1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rv3.c,v 2.28 2008/09/05 21:34:09 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 "random.h" |
17 |
|
18 |
#ifndef WFLUSH |
19 |
#define WFLUSH 64 /* flush after this many primary rays */ |
20 |
#endif |
21 |
#ifndef WFLUSH1 |
22 |
#define WFLUSH1 512 /* or this many total rays */ |
23 |
#endif |
24 |
|
25 |
|
26 |
#ifdef SMLFLT |
27 |
#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
28 |
#else |
29 |
#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3) |
30 |
#endif |
31 |
|
32 |
static unsigned long niflush; /* flushes since newimage() */ |
33 |
|
34 |
int |
35 |
getrect( /* get a box */ |
36 |
char *s, |
37 |
RECT *r |
38 |
) |
39 |
{ |
40 |
int x0, y0, x1, y1; |
41 |
|
42 |
if (*s && !strncmp(s, "all", strlen(s))) { |
43 |
r->l = r->d = 0; |
44 |
r->r = hresolu; |
45 |
r->u = vresolu; |
46 |
return(0); |
47 |
} |
48 |
if (sscanf(s, "%d %d %d %d", &x0, &y0, &x1, &y1) != 4) { |
49 |
if (dev->getcur == NULL) |
50 |
return(-1); |
51 |
(*dev->comout)("Pick first corner\n"); |
52 |
if ((*dev->getcur)(&x0, &y0) == ABORT) |
53 |
return(-1); |
54 |
(*dev->comout)("Pick second corner\n"); |
55 |
if ((*dev->getcur)(&x1, &y1) == ABORT) |
56 |
return(-1); |
57 |
} |
58 |
if (x0 < x1) { |
59 |
r->l = x0; |
60 |
r->r = x1; |
61 |
} else { |
62 |
r->l = x1; |
63 |
r->r = x0; |
64 |
} |
65 |
if (y0 < y1) { |
66 |
r->d = y0; |
67 |
r->u = y1; |
68 |
} else { |
69 |
r->d = y1; |
70 |
r->u = y0; |
71 |
} |
72 |
if (r->l < 0) r->l = 0; |
73 |
if (r->d < 0) r->d = 0; |
74 |
if (r->r > hresolu) r->r = hresolu; |
75 |
if (r->u > vresolu) r->u = vresolu; |
76 |
if (r->l > r->r) r->l = r->r; |
77 |
if (r->d > r->u) r->d = r->u; |
78 |
return(0); |
79 |
} |
80 |
|
81 |
|
82 |
int |
83 |
getinterest( /* get area of interest */ |
84 |
char *s, |
85 |
int direc, |
86 |
FVECT vec, |
87 |
double *mp |
88 |
) |
89 |
{ |
90 |
int x, y; |
91 |
RAY thisray; |
92 |
int i; |
93 |
|
94 |
if (sscanf(s, "%lf", mp) != 1) |
95 |
*mp = 1.0; |
96 |
else if (*mp < -FTINY) /* negative zoom is reduction */ |
97 |
*mp = -1.0 / *mp; |
98 |
else if (*mp <= FTINY) { /* too small */ |
99 |
error(COMMAND, "illegal magnification"); |
100 |
return(-1); |
101 |
} |
102 |
if (!sscanvec(sskip(s), vec)) { |
103 |
if (dev->getcur == NULL) |
104 |
return(-1); |
105 |
(*dev->comout)("Pick view center\n"); |
106 |
if ((*dev->getcur)(&x, &y) == ABORT) |
107 |
return(-1); |
108 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
109 |
&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
110 |
error(COMMAND, "not on image"); |
111 |
return(-1); |
112 |
} |
113 |
if (!direc || ourview.type == VT_PAR) { |
114 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
115 |
if (!localhit(&thisray, &thescene)) { |
116 |
error(COMMAND, "not a local object"); |
117 |
return(-1); |
118 |
} |
119 |
} |
120 |
if (direc) |
121 |
if (ourview.type == VT_PAR) |
122 |
for (i = 0; i < 3; i++) |
123 |
vec[i] = thisray.rop[i] - ourview.vp[i]; |
124 |
else |
125 |
VCOPY(vec, thisray.rdir); |
126 |
else |
127 |
VCOPY(vec, thisray.rop); |
128 |
} else if (direc) { |
129 |
for (i = 0; i < 3; i++) |
130 |
vec[i] -= ourview.vp[i]; |
131 |
if (normalize(vec) == 0.0) { |
132 |
error(COMMAND, "point at view origin"); |
133 |
return(-1); |
134 |
} |
135 |
} |
136 |
return(0); |
137 |
} |
138 |
|
139 |
|
140 |
float * /* keep consistent with COLOR typedef */ |
141 |
greyof( /* convert color to greyscale */ |
142 |
COLOR col |
143 |
) |
144 |
{ |
145 |
static COLOR gcol; |
146 |
double b; |
147 |
|
148 |
b = bright(col); |
149 |
setcolor(gcol, b, b, b); |
150 |
return(gcol); |
151 |
} |
152 |
|
153 |
static void |
154 |
recolor( /* recolor the given node */ |
155 |
PNODE *p |
156 |
) |
157 |
{ |
158 |
while (p->kid != NULL) { /* need to propogate down */ |
159 |
int mx = (p->xmin + p->xmax) >> 1; |
160 |
int my = (p->ymin + p->ymax) >> 1; |
161 |
int ki; |
162 |
if (p->x >= mx) |
163 |
ki = (p->y >= my) ? UR : DR; |
164 |
else |
165 |
ki = (p->y >= my) ? UL : DL; |
166 |
pcopy(p, p->kid+ki); |
167 |
p = p->kid + ki; |
168 |
} |
169 |
|
170 |
(*dev->paintr)(greyscale?greyof(p->v):p->v, |
171 |
p->xmin, p->ymin, p->xmax, p->ymax); |
172 |
} |
173 |
|
174 |
int |
175 |
paint( /* compute and paint a rectangle */ |
176 |
PNODE *p |
177 |
) |
178 |
{ |
179 |
static RAY thisray; |
180 |
double h, v; |
181 |
|
182 |
if ((p->xmax <= p->xmin) | (p->ymax <= p->ymin)) { /* empty */ |
183 |
p->x = p->xmin; |
184 |
p->y = p->ymin; |
185 |
setcolor(p->v, 0.0, 0.0, 0.0); |
186 |
return(0); |
187 |
} |
188 |
/* jitter ray direction */ |
189 |
p->x = h = p->xmin + (p->xmax-p->xmin)*frandom(); |
190 |
p->y = v = p->ymin + (p->ymax-p->ymin)*frandom(); |
191 |
|
192 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview, |
193 |
h/hresolu, v/vresolu)) < -FTINY) { |
194 |
setcolor(thisray.rcol, 0.0, 0.0, 0.0); |
195 |
} else if (nproc == 1) { /* immediate mode */ |
196 |
ray_trace(&thisray); |
197 |
} else { /* queuing mode */ |
198 |
int rval; |
199 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
200 |
thisray.rno = (unsigned long)p; |
201 |
rval = ray_pqueue(&thisray); |
202 |
if (!rval) |
203 |
return(0); |
204 |
if (rval < 0) |
205 |
return(-1); |
206 |
p = (PNODE *)thisray.rno; |
207 |
} |
208 |
|
209 |
copycolor(p->v, thisray.rcol); |
210 |
scalecolor(p->v, exposure); |
211 |
|
212 |
recolor(p); /* paint it */ |
213 |
|
214 |
if (dev->flush != NULL) { /* shall we check for input? */ |
215 |
static unsigned long lastflush = 0; |
216 |
unsigned long counter = raynum; |
217 |
int flushintvl; |
218 |
if (nproc == 1) { |
219 |
counter = nrays; |
220 |
flushintvl = WFLUSH1; |
221 |
} else if (ambounce == 0) |
222 |
flushintvl = nproc*WFLUSH; |
223 |
else if (niflush < WFLUSH) |
224 |
flushintvl = nproc*niflush/(ambounce+1); |
225 |
else |
226 |
flushintvl = nproc*WFLUSH/(ambounce+1); |
227 |
|
228 |
if (counter - lastflush >= flushintvl) { |
229 |
lastflush = counter; |
230 |
(*dev->flush)(); |
231 |
niflush++; |
232 |
} |
233 |
} |
234 |
return(1); |
235 |
} |
236 |
|
237 |
|
238 |
int |
239 |
waitrays(void) /* finish up pending rays */ |
240 |
{ |
241 |
int nwaited = 0; |
242 |
int rval; |
243 |
RAY raydone; |
244 |
|
245 |
if (nproc == 1) /* immediate mode? */ |
246 |
return(0); |
247 |
while ((rval = ray_presult(&raydone, 0)) > 0) { |
248 |
PNODE *p = (PNODE *)raydone.rno; |
249 |
copycolor(p->v, raydone.rcol); |
250 |
scalecolor(p->v, exposure); |
251 |
recolor(p); |
252 |
nwaited++; |
253 |
} |
254 |
if (rval < 0) |
255 |
return(-1); |
256 |
return(nwaited); |
257 |
} |
258 |
|
259 |
|
260 |
void |
261 |
newimage( /* start a new image */ |
262 |
char *s |
263 |
) |
264 |
{ |
265 |
extern int ray_pnprocs; |
266 |
int newnp; |
267 |
/* change in nproc? */ |
268 |
if (s != NULL && sscanf(s, "%d", &newnp) == 1 && newnp > 0) { |
269 |
if (!newparam) { |
270 |
if (nproc == 1) |
271 |
nproc = 0; /* actually running */ |
272 |
if (newnp == 1) |
273 |
ray_pclose(0); |
274 |
else if (newnp < nproc) |
275 |
ray_pclose(nproc - newnp); |
276 |
else |
277 |
ray_popen(newnp - nproc); |
278 |
} |
279 |
nproc = newnp; |
280 |
} |
281 |
/* free old image */ |
282 |
freepkids(&ptrunk); |
283 |
/* compute resolution */ |
284 |
hresolu = dev->xsiz; |
285 |
vresolu = dev->ysiz; |
286 |
normaspect(viewaspect(&ourview), &dev->pixaspect, &hresolu, &vresolu); |
287 |
ptrunk.xmin = ptrunk.ymin = pframe.l = pframe.d = 0; |
288 |
ptrunk.xmax = pframe.r = hresolu; |
289 |
ptrunk.ymax = pframe.u = vresolu; |
290 |
pdepth = 0; |
291 |
/* clear device */ |
292 |
(*dev->clear)(hresolu, vresolu); |
293 |
|
294 |
if (newparam) { /* (re)start rendering procs */ |
295 |
if (ray_pnprocs > 0) |
296 |
ray_pclose(0); |
297 |
if (nproc > 1) |
298 |
ray_popen(nproc); |
299 |
newparam = 0; |
300 |
} |
301 |
niflush = 0; /* get first value */ |
302 |
paint(&ptrunk); |
303 |
} |
304 |
|
305 |
|
306 |
void |
307 |
redraw(void) /* redraw the image */ |
308 |
{ |
309 |
(*dev->clear)(hresolu, vresolu); |
310 |
(*dev->comout)("redrawing...\n"); |
311 |
repaint(0, 0, hresolu, vresolu); |
312 |
(*dev->comout)("\n"); |
313 |
} |
314 |
|
315 |
|
316 |
void |
317 |
repaint( /* repaint a region */ |
318 |
int xmin, |
319 |
int ymin, |
320 |
int xmax, |
321 |
int ymax |
322 |
) |
323 |
{ |
324 |
RECT reg; |
325 |
|
326 |
reg.l = xmin; reg.r = xmax; |
327 |
reg.d = ymin; reg.u = ymax; |
328 |
|
329 |
paintrect(&ptrunk, ®); |
330 |
} |
331 |
|
332 |
|
333 |
void |
334 |
paintrect( /* paint picture rectangle */ |
335 |
PNODE *p, |
336 |
RECT *r |
337 |
) |
338 |
{ |
339 |
int mx, my; |
340 |
|
341 |
if (p->xmax - p->xmin <= 0 || p->ymax - p->ymin <= 0) |
342 |
return; |
343 |
|
344 |
if (p->kid == NULL) { |
345 |
(*dev->paintr)(greyscale?greyof(p->v):p->v, |
346 |
p->xmin, p->ymin, p->xmax, p->ymax); /* do this */ |
347 |
return; |
348 |
} |
349 |
mx = (p->xmin + p->xmax) >> 1; /* do kids */ |
350 |
my = (p->ymin + p->ymax) >> 1; |
351 |
if (mx > r->l) { |
352 |
if (my > r->d) |
353 |
paintrect(p->kid+DL, r); |
354 |
if (my < r->u) |
355 |
paintrect(p->kid+UL, r); |
356 |
} |
357 |
if (mx < r->r) { |
358 |
if (my > r->d) |
359 |
paintrect(p->kid+DR, r); |
360 |
if (my < r->u) |
361 |
paintrect(p->kid+UR, r); |
362 |
} |
363 |
} |
364 |
|
365 |
|
366 |
PNODE * |
367 |
findrect( /* find a rectangle */ |
368 |
int x, |
369 |
int y, |
370 |
PNODE *p, |
371 |
int pd |
372 |
) |
373 |
{ |
374 |
int mx, my; |
375 |
|
376 |
while (p->kid != NULL && pd--) { |
377 |
|
378 |
mx = (p->xmin + p->xmax) >> 1; |
379 |
my = (p->ymin + p->ymax) >> 1; |
380 |
|
381 |
if (x < mx) { |
382 |
if (y < my) { |
383 |
p = p->kid+DL; |
384 |
} else { |
385 |
p = p->kid+UL; |
386 |
} |
387 |
} else { |
388 |
if (y < my) { |
389 |
p = p->kid+DR; |
390 |
} else { |
391 |
p = p->kid+UR; |
392 |
} |
393 |
} |
394 |
} |
395 |
return(p); |
396 |
} |
397 |
|
398 |
|
399 |
void |
400 |
compavg( /* recompute averages */ |
401 |
PNODE *p |
402 |
) |
403 |
{ |
404 |
int i, navg; |
405 |
|
406 |
if (p->kid == NULL) |
407 |
return; |
408 |
|
409 |
setcolor(p->v, .0, .0, .0); |
410 |
navg = 0; |
411 |
for (i = 0; i < 4; i++) { |
412 |
if (p->kid[i].xmin >= p->kid[i].xmax) continue; |
413 |
if (p->kid[i].ymin >= p->kid[i].ymax) continue; |
414 |
compavg(p->kid+i); |
415 |
addcolor(p->v, p->kid[i].v); |
416 |
navg++; |
417 |
} |
418 |
if (navg > 1) |
419 |
scalecolor(p->v, 1./navg); |
420 |
} |
421 |
|
422 |
|
423 |
void |
424 |
scalepict( /* scale picture values */ |
425 |
PNODE *p, |
426 |
double sf |
427 |
) |
428 |
{ |
429 |
scalecolor(p->v, sf); /* do this node */ |
430 |
|
431 |
if (p->kid == NULL) |
432 |
return; |
433 |
/* do children */ |
434 |
scalepict(p->kid+DL, sf); |
435 |
scalepict(p->kid+DR, sf); |
436 |
scalepict(p->kid+UL, sf); |
437 |
scalepict(p->kid+UR, sf); |
438 |
} |
439 |
|
440 |
|
441 |
void |
442 |
getpictcolrs( /* get scanline from picture */ |
443 |
int yoff, |
444 |
COLR *scan, |
445 |
PNODE *p, |
446 |
int xsiz, |
447 |
int ysiz |
448 |
) |
449 |
{ |
450 |
int mx; |
451 |
int my; |
452 |
|
453 |
if (p->kid == NULL) { /* do this node */ |
454 |
setcolr(scan[0], colval(p->v,RED), |
455 |
colval(p->v,GRN), |
456 |
colval(p->v,BLU)); |
457 |
for (mx = 1; mx < xsiz; mx++) |
458 |
copycolr(scan[mx], scan[0]); |
459 |
return; |
460 |
} |
461 |
/* do kids */ |
462 |
mx = xsiz >> 1; |
463 |
my = ysiz >> 1; |
464 |
if (yoff < my) { |
465 |
getpictcolrs(yoff, scan, p->kid+DL, mx, my); |
466 |
getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my); |
467 |
} else { |
468 |
getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my); |
469 |
getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my); |
470 |
} |
471 |
} |
472 |
|
473 |
|
474 |
void |
475 |
freepkids( /* free pnode's children */ |
476 |
PNODE *p |
477 |
) |
478 |
{ |
479 |
if (p->kid == NULL) |
480 |
return; |
481 |
freepkids(p->kid+DL); |
482 |
freepkids(p->kid+DR); |
483 |
freepkids(p->kid+UL); |
484 |
freepkids(p->kid+UR); |
485 |
free((void *)p->kid); |
486 |
p->kid = NULL; |
487 |
} |
488 |
|
489 |
|
490 |
void |
491 |
newview( /* change viewing parameters */ |
492 |
VIEW *vp |
493 |
) |
494 |
{ |
495 |
char *err; |
496 |
|
497 |
if ((err = setview(vp)) != NULL) { |
498 |
sprintf(errmsg, "view not set - %s", err); |
499 |
error(COMMAND, errmsg); |
500 |
} else if (memcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) { |
501 |
oldview = ourview; |
502 |
ourview = *vp; |
503 |
newimage(NULL); |
504 |
} |
505 |
} |
506 |
|
507 |
|
508 |
void |
509 |
moveview( /* move viewpoint */ |
510 |
double angle, |
511 |
double elev, |
512 |
double mag, |
513 |
FVECT vc |
514 |
) |
515 |
{ |
516 |
double d; |
517 |
FVECT v1; |
518 |
VIEW nv = ourview; |
519 |
int i; |
520 |
|
521 |
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
522 |
if (elev != 0.0) { |
523 |
fcross(v1, ourview.vup, nv.vdir); |
524 |
normalize(v1); |
525 |
spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.)); |
526 |
} |
527 |
if (nv.type == VT_PAR) { |
528 |
nv.horiz /= mag; |
529 |
nv.vert /= mag; |
530 |
d = 0.0; /* don't move closer */ |
531 |
for (i = 0; i < 3; i++) |
532 |
d += (vc[i] - ourview.vp[i])*ourview.vdir[i]; |
533 |
} else { |
534 |
d = sqrt(dist2(ourview.vp, vc)) / mag; |
535 |
if (nv.vfore > FTINY) { |
536 |
nv.vfore += d - d*mag; |
537 |
if (nv.vfore < 0.0) nv.vfore = 0.0; |
538 |
} |
539 |
if (nv.vaft > FTINY) { |
540 |
nv.vaft += d - d*mag; |
541 |
if (nv.vaft <= nv.vfore) nv.vaft = 0.0; |
542 |
} |
543 |
nv.vdist /= mag; |
544 |
} |
545 |
for (i = 0; i < 3; i++) |
546 |
nv.vp[i] = vc[i] - d*nv.vdir[i]; |
547 |
newview(&nv); |
548 |
} |
549 |
|
550 |
|
551 |
void |
552 |
pcopy( /* copy paint node p1 into p2 */ |
553 |
PNODE *p1, |
554 |
PNODE *p2 |
555 |
) |
556 |
{ |
557 |
copycolor(p2->v, p1->v); |
558 |
p2->x = p1->x; |
559 |
p2->y = p1->y; |
560 |
} |
561 |
|
562 |
|
563 |
void |
564 |
zoomview( /* zoom in or out */ |
565 |
VIEW *vp, |
566 |
double zf |
567 |
) |
568 |
{ |
569 |
switch (vp->type) { |
570 |
case VT_PAR: /* parallel view */ |
571 |
vp->horiz /= zf; |
572 |
vp->vert /= zf; |
573 |
return; |
574 |
case VT_ANG: /* angular fisheye */ |
575 |
vp->horiz /= zf; |
576 |
if (vp->horiz > 360.) |
577 |
vp->horiz = 360.; |
578 |
vp->vert /= zf; |
579 |
if (vp->vert > 360.) |
580 |
vp->vert = 360.; |
581 |
return; |
582 |
case VT_PLS: /* planisphere fisheye */ |
583 |
vp->horiz = sin((PI/180./2.)*vp->horiz) / |
584 |
(1.0 + cos((PI/180./2.)*vp->horiz)) / zf; |
585 |
vp->horiz *= vp->horiz; |
586 |
vp->horiz = (2.*180./PI)*acos((1. - vp->horiz) / |
587 |
(1. + vp->horiz)); |
588 |
vp->vert = sin((PI/180./2.)*vp->vert) / |
589 |
(1.0 + cos((PI/180./2.)*vp->vert)) / zf; |
590 |
vp->vert *= vp->vert; |
591 |
vp->vert = (2.*180./PI)*acos((1. - vp->vert) / |
592 |
(1. + vp->vert)); |
593 |
return; |
594 |
case VT_CYL: /* cylindrical panorama */ |
595 |
vp->horiz /= zf; |
596 |
if (vp->horiz > 360.) |
597 |
vp->horiz = 360.; |
598 |
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / (PI/180./2.); |
599 |
return; |
600 |
case VT_PER: /* perspective view */ |
601 |
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |
602 |
(PI/180./2.); |
603 |
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / |
604 |
(PI/180./2.); |
605 |
return; |
606 |
case VT_HEM: /* hemispherical fisheye */ |
607 |
vp->horiz = sin(vp->horiz*(PI/180./2.))/zf; |
608 |
if (vp->horiz >= 1.0-FTINY) |
609 |
vp->horiz = 180.; |
610 |
else |
611 |
vp->horiz = asin(vp->horiz) / (PI/180./2.); |
612 |
vp->vert = sin(vp->vert*(PI/180./2.))/zf; |
613 |
if (vp->vert >= 1.0-FTINY) |
614 |
vp->vert = 180.; |
615 |
else |
616 |
vp->vert = asin(vp->vert) / (PI/180./2.); |
617 |
return; |
618 |
} |
619 |
} |