1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: pcomb.c,v 2.52 2019/04/03 20:16:31 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Combine picture files according to calcomp functions. |
6 |
* |
7 |
* 1/4/89 |
8 |
*/ |
9 |
|
10 |
#include "platform.h" |
11 |
#include "standard.h" |
12 |
#include "paths.h" |
13 |
#include "color.h" |
14 |
#include "calcomp.h" |
15 |
#include "view.h" |
16 |
|
17 |
#define MAXINP 1024 /* maximum number of input files */ |
18 |
#define WINSIZ 127 /* scanline window size */ |
19 |
#define MIDSCN ((WINSIZ-1)/2+1) |
20 |
|
21 |
struct { |
22 |
char *name; /* file or command name */ |
23 |
FILE *fp; /* stream pointer */ |
24 |
VIEW vw; /* view for picture */ |
25 |
RESOLU rs; /* image resolution and orientation */ |
26 |
float pa; /* pixel aspect ratio */ |
27 |
COLOR *scan[WINSIZ]; /* input scanline window */ |
28 |
COLOR coef; /* coefficient */ |
29 |
COLOR expos; /* recorded exposure */ |
30 |
} input[MAXINP]; /* input pictures */ |
31 |
|
32 |
int nfiles; /* number of input files */ |
33 |
|
34 |
VIEW *commvp = NULL; /* common view parameters */ |
35 |
|
36 |
char ourfmt[LPICFMT+1] = PICFMT; /* input picture format */ |
37 |
|
38 |
char StandardInput[] = "<stdin>"; |
39 |
char Command[] = "<Command>"; |
40 |
char vcolin[3][4] = {"ri", "gi", "bi"}; |
41 |
char vcolout[3][4] = {"ro", "go", "bo"}; |
42 |
char vbrtin[] = "li"; |
43 |
char vbrtout[] = "lo"; |
44 |
char vcolexp[3][4] = {"re", "ge", "be"}; |
45 |
char vbrtexp[] = "le"; |
46 |
char vpixaspect[] = "pa"; |
47 |
|
48 |
char vray[7][4] = {"Ox", "Oy", "Oz", "Dx", "Dy", "Dz", "T"}; |
49 |
|
50 |
char vpsize[] = "S"; |
51 |
|
52 |
char vnfiles[] = "nfiles"; |
53 |
char vwhteff[] = "WE"; |
54 |
char vxmax[] = "xmax"; |
55 |
char vymax[] = "ymax"; |
56 |
char vxres[] = "xres"; |
57 |
char vyres[] = "yres"; |
58 |
char vxpos[] = "x"; |
59 |
char vypos[] = "y"; |
60 |
|
61 |
int nowarn = 0; /* no warning messages? */ |
62 |
|
63 |
int xmax = 0, ymax = 0; /* input resolution */ |
64 |
|
65 |
int xscan, yscan; /* input position */ |
66 |
|
67 |
int xres, yres; /* output resolution */ |
68 |
|
69 |
int xpos, ypos; /* output position */ |
70 |
|
71 |
char *progname; /* global argv[0] */ |
72 |
|
73 |
int echoheader = 1; |
74 |
int wrongformat = 0; |
75 |
int gotview; |
76 |
|
77 |
|
78 |
static gethfunc headline; |
79 |
static void checkfile(int orig); |
80 |
static double rgb_bright(COLOR clr); |
81 |
static double xyz_bright(COLOR clr); |
82 |
static void init(void); |
83 |
static void combine(void); |
84 |
static void advance(void); |
85 |
static double l_expos(char *nam); |
86 |
static double l_pixaspect(char *nm); |
87 |
static double l_colin(char *nam); |
88 |
static double l_ray(char *nam); |
89 |
static double l_psize(char *nm); |
90 |
|
91 |
|
92 |
int |
93 |
main( |
94 |
int argc, |
95 |
char *argv[] |
96 |
) |
97 |
{ |
98 |
int original; |
99 |
double f; |
100 |
int a; |
101 |
|
102 |
SET_DEFAULT_BINARY(); |
103 |
SET_FILE_BINARY(stdin); |
104 |
SET_FILE_BINARY(stdout); |
105 |
progname = argv[0]; |
106 |
esupport |= E_VARIABLE|E_FUNCTION|E_RCONST; |
107 |
esupport &= ~(E_OUTCHAN|E_INCHAN); |
108 |
/* scan options */ |
109 |
for (a = 1; a < argc; a++) { |
110 |
if (argv[a][0] == '-') |
111 |
switch (argv[a][1]) { |
112 |
case 'x': |
113 |
case 'y': |
114 |
a++; |
115 |
continue; |
116 |
case 'w': |
117 |
nowarn = !nowarn; |
118 |
continue; |
119 |
case 'h': |
120 |
echoheader = !echoheader; |
121 |
continue; |
122 |
case 'f': |
123 |
case 'e': |
124 |
a++; |
125 |
continue; |
126 |
} |
127 |
break; |
128 |
} |
129 |
newheader("RADIANCE", stdout); /* start header */ |
130 |
fputnow(stdout); |
131 |
/* process files */ |
132 |
for (nfiles = 0; nfiles < MAXINP; nfiles++) { |
133 |
setcolor(input[nfiles].coef, 1.0, 1.0, 1.0); |
134 |
setcolor(input[nfiles].expos, 1.0, 1.0, 1.0); |
135 |
input[nfiles].vw = stdview; |
136 |
input[nfiles].pa = 1.0; |
137 |
} |
138 |
nfiles = 0; |
139 |
original = 0; |
140 |
for ( ; a < argc; a++) { |
141 |
if (nfiles >= MAXINP) { |
142 |
eputs(argv[0]); |
143 |
eputs(": too many picture files\n"); |
144 |
quit(1); |
145 |
} |
146 |
if (argv[a][0] == '-') |
147 |
switch (argv[a][1]) { |
148 |
case '\0': |
149 |
input[nfiles].name = StandardInput; |
150 |
input[nfiles].fp = stdin; |
151 |
break; |
152 |
case 'o': |
153 |
original++; |
154 |
continue; |
155 |
case 's': |
156 |
f = atof(argv[++a]); |
157 |
scalecolor(input[nfiles].coef, f); |
158 |
continue; |
159 |
case 'c': |
160 |
colval(input[nfiles].coef,RED)*=atof(argv[++a]); |
161 |
colval(input[nfiles].coef,GRN)*=atof(argv[++a]); |
162 |
colval(input[nfiles].coef,BLU)*=atof(argv[++a]); |
163 |
continue; |
164 |
default: |
165 |
goto usage; |
166 |
} |
167 |
else { |
168 |
if (argv[a][0] == '!') { |
169 |
input[nfiles].name = Command; |
170 |
input[nfiles].fp = popen(argv[a]+1, "r"); |
171 |
} else { |
172 |
input[nfiles].name = argv[a]; |
173 |
input[nfiles].fp = fopen(argv[a], "r"); |
174 |
} |
175 |
if (input[nfiles].fp == NULL) { |
176 |
perror(argv[a]); |
177 |
quit(1); |
178 |
} |
179 |
} |
180 |
checkfile(original); |
181 |
nfiles++; |
182 |
original = 0; |
183 |
} |
184 |
init(); /* set constants */ |
185 |
/* go back and get expressions */ |
186 |
for (a = 1; a < argc; a++) { |
187 |
char *fpath; |
188 |
if (argv[a][0] == '-') |
189 |
switch (argv[a][1]) { |
190 |
case 'x': |
191 |
varset(vxres, ':', eval(argv[++a])); |
192 |
continue; |
193 |
case 'y': |
194 |
varset(vyres, ':', eval(argv[++a])); |
195 |
continue; |
196 |
case 'w': |
197 |
continue; |
198 |
case 'h': |
199 |
continue; |
200 |
case 'f': |
201 |
fpath = getpath(argv[++a], getrlibpath(), 0); |
202 |
if (fpath == NULL) { |
203 |
eputs(argv[0]); |
204 |
eputs(": cannot find file '"); |
205 |
eputs(argv[a]); |
206 |
eputs("'\n"); |
207 |
quit(1); |
208 |
} |
209 |
fcompile(fpath); |
210 |
continue; |
211 |
case 'e': |
212 |
scompile(argv[++a], NULL, 0); |
213 |
continue; |
214 |
} |
215 |
break; |
216 |
} |
217 |
/* get output resolution */ |
218 |
xres = varvalue(vxres) + .5; |
219 |
yres = varvalue(vyres) + .5; |
220 |
if (xres <= 0 || yres <= 0) { |
221 |
eputs(argv[0]); |
222 |
eputs(": illegal output resolution\n"); |
223 |
quit(1); |
224 |
} |
225 |
/* complete header */ |
226 |
printargs(argc, argv, stdout); |
227 |
if (commvp != NULL) { |
228 |
fputs(VIEWSTR, stdout); |
229 |
fprintview(commvp, stdout); |
230 |
fputc('\n', stdout); |
231 |
} |
232 |
if (strcmp(ourfmt, PICFMT)) |
233 |
fputformat(ourfmt, stdout); /* print format if known */ |
234 |
putchar('\n'); |
235 |
fprtresolu(xres, yres, stdout); |
236 |
/* combine pictures */ |
237 |
combine(); |
238 |
quit(0); |
239 |
usage: |
240 |
eputs("Usage: "); |
241 |
eputs(argv[0]); |
242 |
eputs( |
243 |
" [-w][-h][-x xr][-y yr][-e expr][-f file] [ [-o][-s f][-c r g b] hdr ..]\n"); |
244 |
quit(1); |
245 |
return 1; /* pro forma return */ |
246 |
} |
247 |
|
248 |
|
249 |
static int |
250 |
headline( /* check header line & echo if requested */ |
251 |
char *s, |
252 |
void *p |
253 |
) |
254 |
{ |
255 |
int orig = *(int *)p; |
256 |
char fmt[MAXFMTLEN]; |
257 |
double d; |
258 |
COLOR ctmp; |
259 |
|
260 |
if (isheadid(s)) /* header id */ |
261 |
return(0); /* don't echo */ |
262 |
if (formatval(fmt, s)) { /* check format */ |
263 |
if (globmatch(ourfmt, fmt)) { |
264 |
wrongformat = 0; |
265 |
strcpy(ourfmt, fmt); |
266 |
} else |
267 |
wrongformat = globmatch(PICFMT, fmt) ? 1 : -1; |
268 |
return(0); /* don't echo */ |
269 |
} |
270 |
if (orig) { /* undo exposure? */ |
271 |
if (isexpos(s)) { |
272 |
d = 1./exposval(s); |
273 |
scalecolor(input[nfiles].coef, d); |
274 |
return(0); /* don't echo */ |
275 |
} |
276 |
if (iscolcor(s)) { |
277 |
int i; |
278 |
colcorval(ctmp, s); |
279 |
for (i = 3; i--; ) |
280 |
colval(input[nfiles].coef,i) /= colval(ctmp,i); |
281 |
return(0); /* don't echo */ |
282 |
} |
283 |
} else if (isexpos(s)) { /* record exposure? */ |
284 |
d = exposval(s); |
285 |
scalecolor(input[nfiles].expos, d); |
286 |
} else if (iscolcor(s)) { |
287 |
colcorval(ctmp, s); |
288 |
multcolor(input[nfiles].expos, ctmp); |
289 |
} else if (isaspect(s)) |
290 |
input[nfiles].pa *= aspectval(s); |
291 |
else if (isview(s) && sscanview(&input[nfiles].vw, s) > 0) |
292 |
gotview++; |
293 |
|
294 |
if (echoheader) { /* echo line */ |
295 |
putchar('\t'); |
296 |
return(fputs(s, stdout)); |
297 |
} |
298 |
return(0); |
299 |
} |
300 |
|
301 |
|
302 |
static void |
303 |
checkfile(int orig) /* ready a file */ |
304 |
{ |
305 |
int i; |
306 |
/* process header */ |
307 |
gotview = 0; |
308 |
if (echoheader) { |
309 |
fputs(input[nfiles].name, stdout); |
310 |
fputs(":\n", stdout); |
311 |
} |
312 |
getheader(input[nfiles].fp, headline, &orig); |
313 |
if (wrongformat < 0) { |
314 |
eputs(input[nfiles].name); |
315 |
eputs(": not a Radiance picture\n"); |
316 |
quit(1); |
317 |
} |
318 |
if (wrongformat > 0) { |
319 |
wputs(input[nfiles].name); |
320 |
wputs(": warning -- incompatible picture format\n"); |
321 |
} |
322 |
if (!gotview || setview(&input[nfiles].vw) != NULL) |
323 |
input[nfiles].vw.type = 0; |
324 |
else if (commvp == NULL) |
325 |
commvp = &input[nfiles].vw; |
326 |
if (!fgetsresolu(&input[nfiles].rs, input[nfiles].fp)) { |
327 |
eputs(input[nfiles].name); |
328 |
eputs(": bad picture size\n"); |
329 |
quit(1); |
330 |
} |
331 |
if (xmax == 0 && ymax == 0) { |
332 |
xmax = scanlen(&input[nfiles].rs); |
333 |
ymax = numscans(&input[nfiles].rs); |
334 |
} else if (scanlen(&input[nfiles].rs) != xmax || |
335 |
numscans(&input[nfiles].rs) != ymax) { |
336 |
eputs(input[nfiles].name); |
337 |
eputs(": resolution mismatch\n"); |
338 |
quit(1); |
339 |
} |
340 |
/* allocate scanlines */ |
341 |
for (i = 0; i < WINSIZ; i++) |
342 |
input[nfiles].scan[i] = (COLOR *)emalloc(xmax*sizeof(COLOR)); |
343 |
} |
344 |
|
345 |
|
346 |
static double |
347 |
rgb_bright( |
348 |
COLOR clr |
349 |
) |
350 |
{ |
351 |
return(bright(clr)); |
352 |
} |
353 |
|
354 |
|
355 |
static double |
356 |
xyz_bright( |
357 |
COLOR clr |
358 |
) |
359 |
{ |
360 |
return(clr[CIEY]); |
361 |
} |
362 |
|
363 |
|
364 |
double (*ourbright)() = rgb_bright; |
365 |
|
366 |
|
367 |
static void |
368 |
init(void) /* perform final setup */ |
369 |
{ |
370 |
int i; |
371 |
/* define constants */ |
372 |
varset("PI", ':', PI); |
373 |
varset(vnfiles, ':', (double)nfiles); |
374 |
varset(vxmax, ':', (double)xmax); |
375 |
varset(vymax, ':', (double)ymax); |
376 |
/* set functions */ |
377 |
for (i = 0; i < 3; i++) { |
378 |
funset(vcolexp[i], 1, ':', l_expos); |
379 |
funset(vcolin[i], 1, '=', l_colin); |
380 |
} |
381 |
funset(vbrtexp, 1, ':', l_expos); |
382 |
funset(vbrtin, 1, '=', l_colin); |
383 |
funset(vpixaspect, 1, ':', l_pixaspect); |
384 |
for (i = 0; i < 7; i++) |
385 |
funset(vray[i], 1, '=', l_ray); |
386 |
funset(vpsize, 1, '=', l_psize); |
387 |
/* set brightness function */ |
388 |
if (!strcmp(ourfmt, CIEFMT)) { |
389 |
varset(vwhteff, ':', 1.0); |
390 |
ourbright = xyz_bright; |
391 |
} else |
392 |
varset(vwhteff, ':', WHTEFFICACY); |
393 |
/* these may be overridden */ |
394 |
varset(vxres, ':', (double)xmax); |
395 |
varset(vyres, ':', (double)ymax); |
396 |
} |
397 |
|
398 |
|
399 |
static void |
400 |
combine(void) /* combine pictures */ |
401 |
{ |
402 |
EPNODE *coldef[3], *brtdef; |
403 |
COLOR *scanout; |
404 |
double d; |
405 |
int i, j; |
406 |
/* check defined variables */ |
407 |
for (j = 0; j < 3; j++) { |
408 |
if (vardefined(vcolout[j])) |
409 |
coldef[j] = eparse(vcolout[j]); |
410 |
else |
411 |
coldef[j] = NULL; |
412 |
} |
413 |
if (vardefined(vbrtout)) |
414 |
brtdef = eparse(vbrtout); |
415 |
else |
416 |
brtdef = NULL; |
417 |
/* allocate scanline */ |
418 |
scanout = (COLOR *)emalloc(xres*sizeof(COLOR)); |
419 |
/* set input position */ |
420 |
yscan = ymax+MIDSCN; |
421 |
/* combine files */ |
422 |
for (ypos = yres-1; ypos >= 0; ypos--) { |
423 |
advance(); |
424 |
varset(vypos, '=', (double)ypos); |
425 |
for (xpos = 0; xpos < xres; xpos++) { |
426 |
xscan = (xpos+.5)*xmax/xres; |
427 |
varset(vxpos, '=', (double)xpos); |
428 |
eclock++; |
429 |
if (brtdef != NULL) { |
430 |
d = evalue(brtdef); |
431 |
if (d < 0.0) |
432 |
d = 0.0; |
433 |
setcolor(scanout[xpos], d, d, d); |
434 |
} else { |
435 |
for (j = 0; j < 3; j++) { |
436 |
if (coldef[j] != NULL) { |
437 |
d = evalue(coldef[j]); |
438 |
} else { |
439 |
d = 0.0; |
440 |
for (i = 0; i < nfiles; i++) |
441 |
d += colval(input[i].scan[MIDSCN][xscan],j); |
442 |
} |
443 |
if (d < 0.0) |
444 |
d = 0.0; |
445 |
colval(scanout[xpos],j) = d; |
446 |
} |
447 |
} |
448 |
} |
449 |
if (fwritescan(scanout, xres, stdout) < 0) { |
450 |
perror("write error"); |
451 |
quit(1); |
452 |
} |
453 |
} |
454 |
efree((char *)scanout); |
455 |
} |
456 |
|
457 |
|
458 |
static void |
459 |
advance(void) /* read in data for next scanline */ |
460 |
{ |
461 |
int ytarget; |
462 |
COLOR *st; |
463 |
int i, j; |
464 |
|
465 |
for (ytarget = (ypos+.5)*ymax/yres; yscan > ytarget; yscan--) |
466 |
for (i = 0; i < nfiles; i++) { |
467 |
st = input[i].scan[WINSIZ-1]; |
468 |
for (j = WINSIZ-1; j > 0; j--) /* rotate window */ |
469 |
input[i].scan[j] = input[i].scan[j-1]; |
470 |
input[i].scan[0] = st; |
471 |
if (yscan <= MIDSCN) /* hit bottom? */ |
472 |
continue; |
473 |
if (freadscan(st, xmax, input[i].fp) < 0) { /* read */ |
474 |
eputs(input[i].name); |
475 |
eputs(": read error\n"); |
476 |
quit(1); |
477 |
} |
478 |
for (j = 0; j < xmax; j++) /* adjust color */ |
479 |
multcolor(st[j], input[i].coef); |
480 |
} |
481 |
} |
482 |
|
483 |
|
484 |
static double |
485 |
l_expos( /* return picture exposure */ |
486 |
char *nam |
487 |
) |
488 |
{ |
489 |
int fn, n; |
490 |
double d; |
491 |
|
492 |
d = argument(1); |
493 |
if (d <= -0.5 || d >= nfiles+0.5) { |
494 |
errno = EDOM; |
495 |
return(0.0); |
496 |
} |
497 |
if (d < 0.5) |
498 |
return((double)nfiles); |
499 |
fn = d - 0.5; |
500 |
if (nam == vbrtexp) |
501 |
return((*ourbright)(input[fn].expos)); |
502 |
n = 3; |
503 |
while (n--) |
504 |
if (nam == vcolexp[n]) |
505 |
return(colval(input[fn].expos,n)); |
506 |
eputs("Bad call to l_expos()!\n"); |
507 |
quit(1); |
508 |
return 1; /* pro forma return */ |
509 |
} |
510 |
|
511 |
|
512 |
static double |
513 |
l_pixaspect(char *nm) /* return pixel aspect ratio */ |
514 |
{ |
515 |
int fn; |
516 |
double d; |
517 |
|
518 |
d = argument(1); |
519 |
if (d <= -0.5 || d >= nfiles+0.5) { |
520 |
errno = EDOM; |
521 |
return(0.0); |
522 |
} |
523 |
if (d < 0.5) |
524 |
return((double)nfiles); |
525 |
fn = d - 0.5; |
526 |
return(input[fn].pa); |
527 |
} |
528 |
|
529 |
|
530 |
static double |
531 |
l_colin( /* return color value for picture */ |
532 |
char *nam |
533 |
) |
534 |
{ |
535 |
int fn; |
536 |
int n, xoff, yoff; |
537 |
double d; |
538 |
|
539 |
d = argument(1); |
540 |
if (d <= -0.5 || d >= nfiles+0.5) { |
541 |
errno = EDOM; |
542 |
return(0.0); |
543 |
} |
544 |
if (d < 0.5) |
545 |
return((double)nfiles); |
546 |
fn = d - 0.5; |
547 |
xoff = yoff = 0; |
548 |
n = nargum(); |
549 |
if (n >= 2) { |
550 |
d = argument(2); |
551 |
if (d < 0.0) { |
552 |
xoff = d-.5; |
553 |
if (xscan+xoff < 0) |
554 |
xoff = -xscan; |
555 |
} else { |
556 |
xoff = d+.5; |
557 |
if (xscan+xoff >= xmax) |
558 |
xoff = xmax-1-xscan; |
559 |
} |
560 |
} |
561 |
if (n >= 3) { |
562 |
d = argument(3); |
563 |
if (d < 0.0) { |
564 |
yoff = d-.5; |
565 |
if (yoff+MIDSCN < 0) |
566 |
yoff = -MIDSCN; |
567 |
if (yscan+yoff < 0) |
568 |
yoff = -yscan; |
569 |
} else { |
570 |
yoff = d+.5; |
571 |
if (yoff+MIDSCN >= WINSIZ) |
572 |
yoff = WINSIZ-1-MIDSCN; |
573 |
if (yscan+yoff >= ymax) |
574 |
yoff = ymax-1-yscan; |
575 |
} |
576 |
} |
577 |
if (nam == vbrtin) |
578 |
return((*ourbright)(input[fn].scan[MIDSCN+yoff][xscan+xoff])); |
579 |
n = 3; |
580 |
while (n--) |
581 |
if (nam == vcolin[n]) |
582 |
return(colval(input[fn].scan[MIDSCN+yoff][xscan+xoff],n)); |
583 |
eputs("Bad call to l_colin()!\n"); |
584 |
quit(1); |
585 |
return 1; /* pro forma return */ |
586 |
} |
587 |
|
588 |
|
589 |
static double |
590 |
l_ray( /* return ray origin or direction */ |
591 |
char *nam |
592 |
) |
593 |
{ |
594 |
static unsigned long ltick[MAXINP]; |
595 |
static FVECT lorg[MAXINP], ldir[MAXINP]; |
596 |
static double ldist[MAXINP]; |
597 |
RREAL loc[2]; |
598 |
double d; |
599 |
int fn; |
600 |
int i; |
601 |
|
602 |
d = argument(1); |
603 |
if (d <= -0.5 || d >= nfiles+0.5) { |
604 |
errno = EDOM; |
605 |
return(0.0); |
606 |
} |
607 |
if (d < 0.5) |
608 |
return((double)nfiles); |
609 |
fn = d - 0.5; |
610 |
if (ltick[fn] != eclock) { /* need to compute? */ |
611 |
lorg[fn][0] = lorg[fn][1] = lorg[fn][2] = 0.0; |
612 |
ldir[fn][0] = ldir[fn][1] = ldir[fn][2] = 0.0; |
613 |
ldist[fn] = -1.0; |
614 |
if (input[fn].vw.type == 0) |
615 |
errno = EDOM; |
616 |
else { |
617 |
pix2loc(loc, &input[fn].rs, xscan, ymax-1-yscan); |
618 |
ldist[fn] = viewray(lorg[fn], ldir[fn], |
619 |
&input[fn].vw, loc[0], loc[1]); |
620 |
} |
621 |
ltick[fn] = eclock; |
622 |
} |
623 |
if (nam == vray[i=6]) |
624 |
return(ldist[fn]); |
625 |
while (i--) |
626 |
if (nam == vray[i]) |
627 |
return(i < 3 ? lorg[fn][i] : ldir[fn][i-3]); |
628 |
eputs("Bad call to l_ray()!\n"); |
629 |
quit(1); |
630 |
return 1; /* pro forma return */ |
631 |
} |
632 |
|
633 |
|
634 |
static double |
635 |
l_psize(char *nm) /* compute pixel size in steradians */ |
636 |
{ |
637 |
static unsigned long ltick[MAXINP]; |
638 |
static double psize[MAXINP]; |
639 |
FVECT dir0, org, dirx, diry; |
640 |
RREAL locx[2], locy[2]; |
641 |
double d; |
642 |
int fn; |
643 |
int i; |
644 |
|
645 |
d = argument(1); |
646 |
if (d <= -0.5 || d >= nfiles+0.5) { |
647 |
errno = EDOM; |
648 |
return(0.0); |
649 |
} |
650 |
if (d < 0.5) |
651 |
return((double)nfiles); |
652 |
fn = d - 0.5; |
653 |
if (ltick[fn] != eclock) { /* need to compute? */ |
654 |
psize[fn] = 0.0; |
655 |
if (input[fn].vw.type == 0) |
656 |
errno = EDOM; |
657 |
else if (input[fn].vw.type != VT_PAR && |
658 |
funvalue(vray[6], 1, &d) >= -FTINY) { |
659 |
for (i = 0; i < 3; i++) |
660 |
dir0[i] = funvalue(vray[3+i], 1, &d); |
661 |
pix2loc(locx, &input[fn].rs, xscan+1, ymax-1-yscan); |
662 |
pix2loc(locy, &input[fn].rs, xscan, ymax-yscan); |
663 |
if (viewray(org, dirx, &input[fn].vw, |
664 |
locx[0], locx[1]) >= -FTINY && |
665 |
viewray(org, diry, &input[fn].vw, |
666 |
locy[0], locy[1]) >= -FTINY) { |
667 |
/* approximate solid angle */ |
668 |
for (i = 0; i < 3; i++) { |
669 |
dirx[i] -= dir0[i]; |
670 |
diry[i] -= dir0[i]; |
671 |
} |
672 |
fcross(dir0, dirx, diry); |
673 |
psize[fn] = VLEN(dir0); |
674 |
} |
675 |
} |
676 |
ltick[fn] = eclock; |
677 |
} |
678 |
return(psize[fn]); |
679 |
} |
680 |
|
681 |
|
682 |
extern void |
683 |
wputs(char *msg) |
684 |
{ |
685 |
if (!nowarn) |
686 |
eputs(msg); |
687 |
} |
688 |
|
689 |
|
690 |
extern void |
691 |
eputs(char *msg) |
692 |
{ |
693 |
fputs(msg, stderr); |
694 |
} |
695 |
|
696 |
|
697 |
extern void |
698 |
quit(int code) /* exit gracefully */ |
699 |
{ |
700 |
int i; |
701 |
/* close input files */ |
702 |
for (i = 0; i < nfiles; i++) |
703 |
if (input[i].name == Command) |
704 |
pclose(input[i].fp); |
705 |
else |
706 |
fclose(input[i].fp); |
707 |
exit(code); |
708 |
} |