* call select for multiple processes */ |
379 |
– |
errno = 0; |
380 |
– |
if (select(n, &readset, NULL, &errset, NULL) < 0) |
381 |
– |
error(SYSTEM, "select call error in raywait()"); |
382 |
– |
} else |
383 |
– |
FD_ZERO(&errset); |
384 |
– |
rtfree = NULL; /* read from ready process(es) */ |
385 |
– |
for (rt = rt0; rt != NULL; rt = rt->next) { |
386 |
– |
if (!FD_ISSET(rt->pd.r, &readset) && |
387 |
– |
!FD_ISSET(rt->pd.r, &errset)) |
388 |
– |
continue; |
389 |
– |
for (n = 0; n < rt->bsiz && rt->dest[n] != NULL; n++) |
390 |
– |
; |
391 |
– |
nr = 3*sizeof(float)*(n+1); |
392 |
– |
if (readbuf(rt->pd.r, (char *)rt->buf, nr) < nr) |
393 |
– |
error(USER, "rtrace process died"); |
394 |
– |
while (n-- > 0) { |
395 |
– |
rt->dest[n][0] += rt->buf[3*n]; |
396 |
– |
rt->dest[n][1] += rt->buf[3*n+1]; |
397 |
– |
rt->dest[n][2] += rt->buf[3*n+2]; |
398 |
– |
rt->dest[n] = NULL; |
399 |
– |
} |
400 |
– |
rtfree = rt; |
401 |
– |
} |
402 |
– |
return(rtfree); |
351 |
|
} |
352 |
|
|
353 |
|
|