1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rv2.c,v 2.62 2011/10/05 17:20:55 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* rv2.c - command routines used in tracing a view. |
6 |
* |
7 |
* External symbols declared in rpaint.h |
8 |
*/ |
9 |
|
10 |
#include "copyright.h" |
11 |
|
12 |
#include <ctype.h> |
13 |
#include <string.h> |
14 |
|
15 |
#include "platform.h" |
16 |
#include "rtprocess.h" /* win_popen() */ |
17 |
#include "paths.h" |
18 |
#include "ray.h" |
19 |
#include "source.h" |
20 |
#include "ambient.h" |
21 |
#include "otypes.h" |
22 |
#include "rpaint.h" |
23 |
|
24 |
extern int psample; /* pixel sample size */ |
25 |
extern double maxdiff; /* max. sample difference */ |
26 |
|
27 |
#define CTRL(c) ((c)-'@') |
28 |
|
29 |
#ifdef SMLFLT |
30 |
#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
31 |
#else |
32 |
#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3) |
33 |
#endif |
34 |
|
35 |
extern char rifname[128]; /* rad input file name */ |
36 |
|
37 |
extern char *progname; |
38 |
extern char *octname; |
39 |
|
40 |
|
41 |
void |
42 |
getframe( /* get a new frame */ |
43 |
char *s |
44 |
) |
45 |
{ |
46 |
if (getrect(s, &pframe) < 0) |
47 |
return; |
48 |
pdepth = 0; |
49 |
} |
50 |
|
51 |
|
52 |
void |
53 |
getrepaint( /* get area and repaint */ |
54 |
char *s |
55 |
) |
56 |
{ |
57 |
RECT box; |
58 |
|
59 |
if (getrect(s, &box) < 0) |
60 |
return; |
61 |
paintrect(&ptrunk, &box); |
62 |
} |
63 |
|
64 |
|
65 |
void |
66 |
getview( /* get/show/save view parameters */ |
67 |
char *s |
68 |
) |
69 |
{ |
70 |
FILE *fp; |
71 |
char buf[128]; |
72 |
char *fname; |
73 |
int change = 0; |
74 |
VIEW nv = ourview; |
75 |
|
76 |
while (isspace(*s)) |
77 |
s++; |
78 |
if (*s == '-') { /* command line parameters */ |
79 |
if (sscanview(&nv, s)) |
80 |
newview(&nv); |
81 |
else |
82 |
error(COMMAND, "bad view option(s)"); |
83 |
return; |
84 |
} |
85 |
if (nextword(buf, sizeof(buf), s) != NULL) { /* write to a file */ |
86 |
if ((fname = getpath(buf, NULL, 0)) == NULL || |
87 |
(fp = fopen(fname, "a")) == NULL) { |
88 |
sprintf(errmsg, "cannot open \"%s\"", buf); |
89 |
error(COMMAND, errmsg); |
90 |
return; |
91 |
} |
92 |
fputs(progname, fp); |
93 |
fprintview(&ourview, fp); |
94 |
fputs(sskip(s), fp); |
95 |
putc('\n', fp); |
96 |
fclose(fp); |
97 |
return; |
98 |
} |
99 |
sprintf(buf, "view type (%c): ", ourview.type); |
100 |
(*dev->comout)(buf); |
101 |
(*dev->comin)(buf, NULL); |
102 |
if (buf[0] == CTRL('C')) return; |
103 |
if (buf[0] && buf[0] != ourview.type) { |
104 |
nv.type = buf[0]; |
105 |
change++; |
106 |
} |
107 |
sprintf(buf, "view point (%.6g %.6g %.6g): ", |
108 |
ourview.vp[0], ourview.vp[1], ourview.vp[2]); |
109 |
(*dev->comout)(buf); |
110 |
(*dev->comin)(buf, NULL); |
111 |
if (buf[0] == CTRL('C')) return; |
112 |
if (sscanvec(buf, nv.vp)) |
113 |
change++; |
114 |
sprintf(buf, "view direction (%.6g %.6g %.6g): ", |
115 |
ourview.vdir[0]*ourview.vdist, |
116 |
ourview.vdir[1]*ourview.vdist, |
117 |
ourview.vdir[2]*ourview.vdist); |
118 |
(*dev->comout)(buf); |
119 |
(*dev->comin)(buf, NULL); |
120 |
if (buf[0] == CTRL('C')) return; |
121 |
if (sscanvec(buf, nv.vdir)) { |
122 |
nv.vdist = 1.; |
123 |
change++; |
124 |
} |
125 |
sprintf(buf, "view up (%.6g %.6g %.6g): ", |
126 |
ourview.vup[0], ourview.vup[1], ourview.vup[2]); |
127 |
(*dev->comout)(buf); |
128 |
(*dev->comin)(buf, NULL); |
129 |
if (buf[0] == CTRL('C')) return; |
130 |
if (sscanvec(buf, nv.vup)) |
131 |
change++; |
132 |
sprintf(buf, "view horiz and vert size (%.6g %.6g): ", |
133 |
ourview.horiz, ourview.vert); |
134 |
(*dev->comout)(buf); |
135 |
(*dev->comin)(buf, NULL); |
136 |
if (buf[0] == CTRL('C')) return; |
137 |
if (sscanf(buf, "%lf %lf", &nv.horiz, &nv.vert) == 2) |
138 |
change++; |
139 |
sprintf(buf, "fore and aft clipping plane (%.6g %.6g): ", |
140 |
ourview.vfore, ourview.vaft); |
141 |
(*dev->comout)(buf); |
142 |
(*dev->comin)(buf, NULL); |
143 |
if (buf[0] == CTRL('C')) return; |
144 |
if (sscanf(buf, "%lf %lf", &nv.vfore, &nv.vaft) == 2) |
145 |
change++; |
146 |
sprintf(buf, "view shift and lift (%.6g %.6g): ", |
147 |
ourview.hoff, ourview.voff); |
148 |
(*dev->comout)(buf); |
149 |
(*dev->comin)(buf, NULL); |
150 |
if (buf[0] == CTRL('C')) return; |
151 |
if (sscanf(buf, "%lf %lf", &nv.hoff, &nv.voff) == 2) |
152 |
change++; |
153 |
if (change) |
154 |
newview(&nv); |
155 |
} |
156 |
|
157 |
|
158 |
void |
159 |
lastview( /* return to a previous view */ |
160 |
char *s |
161 |
) |
162 |
{ |
163 |
char buf[128]; |
164 |
char *fname; |
165 |
int success; |
166 |
VIEW nv; |
167 |
/* get parameters from a file */ |
168 |
if (nextword(buf, sizeof(buf), s) != NULL) { |
169 |
nv = stdview; |
170 |
if ((fname = getpath(buf, "", R_OK)) == NULL || |
171 |
(success = viewfile(fname, &nv, NULL)) == -1) { |
172 |
sprintf(errmsg, "cannot open \"%s\"", buf); |
173 |
error(COMMAND, errmsg); |
174 |
return; |
175 |
} |
176 |
if (!success) |
177 |
error(COMMAND, "wrong file format"); |
178 |
else |
179 |
newview(&nv); |
180 |
return; |
181 |
} |
182 |
if (oldview.type == 0) { /* no old view! */ |
183 |
error(COMMAND, "no previous view"); |
184 |
return; |
185 |
} |
186 |
nv = ourview; |
187 |
ourview = oldview; |
188 |
oldview = nv; |
189 |
newimage(NULL); |
190 |
} |
191 |
|
192 |
|
193 |
void |
194 |
saveview( /* save view to rad file */ |
195 |
char *s |
196 |
) |
197 |
{ |
198 |
char view[64]; |
199 |
char *fname; |
200 |
FILE *fp; |
201 |
|
202 |
if (*atos(view, sizeof(view), s)) { |
203 |
if (isint(view)) { |
204 |
error(COMMAND, "cannot write view by number"); |
205 |
return; |
206 |
} |
207 |
s = sskip(s); |
208 |
} |
209 |
if (nextword(rifname, sizeof(rifname), s) == NULL && !rifname[0]) { |
210 |
error(COMMAND, "no previous rad file"); |
211 |
return; |
212 |
} |
213 |
if ((fname = getpath(rifname, NULL, 0)) == NULL || |
214 |
(fp = fopen(fname, "a")) == NULL) { |
215 |
sprintf(errmsg, "cannot open \"%s\"", rifname); |
216 |
error(COMMAND, errmsg); |
217 |
return; |
218 |
} |
219 |
fputs("view= ", fp); |
220 |
fputs(view, fp); |
221 |
fprintview(&ourview, fp); |
222 |
putc('\n', fp); |
223 |
fclose(fp); |
224 |
} |
225 |
|
226 |
|
227 |
void |
228 |
loadview( /* load view from rad file */ |
229 |
char *s |
230 |
) |
231 |
{ |
232 |
char buf[512]; |
233 |
char *fname; |
234 |
FILE *fp; |
235 |
VIEW nv; |
236 |
|
237 |
strcpy(buf, "rad -n -s -V -v "); |
238 |
if (sscanf(s, "%s", buf+strlen(buf)) == 1) |
239 |
s = sskip(s); |
240 |
else |
241 |
strcat(buf, "1"); |
242 |
if (nextword(rifname, sizeof(rifname), s) == NULL && !rifname[0]) { |
243 |
error(COMMAND, "no previous rad file"); |
244 |
return; |
245 |
} |
246 |
if ((fname = getpath(rifname, "", R_OK)) == NULL) { |
247 |
sprintf(errmsg, "cannot access \"%s\"", rifname); |
248 |
error(COMMAND, errmsg); |
249 |
return; |
250 |
} |
251 |
sprintf(buf+strlen(buf), " %s", fname); |
252 |
if ((fp = popen(buf, "r")) == NULL) { |
253 |
error(COMMAND, "cannot run rad"); |
254 |
return; |
255 |
} |
256 |
buf[0] = '\0'; |
257 |
fgets(buf, sizeof(buf), fp); |
258 |
pclose(fp); |
259 |
nv = stdview; |
260 |
if (!sscanview(&nv, buf)) { |
261 |
error(COMMAND, "rad error -- no such view?"); |
262 |
return; |
263 |
} |
264 |
newview(&nv); |
265 |
} |
266 |
|
267 |
|
268 |
void |
269 |
getaim( /* aim camera */ |
270 |
char *s |
271 |
) |
272 |
{ |
273 |
VIEW nv = ourview; |
274 |
double zfact; |
275 |
|
276 |
if (getinterest(s, 1, nv.vdir, &zfact) < 0) |
277 |
return; |
278 |
zoomview(&nv, zfact); |
279 |
newview(&nv); |
280 |
} |
281 |
|
282 |
|
283 |
void |
284 |
getfocus( /* set focus distance */ |
285 |
char *s |
286 |
) |
287 |
{ |
288 |
char buf[64]; |
289 |
double dist; |
290 |
|
291 |
if (sscanf(s, "%lf", &dist) < 1) { |
292 |
int x, y; |
293 |
RAY thisray; |
294 |
if (dev->getcur == NULL) |
295 |
return; |
296 |
(*dev->comout)("Pick focus point\n"); |
297 |
if ((*dev->getcur)(&x, &y) == ABORT) |
298 |
return; |
299 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
300 |
&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
301 |
error(COMMAND, "not on image"); |
302 |
return; |
303 |
} |
304 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
305 |
if (!localhit(&thisray, &thescene)) { |
306 |
error(COMMAND, "not a local object"); |
307 |
return; |
308 |
} |
309 |
dist = thisray.rot; |
310 |
} else if (dist <= .0) { |
311 |
error(COMMAND, "focus distance must be positive"); |
312 |
return; |
313 |
} |
314 |
ourview.vdist = dist; |
315 |
sprintf(buf, "Focus distance set to %f\n", dist); |
316 |
(*dev->comout)(buf); |
317 |
} |
318 |
|
319 |
|
320 |
void |
321 |
getmove( /* move camera */ |
322 |
char *s |
323 |
) |
324 |
{ |
325 |
FVECT vc; |
326 |
double mag; |
327 |
|
328 |
if (getinterest(s, 0, vc, &mag) < 0) |
329 |
return; |
330 |
moveview(0.0, 0.0, mag, vc); |
331 |
} |
332 |
|
333 |
|
334 |
void |
335 |
getrotate( /* rotate camera */ |
336 |
char *s |
337 |
) |
338 |
{ |
339 |
VIEW nv = ourview; |
340 |
double angle, elev, zfact; |
341 |
|
342 |
elev = 0.0; zfact = 1.0; |
343 |
if (sscanf(s, "%lf %lf %lf", &angle, &elev, &zfact) < 1) { |
344 |
error(COMMAND, "missing angle"); |
345 |
return; |
346 |
} |
347 |
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
348 |
if (elev != 0.0) |
349 |
geodesic(nv.vdir, nv.vdir, nv.vup, elev*(PI/180.), GEOD_RAD); |
350 |
|
351 |
zoomview(&nv, zfact); |
352 |
newview(&nv); |
353 |
} |
354 |
|
355 |
|
356 |
void |
357 |
getpivot( /* pivot viewpoint */ |
358 |
char *s |
359 |
) |
360 |
{ |
361 |
FVECT vc; |
362 |
double angle, elev, mag; |
363 |
|
364 |
elev = 0.0; |
365 |
if (sscanf(s, "%lf %lf", &angle, &elev) < 1) { |
366 |
error(COMMAND, "missing angle"); |
367 |
return; |
368 |
} |
369 |
if (getinterest(sskip2(s,2), 0, vc, &mag) < 0) |
370 |
return; |
371 |
moveview(angle, elev, mag, vc); |
372 |
} |
373 |
|
374 |
|
375 |
void |
376 |
getexposure( /* get new exposure */ |
377 |
char *s |
378 |
) |
379 |
{ |
380 |
char buf[128]; |
381 |
char *cp; |
382 |
int x, y; |
383 |
PNODE *p = &ptrunk; |
384 |
int adapt = 0; |
385 |
double e = 1.0; |
386 |
|
387 |
for (cp = s; isspace(*cp); cp++) |
388 |
; |
389 |
if (*cp == '@') { |
390 |
adapt++; |
391 |
while (isspace(*++cp)) |
392 |
; |
393 |
} |
394 |
if (*cp == '\0') { /* normalize to point */ |
395 |
if (dev->getcur == NULL) |
396 |
return; |
397 |
(*dev->comout)("Pick point for exposure\n"); |
398 |
if ((*dev->getcur)(&x, &y) == ABORT) |
399 |
return; |
400 |
p = findrect(x, y, &ptrunk, -1); |
401 |
} else { |
402 |
if (*cp == '=') { /* absolute setting */ |
403 |
p = NULL; |
404 |
e = 1.0/exposure; |
405 |
for (cp++; isspace(*cp); cp++) |
406 |
; |
407 |
if (*cp == '\0') { /* interactive */ |
408 |
sprintf(buf, "exposure (%f): ", exposure); |
409 |
(*dev->comout)(buf); |
410 |
(*dev->comin)(buf, NULL); |
411 |
for (cp = buf; isspace(*cp); cp++) |
412 |
; |
413 |
if (*cp == '\0') |
414 |
return; |
415 |
} |
416 |
} |
417 |
if (*cp == '+' || *cp == '-') /* f-stops */ |
418 |
e *= pow(2.0, atof(cp)); |
419 |
else /* multiplier */ |
420 |
e *= atof(cp); |
421 |
} |
422 |
if (p != NULL) { /* relative setting */ |
423 |
compavg(p); |
424 |
if (bright(p->v) < 1e-15) { |
425 |
error(COMMAND, "cannot normalize to zero"); |
426 |
return; |
427 |
} |
428 |
if (adapt) |
429 |
e *= 106./pow(1.219+pow(luminance(p->v)/exposure,.4),2.5)/exposure; |
430 |
else |
431 |
e *= 0.5 / bright(p->v); |
432 |
} |
433 |
if (e <= FTINY || fabs(1.0 - e) <= FTINY) |
434 |
return; |
435 |
scalepict(&ptrunk, e); |
436 |
exposure *= e; |
437 |
redraw(); |
438 |
} |
439 |
|
440 |
typedef union {int i; double d; COLOR C;} *MyUptr; |
441 |
#define FEQ(x,y) (fabs((x)-(y)) <= FTINY) |
442 |
|
443 |
int |
444 |
getparam( /* get variable from user */ |
445 |
char *str, |
446 |
char *dsc, |
447 |
int typ, |
448 |
void *p |
449 |
) |
450 |
{ |
451 |
MyUptr ptr = (MyUptr)p; |
452 |
int i0; |
453 |
double d0, d1, d2; |
454 |
char buf[48]; |
455 |
|
456 |
switch (typ) { |
457 |
case 'i': /* integer */ |
458 |
if (sscanf(str, "%d", &i0) != 1) { |
459 |
(*dev->comout)(dsc); |
460 |
sprintf(buf, " (%d): ", ptr->i); |
461 |
(*dev->comout)(buf); |
462 |
(*dev->comin)(buf, NULL); |
463 |
if (sscanf(buf, "%d", &i0) != 1) |
464 |
return(0); |
465 |
} |
466 |
if (ptr->i == i0) |
467 |
return(0); |
468 |
ptr->i = i0; |
469 |
break; |
470 |
case 'r': /* real */ |
471 |
if (sscanf(str, "%lf", &d0) != 1) { |
472 |
(*dev->comout)(dsc); |
473 |
sprintf(buf, " (%.6g): ", ptr->d); |
474 |
(*dev->comout)(buf); |
475 |
(*dev->comin)(buf, NULL); |
476 |
if (sscanf(buf, "%lf", &d0) != 1) |
477 |
return(0); |
478 |
} |
479 |
if (FEQ(ptr->d, d0)) |
480 |
return(0); |
481 |
ptr->d = d0; |
482 |
break; |
483 |
case 'b': /* boolean */ |
484 |
if (sscanf(str, "%1s", buf) != 1) { |
485 |
(*dev->comout)(dsc); |
486 |
sprintf(buf, "? (%c): ", ptr->i ? 'y' : 'n'); |
487 |
(*dev->comout)(buf); |
488 |
(*dev->comin)(buf, NULL); |
489 |
if (buf[0] == '\0') |
490 |
return(0); |
491 |
} |
492 |
if (strchr("yY+1tTnN-0fF", buf[0]) == NULL) |
493 |
return(0); |
494 |
i0 = strchr("yY+1tT", buf[0]) != NULL; |
495 |
if (ptr->i == i0) |
496 |
return(0); |
497 |
ptr->i = i0; |
498 |
break; |
499 |
case 'C': /* color */ |
500 |
if (sscanf(str, "%lf %lf %lf", &d0, &d1, &d2) != 3) { |
501 |
(*dev->comout)(dsc); |
502 |
sprintf(buf, " (%.6g %.6g %.6g): ", |
503 |
colval(ptr->C,RED), |
504 |
colval(ptr->C,GRN), |
505 |
colval(ptr->C,BLU)); |
506 |
(*dev->comout)(buf); |
507 |
(*dev->comin)(buf, NULL); |
508 |
if (sscanf(buf, "%lf %lf %lf", &d0, &d1, &d2) != 3) |
509 |
return(0); |
510 |
} |
511 |
if (FEQ(colval(ptr->C,RED), d0) && |
512 |
FEQ(colval(ptr->C,GRN), d1) && |
513 |
FEQ(colval(ptr->C,BLU), d2)) |
514 |
return(0); |
515 |
setcolor(ptr->C, d0, d1, d2); |
516 |
break; |
517 |
default: |
518 |
return(0); /* shouldn't happen */ |
519 |
} |
520 |
newparam++; |
521 |
return(1); |
522 |
} |
523 |
|
524 |
|
525 |
void |
526 |
setparam( /* get/set program parameter */ |
527 |
char *s |
528 |
) |
529 |
{ |
530 |
int prev_newp = newparam; |
531 |
char buf[128]; |
532 |
|
533 |
if (s[0] == '\0') { |
534 |
(*dev->comout)( |
535 |
"aa ab ad ar as av aw b bv dc dv dj ds dt i lr lw me ma mg ms ps pt ss st u: "); |
536 |
(*dev->comin)(buf, NULL); |
537 |
s = buf; |
538 |
} |
539 |
switch (s[0]) { |
540 |
case 'u': /* uncorrelated sampling */ |
541 |
getparam(s+1, "uncorrelated sampling", 'b', |
542 |
(void *)&rand_samp); |
543 |
break; |
544 |
case 'l': /* limit */ |
545 |
switch (s[1]) { |
546 |
case 'w': /* weight */ |
547 |
getparam(s+2, "limit weight", 'r', |
548 |
(void *)&minweight); |
549 |
break; |
550 |
case 'r': /* reflection */ |
551 |
getparam(s+2, "limit reflection", 'i', |
552 |
(void *)&maxdepth); |
553 |
break; |
554 |
default: |
555 |
goto badparam; |
556 |
} |
557 |
break; |
558 |
case 'd': /* direct */ |
559 |
switch (s[1]) { |
560 |
case 'j': /* jitter */ |
561 |
getparam(s+2, "direct jitter", 'r', |
562 |
(void *)&dstrsrc); |
563 |
break; |
564 |
case 'c': /* certainty */ |
565 |
getparam(s+2, "direct certainty", 'r', |
566 |
(void *)&shadcert); |
567 |
break; |
568 |
case 't': /* threshold */ |
569 |
getparam(s+2, "direct threshold", 'r', |
570 |
(void *)&shadthresh); |
571 |
break; |
572 |
case 'v': /* visibility */ |
573 |
getparam(s+2, "direct visibility", 'b', |
574 |
(void *)&directvis); |
575 |
break; |
576 |
case 's': /* sampling */ |
577 |
getparam(s+2, "direct sampling", 'r', |
578 |
(void *)&srcsizerat); |
579 |
break; |
580 |
default: |
581 |
goto badparam; |
582 |
} |
583 |
break; |
584 |
case 'b': /* back faces or black and white */ |
585 |
switch (s[1]) { |
586 |
case 'v': /* back face visibility */ |
587 |
getparam(s+2, "back face visibility", 'b', |
588 |
(void *)&backvis); |
589 |
break; |
590 |
case '\0': /* black and white */ |
591 |
case ' ': |
592 |
case 'y': case 'Y': case 't': case 'T': case '1': case '+': |
593 |
case 'n': case 'N': case 'f': case 'F': case '0': case '-': |
594 |
getparam(s+1, "black and white", 'b', |
595 |
(void *)&greyscale); |
596 |
newparam = prev_newp; |
597 |
break; |
598 |
default: |
599 |
goto badparam; |
600 |
} |
601 |
break; |
602 |
case 'i': /* irradiance */ |
603 |
getparam(s+1, "irradiance", 'b', |
604 |
(void *)&do_irrad); |
605 |
break; |
606 |
case 'a': /* ambient */ |
607 |
switch (s[1]) { |
608 |
case 'v': /* value */ |
609 |
getparam(s+2, "ambient value", 'C', |
610 |
(void *)ambval); |
611 |
break; |
612 |
case 'w': /* weight */ |
613 |
getparam(s+2, "ambient value weight", 'i', |
614 |
(void *)&ambvwt); |
615 |
break; |
616 |
case 'a': /* accuracy */ |
617 |
if (getparam(s+2, "ambient accuracy", 'r', |
618 |
(void *)&ambacc)) |
619 |
setambacc(ambacc); |
620 |
break; |
621 |
case 'd': /* divisions */ |
622 |
getparam(s+2, "ambient divisions", 'i', |
623 |
(void *)&ambdiv); |
624 |
break; |
625 |
case 's': /* samples */ |
626 |
getparam(s+2, "ambient super-samples", 'i', |
627 |
(void *)&ambssamp); |
628 |
break; |
629 |
case 'b': /* bounces */ |
630 |
getparam(s+2, "ambient bounces", 'i', |
631 |
(void *)&ambounce); |
632 |
break; |
633 |
case 'r': |
634 |
if (getparam(s+2, "ambient resolution", 'i', |
635 |
(void *)&ambres)) |
636 |
setambres(ambres); |
637 |
break; |
638 |
default: |
639 |
goto badparam; |
640 |
} |
641 |
break; |
642 |
case 'm': /* medium */ |
643 |
switch (s[1]) { |
644 |
case 'e': /* extinction coefficient */ |
645 |
getparam(s+2, "extinction coefficient", 'C', |
646 |
(void *)cextinction); |
647 |
break; |
648 |
case 'a': /* scattering albedo */ |
649 |
getparam(s+2, "scattering albedo", 'C', |
650 |
(void *)salbedo); |
651 |
break; |
652 |
case 'g': /* scattering eccentricity */ |
653 |
getparam(s+2, "scattering eccentricity", 'r', |
654 |
(void *)&seccg); |
655 |
break; |
656 |
case 's': /* sampling distance */ |
657 |
getparam(s+2, "mist sampling distance", 'r', |
658 |
(void *)&ssampdist); |
659 |
break; |
660 |
default: |
661 |
goto badparam; |
662 |
} |
663 |
break; |
664 |
case 'p': /* pixel */ |
665 |
switch (s[1]) { |
666 |
case 's': /* sample */ |
667 |
if (getparam(s+2, "pixel sample", 'i', |
668 |
(void *)&psample)) |
669 |
pdepth = 0; |
670 |
break; |
671 |
case 't': /* threshold */ |
672 |
if (getparam(s+2, "pixel threshold", 'r', |
673 |
(void *)&maxdiff)) |
674 |
pdepth = 0; |
675 |
break; |
676 |
default: |
677 |
goto badparam; |
678 |
} |
679 |
newparam = prev_newp; |
680 |
break; |
681 |
case 's': /* specular */ |
682 |
switch (s[1]) { |
683 |
case 's': /* sampling */ |
684 |
getparam(s+2, "specular sampling", 'r', |
685 |
(void *)&specjitter); |
686 |
break; |
687 |
case 't': /* threshold */ |
688 |
getparam(s+2, "specular threshold", 'r', |
689 |
(void *)&specthresh); |
690 |
break; |
691 |
default: |
692 |
goto badparam; |
693 |
} |
694 |
break; |
695 |
case '\0': /* nothing */ |
696 |
break; |
697 |
default:; |
698 |
badparam: |
699 |
*sskip(s) = '\0'; |
700 |
sprintf(errmsg, "%s: unknown variable", s); |
701 |
error(COMMAND, errmsg); |
702 |
break; |
703 |
} |
704 |
} |
705 |
|
706 |
|
707 |
void |
708 |
traceray( /* trace a single ray */ |
709 |
char *s |
710 |
) |
711 |
{ |
712 |
RAY thisray; |
713 |
char buf[512]; |
714 |
|
715 |
thisray.rmax = 0.0; |
716 |
|
717 |
if (!sscanvec(s, thisray.rorg) || |
718 |
!sscanvec(sskip2(s,3), thisray.rdir)) { |
719 |
int x, y; |
720 |
|
721 |
if (dev->getcur == NULL) |
722 |
return; |
723 |
(*dev->comout)("Pick ray\n"); |
724 |
if ((*dev->getcur)(&x, &y) == ABORT) |
725 |
return; |
726 |
|
727 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
728 |
&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
729 |
error(COMMAND, "not on image"); |
730 |
return; |
731 |
} |
732 |
|
733 |
} else if (normalize(thisray.rdir) == 0.0) { |
734 |
error(COMMAND, "zero ray direction"); |
735 |
return; |
736 |
} |
737 |
|
738 |
ray_trace(&thisray); |
739 |
|
740 |
if (thisray.ro == NULL) |
741 |
(*dev->comout)("ray hit nothing"); |
742 |
else { |
743 |
OBJREC *mat = NULL; |
744 |
OBJREC *mod = NULL; |
745 |
char matspec[256]; |
746 |
OBJREC *ino; |
747 |
|
748 |
matspec[0] = '\0'; |
749 |
if (thisray.ro->omod != OVOID) { |
750 |
mod = objptr(thisray.ro->omod); |
751 |
mat = findmaterial(mod); |
752 |
} |
753 |
if (thisray.rod < 0.0) |
754 |
strcpy(matspec, "back of "); |
755 |
if (mod != NULL) { |
756 |
strcat(matspec, mod->oname); |
757 |
if (mat != mod && mat != NULL) |
758 |
sprintf(matspec+strlen(matspec), |
759 |
" (%s)", mat->oname); |
760 |
} else |
761 |
strcat(matspec, VOIDID); |
762 |
sprintf(buf, "ray hit %s %s \"%s\"", matspec, |
763 |
ofun[thisray.ro->otype].funame, |
764 |
thisray.ro->oname); |
765 |
if ((ino = objptr(thisray.robj)) != thisray.ro) |
766 |
sprintf(buf+strlen(buf), " in %s \"%s\"", |
767 |
ofun[ino->otype].funame, ino->oname); |
768 |
(*dev->comout)(buf); |
769 |
(*dev->comin)(buf, NULL); |
770 |
if (thisray.rot >= FHUGE) |
771 |
(*dev->comout)("at infinity"); |
772 |
else { |
773 |
sprintf(buf, "at (%.6g %.6g %.6g) (%.6g)", |
774 |
thisray.rop[0], thisray.rop[1], |
775 |
thisray.rop[2], thisray.rt); |
776 |
(*dev->comout)(buf); |
777 |
} |
778 |
(*dev->comin)(buf, NULL); |
779 |
sprintf(buf, "value (%.5g %.5g %.5g) (%.3gL)", |
780 |
colval(thisray.rcol,RED), |
781 |
colval(thisray.rcol,GRN), |
782 |
colval(thisray.rcol,BLU), |
783 |
luminance(thisray.rcol)); |
784 |
(*dev->comout)(buf); |
785 |
} |
786 |
(*dev->comin)(buf, NULL); |
787 |
} |
788 |
|
789 |
|
790 |
void |
791 |
writepict( /* write the picture to a file */ |
792 |
char *s |
793 |
) |
794 |
{ |
795 |
static char buf[128]; |
796 |
char *fname; |
797 |
FILE *fp; |
798 |
COLR *scanline; |
799 |
int y; |
800 |
/* XXX relies on words.c 2.11 behavior */ |
801 |
if (nextword(buf, sizeof(buf), s) == NULL && !buf[0]) { |
802 |
error(COMMAND, "no file"); |
803 |
return; |
804 |
} |
805 |
if ((fname = getpath(buf, NULL, 0)) == NULL || |
806 |
(fp = fopen(fname, "w")) == NULL) { |
807 |
sprintf(errmsg, "cannot open \"%s\"", buf); |
808 |
error(COMMAND, errmsg); |
809 |
return; |
810 |
} |
811 |
SET_FILE_BINARY(fp); |
812 |
(*dev->comout)("writing \""); |
813 |
(*dev->comout)(fname); |
814 |
(*dev->comout)("\"...\n"); |
815 |
/* write header */ |
816 |
newheader("RADIANCE", fp); |
817 |
fputs(progname, fp); |
818 |
fprintview(&ourview, fp); |
819 |
if (octname != NULL) |
820 |
fprintf(fp, " %s\n", octname); |
821 |
else |
822 |
putc('\n', fp); |
823 |
fprintf(fp, "SOFTWARE= %s\n", VersionID); |
824 |
fputnow(fp); |
825 |
if (exposure != 1.0) |
826 |
fputexpos(exposure, fp); |
827 |
if (dev->pixaspect != 1.0) |
828 |
fputaspect(dev->pixaspect, fp); |
829 |
fputformat(COLRFMT, fp); |
830 |
putc('\n', fp); |
831 |
fprtresolu(hresolu, vresolu, fp); |
832 |
|
833 |
scanline = (COLR *)malloc(hresolu*sizeof(COLR)); |
834 |
if (scanline == NULL) { |
835 |
error(COMMAND, "not enough memory!"); |
836 |
fclose(fp); |
837 |
unlink(fname); |
838 |
return; |
839 |
} |
840 |
for (y = vresolu-1; y >= 0; y--) { |
841 |
getpictcolrs(y, scanline, &ptrunk, hresolu, vresolu); |
842 |
if (fwritecolrs(scanline, hresolu, fp) < 0) |
843 |
break; |
844 |
} |
845 |
free((void *)scanline); |
846 |
if (fclose(fp) < 0) |
847 |
error(COMMAND, "write error"); |
848 |
} |