1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rv2.c,v 2.57 2008/08/29 00:30:51 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 "ray.h" |
17 |
#include "source.h" |
18 |
#include "ambient.h" |
19 |
#include "otypes.h" |
20 |
#include "rpaint.h" |
21 |
|
22 |
extern int psample; /* pixel sample size */ |
23 |
extern double maxdiff; /* max. sample difference */ |
24 |
|
25 |
#define CTRL(c) ((c)-'@') |
26 |
|
27 |
#ifdef SMLFLT |
28 |
#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
29 |
#else |
30 |
#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3) |
31 |
#endif |
32 |
|
33 |
extern char rifname[128]; /* rad input file name */ |
34 |
|
35 |
extern char *progname; |
36 |
extern char *octname; |
37 |
|
38 |
|
39 |
void |
40 |
getframe( /* get a new frame */ |
41 |
char *s |
42 |
) |
43 |
{ |
44 |
if (getrect(s, &pframe) < 0) |
45 |
return; |
46 |
pdepth = 0; |
47 |
} |
48 |
|
49 |
|
50 |
void |
51 |
getrepaint( /* get area and repaint */ |
52 |
char *s |
53 |
) |
54 |
{ |
55 |
RECT box; |
56 |
|
57 |
if (getrect(s, &box) < 0) |
58 |
return; |
59 |
paintrect(&ptrunk, &box); |
60 |
} |
61 |
|
62 |
|
63 |
void |
64 |
getview( /* get/show view parameters */ |
65 |
char *s |
66 |
) |
67 |
{ |
68 |
FILE *fp; |
69 |
char buf[128]; |
70 |
char *fname; |
71 |
int change = 0; |
72 |
VIEW nv = ourview; |
73 |
|
74 |
while (isspace(*s)) |
75 |
s++; |
76 |
if (*s == '-') { /* command line parameters */ |
77 |
if (sscanview(&nv, s)) |
78 |
newview(&nv); |
79 |
else |
80 |
error(COMMAND, "bad view option(s)"); |
81 |
return; |
82 |
} |
83 |
if (sscanf(s, "%s", buf) == 1) { /* write parameters to a file */ |
84 |
if ((fname = getpath(buf, NULL, 0)) == NULL || |
85 |
(fp = fopen(fname, "a")) == NULL) { |
86 |
sprintf(errmsg, "cannot open \"%s\"", buf); |
87 |
error(COMMAND, errmsg); |
88 |
return; |
89 |
} |
90 |
fputs(progname, fp); |
91 |
fprintview(&ourview, fp); |
92 |
fputs(sskip(s), fp); |
93 |
putc('\n', fp); |
94 |
fclose(fp); |
95 |
return; |
96 |
} |
97 |
sprintf(buf, "view type (%c): ", ourview.type); |
98 |
(*dev->comout)(buf); |
99 |
(*dev->comin)(buf, NULL); |
100 |
if (buf[0] == CTRL('C')) return; |
101 |
if (buf[0] && buf[0] != ourview.type) { |
102 |
nv.type = buf[0]; |
103 |
change++; |
104 |
} |
105 |
sprintf(buf, "view point (%.6g %.6g %.6g): ", |
106 |
ourview.vp[0], ourview.vp[1], ourview.vp[2]); |
107 |
(*dev->comout)(buf); |
108 |
(*dev->comin)(buf, NULL); |
109 |
if (buf[0] == CTRL('C')) return; |
110 |
if (sscanvec(buf, nv.vp)) |
111 |
change++; |
112 |
sprintf(buf, "view direction (%.6g %.6g %.6g): ", |
113 |
ourview.vdir[0]*ourview.vdist, |
114 |
ourview.vdir[1]*ourview.vdist, |
115 |
ourview.vdir[2]*ourview.vdist); |
116 |
(*dev->comout)(buf); |
117 |
(*dev->comin)(buf, NULL); |
118 |
if (buf[0] == CTRL('C')) return; |
119 |
if (sscanvec(buf, nv.vdir)) { |
120 |
nv.vdist = 1.; |
121 |
change++; |
122 |
} |
123 |
sprintf(buf, "view up (%.6g %.6g %.6g): ", |
124 |
ourview.vup[0], ourview.vup[1], ourview.vup[2]); |
125 |
(*dev->comout)(buf); |
126 |
(*dev->comin)(buf, NULL); |
127 |
if (buf[0] == CTRL('C')) return; |
128 |
if (sscanvec(buf, nv.vup)) |
129 |
change++; |
130 |
sprintf(buf, "view horiz and vert size (%.6g %.6g): ", |
131 |
ourview.horiz, ourview.vert); |
132 |
(*dev->comout)(buf); |
133 |
(*dev->comin)(buf, NULL); |
134 |
if (buf[0] == CTRL('C')) return; |
135 |
if (sscanf(buf, "%lf %lf", &nv.horiz, &nv.vert) == 2) |
136 |
change++; |
137 |
sprintf(buf, "fore and aft clipping plane (%.6g %.6g): ", |
138 |
ourview.vfore, ourview.vaft); |
139 |
(*dev->comout)(buf); |
140 |
(*dev->comin)(buf, NULL); |
141 |
if (buf[0] == CTRL('C')) return; |
142 |
if (sscanf(buf, "%lf %lf", &nv.vfore, &nv.vaft) == 2) |
143 |
change++; |
144 |
sprintf(buf, "view shift and lift (%.6g %.6g): ", |
145 |
ourview.hoff, ourview.voff); |
146 |
(*dev->comout)(buf); |
147 |
(*dev->comin)(buf, NULL); |
148 |
if (buf[0] == CTRL('C')) return; |
149 |
if (sscanf(buf, "%lf %lf", &nv.hoff, &nv.voff) == 2) |
150 |
change++; |
151 |
if (change) |
152 |
newview(&nv); |
153 |
} |
154 |
|
155 |
|
156 |
void |
157 |
lastview( /* return to a previous view */ |
158 |
char *s |
159 |
) |
160 |
{ |
161 |
char buf[128]; |
162 |
char *fname; |
163 |
int success; |
164 |
VIEW nv; |
165 |
|
166 |
if (sscanf(s, "%s", buf) == 1) { /* get parameters from a file */ |
167 |
nv = stdview; |
168 |
if ((fname = getpath(buf, "", R_OK)) == NULL || |
169 |
(success = viewfile(fname, &nv, NULL)) == -1) { |
170 |
sprintf(errmsg, "cannot open \"%s\"", buf); |
171 |
error(COMMAND, errmsg); |
172 |
return; |
173 |
} |
174 |
if (!success) |
175 |
error(COMMAND, "wrong file format"); |
176 |
else |
177 |
newview(&nv); |
178 |
return; |
179 |
} |
180 |
if (oldview.type == 0) { /* no old view! */ |
181 |
error(COMMAND, "no previous view"); |
182 |
return; |
183 |
} |
184 |
nv = ourview; |
185 |
ourview = oldview; |
186 |
oldview = nv; |
187 |
newimage(NULL); |
188 |
} |
189 |
|
190 |
|
191 |
void |
192 |
saveview( /* save view to rad file */ |
193 |
char *s |
194 |
) |
195 |
{ |
196 |
char view[64]; |
197 |
char *fname; |
198 |
FILE *fp; |
199 |
|
200 |
if (*atos(view, sizeof(view), s)) { |
201 |
if (isint(view)) { |
202 |
error(COMMAND, "cannot write view by number"); |
203 |
return; |
204 |
} |
205 |
s = sskip(s); |
206 |
} |
207 |
while (isspace(*s)) |
208 |
s++; |
209 |
if (*s) |
210 |
atos(rifname, sizeof(rifname), s); |
211 |
else if (rifname[0] == '\0') { |
212 |
error(COMMAND, "no previous rad file"); |
213 |
return; |
214 |
} |
215 |
if ((fname = getpath(rifname, NULL, 0)) == NULL || |
216 |
(fp = fopen(fname, "a")) == NULL) { |
217 |
sprintf(errmsg, "cannot open \"%s\"", rifname); |
218 |
error(COMMAND, errmsg); |
219 |
return; |
220 |
} |
221 |
fputs("view= ", fp); |
222 |
fputs(view, fp); |
223 |
fprintview(&ourview, fp); |
224 |
putc('\n', fp); |
225 |
fclose(fp); |
226 |
} |
227 |
|
228 |
|
229 |
void |
230 |
loadview( /* load view from rad file */ |
231 |
char *s |
232 |
) |
233 |
{ |
234 |
char buf[512]; |
235 |
char *fname; |
236 |
FILE *fp; |
237 |
VIEW nv; |
238 |
|
239 |
strcpy(buf, "rad -n -s -V -v "); |
240 |
if (sscanf(s, "%s", buf+strlen(buf)) == 1) |
241 |
s = sskip(s); |
242 |
else |
243 |
strcat(buf, "1"); |
244 |
if (*s) |
245 |
atos(rifname, sizeof(rifname), s); |
246 |
else if (rifname[0] == '\0') { |
247 |
error(COMMAND, "no previous rad file"); |
248 |
return; |
249 |
} |
250 |
if ((fname = getpath(rifname, "", R_OK)) == NULL) { |
251 |
sprintf(errmsg, "cannot access \"%s\"", rifname); |
252 |
error(COMMAND, errmsg); |
253 |
return; |
254 |
} |
255 |
sprintf(buf+strlen(buf), " %s", fname); |
256 |
if ((fp = popen(buf, "r")) == NULL) { |
257 |
error(COMMAND, "cannot run rad"); |
258 |
return; |
259 |
} |
260 |
buf[0] = '\0'; |
261 |
fgets(buf, sizeof(buf), fp); |
262 |
pclose(fp); |
263 |
nv = stdview; |
264 |
if (!sscanview(&nv, buf)) { |
265 |
error(COMMAND, "rad error -- no such view?"); |
266 |
return; |
267 |
} |
268 |
newview(&nv); |
269 |
} |
270 |
|
271 |
|
272 |
void |
273 |
getaim( /* aim camera */ |
274 |
char *s |
275 |
) |
276 |
{ |
277 |
VIEW nv = ourview; |
278 |
double zfact; |
279 |
|
280 |
if (getinterest(s, 1, nv.vdir, &zfact) < 0) |
281 |
return; |
282 |
zoomview(&nv, zfact); |
283 |
newview(&nv); |
284 |
} |
285 |
|
286 |
|
287 |
void |
288 |
getfocus( /* set focus distance */ |
289 |
char *s |
290 |
) |
291 |
{ |
292 |
char buf[64]; |
293 |
double dist; |
294 |
|
295 |
if (sscanf(s, "%lf", &dist) < 1) { |
296 |
int x, y; |
297 |
RAY thisray; |
298 |
if (dev->getcur == NULL) |
299 |
return; |
300 |
(*dev->comout)("Pick focus point\n"); |
301 |
if ((*dev->getcur)(&x, &y) == ABORT) |
302 |
return; |
303 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
304 |
&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
305 |
error(COMMAND, "not on image"); |
306 |
return; |
307 |
} |
308 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
309 |
if (!localhit(&thisray, &thescene)) { |
310 |
error(COMMAND, "not a local object"); |
311 |
return; |
312 |
} |
313 |
dist = thisray.rot; |
314 |
} else if (dist <= .0) { |
315 |
error(COMMAND, "focus distance must be positive"); |
316 |
return; |
317 |
} |
318 |
ourview.vdist = dist; |
319 |
sprintf(buf, "Focus distance set to %f\n", dist); |
320 |
(*dev->comout)(buf); |
321 |
} |
322 |
|
323 |
|
324 |
void |
325 |
getmove( /* move camera */ |
326 |
char *s |
327 |
) |
328 |
{ |
329 |
FVECT vc; |
330 |
double mag; |
331 |
|
332 |
if (getinterest(s, 0, vc, &mag) < 0) |
333 |
return; |
334 |
moveview(0.0, 0.0, mag, vc); |
335 |
} |
336 |
|
337 |
|
338 |
void |
339 |
getrotate( /* rotate camera */ |
340 |
char *s |
341 |
) |
342 |
{ |
343 |
VIEW nv = ourview; |
344 |
FVECT v1; |
345 |
double angle, elev, zfact; |
346 |
|
347 |
elev = 0.0; zfact = 1.0; |
348 |
if (sscanf(s, "%lf %lf %lf", &angle, &elev, &zfact) < 1) { |
349 |
error(COMMAND, "missing angle"); |
350 |
return; |
351 |
} |
352 |
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
353 |
if (elev != 0.0) { |
354 |
fcross(v1, nv.vdir, ourview.vup); |
355 |
normalize(v1); |
356 |
spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.)); |
357 |
} |
358 |
zoomview(&nv, zfact); |
359 |
newview(&nv); |
360 |
} |
361 |
|
362 |
|
363 |
void |
364 |
getpivot( /* pivot viewpoint */ |
365 |
char *s |
366 |
) |
367 |
{ |
368 |
FVECT vc; |
369 |
double angle, elev, mag; |
370 |
|
371 |
elev = 0.0; |
372 |
if (sscanf(s, "%lf %lf", &angle, &elev) < 1) { |
373 |
error(COMMAND, "missing angle"); |
374 |
return; |
375 |
} |
376 |
if (getinterest(sskip2(s,2), 0, vc, &mag) < 0) |
377 |
return; |
378 |
moveview(angle, elev, mag, vc); |
379 |
} |
380 |
|
381 |
|
382 |
void |
383 |
getexposure( /* get new exposure */ |
384 |
char *s |
385 |
) |
386 |
{ |
387 |
char buf[128]; |
388 |
char *cp; |
389 |
int x, y; |
390 |
PNODE *p = &ptrunk; |
391 |
int adapt = 0; |
392 |
double e = 1.0; |
393 |
|
394 |
for (cp = s; isspace(*cp); cp++) |
395 |
; |
396 |
if (*cp == '@') { |
397 |
adapt++; |
398 |
while (isspace(*++cp)) |
399 |
; |
400 |
} |
401 |
if (*cp == '\0') { /* normalize to point */ |
402 |
if (dev->getcur == NULL) |
403 |
return; |
404 |
(*dev->comout)("Pick point for exposure\n"); |
405 |
if ((*dev->getcur)(&x, &y) == ABORT) |
406 |
return; |
407 |
p = findrect(x, y, &ptrunk, -1); |
408 |
} else { |
409 |
if (*cp == '=') { /* absolute setting */ |
410 |
p = NULL; |
411 |
e = 1.0/exposure; |
412 |
for (cp++; isspace(*cp); cp++) |
413 |
; |
414 |
if (*cp == '\0') { /* interactive */ |
415 |
sprintf(buf, "exposure (%f): ", exposure); |
416 |
(*dev->comout)(buf); |
417 |
(*dev->comin)(buf, NULL); |
418 |
for (cp = buf; isspace(*cp); cp++) |
419 |
; |
420 |
if (*cp == '\0') |
421 |
return; |
422 |
} |
423 |
} |
424 |
if (*cp == '+' || *cp == '-') /* f-stops */ |
425 |
e *= pow(2.0, atof(cp)); |
426 |
else /* multiplier */ |
427 |
e *= atof(cp); |
428 |
} |
429 |
if (p != NULL) { /* relative setting */ |
430 |
compavg(p); |
431 |
if (bright(p->v) < 1e-15) { |
432 |
error(COMMAND, "cannot normalize to zero"); |
433 |
return; |
434 |
} |
435 |
if (adapt) |
436 |
e *= 106./pow(1.219+pow(luminance(p->v)/exposure,.4),2.5)/exposure; |
437 |
else |
438 |
e *= 0.5 / bright(p->v); |
439 |
} |
440 |
if (e <= FTINY || fabs(1.0 - e) <= FTINY) |
441 |
return; |
442 |
scalepict(&ptrunk, e); |
443 |
exposure *= e; |
444 |
redraw(); |
445 |
} |
446 |
|
447 |
typedef union {int i; double d; COLOR C;} *MyUptr; |
448 |
#define FEQ(x,y) (fabs((x)-(y)) <= FTINY) |
449 |
|
450 |
int |
451 |
getparam( /* get variable from user */ |
452 |
char *str, |
453 |
char *dsc, |
454 |
int typ, |
455 |
void *p |
456 |
) |
457 |
{ |
458 |
MyUptr ptr = (MyUptr)p; |
459 |
int i0; |
460 |
double d0, d1, d2; |
461 |
char buf[48]; |
462 |
|
463 |
switch (typ) { |
464 |
case 'i': /* integer */ |
465 |
if (sscanf(str, "%d", &i0) != 1) { |
466 |
(*dev->comout)(dsc); |
467 |
sprintf(buf, " (%d): ", ptr->i); |
468 |
(*dev->comout)(buf); |
469 |
(*dev->comin)(buf, NULL); |
470 |
if (sscanf(buf, "%d", &i0) != 1) |
471 |
return(0); |
472 |
} |
473 |
if (ptr->i == i0) |
474 |
return(0); |
475 |
ptr->i = i0; |
476 |
break; |
477 |
case 'r': /* real */ |
478 |
if (sscanf(str, "%lf", &d0) != 1) { |
479 |
(*dev->comout)(dsc); |
480 |
sprintf(buf, " (%.6g): ", ptr->d); |
481 |
(*dev->comout)(buf); |
482 |
(*dev->comin)(buf, NULL); |
483 |
if (sscanf(buf, "%lf", &d0) != 1) |
484 |
return(0); |
485 |
} |
486 |
if (FEQ(ptr->d, d0)) |
487 |
return(0); |
488 |
ptr->d = d0; |
489 |
break; |
490 |
case 'b': /* boolean */ |
491 |
if (sscanf(str, "%1s", buf) != 1) { |
492 |
(*dev->comout)(dsc); |
493 |
sprintf(buf, "? (%c): ", ptr->i ? 'y' : 'n'); |
494 |
(*dev->comout)(buf); |
495 |
(*dev->comin)(buf, NULL); |
496 |
if (buf[0] == '\0') |
497 |
return(0); |
498 |
} |
499 |
if (strchr("yY+1tTnN-0fF", buf[0]) == NULL) |
500 |
return(0); |
501 |
i0 = strchr("yY+1tT", buf[0]) != NULL; |
502 |
if (ptr->i == i0) |
503 |
return(0); |
504 |
ptr->i = i0; |
505 |
break; |
506 |
case 'C': /* color */ |
507 |
if (sscanf(str, "%lf %lf %lf", &d0, &d1, &d2) != 3) { |
508 |
(*dev->comout)(dsc); |
509 |
sprintf(buf, " (%.6g %.6g %.6g): ", |
510 |
colval(ptr->C,RED), |
511 |
colval(ptr->C,GRN), |
512 |
colval(ptr->C,BLU)); |
513 |
(*dev->comout)(buf); |
514 |
(*dev->comin)(buf, NULL); |
515 |
if (sscanf(buf, "%lf %lf %lf", &d0, &d1, &d2) != 3) |
516 |
return(0); |
517 |
} |
518 |
if (FEQ(colval(ptr->C,RED), d0) && |
519 |
FEQ(colval(ptr->C,GRN), d1) && |
520 |
FEQ(colval(ptr->C,BLU), d2)) |
521 |
return(0); |
522 |
setcolor(ptr->C, d0, d1, d2); |
523 |
break; |
524 |
default: |
525 |
return(0); /* shouldn't happen */ |
526 |
} |
527 |
newparam++; |
528 |
return(1); |
529 |
} |
530 |
|
531 |
|
532 |
void |
533 |
setparam( /* get/set program parameter */ |
534 |
char *s |
535 |
) |
536 |
{ |
537 |
char buf[128]; |
538 |
|
539 |
if (s[0] == '\0') { |
540 |
(*dev->comout)( |
541 |
"aa ab ad ar as av aw b bv dc dv dj ds dt i lr lw me ma mg ms ps pt sj st u: "); |
542 |
(*dev->comin)(buf, NULL); |
543 |
s = buf; |
544 |
} |
545 |
switch (s[0]) { |
546 |
case 'u': /* uncorrelated sampling */ |
547 |
getparam(s+1, "uncorrelated sampling", 'b', |
548 |
(void *)&rand_samp); |
549 |
break; |
550 |
case 'l': /* limit */ |
551 |
switch (s[1]) { |
552 |
case 'w': /* weight */ |
553 |
getparam(s+2, "limit weight", 'r', |
554 |
(void *)&minweight); |
555 |
break; |
556 |
case 'r': /* reflection */ |
557 |
getparam(s+2, "limit reflection", 'i', |
558 |
(void *)&maxdepth); |
559 |
break; |
560 |
default: |
561 |
goto badparam; |
562 |
} |
563 |
break; |
564 |
case 'd': /* direct */ |
565 |
switch (s[1]) { |
566 |
case 'j': /* jitter */ |
567 |
getparam(s+2, "direct jitter", 'r', |
568 |
(void *)&dstrsrc); |
569 |
break; |
570 |
case 'c': /* certainty */ |
571 |
getparam(s+2, "direct certainty", 'r', |
572 |
(void *)&shadcert); |
573 |
break; |
574 |
case 't': /* threshold */ |
575 |
getparam(s+2, "direct threshold", 'r', |
576 |
(void *)&shadthresh); |
577 |
break; |
578 |
case 'v': /* visibility */ |
579 |
getparam(s+2, "direct visibility", 'b', |
580 |
(void *)&directvis); |
581 |
break; |
582 |
case 's': /* sampling */ |
583 |
getparam(s+2, "direct sampling", 'r', |
584 |
(void *)&srcsizerat); |
585 |
break; |
586 |
default: |
587 |
goto badparam; |
588 |
} |
589 |
break; |
590 |
case 'b': /* back faces or black and white */ |
591 |
switch (s[1]) { |
592 |
case 'v': /* back face visibility */ |
593 |
getparam(s+2, "back face visibility", 'b', |
594 |
(void *)&backvis); |
595 |
break; |
596 |
case '\0': /* black and white */ |
597 |
case ' ': |
598 |
case 'y': case 'Y': case 't': case 'T': case '1': case '+': |
599 |
case 'n': case 'N': case 'f': case 'F': case '0': case '-': |
600 |
getparam(s+1, "black and white", 'b', |
601 |
(void *)&greyscale); |
602 |
break; |
603 |
default: |
604 |
goto badparam; |
605 |
} |
606 |
break; |
607 |
case 'i': /* irradiance */ |
608 |
getparam(s+1, "irradiance", 'b', |
609 |
(void *)&do_irrad); |
610 |
break; |
611 |
case 'a': /* ambient */ |
612 |
switch (s[1]) { |
613 |
case 'v': /* value */ |
614 |
getparam(s+2, "ambient value", 'C', |
615 |
(void *)ambval); |
616 |
break; |
617 |
case 'w': /* weight */ |
618 |
getparam(s+2, "ambient value weight", 'i', |
619 |
(void *)&ambvwt); |
620 |
break; |
621 |
case 'a': /* accuracy */ |
622 |
if (getparam(s+2, "ambient accuracy", 'r', |
623 |
(void *)&ambacc)) |
624 |
setambacc(ambacc); |
625 |
break; |
626 |
case 'd': /* divisions */ |
627 |
getparam(s+2, "ambient divisions", 'i', |
628 |
(void *)&ambdiv); |
629 |
break; |
630 |
case 's': /* samples */ |
631 |
getparam(s+2, "ambient super-samples", 'i', |
632 |
(void *)&ambssamp); |
633 |
break; |
634 |
case 'b': /* bounces */ |
635 |
getparam(s+2, "ambient bounces", 'i', |
636 |
(void *)&ambounce); |
637 |
break; |
638 |
case 'r': |
639 |
if (getparam(s+2, "ambient resolution", 'i', |
640 |
(void *)&ambres)) |
641 |
setambres(ambres); |
642 |
break; |
643 |
default: |
644 |
goto badparam; |
645 |
} |
646 |
break; |
647 |
case 'm': /* medium */ |
648 |
switch (s[1]) { |
649 |
case 'e': /* extinction coefficient */ |
650 |
getparam(s+2, "extinction coefficient", 'C', |
651 |
(void *)cextinction); |
652 |
break; |
653 |
case 'a': /* scattering albedo */ |
654 |
getparam(s+2, "scattering albedo", 'C', |
655 |
(void *)salbedo); |
656 |
break; |
657 |
case 'g': /* scattering eccentricity */ |
658 |
getparam(s+2, "scattering eccentricity", 'r', |
659 |
(void *)&seccg); |
660 |
break; |
661 |
case 's': /* sampling distance */ |
662 |
getparam(s+2, "mist sampling distance", 'r', |
663 |
(void *)&ssampdist); |
664 |
break; |
665 |
default: |
666 |
goto badparam; |
667 |
} |
668 |
break; |
669 |
case 'p': /* pixel */ |
670 |
switch (s[1]) { |
671 |
case 's': /* sample */ |
672 |
if (getparam(s+2, "pixel sample", 'i', |
673 |
(void *)&psample)) |
674 |
pdepth = 0; |
675 |
break; |
676 |
case 't': /* threshold */ |
677 |
if (getparam(s+2, "pixel threshold", 'r', |
678 |
(void *)&maxdiff)) |
679 |
pdepth = 0; |
680 |
break; |
681 |
default: |
682 |
goto badparam; |
683 |
} |
684 |
break; |
685 |
case 's': /* specular */ |
686 |
switch (s[1]) { |
687 |
case 'j': /* jitter */ |
688 |
getparam(s+2, "specular jitter", 'r', |
689 |
(void *)&specjitter); |
690 |
break; |
691 |
case 't': /* threshold */ |
692 |
getparam(s+2, "specular threshold", 'r', |
693 |
(void *)&specthresh); |
694 |
break; |
695 |
default: |
696 |
goto badparam; |
697 |
} |
698 |
break; |
699 |
case '\0': /* nothing */ |
700 |
break; |
701 |
default:; |
702 |
badparam: |
703 |
*sskip(s) = '\0'; |
704 |
sprintf(errmsg, "%s: unknown variable", s); |
705 |
error(COMMAND, errmsg); |
706 |
break; |
707 |
} |
708 |
} |
709 |
|
710 |
|
711 |
void |
712 |
traceray( /* trace a single ray */ |
713 |
char *s |
714 |
) |
715 |
{ |
716 |
char buf[128]; |
717 |
int x, y; |
718 |
OBJREC *ino; |
719 |
RAY thisray; |
720 |
|
721 |
thisray.rmax = 0.0; |
722 |
|
723 |
if (!sscanvec(s, thisray.rorg) || |
724 |
!sscanvec(sskip2(s,3), thisray.rdir)) { |
725 |
|
726 |
if (dev->getcur == NULL) |
727 |
return; |
728 |
(*dev->comout)("Pick ray\n"); |
729 |
if ((*dev->getcur)(&x, &y) == ABORT) |
730 |
return; |
731 |
|
732 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
733 |
&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
734 |
error(COMMAND, "not on image"); |
735 |
return; |
736 |
} |
737 |
|
738 |
} else if (normalize(thisray.rdir) == 0.0) { |
739 |
error(COMMAND, "zero ray direction"); |
740 |
return; |
741 |
} |
742 |
|
743 |
ray_trace(&thisray); |
744 |
|
745 |
if (thisray.ro == NULL) |
746 |
(*dev->comout)("ray hit nothing"); |
747 |
else { |
748 |
OBJREC *mat = NULL; |
749 |
OBJREC *mod = NULL; |
750 |
char matspec[256]; |
751 |
matspec[0] = '\0'; |
752 |
if (thisray.ro->omod != OVOID) { |
753 |
mod = objptr(thisray.ro->omod); |
754 |
mat = findmaterial(mod); |
755 |
} |
756 |
if (thisray.rod < 0.0) |
757 |
strcpy(matspec, "back of "); |
758 |
if (mod != NULL) { |
759 |
strcat(matspec, mod->oname); |
760 |
if (mat != mod && mat != NULL) |
761 |
sprintf(matspec+strlen(matspec), |
762 |
" (%s)", mat->oname); |
763 |
} else |
764 |
strcat(matspec, VOIDID); |
765 |
sprintf(buf, "ray hit %s %s \"%s\"", matspec, |
766 |
ofun[thisray.ro->otype].funame, |
767 |
thisray.ro->oname); |
768 |
if ((ino = objptr(thisray.robj)) != thisray.ro) |
769 |
sprintf(buf+strlen(buf), " in %s \"%s\"", |
770 |
ofun[ino->otype].funame, ino->oname); |
771 |
(*dev->comout)(buf); |
772 |
(*dev->comin)(buf, NULL); |
773 |
if (thisray.rot >= FHUGE) |
774 |
(*dev->comout)("at infinity"); |
775 |
else { |
776 |
sprintf(buf, "at (%.6g %.6g %.6g) (%.6g)", |
777 |
thisray.rop[0], thisray.rop[1], |
778 |
thisray.rop[2], thisray.rt); |
779 |
(*dev->comout)(buf); |
780 |
} |
781 |
(*dev->comin)(buf, NULL); |
782 |
sprintf(buf, "value (%.5g %.5g %.5g) (%.3gL)", |
783 |
colval(thisray.rcol,RED), |
784 |
colval(thisray.rcol,GRN), |
785 |
colval(thisray.rcol,BLU), |
786 |
luminance(thisray.rcol)); |
787 |
(*dev->comout)(buf); |
788 |
} |
789 |
(*dev->comin)(buf, NULL); |
790 |
} |
791 |
|
792 |
|
793 |
void |
794 |
writepict( /* write the picture to a file */ |
795 |
char *s |
796 |
) |
797 |
{ |
798 |
static char buf[128]; |
799 |
char *fname; |
800 |
FILE *fp; |
801 |
COLR *scanline; |
802 |
int y; |
803 |
|
804 |
while (isspace(*s)) |
805 |
s++; |
806 |
if (*s) |
807 |
atos(buf, sizeof(buf), s); |
808 |
else if (buf[0] == '\0') { |
809 |
error(COMMAND, "no file"); |
810 |
return; |
811 |
} |
812 |
if ((fname = getpath(buf, NULL, 0)) == NULL || |
813 |
(fp = fopen(fname, "w")) == NULL) { |
814 |
sprintf(errmsg, "cannot open \"%s\"", buf); |
815 |
error(COMMAND, errmsg); |
816 |
return; |
817 |
} |
818 |
SET_FILE_BINARY(fp); |
819 |
(*dev->comout)("writing \""); |
820 |
(*dev->comout)(fname); |
821 |
(*dev->comout)("\"...\n"); |
822 |
/* write header */ |
823 |
newheader("RADIANCE", fp); |
824 |
fputs(progname, fp); |
825 |
fprintview(&ourview, fp); |
826 |
if (octname != NULL) |
827 |
fprintf(fp, " %s\n", octname); |
828 |
else |
829 |
putc('\n', fp); |
830 |
fprintf(fp, "SOFTWARE= %s\n", VersionID); |
831 |
fputnow(fp); |
832 |
if (exposure != 1.0) |
833 |
fputexpos(exposure, fp); |
834 |
if (dev->pixaspect != 1.0) |
835 |
fputaspect(dev->pixaspect, fp); |
836 |
fputformat(COLRFMT, fp); |
837 |
putc('\n', fp); |
838 |
fprtresolu(hresolu, vresolu, fp); |
839 |
|
840 |
scanline = (COLR *)malloc(hresolu*sizeof(COLR)); |
841 |
if (scanline == NULL) { |
842 |
error(COMMAND, "not enough memory!"); |
843 |
fclose(fp); |
844 |
unlink(fname); |
845 |
return; |
846 |
} |
847 |
for (y = vresolu-1; y >= 0; y--) { |
848 |
getpictcolrs(y, scanline, &ptrunk, hresolu, vresolu); |
849 |
if (fwritecolrs(scanline, hresolu, fp) < 0) |
850 |
break; |
851 |
} |
852 |
free((void *)scanline); |
853 |
if (fclose(fp) < 0) |
854 |
error(COMMAND, "write error"); |
855 |
} |