1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rv2.c,v 2.40 2003/06/05 19:29:34 schorsch 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 "otypes.h" |
18 |
#include "rpaint.h" |
19 |
|
20 |
extern int psample; /* pixel sample size */ |
21 |
extern double maxdiff; /* max. sample difference */ |
22 |
|
23 |
#define CTRL(c) ((c)-'@') |
24 |
|
25 |
#ifdef SMLFLT |
26 |
#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
27 |
#else |
28 |
#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3) |
29 |
#endif |
30 |
|
31 |
extern char rifname[128]; /* rad input file name */ |
32 |
|
33 |
extern char *progname; |
34 |
extern char *octname; |
35 |
|
36 |
|
37 |
void |
38 |
getframe(s) /* get a new frame */ |
39 |
char *s; |
40 |
{ |
41 |
if (getrect(s, &pframe) < 0) |
42 |
return; |
43 |
pdepth = 0; |
44 |
} |
45 |
|
46 |
|
47 |
void |
48 |
getrepaint(s) /* get area and repaint */ |
49 |
char *s; |
50 |
{ |
51 |
RECT box; |
52 |
|
53 |
if (getrect(s, &box) < 0) |
54 |
return; |
55 |
paintrect(&ptrunk, 0, 0, hresolu, vresolu, &box); |
56 |
} |
57 |
|
58 |
|
59 |
void |
60 |
getview(s) /* get/show view parameters */ |
61 |
char *s; |
62 |
{ |
63 |
FILE *fp; |
64 |
char buf[128]; |
65 |
char *fname; |
66 |
int change = 0; |
67 |
VIEW nv; |
68 |
|
69 |
while (isspace(*s)) |
70 |
s++; |
71 |
if (*s == '-') { /* command line parameters */ |
72 |
copystruct(&nv, &ourview); |
73 |
if (sscanview(&nv, s)) |
74 |
newview(&nv); |
75 |
else |
76 |
error(COMMAND, "bad view option(s)"); |
77 |
return; |
78 |
} |
79 |
if (sscanf(s, "%s", buf) == 1) { /* write parameters to a file */ |
80 |
if ((fname = getpath(buf, NULL, 0)) == NULL || |
81 |
(fp = fopen(fname, "a")) == NULL) { |
82 |
sprintf(errmsg, "cannot open \"%s\"", buf); |
83 |
error(COMMAND, errmsg); |
84 |
return; |
85 |
} |
86 |
fputs(progname, fp); |
87 |
fprintview(&ourview, fp); |
88 |
fputs(sskip(s), fp); |
89 |
putc('\n', fp); |
90 |
fclose(fp); |
91 |
return; |
92 |
} |
93 |
sprintf(buf, "view type (%c): ", ourview.type); |
94 |
(*dev->comout)(buf); |
95 |
(*dev->comin)(buf, NULL); |
96 |
if (buf[0] == CTRL('C')) return; |
97 |
if (buf[0] && buf[0] != ourview.type) { |
98 |
nv.type = buf[0]; |
99 |
change++; |
100 |
} else |
101 |
nv.type = ourview.type; |
102 |
sprintf(buf, "view point (%.6g %.6g %.6g): ", |
103 |
ourview.vp[0], ourview.vp[1], ourview.vp[2]); |
104 |
(*dev->comout)(buf); |
105 |
(*dev->comin)(buf, NULL); |
106 |
if (buf[0] == CTRL('C')) return; |
107 |
if (sscanvec(buf, nv.vp)) |
108 |
change++; |
109 |
else |
110 |
VCOPY(nv.vp, ourview.vp); |
111 |
sprintf(buf, "view direction (%.6g %.6g %.6g): ", |
112 |
ourview.vdir[0], ourview.vdir[1], ourview.vdir[2]); |
113 |
(*dev->comout)(buf); |
114 |
(*dev->comin)(buf, NULL); |
115 |
if (buf[0] == CTRL('C')) return; |
116 |
if (sscanvec(buf, nv.vdir)) |
117 |
change++; |
118 |
else |
119 |
VCOPY(nv.vdir, ourview.vdir); |
120 |
sprintf(buf, "view up (%.6g %.6g %.6g): ", |
121 |
ourview.vup[0], ourview.vup[1], ourview.vup[2]); |
122 |
(*dev->comout)(buf); |
123 |
(*dev->comin)(buf, NULL); |
124 |
if (buf[0] == CTRL('C')) return; |
125 |
if (sscanvec(buf, nv.vup)) |
126 |
change++; |
127 |
else |
128 |
VCOPY(nv.vup, ourview.vup); |
129 |
sprintf(buf, "view horiz and vert size (%.6g %.6g): ", |
130 |
ourview.horiz, ourview.vert); |
131 |
(*dev->comout)(buf); |
132 |
(*dev->comin)(buf, NULL); |
133 |
if (buf[0] == CTRL('C')) return; |
134 |
if (sscanf(buf, "%lf %lf", &nv.horiz, &nv.vert) == 2) |
135 |
change++; |
136 |
else { |
137 |
nv.horiz = ourview.horiz; nv.vert = ourview.vert; |
138 |
} |
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 |
else { |
147 |
nv.vfore = ourview.vfore; nv.vaft = ourview.vaft; |
148 |
} |
149 |
sprintf(buf, "view shift and lift (%.6g %.6g): ", |
150 |
ourview.hoff, ourview.voff); |
151 |
(*dev->comout)(buf); |
152 |
(*dev->comin)(buf, NULL); |
153 |
if (buf[0] == CTRL('C')) return; |
154 |
if (sscanf(buf, "%lf %lf", &nv.hoff, &nv.voff) == 2) |
155 |
change++; |
156 |
else { |
157 |
nv.hoff = ourview.hoff; nv.voff = ourview.voff; |
158 |
} |
159 |
if (change) |
160 |
newview(&nv); |
161 |
} |
162 |
|
163 |
|
164 |
void |
165 |
lastview(s) /* return to a previous view */ |
166 |
char *s; |
167 |
{ |
168 |
char buf[128]; |
169 |
char *fname; |
170 |
int success; |
171 |
VIEW nv; |
172 |
|
173 |
if (sscanf(s, "%s", buf) == 1) { /* get parameters from a file */ |
174 |
copystruct(&nv, &stdview); |
175 |
if ((fname = getpath(buf, "", R_OK)) == NULL || |
176 |
(success = viewfile(fname, &nv, NULL)) == -1) { |
177 |
sprintf(errmsg, "cannot open \"%s\"", buf); |
178 |
error(COMMAND, errmsg); |
179 |
return; |
180 |
} |
181 |
if (!success) |
182 |
error(COMMAND, "wrong file format"); |
183 |
else |
184 |
newview(&nv); |
185 |
return; |
186 |
} |
187 |
if (oldview.type == 0) { /* no old view! */ |
188 |
error(COMMAND, "no previous view"); |
189 |
return; |
190 |
} |
191 |
copystruct(&nv, &ourview); |
192 |
copystruct(&ourview, &oldview); |
193 |
copystruct(&oldview, &nv); |
194 |
newimage(); |
195 |
} |
196 |
|
197 |
|
198 |
void |
199 |
saveview(s) /* save view to rad file */ |
200 |
char *s; |
201 |
{ |
202 |
char view[64]; |
203 |
char *fname; |
204 |
FILE *fp; |
205 |
|
206 |
if (*atos(view, sizeof(view), s)) { |
207 |
if (isint(view)) { |
208 |
error(COMMAND, "cannot write view by number"); |
209 |
return; |
210 |
} |
211 |
s = sskip(s); |
212 |
} |
213 |
while (isspace(*s)) |
214 |
s++; |
215 |
if (*s) |
216 |
atos(rifname, sizeof(rifname), s); |
217 |
else if (rifname[0] == '\0') { |
218 |
error(COMMAND, "no previous rad file"); |
219 |
return; |
220 |
} |
221 |
if ((fname = getpath(rifname, NULL, 0)) == NULL || |
222 |
(fp = fopen(fname, "a")) == NULL) { |
223 |
sprintf(errmsg, "cannot open \"%s\"", rifname); |
224 |
error(COMMAND, errmsg); |
225 |
return; |
226 |
} |
227 |
fputs("view= ", fp); |
228 |
fputs(view, fp); |
229 |
fprintview(&ourview, fp); |
230 |
putc('\n', fp); |
231 |
fclose(fp); |
232 |
} |
233 |
|
234 |
|
235 |
void |
236 |
loadview(s) /* load view from rad file */ |
237 |
char *s; |
238 |
{ |
239 |
char buf[512]; |
240 |
char *fname; |
241 |
FILE *fp; |
242 |
VIEW nv; |
243 |
|
244 |
strcpy(buf, "rad -n -s -V -v "); |
245 |
if (sscanf(s, "%s", buf+strlen(buf)) == 1) |
246 |
s = sskip(s); |
247 |
else |
248 |
strcat(buf, "1"); |
249 |
if (*s) |
250 |
atos(rifname, sizeof(rifname), s); |
251 |
else if (rifname[0] == '\0') { |
252 |
error(COMMAND, "no previous rad file"); |
253 |
return; |
254 |
} |
255 |
if ((fname = getpath(rifname, "", R_OK)) == NULL) { |
256 |
sprintf(errmsg, "cannot access \"%s\"", rifname); |
257 |
error(COMMAND, errmsg); |
258 |
return; |
259 |
} |
260 |
sprintf(buf+strlen(buf), " %s", fname); |
261 |
if ((fp = popen(buf, "r")) == NULL) { |
262 |
error(COMMAND, "cannot run rad"); |
263 |
return; |
264 |
} |
265 |
buf[0] = '\0'; |
266 |
fgets(buf, sizeof(buf), fp); |
267 |
pclose(fp); |
268 |
copystruct(&nv, &stdview); |
269 |
if (!sscanview(&nv, buf)) { |
270 |
error(COMMAND, "rad error -- no such view?"); |
271 |
return; |
272 |
} |
273 |
newview(&nv); |
274 |
} |
275 |
|
276 |
|
277 |
void |
278 |
getaim(s) /* aim camera */ |
279 |
char *s; |
280 |
{ |
281 |
double zfact; |
282 |
VIEW nv; |
283 |
|
284 |
if (getinterest(s, 1, nv.vdir, &zfact) < 0) |
285 |
return; |
286 |
nv.type = ourview.type; |
287 |
VCOPY(nv.vp, ourview.vp); |
288 |
VCOPY(nv.vup, ourview.vup); |
289 |
nv.horiz = ourview.horiz; nv.vert = ourview.vert; |
290 |
nv.vfore = ourview.vfore; nv.vaft = ourview.vaft; |
291 |
nv.hoff = ourview.hoff; nv.voff = ourview.voff; |
292 |
zoomview(&nv, zfact); |
293 |
newview(&nv); |
294 |
} |
295 |
|
296 |
|
297 |
void |
298 |
getmove(s) /* move camera */ |
299 |
char *s; |
300 |
{ |
301 |
FVECT vc; |
302 |
double mag; |
303 |
|
304 |
if (getinterest(s, 0, vc, &mag) < 0) |
305 |
return; |
306 |
moveview(0.0, 0.0, mag, vc); |
307 |
} |
308 |
|
309 |
|
310 |
void |
311 |
getrotate(s) /* rotate camera */ |
312 |
char *s; |
313 |
{ |
314 |
VIEW nv; |
315 |
FVECT v1; |
316 |
double angle, elev, zfact; |
317 |
|
318 |
elev = 0.0; zfact = 1.0; |
319 |
if (sscanf(s, "%lf %lf %lf", &angle, &elev, &zfact) < 1) { |
320 |
error(COMMAND, "missing angle"); |
321 |
return; |
322 |
} |
323 |
nv.type = ourview.type; |
324 |
VCOPY(nv.vp, ourview.vp); |
325 |
VCOPY(nv.vup, ourview.vup); |
326 |
nv.hoff = ourview.hoff; nv.voff = ourview.voff; |
327 |
nv.vfore = ourview.vfore; nv.vaft = ourview.vaft; |
328 |
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
329 |
if (elev != 0.0) { |
330 |
fcross(v1, nv.vdir, ourview.vup); |
331 |
normalize(v1); |
332 |
spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.)); |
333 |
} |
334 |
nv.horiz = ourview.horiz; nv.vert = ourview.vert; |
335 |
zoomview(&nv, zfact); |
336 |
newview(&nv); |
337 |
} |
338 |
|
339 |
|
340 |
void |
341 |
getpivot(s) /* pivot viewpoint */ |
342 |
register char *s; |
343 |
{ |
344 |
FVECT vc; |
345 |
double angle, elev, mag; |
346 |
|
347 |
elev = 0.0; |
348 |
if (sscanf(s, "%lf %lf", &angle, &elev) < 1) { |
349 |
error(COMMAND, "missing angle"); |
350 |
return; |
351 |
} |
352 |
if (getinterest(sskip2(s,2), 0, vc, &mag) < 0) |
353 |
return; |
354 |
moveview(angle, elev, mag, vc); |
355 |
} |
356 |
|
357 |
|
358 |
void |
359 |
getexposure(s) /* get new exposure */ |
360 |
char *s; |
361 |
{ |
362 |
char buf[128]; |
363 |
register char *cp; |
364 |
RECT r; |
365 |
int x, y; |
366 |
register PNODE *p = &ptrunk; |
367 |
int adapt = 0; |
368 |
double e = 1.0; |
369 |
|
370 |
for (cp = s; isspace(*cp); cp++) |
371 |
; |
372 |
if (*cp == '@') { |
373 |
adapt++; |
374 |
while (isspace(*++cp)) |
375 |
; |
376 |
} |
377 |
if (*cp == '\0') { /* normalize to point */ |
378 |
if (dev->getcur == NULL) |
379 |
return; |
380 |
(*dev->comout)("Pick point for exposure\n"); |
381 |
if ((*dev->getcur)(&x, &y) == ABORT) |
382 |
return; |
383 |
r.l = r.d = 0; |
384 |
r.r = hresolu; r.u = vresolu; |
385 |
p = findrect(x, y, &ptrunk, &r, -1); |
386 |
} else { |
387 |
if (*cp == '=') { /* absolute setting */ |
388 |
p = NULL; |
389 |
e = 1.0/exposure; |
390 |
for (cp++; isspace(*cp); cp++) |
391 |
; |
392 |
if (*cp == '\0') { /* interactive */ |
393 |
sprintf(buf, "exposure (%f): ", exposure); |
394 |
(*dev->comout)(buf); |
395 |
(*dev->comin)(buf, NULL); |
396 |
for (cp = buf; isspace(*cp); cp++) |
397 |
; |
398 |
if (*cp == '\0') |
399 |
return; |
400 |
} |
401 |
} |
402 |
if (*cp == '+' || *cp == '-') /* f-stops */ |
403 |
e *= pow(2.0, atof(cp)); |
404 |
else /* multiplier */ |
405 |
e *= atof(cp); |
406 |
} |
407 |
if (p != NULL) { /* relative setting */ |
408 |
if (bright(p->v) < 1e-15) { |
409 |
error(COMMAND, "cannot normalize to zero"); |
410 |
return; |
411 |
} |
412 |
if (adapt) |
413 |
e *= 106./pow(1.219+pow(luminance(p->v)/exposure,.4),2.5)/exposure; |
414 |
else |
415 |
e *= 0.5 / bright(p->v); |
416 |
} |
417 |
if (e <= FTINY || fabs(1.0 - e) <= FTINY) |
418 |
return; |
419 |
scalepict(&ptrunk, e); |
420 |
exposure *= e; |
421 |
redraw(); |
422 |
} |
423 |
|
424 |
typedef union {int i; double d; COLOR C;} *MyUptr; |
425 |
|
426 |
int |
427 |
getparam(str, dsc, typ, p) /* get variable from user */ |
428 |
char *str, *dsc; |
429 |
int typ; |
430 |
void *p; |
431 |
{ |
432 |
register MyUptr ptr = (MyUptr)p; |
433 |
int i0; |
434 |
double d0, d1, d2; |
435 |
char buf[48]; |
436 |
|
437 |
switch (typ) { |
438 |
case 'i': /* integer */ |
439 |
if (sscanf(str, "%d", &i0) != 1) { |
440 |
(*dev->comout)(dsc); |
441 |
sprintf(buf, " (%d): ", ptr->i); |
442 |
(*dev->comout)(buf); |
443 |
(*dev->comin)(buf, NULL); |
444 |
if (sscanf(buf, "%d", &i0) != 1) |
445 |
return(0); |
446 |
} |
447 |
ptr->i = i0; |
448 |
return(1); |
449 |
case 'r': /* real */ |
450 |
if (sscanf(str, "%lf", &d0) != 1) { |
451 |
(*dev->comout)(dsc); |
452 |
sprintf(buf, " (%.6g): ", ptr->d); |
453 |
(*dev->comout)(buf); |
454 |
(*dev->comin)(buf, NULL); |
455 |
if (sscanf(buf, "%lf", &d0) != 1) |
456 |
return(0); |
457 |
} |
458 |
ptr->d = d0; |
459 |
return(1); |
460 |
case 'b': /* boolean */ |
461 |
if (sscanf(str, "%1s", buf) != 1) { |
462 |
(*dev->comout)(dsc); |
463 |
sprintf(buf, "? (%c): ", ptr->i ? 'y' : 'n'); |
464 |
(*dev->comout)(buf); |
465 |
(*dev->comin)(buf, NULL); |
466 |
if (buf[0] == '\0' || |
467 |
strchr("yY+1tTnN-0fF", buf[0]) == NULL) |
468 |
return(0); |
469 |
} |
470 |
ptr->i = strchr("yY+1tT", buf[0]) != NULL; |
471 |
return(1); |
472 |
case 'C': /* color */ |
473 |
if (sscanf(str, "%lf %lf %lf", &d0, &d1, &d2) != 3) { |
474 |
(*dev->comout)(dsc); |
475 |
sprintf(buf, " (%.6g %.6g %.6g): ", |
476 |
colval(ptr->C,RED), |
477 |
colval(ptr->C,GRN), |
478 |
colval(ptr->C,BLU)); |
479 |
(*dev->comout)(buf); |
480 |
(*dev->comin)(buf, NULL); |
481 |
if (sscanf(buf, "%lf %lf %lf", &d0, &d1, &d2) != 3) |
482 |
return(0); |
483 |
} |
484 |
setcolor(ptr->C, d0, d1, d2); |
485 |
return(1); |
486 |
} |
487 |
} |
488 |
|
489 |
|
490 |
void |
491 |
setparam(s) /* get/set program parameter */ |
492 |
register char *s; |
493 |
{ |
494 |
char buf[128]; |
495 |
|
496 |
if (s[0] == '\0') { |
497 |
(*dev->comout)( |
498 |
"aa ab ad ar as av aw b dc dv dj ds dt i lr lw me ma mg ms ps pt sj st bv: "); |
499 |
(*dev->comin)(buf, NULL); |
500 |
s = buf; |
501 |
} |
502 |
switch (s[0]) { |
503 |
case 'l': /* limit */ |
504 |
switch (s[1]) { |
505 |
case 'w': /* weight */ |
506 |
getparam(s+2, "limit weight", 'r', |
507 |
(void *)&minweight); |
508 |
break; |
509 |
case 'r': /* reflection */ |
510 |
getparam(s+2, "limit reflection", 'i', |
511 |
(void *)&maxdepth); |
512 |
break; |
513 |
default: |
514 |
goto badparam; |
515 |
} |
516 |
break; |
517 |
case 'd': /* direct */ |
518 |
switch (s[1]) { |
519 |
case 'j': /* jitter */ |
520 |
getparam(s+2, "direct jitter", 'r', |
521 |
(void *)&dstrsrc); |
522 |
break; |
523 |
case 'c': /* certainty */ |
524 |
getparam(s+2, "direct certainty", 'r', |
525 |
(void *)&shadcert); |
526 |
break; |
527 |
case 't': /* threshold */ |
528 |
getparam(s+2, "direct threshold", 'r', |
529 |
(void *)&shadthresh); |
530 |
break; |
531 |
case 'v': /* visibility */ |
532 |
getparam(s+2, "direct visibility", 'b', |
533 |
(void *)&directvis); |
534 |
break; |
535 |
case 's': /* sampling */ |
536 |
getparam(s+2, "direct sampling", 'r', |
537 |
(void *)&srcsizerat); |
538 |
break; |
539 |
default: |
540 |
goto badparam; |
541 |
} |
542 |
break; |
543 |
case 'b': /* back faces or black and white */ |
544 |
switch (s[1]) { |
545 |
case 'v': /* back face visibility */ |
546 |
getparam(s+2, "back face visibility", 'b', |
547 |
(void *)&backvis); |
548 |
break; |
549 |
case '\0': /* black and white */ |
550 |
case ' ': |
551 |
case 'y': case 'Y': case 't': case 'T': case '1': case '+': |
552 |
case 'n': case 'N': case 'f': case 'F': case '0': case '-': |
553 |
getparam(s+1, "black and white", 'b', |
554 |
(void *)&greyscale); |
555 |
break; |
556 |
default: |
557 |
goto badparam; |
558 |
} |
559 |
break; |
560 |
case 'i': /* irradiance */ |
561 |
getparam(s+1, "irradiance", 'b', |
562 |
(void *)&do_irrad); |
563 |
break; |
564 |
case 'a': /* ambient */ |
565 |
switch (s[1]) { |
566 |
case 'v': /* value */ |
567 |
getparam(s+2, "ambient value", 'C', |
568 |
(void *)ambval); |
569 |
break; |
570 |
case 'w': /* weight */ |
571 |
getparam(s+2, "ambient value weight", 'i', |
572 |
(void *)&ambvwt); |
573 |
break; |
574 |
case 'a': /* accuracy */ |
575 |
if (getparam(s+2, "ambient accuracy", 'r', |
576 |
(void *)&ambacc)) |
577 |
setambacc(ambacc); |
578 |
break; |
579 |
case 'd': /* divisions */ |
580 |
getparam(s+2, "ambient divisions", 'i', |
581 |
(void *)&ambdiv); |
582 |
break; |
583 |
case 's': /* samples */ |
584 |
getparam(s+2, "ambient super-samples", 'i', |
585 |
(void *)&ambssamp); |
586 |
break; |
587 |
case 'b': /* bounces */ |
588 |
getparam(s+2, "ambient bounces", 'i', |
589 |
(void *)&ambounce); |
590 |
break; |
591 |
case 'r': |
592 |
if (getparam(s+2, "ambient resolution", 'i', |
593 |
(void *)&ambres)) |
594 |
setambres(ambres); |
595 |
break; |
596 |
default: |
597 |
goto badparam; |
598 |
} |
599 |
break; |
600 |
case 'm': /* medium */ |
601 |
switch (s[1]) { |
602 |
case 'e': /* extinction coefficient */ |
603 |
getparam(s+2, "extinction coefficient", 'C', |
604 |
(void *)cextinction); |
605 |
break; |
606 |
case 'a': /* scattering albedo */ |
607 |
getparam(s+2, "scattering albedo", 'C', |
608 |
(void *)salbedo); |
609 |
break; |
610 |
case 'g': /* scattering eccentricity */ |
611 |
getparam(s+2, "scattering eccentricity", 'r', |
612 |
(void *)&seccg); |
613 |
break; |
614 |
case 's': /* sampling distance */ |
615 |
getparam(s+2, "mist sampling distance", 'r', |
616 |
(void *)&ssampdist); |
617 |
break; |
618 |
default: |
619 |
goto badparam; |
620 |
} |
621 |
break; |
622 |
case 'p': /* pixel */ |
623 |
switch (s[1]) { |
624 |
case 's': /* sample */ |
625 |
if (getparam(s+2, "pixel sample", 'i', |
626 |
(void *)&psample)) |
627 |
pdepth = 0; |
628 |
break; |
629 |
case 't': /* threshold */ |
630 |
if (getparam(s+2, "pixel threshold", 'r', |
631 |
(void *)&maxdiff)) |
632 |
pdepth = 0; |
633 |
break; |
634 |
default: |
635 |
goto badparam; |
636 |
} |
637 |
break; |
638 |
case 's': /* specular */ |
639 |
switch (s[1]) { |
640 |
case 'j': /* jitter */ |
641 |
getparam(s+2, "specular jitter", 'r', |
642 |
(void *)&specjitter); |
643 |
break; |
644 |
case 't': /* threshold */ |
645 |
getparam(s+2, "specular threshold", 'r', |
646 |
(void *)&specthresh); |
647 |
break; |
648 |
default: |
649 |
goto badparam; |
650 |
} |
651 |
break; |
652 |
case '\0': /* nothing */ |
653 |
break; |
654 |
default:; |
655 |
badparam: |
656 |
*sskip(s) = '\0'; |
657 |
sprintf(errmsg, "%s: unknown variable", s); |
658 |
error(COMMAND, errmsg); |
659 |
break; |
660 |
} |
661 |
} |
662 |
|
663 |
|
664 |
void |
665 |
traceray(s) /* trace a single ray */ |
666 |
char *s; |
667 |
{ |
668 |
char buf[128]; |
669 |
int x, y; |
670 |
OBJREC *ino; |
671 |
RAY thisray; |
672 |
|
673 |
thisray.rmax = 0.0; |
674 |
|
675 |
if (!sscanvec(s, thisray.rorg) || |
676 |
!sscanvec(sskip2(s,3), thisray.rdir)) { |
677 |
|
678 |
if (dev->getcur == NULL) |
679 |
return; |
680 |
(*dev->comout)("Pick ray\n"); |
681 |
if ((*dev->getcur)(&x, &y) == ABORT) |
682 |
return; |
683 |
|
684 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
685 |
&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
686 |
error(COMMAND, "not on image"); |
687 |
return; |
688 |
} |
689 |
|
690 |
} else if (normalize(thisray.rdir) == 0.0) { |
691 |
error(COMMAND, "zero ray direction"); |
692 |
return; |
693 |
} |
694 |
|
695 |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
696 |
|
697 |
rayvalue(&thisray); |
698 |
|
699 |
if (thisray.ro == NULL) |
700 |
(*dev->comout)("ray hit nothing"); |
701 |
else { |
702 |
sprintf(buf, "ray hit %s%s %s \"%s\"", |
703 |
thisray.rod < 0.0 ? "back of " : "", |
704 |
thisray.ro->omod == OVOID ? VOIDID : |
705 |
objptr(thisray.ro->omod)->oname, |
706 |
ofun[thisray.ro->otype].funame, |
707 |
thisray.ro->oname); |
708 |
if ((ino = objptr(thisray.robj)) != thisray.ro) |
709 |
sprintf(buf+strlen(buf), " in %s \"%s\"", |
710 |
ofun[ino->otype].funame, ino->oname); |
711 |
(*dev->comout)(buf); |
712 |
(*dev->comin)(buf, NULL); |
713 |
if (thisray.rot >= FHUGE) |
714 |
(*dev->comout)("at infinity"); |
715 |
else { |
716 |
sprintf(buf, "at (%.6g %.6g %.6g) (%.6g)", |
717 |
thisray.rop[0], thisray.rop[1], |
718 |
thisray.rop[2], thisray.rt); |
719 |
(*dev->comout)(buf); |
720 |
} |
721 |
(*dev->comin)(buf, NULL); |
722 |
sprintf(buf, "value (%.5g %.5g %.5g) (%.3gL)", |
723 |
colval(thisray.rcol,RED), |
724 |
colval(thisray.rcol,GRN), |
725 |
colval(thisray.rcol,BLU), |
726 |
luminance(thisray.rcol)); |
727 |
(*dev->comout)(buf); |
728 |
} |
729 |
(*dev->comin)(buf, NULL); |
730 |
} |
731 |
|
732 |
|
733 |
void |
734 |
writepict(s) /* write the picture to a file */ |
735 |
char *s; |
736 |
{ |
737 |
static char buf[128]; |
738 |
char *fname; |
739 |
FILE *fp; |
740 |
COLR *scanline; |
741 |
int y; |
742 |
|
743 |
while (isspace(*s)) |
744 |
s++; |
745 |
if (*s) |
746 |
atos(buf, sizeof(buf), s); |
747 |
else if (buf[0] == '\0') { |
748 |
error(COMMAND, "no file"); |
749 |
return; |
750 |
} |
751 |
if ((fname = getpath(buf, NULL, 0)) == NULL || |
752 |
(fp = fopen(fname, "w")) == NULL) { |
753 |
sprintf(errmsg, "cannot open \"%s\"", buf); |
754 |
error(COMMAND, errmsg); |
755 |
return; |
756 |
} |
757 |
SET_FILE_BINARY(fp); |
758 |
(*dev->comout)("writing \""); |
759 |
(*dev->comout)(fname); |
760 |
(*dev->comout)("\"...\n"); |
761 |
/* write header */ |
762 |
newheader("RADIANCE", fp); |
763 |
fputs(progname, fp); |
764 |
fprintview(&ourview, fp); |
765 |
if (octname != NULL) |
766 |
fprintf(fp, " %s\n", octname); |
767 |
else |
768 |
putc('\n', fp); |
769 |
fprintf(fp, "SOFTWARE= %s\n", VersionID); |
770 |
fputnow(fp); |
771 |
if (exposure != 1.0) |
772 |
fputexpos(exposure, fp); |
773 |
if (dev->pixaspect != 1.0) |
774 |
fputaspect(dev->pixaspect, fp); |
775 |
fputformat(COLRFMT, fp); |
776 |
putc('\n', fp); |
777 |
fprtresolu(hresolu, vresolu, fp); |
778 |
|
779 |
scanline = (COLR *)malloc(hresolu*sizeof(COLR)); |
780 |
if (scanline == NULL) { |
781 |
error(COMMAND, "not enough memory!"); |
782 |
fclose(fp); |
783 |
unlink(fname); |
784 |
return; |
785 |
} |
786 |
for (y = vresolu-1; y >= 0; y--) { |
787 |
getpictcolrs(y, scanline, &ptrunk, hresolu, vresolu); |
788 |
if (fwritecolrs(scanline, hresolu, fp) < 0) |
789 |
break; |
790 |
} |
791 |
free((void *)scanline); |
792 |
if (fclose(fp) < 0) |
793 |
error(COMMAND, "write error"); |
794 |
} |