1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rv3.c,v 2.41 2018/11/07 18:34:58 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* rv3.c - miscellaneous routines for rview. |
6 |
* |
7 |
* External symbols declared in rpaint.h |
8 |
*/ |
9 |
|
10 |
#include "copyright.h" |
11 |
|
12 |
#include <string.h> |
13 |
|
14 |
#include "ray.h" |
15 |
#include "rpaint.h" |
16 |
#include "otypes.h" |
17 |
#include "otspecial.h" |
18 |
#include "random.h" |
19 |
|
20 |
#ifndef WFLUSH |
21 |
#define WFLUSH 64 /* flush after this many primary rays */ |
22 |
#endif |
23 |
#ifndef WFLUSH1 |
24 |
#define WFLUSH1 512 /* or this many total rays */ |
25 |
#endif |
26 |
|
27 |
|
28 |
#ifdef SMLFLT |
29 |
#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
30 |
#else |
31 |
#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3) |
32 |
#endif |
33 |
|
34 |
extern int ray_pnprocs; |
35 |
|
36 |
static RNUMBER niflush; /* flushes since newimage() */ |
37 |
|
38 |
int |
39 |
getrect( /* get a box */ |
40 |
char *s, |
41 |
RECT *r |
42 |
) |
43 |
{ |
44 |
int x0, y0, x1, y1; |
45 |
|
46 |
if (*s && !strncmp(s, "all", strlen(s))) { |
47 |
r->l = r->d = 0; |
48 |
r->r = hresolu; |
49 |
r->u = vresolu; |
50 |
return(0); |
51 |
} |
52 |
if (sscanf(s, "%d %d %d %d", &x0, &y0, &x1, &y1) != 4) { |
53 |
if (dev->getcur == NULL) |
54 |
return(-1); |
55 |
(*dev->comout)("Pick first corner\n"); |
56 |
if ((*dev->getcur)(&x0, &y0) == ABORT) |
57 |
return(-1); |
58 |
(*dev->comout)("Pick second corner\n"); |
59 |
if ((*dev->getcur)(&x1, &y1) == ABORT) |
60 |
return(-1); |
61 |
} |
62 |
if (x0 < x1) { |
63 |
r->l = x0; |
64 |
r->r = x1; |
65 |
} else { |
66 |
r->l = x1; |
67 |
r->r = x0; |
68 |
} |
69 |
if (y0 < y1) { |
70 |
r->d = y0; |
71 |
r->u = y1; |
72 |
} else { |
73 |
r->d = y1; |
74 |
r->u = y0; |
75 |
} |
76 |
if (r->l < 0) r->l = 0; |
77 |
if (r->d < 0) r->d = 0; |
78 |
if (r->r > hresolu) r->r = hresolu; |
79 |
if (r->u > vresolu) r->u = vresolu; |
80 |
if (r->l > r->r) r->l = r->r; |
81 |
if (r->d > r->u) r->d = r->u; |
82 |
return(0); |
83 |
} |
84 |
|
85 |
|
86 |
int |
87 |
getinterest( /* get area of interest */ |
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char *s, |
89 |
int direc, |
90 |
FVECT vec, |
91 |
double *mp |
92 |
) |
93 |
{ |
94 |
int x, y; |
95 |
RAY thisray; |
96 |
int i; |
97 |
|
98 |
if (sscanf(s, "%lf", mp) != 1) |
99 |
*mp = 1.0; |
100 |
else if (*mp < -FTINY) /* negative zoom is reduction */ |
101 |
*mp = -1.0 / *mp; |
102 |
else if (*mp <= FTINY) { /* too small */ |
103 |
error(COMMAND, "illegal magnification"); |
104 |
return(-1); |
105 |
} |
106 |
if (!sscanvec(sskip(s), vec)) { |
107 |
if (dev->getcur == NULL) |
108 |
return(-1); |
109 |
(*dev->comout)("Pick view center\n"); |
110 |
if ((*dev->getcur)(&x, &y) == ABORT) |
111 |
return(-1); |
112 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
113 |
&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
114 |
error(COMMAND, "not on image"); |
115 |
return(-1); |
116 |
} |
117 |
if (!direc || ourview.type == VT_PAR) { |
118 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
119 |
while (localhit(&thisray, &thescene)) { |
120 |
OBJREC *m = findmaterial(thisray.ro); |
121 |
if (m != NULL && !istransp(m->otype) && |
122 |
!isBSDFproxy(m) && |
123 |
(thisray.clipset == NULL || |
124 |
!inset(thisray.clipset, |
125 |
thisray.ro->omod))) |
126 |
break; /* found something */ |
127 |
VCOPY(thisray.rorg, thisray.rop); |
128 |
rayclear(&thisray); /* skip invisible */ |
129 |
} |
130 |
if ((thisray.ro == NULL) | (thisray.ro == &Aftplane)) { |
131 |
error(COMMAND, "not a local object"); |
132 |
return(-1); |
133 |
} |
134 |
} |
135 |
if (direc) |
136 |
if (ourview.type == VT_PAR) |
137 |
for (i = 0; i < 3; i++) |
138 |
vec[i] = thisray.rop[i] - ourview.vp[i]; |
139 |
else |
140 |
VCOPY(vec, thisray.rdir); |
141 |
else |
142 |
VCOPY(vec, thisray.rop); |
143 |
} else if (direc) { |
144 |
for (i = 0; i < 3; i++) |
145 |
vec[i] -= ourview.vp[i]; |
146 |
if (normalize(vec) == 0.0) { |
147 |
error(COMMAND, "point at view origin"); |
148 |
return(-1); |
149 |
} |
150 |
} |
151 |
return(0); |
152 |
} |
153 |
|
154 |
|
155 |
COLORV * |
156 |
greyof( /* convert color to greyscale */ |
157 |
COLOR col |
158 |
) |
159 |
{ |
160 |
static COLOR gcol; |
161 |
double b; |
162 |
|
163 |
b = bright(col); |
164 |
setcolor(gcol, b, b, b); |
165 |
return(gcol); |
166 |
} |
167 |
|
168 |
static void |
169 |
recolor( /* recolor the given node */ |
170 |
PNODE *p |
171 |
) |
172 |
{ |
173 |
while (p->kid != NULL) { /* need to propogate down */ |
174 |
int mx = (p->xmin + p->xmax) >> 1; |
175 |
int my = (p->ymin + p->ymax) >> 1; |
176 |
int ki; |
177 |
if (p->x >= mx) |
178 |
ki = (p->y >= my) ? UR : DR; |
179 |
else |
180 |
ki = (p->y >= my) ? UL : DL; |
181 |
pcopy(p, p->kid+ki); |
182 |
p = p->kid + ki; |
183 |
} |
184 |
|
185 |
(*dev->paintr)(greyscale?greyof(p->v):p->v, |
186 |
p->xmin, p->ymin, p->xmax, p->ymax); |
187 |
} |
188 |
|
189 |
int |
190 |
paint( /* compute and paint a rectangle */ |
191 |
PNODE *p |
192 |
) |
193 |
{ |
194 |
static RAY thisray; |
195 |
double h, v; |
196 |
|
197 |
if ((p->xmax <= p->xmin) | (p->ymax <= p->ymin)) { /* empty */ |
198 |
p->x = p->xmin; |
199 |
p->y = p->ymin; |
200 |
setcolor(p->v, 0.0, 0.0, 0.0); |
201 |
return(0); |
202 |
} |
203 |
/* jitter ray direction */ |
204 |
p->x = h = p->xmin + (p->xmax-p->xmin)*frandom(); |
205 |
p->y = v = p->ymin + (p->ymax-p->ymin)*frandom(); |
206 |
|
207 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview, |
208 |
h/hresolu, v/vresolu)) < -FTINY) { |
209 |
setcolor(thisray.rcol, 0.0, 0.0, 0.0); |
210 |
} else if (!ray_pnprocs) { /* immediate mode */ |
211 |
ray_trace(&thisray); |
212 |
} else { /* queuing mode */ |
213 |
int rval; |
214 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
215 |
thisray.rno = (RNUMBER)p; |
216 |
rval = ray_pqueue(&thisray); |
217 |
if (!rval) |
218 |
return(0); |
219 |
if (rval < 0) |
220 |
return(-1); |
221 |
/* get node for returned ray */ |
222 |
p = (PNODE *)thisray.rno; |
223 |
} |
224 |
|
225 |
copycolor(p->v, thisray.rcol); |
226 |
scalecolor(p->v, exposure); |
227 |
|
228 |
recolor(p); /* paint it */ |
229 |
|
230 |
if (dev->flush != NULL) { /* shall we check for input? */ |
231 |
static RNUMBER lastflush = 0; |
232 |
RNUMBER counter = raynum; |
233 |
int flushintvl; |
234 |
if (!ray_pnprocs) { |
235 |
counter = nrays; |
236 |
flushintvl = WFLUSH1; |
237 |
} else if (ambounce == 0) |
238 |
flushintvl = ray_pnprocs*WFLUSH; |
239 |
else if (niflush < WFLUSH) |
240 |
flushintvl = ray_pnprocs*niflush/(ambounce*(ambounce>0)+1); |
241 |
else |
242 |
flushintvl = ray_pnprocs*WFLUSH/(ambounce*(ambounce>0)+1); |
243 |
if (lastflush > counter) |
244 |
lastflush = 0; /* counter wrapped */ |
245 |
|
246 |
if (counter - lastflush >= flushintvl) { |
247 |
lastflush = counter; |
248 |
(*dev->flush)(); |
249 |
niflush++; |
250 |
} |
251 |
} |
252 |
return(1); |
253 |
} |
254 |
|
255 |
|
256 |
int |
257 |
waitrays(void) /* finish up pending rays */ |
258 |
{ |
259 |
int nwaited = 0; |
260 |
int rval; |
261 |
RAY raydone; |
262 |
|
263 |
if (!ray_pnprocs) /* immediate mode? */ |
264 |
return(0); |
265 |
while ((rval = ray_presult(&raydone, 0)) > 0) { |
266 |
PNODE *p = (PNODE *)raydone.rno; |
267 |
copycolor(p->v, raydone.rcol); |
268 |
scalecolor(p->v, exposure); |
269 |
recolor(p); |
270 |
nwaited++; |
271 |
} |
272 |
if (rval < 0) |
273 |
return(-1); |
274 |
return(nwaited); |
275 |
} |
276 |
|
277 |
|
278 |
void |
279 |
newimage( /* start a new image */ |
280 |
char *s |
281 |
) |
282 |
{ |
283 |
int newnp = 0; |
284 |
/* # rendering procs arg? */ |
285 |
if (s != NULL) |
286 |
sscanf(s, "%d", &newnp); |
287 |
/* free old image */ |
288 |
freepkids(&ptrunk); |
289 |
/* compute resolution */ |
290 |
hresolu = dev->xsiz; |
291 |
vresolu = dev->ysiz; |
292 |
normaspect(viewaspect(&ourview), &dev->pixaspect, &hresolu, &vresolu); |
293 |
ptrunk.xmin = ptrunk.ymin = pframe.l = pframe.d = 0; |
294 |
ptrunk.xmax = pframe.r = hresolu; |
295 |
ptrunk.ymax = pframe.u = vresolu; |
296 |
pdepth = 0; |
297 |
/* clear device */ |
298 |
(*dev->clear)(hresolu, vresolu); |
299 |
|
300 |
if (newparam) { /* (re)start rendering procs */ |
301 |
if (ray_pnprocs) |
302 |
ray_pclose(0); /* should already be closed */ |
303 |
if (newnp > 0) |
304 |
nproc = newnp; |
305 |
if (nproc > 1) |
306 |
ray_popen(nproc); |
307 |
newparam = 0; |
308 |
} else if ((newnp > 0) & (newnp != nproc)) { |
309 |
if (newnp == 1) /* change # rendering procs */ |
310 |
ray_pclose(0); |
311 |
else if (newnp < ray_pnprocs) |
312 |
ray_pclose(ray_pnprocs - newnp); |
313 |
else |
314 |
ray_popen(newnp - ray_pnprocs); |
315 |
nproc = newnp; |
316 |
} |
317 |
niflush = 0; /* get first value */ |
318 |
paint(&ptrunk); |
319 |
} |
320 |
|
321 |
|
322 |
void |
323 |
redraw(void) /* redraw the image */ |
324 |
{ |
325 |
(*dev->clear)(hresolu, vresolu); |
326 |
(*dev->comout)("redrawing...\n"); |
327 |
repaint(0, 0, hresolu, vresolu); |
328 |
(*dev->comout)("\n"); |
329 |
} |
330 |
|
331 |
|
332 |
void |
333 |
repaint( /* repaint a region */ |
334 |
int xmin, |
335 |
int ymin, |
336 |
int xmax, |
337 |
int ymax |
338 |
) |
339 |
{ |
340 |
RECT reg; |
341 |
|
342 |
reg.l = xmin; reg.r = xmax; |
343 |
reg.d = ymin; reg.u = ymax; |
344 |
|
345 |
paintrect(&ptrunk, ®); |
346 |
} |
347 |
|
348 |
|
349 |
void |
350 |
paintrect( /* paint picture rectangle */ |
351 |
PNODE *p, |
352 |
RECT *r |
353 |
) |
354 |
{ |
355 |
int mx, my; |
356 |
|
357 |
if (p->xmax - p->xmin <= 0 || p->ymax - p->ymin <= 0) |
358 |
return; |
359 |
|
360 |
if (p->kid == NULL) { |
361 |
(*dev->paintr)(greyscale?greyof(p->v):p->v, |
362 |
p->xmin, p->ymin, p->xmax, p->ymax); /* do this */ |
363 |
return; |
364 |
} |
365 |
mx = (p->xmin + p->xmax) >> 1; /* do kids */ |
366 |
my = (p->ymin + p->ymax) >> 1; |
367 |
if (mx > r->l) { |
368 |
if (my > r->d) |
369 |
paintrect(p->kid+DL, r); |
370 |
if (my < r->u) |
371 |
paintrect(p->kid+UL, r); |
372 |
} |
373 |
if (mx < r->r) { |
374 |
if (my > r->d) |
375 |
paintrect(p->kid+DR, r); |
376 |
if (my < r->u) |
377 |
paintrect(p->kid+UR, r); |
378 |
} |
379 |
} |
380 |
|
381 |
|
382 |
PNODE * |
383 |
findrect( /* find a rectangle */ |
384 |
int x, |
385 |
int y, |
386 |
PNODE *p, |
387 |
int pd |
388 |
) |
389 |
{ |
390 |
int mx, my; |
391 |
|
392 |
while (p->kid != NULL && pd--) { |
393 |
|
394 |
mx = (p->xmin + p->xmax) >> 1; |
395 |
my = (p->ymin + p->ymax) >> 1; |
396 |
|
397 |
if (x < mx) { |
398 |
if (y < my) { |
399 |
p = p->kid+DL; |
400 |
} else { |
401 |
p = p->kid+UL; |
402 |
} |
403 |
} else { |
404 |
if (y < my) { |
405 |
p = p->kid+DR; |
406 |
} else { |
407 |
p = p->kid+UR; |
408 |
} |
409 |
} |
410 |
} |
411 |
return(p); |
412 |
} |
413 |
|
414 |
|
415 |
void |
416 |
compavg( /* recompute averages */ |
417 |
PNODE *p |
418 |
) |
419 |
{ |
420 |
int i, navg; |
421 |
|
422 |
if (p->kid == NULL) |
423 |
return; |
424 |
|
425 |
setcolor(p->v, .0, .0, .0); |
426 |
navg = 0; |
427 |
for (i = 0; i < 4; i++) { |
428 |
if (p->kid[i].xmin >= p->kid[i].xmax) continue; |
429 |
if (p->kid[i].ymin >= p->kid[i].ymax) continue; |
430 |
compavg(p->kid+i); |
431 |
addcolor(p->v, p->kid[i].v); |
432 |
navg++; |
433 |
} |
434 |
if (navg > 1) |
435 |
scalecolor(p->v, 1./navg); |
436 |
} |
437 |
|
438 |
|
439 |
void |
440 |
scalepict( /* scale picture values */ |
441 |
PNODE *p, |
442 |
double sf |
443 |
) |
444 |
{ |
445 |
scalecolor(p->v, sf); /* do this node */ |
446 |
|
447 |
if (p->kid == NULL) |
448 |
return; |
449 |
/* do children */ |
450 |
scalepict(p->kid+DL, sf); |
451 |
scalepict(p->kid+DR, sf); |
452 |
scalepict(p->kid+UL, sf); |
453 |
scalepict(p->kid+UR, sf); |
454 |
} |
455 |
|
456 |
|
457 |
void |
458 |
getpictcolrs( /* get scanline from picture */ |
459 |
int yoff, |
460 |
COLR *scan, |
461 |
PNODE *p, |
462 |
int xsiz, |
463 |
int ysiz |
464 |
) |
465 |
{ |
466 |
int mx; |
467 |
int my; |
468 |
|
469 |
if (p->kid == NULL) { /* do this node */ |
470 |
setcolr(scan[0], colval(p->v,RED), |
471 |
colval(p->v,GRN), |
472 |
colval(p->v,BLU)); |
473 |
for (mx = 1; mx < xsiz; mx++) |
474 |
copycolr(scan[mx], scan[0]); |
475 |
return; |
476 |
} |
477 |
/* do kids */ |
478 |
mx = xsiz >> 1; |
479 |
my = ysiz >> 1; |
480 |
if (yoff < my) { |
481 |
getpictcolrs(yoff, scan, p->kid+DL, mx, my); |
482 |
getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my); |
483 |
} else { |
484 |
getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my); |
485 |
getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my); |
486 |
} |
487 |
} |
488 |
|
489 |
|
490 |
void |
491 |
freepkids( /* free pnode's children */ |
492 |
PNODE *p |
493 |
) |
494 |
{ |
495 |
if (p->kid == NULL) |
496 |
return; |
497 |
freepkids(p->kid+DL); |
498 |
freepkids(p->kid+DR); |
499 |
freepkids(p->kid+UL); |
500 |
freepkids(p->kid+UR); |
501 |
free((void *)p->kid); |
502 |
p->kid = NULL; |
503 |
} |
504 |
|
505 |
|
506 |
void |
507 |
newview( /* change viewing parameters */ |
508 |
VIEW *vp |
509 |
) |
510 |
{ |
511 |
char *err; |
512 |
|
513 |
if ((err = setview(vp)) != NULL) { |
514 |
sprintf(errmsg, "view not set - %s", err); |
515 |
error(COMMAND, errmsg); |
516 |
} else if (memcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) { |
517 |
oldview = ourview; |
518 |
ourview = *vp; |
519 |
newimage(NULL); |
520 |
} |
521 |
} |
522 |
|
523 |
|
524 |
void |
525 |
moveview( /* move viewpoint */ |
526 |
double angle, |
527 |
double elev, |
528 |
double mag, |
529 |
FVECT vc |
530 |
) |
531 |
{ |
532 |
double d; |
533 |
VIEW nv = ourview; |
534 |
int i; |
535 |
|
536 |
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
537 |
if (elev != 0.0) |
538 |
geodesic(nv.vdir, nv.vdir, nv.vup, elev*(-PI/180.), GEOD_RAD); |
539 |
|
540 |
if (nv.type == VT_PAR) { |
541 |
nv.horiz /= mag; |
542 |
nv.vert /= mag; |
543 |
d = 0.0; /* don't move closer */ |
544 |
for (i = 0; i < 3; i++) |
545 |
d += (vc[i] - ourview.vp[i])*ourview.vdir[i]; |
546 |
} else { |
547 |
d = sqrt(dist2(ourview.vp, vc)) / mag; |
548 |
if (nv.vfore > FTINY) { |
549 |
nv.vfore += d - d*mag; |
550 |
if (nv.vfore < 0.0) nv.vfore = 0.0; |
551 |
} |
552 |
if (nv.vaft > FTINY) { |
553 |
nv.vaft += d - d*mag; |
554 |
if (nv.vaft <= nv.vfore) nv.vaft = 0.0; |
555 |
} |
556 |
nv.vdist /= mag; |
557 |
} |
558 |
for (i = 0; i < 3; i++) |
559 |
nv.vp[i] = vc[i] - d*nv.vdir[i]; |
560 |
newview(&nv); |
561 |
} |
562 |
|
563 |
|
564 |
void |
565 |
pcopy( /* copy paint node p1 into p2 */ |
566 |
PNODE *p1, |
567 |
PNODE *p2 |
568 |
) |
569 |
{ |
570 |
copycolor(p2->v, p1->v); |
571 |
p2->x = p1->x; |
572 |
p2->y = p1->y; |
573 |
} |
574 |
|
575 |
|
576 |
void |
577 |
zoomview( /* zoom in or out */ |
578 |
VIEW *vp, |
579 |
double zf |
580 |
) |
581 |
{ |
582 |
switch (vp->type) { |
583 |
case VT_PAR: /* parallel view */ |
584 |
vp->horiz /= zf; |
585 |
vp->vert /= zf; |
586 |
return; |
587 |
case VT_ANG: /* angular fisheye */ |
588 |
vp->horiz /= zf; |
589 |
if (vp->horiz > 360.) |
590 |
vp->horiz = 360.; |
591 |
vp->vert /= zf; |
592 |
if (vp->vert > 360.) |
593 |
vp->vert = 360.; |
594 |
return; |
595 |
case VT_PLS: /* planisphere fisheye */ |
596 |
vp->horiz = sin((PI/180./2.)*vp->horiz) / |
597 |
(1.0 + cos((PI/180./2.)*vp->horiz)) / zf; |
598 |
vp->horiz *= vp->horiz; |
599 |
vp->horiz = (2.*180./PI)*acos((1. - vp->horiz) / |
600 |
(1. + vp->horiz)); |
601 |
vp->vert = sin((PI/180./2.)*vp->vert) / |
602 |
(1.0 + cos((PI/180./2.)*vp->vert)) / zf; |
603 |
vp->vert *= vp->vert; |
604 |
vp->vert = (2.*180./PI)*acos((1. - vp->vert) / |
605 |
(1. + vp->vert)); |
606 |
return; |
607 |
case VT_CYL: /* cylindrical panorama */ |
608 |
vp->horiz /= zf; |
609 |
if (vp->horiz > 360.) |
610 |
vp->horiz = 360.; |
611 |
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / (PI/180./2.); |
612 |
return; |
613 |
case VT_PER: /* perspective view */ |
614 |
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |
615 |
(PI/180./2.); |
616 |
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / |
617 |
(PI/180./2.); |
618 |
return; |
619 |
case VT_HEM: /* hemispherical fisheye */ |
620 |
vp->horiz = sin(vp->horiz*(PI/180./2.))/zf; |
621 |
if (vp->horiz >= 1.0-FTINY) |
622 |
vp->horiz = 180.; |
623 |
else |
624 |
vp->horiz = asin(vp->horiz) / (PI/180./2.); |
625 |
vp->vert = sin(vp->vert*(PI/180./2.))/zf; |
626 |
if (vp->vert >= 1.0-FTINY) |
627 |
vp->vert = 180.; |
628 |
else |
629 |
vp->vert = asin(vp->vert) / (PI/180./2.); |
630 |
return; |
631 |
} |
632 |
} |