1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: pinterp.c,v 2.46 2018/01/24 04:39:52 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Interpolate and extrapolate pictures with different view parameters. |
6 |
* |
7 |
* Greg Ward 09Dec89 |
8 |
*/ |
9 |
|
10 |
#include "copyright.h" |
11 |
|
12 |
#include <ctype.h> |
13 |
#include <string.h> |
14 |
|
15 |
#include "platform.h" |
16 |
#include "standard.h" |
17 |
#include "rtprocess.h" /* Windows: must come before color.h */ |
18 |
#include "view.h" |
19 |
#include "color.h" |
20 |
|
21 |
#define LOG2 0.69314718055994530942 |
22 |
|
23 |
#define pscan(y) (ourpict+(y)*hresolu) |
24 |
#define sscan(y) (ourspict+(y)*hresolu) |
25 |
#define wscan(y) (ourweigh+(y)*hresolu) |
26 |
#define zscan(y) (ourzbuf+(y)*hresolu) |
27 |
#define bscan(y) (ourbpict+(y)*hresolu) |
28 |
#define averaging (ourweigh != NULL) |
29 |
#define blurring (ourbpict != NULL) |
30 |
#define usematrix (hasmatrix & !averaging) |
31 |
#define zisnorm ((!usematrix) | (ourview.type != VT_PER)) |
32 |
|
33 |
#define MAXWT 1000. /* maximum pixel weight (averaging) */ |
34 |
|
35 |
#define F_FORE 1 /* fill foreground */ |
36 |
#define F_BACK 2 /* fill background */ |
37 |
|
38 |
#define PACKSIZ 256 /* max. calculation packet size */ |
39 |
|
40 |
#define RTCOM "rtrace -h- -ovl -fff -ld- -i- -I- " |
41 |
|
42 |
#define ABS(x) ((x)>0?(x):-(x)) |
43 |
|
44 |
struct position {int x,y; float z;}; |
45 |
|
46 |
#define NSTEPS 64 /* number steps in overlap prescan */ |
47 |
#define MINSTEP 4 /* minimum worthwhile preview step */ |
48 |
|
49 |
struct bound {int min,max;}; |
50 |
|
51 |
VIEW ourview = STDVIEW; /* desired view */ |
52 |
int hresolu = 512; /* horizontal resolution */ |
53 |
int vresolu = 512; /* vertical resolution */ |
54 |
double pixaspect = 1.0; /* pixel aspect ratio */ |
55 |
|
56 |
double zeps = .02; /* allowed z epsilon */ |
57 |
|
58 |
COLR *ourpict; /* output picture (COLR's) */ |
59 |
COLOR *ourspict; /* output pixel sums (averaging) */ |
60 |
float *ourweigh = NULL; /* output pixel weights (averaging) */ |
61 |
float *ourzbuf; /* corresponding z-buffer */ |
62 |
COLOR *ourbpict = NULL; /* blurred picture (view averaging) */ |
63 |
|
64 |
VIEW avgview; /* average view for -B option */ |
65 |
int nvavg; /* number of views averaged */ |
66 |
|
67 |
char *progname; |
68 |
|
69 |
int fillo = F_FORE|F_BACK; /* selected fill options */ |
70 |
int fillsamp = 0; /* sample separation (0 == inf) */ |
71 |
COLR backcolr = BLKCOLR; /* background color */ |
72 |
COLOR backcolor = BLKCOLOR; /* background color (float) */ |
73 |
double backz = 0.0; /* background z value */ |
74 |
int normdist = 1; /* i/o normalized distance? */ |
75 |
char ourfmt[LPICFMT+1] = PICFMT; /* original picture format */ |
76 |
double ourexp = -1; /* original picture exposure */ |
77 |
int expadj = 0; /* exposure adjustment (f-stops) */ |
78 |
double rexpadj = 1; /* real exposure adjustment */ |
79 |
|
80 |
VIEW theirview; /* input view */ |
81 |
int gotview; /* got input view? */ |
82 |
int wrongformat = 0; /* input in another format? */ |
83 |
RESOLU tresolu; /* input resolution */ |
84 |
double theirexp; /* input picture exposure */ |
85 |
MAT4 theirs2ours; /* transformation matrix */ |
86 |
int hasmatrix = 0; /* has transformation matrix */ |
87 |
|
88 |
static SUBPROC PDesc = SP_INACTIVE; /* rtrace process descriptor */ |
89 |
unsigned short queue[PACKSIZ][2]; /* pending pixels */ |
90 |
int packsiz; /* actual packet size */ |
91 |
int queuesiz = 0; /* number of pixels pending */ |
92 |
|
93 |
typedef void fillfunc_t(int x, int y); |
94 |
|
95 |
static gethfunc headline; |
96 |
static int nextview(FILE *fp); |
97 |
static void compavgview(void); |
98 |
static void addpicture(char *pfile, char *zspec); |
99 |
static int pixform(MAT4 xfmat, VIEW *vw1, VIEW *vw2); |
100 |
static void addscanline(struct bound *xl, int y, |
101 |
COLR *pline, float *zline, struct position *lasty); |
102 |
static void addpixel(struct position *p0, struct position *p1, |
103 |
struct position *p2, COLR pix, double w, double z); |
104 |
static double movepixel(FVECT pos); |
105 |
static int getperim(struct bound *xl, struct bound *yl, float *zline, int zfd); |
106 |
static void backpicture(fillfunc_t *fill, int samp); |
107 |
static void fillpicture(fillfunc_t *fill); |
108 |
static int clipaft(void); |
109 |
static int addblur(void); |
110 |
static void writepicture(void); |
111 |
static void writedistance(char *fname); |
112 |
static fillfunc_t backfill; |
113 |
static fillfunc_t rcalfill; |
114 |
static void calstart(char *prog, char *args); |
115 |
static void caldone(void); |
116 |
static void clearqueue(void); |
117 |
static void syserror(char *s); |
118 |
|
119 |
fillfunc_t *fillfunc = backfill; /* selected fill function */ |
120 |
|
121 |
int |
122 |
main( /* interpolate pictures */ |
123 |
int argc, |
124 |
char *argv[] |
125 |
) |
126 |
{ |
127 |
#define check(ol,al) if (argv[an][ol] || \ |
128 |
badarg(argc-an-1,argv+an+1,al)) \ |
129 |
goto badopt |
130 |
int gotvfile = 0; |
131 |
int doavg = -1; |
132 |
int doblur = 0; |
133 |
char *zfile = NULL; |
134 |
char *expcomp = NULL; |
135 |
int i, an, rval; |
136 |
|
137 |
SET_DEFAULT_BINARY(); |
138 |
SET_FILE_BINARY(stdout); |
139 |
|
140 |
progname = argv[0]; |
141 |
|
142 |
for (an = 1; an < argc && argv[an][0] == '-'; an++) { |
143 |
rval = getviewopt(&ourview, argc-an, argv+an); |
144 |
if (rval >= 0) { |
145 |
an += rval; |
146 |
continue; |
147 |
} |
148 |
switch (argv[an][1]) { |
149 |
case 'e': /* exposure */ |
150 |
check(2,"f"); |
151 |
expcomp = argv[++an]; |
152 |
break; |
153 |
case 't': /* threshold */ |
154 |
check(2,"f"); |
155 |
zeps = atof(argv[++an]); |
156 |
break; |
157 |
case 'a': /* average */ |
158 |
check(2,NULL); |
159 |
doavg = 1; |
160 |
break; |
161 |
case 'B': /* blur views */ |
162 |
check(2,NULL); |
163 |
doblur = 1; |
164 |
break; |
165 |
case 'q': /* quick (no avg.) */ |
166 |
check(2,NULL); |
167 |
doavg = 0; |
168 |
break; |
169 |
case 'n': /* dist. normalized? */ |
170 |
check(2,NULL); |
171 |
normdist = !normdist; |
172 |
break; |
173 |
case 'f': /* fill type */ |
174 |
switch (argv[an][2]) { |
175 |
case '0': /* none */ |
176 |
check(3,NULL); |
177 |
fillo = 0; |
178 |
break; |
179 |
case 'f': /* foreground */ |
180 |
check(3,NULL); |
181 |
fillo = F_FORE; |
182 |
break; |
183 |
case 'b': /* background */ |
184 |
check(3,NULL); |
185 |
fillo = F_BACK; |
186 |
break; |
187 |
case 'a': /* all */ |
188 |
check(3,NULL); |
189 |
fillo = F_FORE|F_BACK; |
190 |
break; |
191 |
case 's': /* sample */ |
192 |
check(3,"i"); |
193 |
fillsamp = atoi(argv[++an]); |
194 |
break; |
195 |
case 'c': /* color */ |
196 |
check(3,"fff"); |
197 |
fillfunc = backfill; |
198 |
setcolor(backcolor, atof(argv[an+1]), |
199 |
atof(argv[an+2]), atof(argv[an+3])); |
200 |
setcolr(backcolr, colval(backcolor,RED), |
201 |
colval(backcolor,GRN), |
202 |
colval(backcolor,BLU)); |
203 |
an += 3; |
204 |
break; |
205 |
case 'z': /* z value */ |
206 |
check(3,"f"); |
207 |
fillfunc = backfill; |
208 |
backz = atof(argv[++an]); |
209 |
break; |
210 |
case 'r': /* rtrace */ |
211 |
check(3,"s"); |
212 |
fillfunc = rcalfill; |
213 |
calstart(RTCOM, argv[++an]); |
214 |
break; |
215 |
default: |
216 |
goto badopt; |
217 |
} |
218 |
break; |
219 |
case 'z': /* z file */ |
220 |
check(2,"s"); |
221 |
zfile = argv[++an]; |
222 |
break; |
223 |
case 'x': /* x resolution */ |
224 |
check(2,"i"); |
225 |
hresolu = atoi(argv[++an]); |
226 |
break; |
227 |
case 'y': /* y resolution */ |
228 |
check(2,"i"); |
229 |
vresolu = atoi(argv[++an]); |
230 |
break; |
231 |
case 'p': /* pixel aspect */ |
232 |
if (argv[an][2] != 'a') |
233 |
goto badopt; |
234 |
check(3,"f"); |
235 |
pixaspect = atof(argv[++an]); |
236 |
break; |
237 |
case 'v': /* view file */ |
238 |
if (argv[an][2] != 'f') |
239 |
goto badopt; |
240 |
check(3,"s"); |
241 |
gotvfile = viewfile(argv[++an], &ourview, NULL); |
242 |
if (gotvfile < 0) |
243 |
syserror(argv[an]); |
244 |
else if (gotvfile == 0) { |
245 |
fprintf(stderr, "%s: bad view file\n", |
246 |
argv[an]); |
247 |
exit(1); |
248 |
} |
249 |
break; |
250 |
default: |
251 |
badopt: |
252 |
fprintf(stderr, "%s: command line error at '%s'\n", |
253 |
progname, argv[an]); |
254 |
goto userr; |
255 |
} |
256 |
} |
257 |
/* check arguments */ |
258 |
if ((argc-an)%2) |
259 |
goto userr; |
260 |
if (fillsamp == 1) |
261 |
fillo &= ~F_BACK; |
262 |
if (doavg < 0) |
263 |
doavg = (argc-an) > 2; |
264 |
if (expcomp != NULL) { |
265 |
if ((expcomp[0] == '+') | (expcomp[0] == '-')) { |
266 |
expadj = atof(expcomp) + (expcomp[0]=='+' ? .5 : -.5); |
267 |
if (doavg | doblur) |
268 |
rexpadj = pow(2.0, atof(expcomp)); |
269 |
else |
270 |
rexpadj = pow(2.0, (double)expadj); |
271 |
} else { |
272 |
if (!isflt(expcomp)) |
273 |
goto userr; |
274 |
rexpadj = atof(expcomp); |
275 |
expadj = log(rexpadj)/LOG2 + (rexpadj>1 ? .5 : -.5); |
276 |
if (!(doavg | doblur)) |
277 |
rexpadj = pow(2.0, (double)expadj); |
278 |
} |
279 |
} |
280 |
/* set view */ |
281 |
if (nextview(doblur ? stdin : (FILE *)NULL) == EOF) { |
282 |
fprintf(stderr, "%s: no view on standard input!\n", |
283 |
progname); |
284 |
exit(1); |
285 |
} |
286 |
normaspect(viewaspect(&ourview), &pixaspect, &hresolu, &vresolu); |
287 |
/* allocate frame */ |
288 |
if (doavg) { |
289 |
ourspict = (COLOR *)bmalloc(hresolu*vresolu*sizeof(COLOR)); |
290 |
ourweigh = (float *)bmalloc(hresolu*vresolu*sizeof(float)); |
291 |
if ((ourspict == NULL) | (ourweigh == NULL)) |
292 |
syserror(progname); |
293 |
} else { |
294 |
ourpict = (COLR *)bmalloc(hresolu*vresolu*sizeof(COLR)); |
295 |
if (ourpict == NULL) |
296 |
syserror(progname); |
297 |
} |
298 |
if (doblur) { |
299 |
ourbpict = (COLOR *)bmalloc(hresolu*vresolu*sizeof(COLOR)); |
300 |
if (ourbpict == NULL) |
301 |
syserror(progname); |
302 |
} |
303 |
ourzbuf = (float *)bmalloc(hresolu*vresolu*sizeof(float)); |
304 |
if (ourzbuf == NULL) |
305 |
syserror(progname); |
306 |
/* new header */ |
307 |
newheader("RADIANCE", stdout); |
308 |
fputnow(stdout); |
309 |
/* run pictures */ |
310 |
do { |
311 |
memset((char *)ourzbuf, '\0', hresolu*vresolu*sizeof(float)); |
312 |
for (i = an; i < argc; i += 2) |
313 |
addpicture(argv[i], argv[i+1]); |
314 |
if (fillo&F_BACK) /* fill in spaces */ |
315 |
backpicture(fillfunc, fillsamp); |
316 |
else |
317 |
fillpicture(fillfunc); |
318 |
/* aft clipping */ |
319 |
clipaft(); |
320 |
} while (addblur() && nextview(stdin) != EOF); |
321 |
/* close calculation */ |
322 |
caldone(); |
323 |
/* add to header */ |
324 |
printargs(argc, argv, stdout); |
325 |
compavgview(); |
326 |
if (doblur | gotvfile) { |
327 |
fputs(VIEWSTR, stdout); |
328 |
fprintview(&avgview, stdout); |
329 |
putc('\n', stdout); |
330 |
} |
331 |
if ((pixaspect < .99) | (pixaspect > 1.01)) |
332 |
fputaspect(pixaspect, stdout); |
333 |
if (ourexp > 0) |
334 |
ourexp *= rexpadj; |
335 |
else |
336 |
ourexp = rexpadj; |
337 |
if ((ourexp < .995) | (ourexp > 1.005)) |
338 |
fputexpos(ourexp, stdout); |
339 |
if (strcmp(ourfmt, PICFMT)) /* print format if known */ |
340 |
fputformat(ourfmt, stdout); |
341 |
putc('\n', stdout); |
342 |
/* write picture */ |
343 |
writepicture(); |
344 |
/* write z file */ |
345 |
if (zfile != NULL) |
346 |
writedistance(zfile); |
347 |
|
348 |
exit(0); |
349 |
userr: |
350 |
fprintf(stderr, |
351 |
"Usage: %s [view opts][-t eps][-z zout][-e spec][-B][-a|-q][-fT][-n] pfile zspec ..\n", |
352 |
progname); |
353 |
exit(1); |
354 |
#undef check |
355 |
} |
356 |
|
357 |
|
358 |
static int |
359 |
headline( /* process header string */ |
360 |
char *s, |
361 |
void *p |
362 |
) |
363 |
{ |
364 |
char fmt[MAXFMTLEN]; |
365 |
|
366 |
if (isheadid(s)) |
367 |
return(0); |
368 |
if (formatval(fmt, s)) { |
369 |
if (globmatch(ourfmt, fmt)) { |
370 |
wrongformat = 0; |
371 |
strcpy(ourfmt, fmt); |
372 |
} else |
373 |
wrongformat = 1; |
374 |
return(0); |
375 |
} |
376 |
if (nvavg < 2) { |
377 |
putc('\t', stdout); |
378 |
fputs(s, stdout); |
379 |
} |
380 |
if (isexpos(s)) { |
381 |
theirexp *= exposval(s); |
382 |
return(0); |
383 |
} |
384 |
if (isview(s) && sscanview(&theirview, s) > 0) |
385 |
gotview++; |
386 |
return(0); |
387 |
} |
388 |
|
389 |
|
390 |
static int |
391 |
nextview( /* get and set next view */ |
392 |
FILE *fp |
393 |
) |
394 |
{ |
395 |
char linebuf[256]; |
396 |
char *err; |
397 |
int i; |
398 |
|
399 |
if (fp != NULL) { |
400 |
do /* get new view */ |
401 |
if (fgets(linebuf, sizeof(linebuf), fp) == NULL) |
402 |
return(EOF); |
403 |
while (!isview(linebuf) || !sscanview(&ourview, linebuf)); |
404 |
} |
405 |
/* set new view */ |
406 |
if ((err = setview(&ourview)) != NULL) { |
407 |
fprintf(stderr, "%s: %s\n", progname, err); |
408 |
exit(1); |
409 |
} |
410 |
if (!nvavg) { /* first view */ |
411 |
avgview = ourview; |
412 |
return(nvavg++); |
413 |
} |
414 |
/* add to average view */ |
415 |
for (i = 0; i < 3; i++) { |
416 |
avgview.vp[i] += ourview.vp[i]; |
417 |
avgview.vdir[i] += ourview.vdir[i]; |
418 |
avgview.vup[i] += ourview.vup[i]; |
419 |
} |
420 |
avgview.vdist += ourview.vdist; |
421 |
avgview.horiz += ourview.horiz; |
422 |
avgview.vert += ourview.vert; |
423 |
avgview.hoff += ourview.hoff; |
424 |
avgview.voff += ourview.voff; |
425 |
avgview.vfore += ourview.vfore; |
426 |
avgview.vaft += ourview.vaft; |
427 |
return(nvavg++); |
428 |
} |
429 |
|
430 |
|
431 |
static void |
432 |
compavgview(void) /* compute average view */ |
433 |
{ |
434 |
int i; |
435 |
double f; |
436 |
|
437 |
if (nvavg < 2) |
438 |
return; |
439 |
f = 1.0/nvavg; |
440 |
for (i = 0; i < 3; i++) { |
441 |
avgview.vp[i] *= f; |
442 |
avgview.vdir[i] *= f; |
443 |
avgview.vup[i] *= f; |
444 |
} |
445 |
avgview.vdist *= f; |
446 |
avgview.horiz *= f; |
447 |
avgview.vert *= f; |
448 |
avgview.hoff *= f; |
449 |
avgview.voff *= f; |
450 |
avgview.vfore *= f; |
451 |
avgview.vaft *= f; |
452 |
if (setview(&avgview) != NULL) /* in case of emergency... */ |
453 |
avgview = ourview; |
454 |
pixaspect = viewaspect(&avgview) * hresolu / vresolu; |
455 |
} |
456 |
|
457 |
|
458 |
static void |
459 |
addpicture( /* add picture to output */ |
460 |
char *pfile, |
461 |
char *zspec |
462 |
) |
463 |
{ |
464 |
FILE *pfp; |
465 |
int zfd; |
466 |
char *err; |
467 |
COLR *scanin; |
468 |
float *zin; |
469 |
struct position *plast; |
470 |
struct bound *xlim, ylim; |
471 |
int y; |
472 |
/* open picture file */ |
473 |
if ((pfp = fopen(pfile, "r")) == NULL) |
474 |
syserror(pfile); |
475 |
/* get header with exposure and view */ |
476 |
theirexp = 1.0; |
477 |
theirview = stdview; |
478 |
gotview = 0; |
479 |
if (nvavg < 2) |
480 |
printf("%s:\n", pfile); |
481 |
getheader(pfp, headline, NULL); |
482 |
if (wrongformat || !gotview || !fgetsresolu(&tresolu, pfp)) { |
483 |
fprintf(stderr, "%s: picture format error\n", pfile); |
484 |
exit(1); |
485 |
} |
486 |
if (ourexp <= 0) |
487 |
ourexp = theirexp; |
488 |
else if (ABS(theirexp-ourexp) > .01*ourexp) |
489 |
fprintf(stderr, "%s: different exposure (warning)\n", pfile); |
490 |
if ( (err = setview(&theirview)) ) { |
491 |
fprintf(stderr, "%s: %s\n", pfile, err); |
492 |
exit(1); |
493 |
} |
494 |
/* compute transformation */ |
495 |
hasmatrix = pixform(theirs2ours, &theirview, &ourview); |
496 |
/* get z specification or file */ |
497 |
zin = (float *)malloc(scanlen(&tresolu)*sizeof(float)); |
498 |
if (zin == NULL) |
499 |
syserror(progname); |
500 |
if ((zfd = open(zspec, O_RDONLY)) == -1) { |
501 |
double zvalue; |
502 |
int x; |
503 |
if (!isflt(zspec) || (zvalue = atof(zspec)) <= 0.0) |
504 |
syserror(zspec); |
505 |
for (x = scanlen(&tresolu); x-- > 0; ) |
506 |
zin[x] = zvalue; |
507 |
} |
508 |
/* compute transferrable perimeter */ |
509 |
xlim = (struct bound *)malloc(numscans(&tresolu)*sizeof(struct bound)); |
510 |
if (xlim == NULL) |
511 |
syserror(progname); |
512 |
if (!getperim(xlim, &ylim, zin, zfd)) { /* overlapping area? */ |
513 |
free((void *)zin); |
514 |
free((void *)xlim); |
515 |
if (zfd != -1) |
516 |
close(zfd); |
517 |
fclose(pfp); |
518 |
return; |
519 |
} |
520 |
/* allocate scanlines */ |
521 |
scanin = (COLR *)malloc(scanlen(&tresolu)*sizeof(COLR)); |
522 |
plast = (struct position *)calloc(scanlen(&tresolu), |
523 |
sizeof(struct position)); |
524 |
if ((scanin == NULL) | (plast == NULL)) |
525 |
syserror(progname); |
526 |
/* skip to starting point */ |
527 |
for (y = 0; y < ylim.min; y++) |
528 |
if (freadcolrs(scanin, scanlen(&tresolu), pfp) < 0) { |
529 |
fprintf(stderr, "%s: read error\n", pfile); |
530 |
exit(1); |
531 |
} |
532 |
if (zfd != -1 && lseek(zfd, |
533 |
(off_t)ylim.min*scanlen(&tresolu)*sizeof(float), |
534 |
SEEK_SET) < 0) |
535 |
syserror(zspec); |
536 |
/* load image */ |
537 |
for (y = ylim.min; y <= ylim.max; y++) { |
538 |
if (freadcolrs(scanin, scanlen(&tresolu), pfp) < 0) { |
539 |
fprintf(stderr, "%s: read error\n", pfile); |
540 |
exit(1); |
541 |
} |
542 |
if (zfd != -1 && read(zfd, (char *)zin, |
543 |
scanlen(&tresolu)*sizeof(float)) |
544 |
< scanlen(&tresolu)*sizeof(float)) |
545 |
syserror(zspec); |
546 |
addscanline(xlim+y, y, scanin, zin, plast); |
547 |
} |
548 |
/* clean up */ |
549 |
free((void *)xlim); |
550 |
free((void *)scanin); |
551 |
free((void *)zin); |
552 |
free((void *)plast); |
553 |
fclose(pfp); |
554 |
if (zfd != -1) |
555 |
close(zfd); |
556 |
} |
557 |
|
558 |
|
559 |
static int |
560 |
pixform( /* compute view1 to view2 matrix */ |
561 |
MAT4 xfmat, |
562 |
VIEW *vw1, |
563 |
VIEW *vw2 |
564 |
) |
565 |
{ |
566 |
MAT4 m4t; |
567 |
|
568 |
if ((vw1->type != VT_PER) & (vw1->type != VT_PAR)) |
569 |
return(0); |
570 |
if ((vw2->type != VT_PER) & (vw2->type != VT_PAR)) |
571 |
return(0); |
572 |
setident4(xfmat); |
573 |
xfmat[0][0] = vw1->hvec[0]; |
574 |
xfmat[0][1] = vw1->hvec[1]; |
575 |
xfmat[0][2] = vw1->hvec[2]; |
576 |
xfmat[1][0] = vw1->vvec[0]; |
577 |
xfmat[1][1] = vw1->vvec[1]; |
578 |
xfmat[1][2] = vw1->vvec[2]; |
579 |
xfmat[2][0] = vw1->vdir[0]; |
580 |
xfmat[2][1] = vw1->vdir[1]; |
581 |
xfmat[2][2] = vw1->vdir[2]; |
582 |
xfmat[3][0] = vw1->vp[0]; |
583 |
xfmat[3][1] = vw1->vp[1]; |
584 |
xfmat[3][2] = vw1->vp[2]; |
585 |
setident4(m4t); |
586 |
m4t[0][0] = vw2->hvec[0]/vw2->hn2; |
587 |
m4t[1][0] = vw2->hvec[1]/vw2->hn2; |
588 |
m4t[2][0] = vw2->hvec[2]/vw2->hn2; |
589 |
m4t[3][0] = -DOT(vw2->vp,vw2->hvec)/vw2->hn2; |
590 |
m4t[0][1] = vw2->vvec[0]/vw2->vn2; |
591 |
m4t[1][1] = vw2->vvec[1]/vw2->vn2; |
592 |
m4t[2][1] = vw2->vvec[2]/vw2->vn2; |
593 |
m4t[3][1] = -DOT(vw2->vp,vw2->vvec)/vw2->vn2; |
594 |
m4t[0][2] = vw2->vdir[0]; |
595 |
m4t[1][2] = vw2->vdir[1]; |
596 |
m4t[2][2] = vw2->vdir[2]; |
597 |
m4t[3][2] = -DOT(vw2->vp,vw2->vdir); |
598 |
multmat4(xfmat, xfmat, m4t); |
599 |
return(1); |
600 |
} |
601 |
|
602 |
|
603 |
static void |
604 |
addscanline( /* add scanline to output */ |
605 |
struct bound *xl, |
606 |
int y, |
607 |
COLR *pline, |
608 |
float *zline, |
609 |
struct position *lasty /* input/output */ |
610 |
) |
611 |
{ |
612 |
FVECT pos; |
613 |
struct position lastx, newpos; |
614 |
double wt; |
615 |
int x; |
616 |
|
617 |
lastx.z = 0; |
618 |
for (x = xl->max; x >= xl->min; x--) { |
619 |
pix2loc(pos, &tresolu, x, y); |
620 |
pos[2] = zline[x]; |
621 |
if ((wt = movepixel(pos)) <= FTINY) { |
622 |
lasty[x].z = lastx.z = 0; /* mark invalid */ |
623 |
continue; |
624 |
} |
625 |
/* add pixel to our image */ |
626 |
newpos.x = pos[0] * hresolu; |
627 |
newpos.y = pos[1] * vresolu; |
628 |
newpos.z = zline[x]; |
629 |
addpixel(&newpos, &lastx, &lasty[x], pline[x], wt, pos[2]); |
630 |
lasty[x].x = lastx.x = newpos.x; |
631 |
lasty[x].y = lastx.y = newpos.y; |
632 |
lasty[x].z = lastx.z = newpos.z; |
633 |
} |
634 |
} |
635 |
|
636 |
|
637 |
static void |
638 |
addpixel( /* fill in pixel parallelogram */ |
639 |
struct position *p0, |
640 |
struct position *p1, |
641 |
struct position *p2, |
642 |
COLR pix, |
643 |
double w, |
644 |
double z |
645 |
) |
646 |
{ |
647 |
double zt = 2.*zeps*p0->z; /* threshold */ |
648 |
COLOR pval; /* converted+weighted pixel */ |
649 |
int s1x, s1y, s2x, s2y; /* step sizes */ |
650 |
int l1, l2, c1, c2; /* side lengths and counters */ |
651 |
int p1isy; /* p0p1 along y? */ |
652 |
int x1, y1; /* p1 position */ |
653 |
int x, y; /* final position */ |
654 |
|
655 |
/* compute vector p0p1 */ |
656 |
if (fillo&F_FORE && ABS(p1->z-p0->z) <= zt) { |
657 |
s1x = p1->x - p0->x; |
658 |
s1y = p1->y - p0->y; |
659 |
l1 = ABS(s1x); |
660 |
if ( (p1isy = (ABS(s1y) > l1)) ) |
661 |
l1 = ABS(s1y); |
662 |
else if (l1 < 1) |
663 |
l1 = 1; |
664 |
} else { |
665 |
l1 = s1x = s1y = 1; |
666 |
p1isy = -1; |
667 |
} |
668 |
/* compute vector p0p2 */ |
669 |
if (fillo&F_FORE && ABS(p2->z-p0->z) <= zt) { |
670 |
s2x = p2->x - p0->x; |
671 |
s2y = p2->y - p0->y; |
672 |
if (p1isy == 1) |
673 |
l2 = ABS(s2x); |
674 |
else { |
675 |
l2 = ABS(s2y); |
676 |
if (p1isy != 0 && ABS(s2x) > l2) |
677 |
l2 = ABS(s2x); |
678 |
} |
679 |
if (l2 < 1) |
680 |
l2 = 1; |
681 |
} else |
682 |
l2 = s2x = s2y = 1; |
683 |
/* fill the parallelogram */ |
684 |
if (averaging) { |
685 |
colr_color(pval, pix); |
686 |
scalecolor(pval, w); |
687 |
} |
688 |
for (c1 = l1; c1-- > 0; ) { |
689 |
x1 = p0->x + c1*s1x/l1; |
690 |
y1 = p0->y + c1*s1y/l1; |
691 |
for (c2 = l2; c2-- > 0; ) { |
692 |
x = x1 + c2*s2x/l2; |
693 |
if ((x < 0) | (x >= hresolu)) |
694 |
continue; |
695 |
y = y1 + c2*s2y/l2; |
696 |
if ((y < 0) | (y >= vresolu)) |
697 |
continue; |
698 |
if (averaging) { |
699 |
if (zscan(y)[x] <= 0 || zscan(y)[x]-z |
700 |
> zeps*zscan(y)[x]) { |
701 |
copycolor(sscan(y)[x], pval); |
702 |
wscan(y)[x] = w; |
703 |
zscan(y)[x] = z; |
704 |
} else if (z-zscan(y)[x] <= zeps*zscan(y)[x]) { |
705 |
addcolor(sscan(y)[x], pval); |
706 |
wscan(y)[x] += w; |
707 |
} |
708 |
} else if (zscan(y)[x] <= 0 || zscan(y)[x]-z |
709 |
> zeps*zscan(y)[x]) { |
710 |
copycolr(pscan(y)[x], pix); |
711 |
zscan(y)[x] = z; |
712 |
} |
713 |
} |
714 |
} |
715 |
} |
716 |
|
717 |
|
718 |
static double |
719 |
movepixel( /* reposition image point */ |
720 |
FVECT pos |
721 |
) |
722 |
{ |
723 |
FVECT pt, tdir, odir; |
724 |
double d; |
725 |
|
726 |
if (pos[2] <= 0) /* empty pixel */ |
727 |
return(0); |
728 |
if (usematrix) { |
729 |
pos[0] += theirview.hoff - .5; |
730 |
pos[1] += theirview.voff - .5; |
731 |
if (normdist & (theirview.type == VT_PER)) |
732 |
d = sqrt(1. + pos[0]*pos[0]*theirview.hn2 |
733 |
+ pos[1]*pos[1]*theirview.vn2); |
734 |
else |
735 |
d = 1.; |
736 |
pos[2] += d*theirview.vfore; |
737 |
if (theirview.type == VT_PER) { |
738 |
pos[2] /= d; |
739 |
pos[0] *= pos[2]; |
740 |
pos[1] *= pos[2]; |
741 |
} |
742 |
multp3(pos, pos, theirs2ours); |
743 |
if (pos[2] <= ourview.vfore) |
744 |
return(0); |
745 |
if (ourview.type == VT_PER) { |
746 |
pos[0] /= pos[2]; |
747 |
pos[1] /= pos[2]; |
748 |
} |
749 |
pos[0] += .5 - ourview.hoff; |
750 |
pos[1] += .5 - ourview.voff; |
751 |
pos[2] -= ourview.vfore; |
752 |
} else { |
753 |
if (viewray(pt, tdir, &theirview, pos[0], pos[1]) < -FTINY) |
754 |
return(0); |
755 |
if ((!normdist) & (theirview.type == VT_PER)) /* adjust */ |
756 |
pos[2] /= DOT(theirview.vdir, tdir); |
757 |
pt[0] += tdir[0]*pos[2]; |
758 |
pt[1] += tdir[1]*pos[2]; |
759 |
pt[2] += tdir[2]*pos[2]; |
760 |
if (viewloc(pos, &ourview, pt) <= 0) |
761 |
return(0); |
762 |
} |
763 |
if ((pos[0] < 0) | (pos[0] >= 1-FTINY) | (pos[1] < 0) | (pos[1] >= 1-FTINY)) |
764 |
return(0); |
765 |
if (!averaging) |
766 |
return(1); |
767 |
/* compute pixel weight */ |
768 |
if (ourview.type == VT_PAR) { |
769 |
d = DOT(ourview.vdir,tdir); |
770 |
d = 1. - d*d; |
771 |
} else { |
772 |
VSUB(odir, pt, ourview.vp); |
773 |
d = DOT(odir,tdir); |
774 |
d = 1. - d*d/DOT(odir,odir); |
775 |
} |
776 |
if (d <= 1./MAXWT/MAXWT) |
777 |
return(MAXWT); /* clip to maximum weight */ |
778 |
return(1./sqrt(d)); |
779 |
} |
780 |
|
781 |
|
782 |
static int |
783 |
getperim( /* compute overlapping image area */ |
784 |
struct bound *xl, |
785 |
struct bound *yl, |
786 |
float *zline, |
787 |
int zfd |
788 |
) |
789 |
{ |
790 |
int step; |
791 |
FVECT pos; |
792 |
int x, y; |
793 |
/* set up step size */ |
794 |
if (scanlen(&tresolu) < numscans(&tresolu)) |
795 |
step = scanlen(&tresolu)/NSTEPS; |
796 |
else |
797 |
step = numscans(&tresolu)/NSTEPS; |
798 |
if (step < MINSTEP) { /* not worth cropping? */ |
799 |
yl->min = 0; |
800 |
yl->max = numscans(&tresolu) - 1; |
801 |
x = scanlen(&tresolu) - 1; |
802 |
for (y = numscans(&tresolu); y--; ) { |
803 |
xl[y].min = 0; |
804 |
xl[y].max = x; |
805 |
} |
806 |
return(1); |
807 |
} |
808 |
yl->min = 32000; yl->max = 0; /* search for points on image */ |
809 |
for (y = step - 1; y < numscans(&tresolu); y += step) { |
810 |
if (zfd != -1) { |
811 |
if (lseek(zfd, (off_t)y*scanlen(&tresolu)*sizeof(float), |
812 |
SEEK_SET) < 0) |
813 |
syserror("lseek"); |
814 |
if (read(zfd, (char *)zline, |
815 |
scanlen(&tresolu)*sizeof(float)) |
816 |
< scanlen(&tresolu)*sizeof(float)) |
817 |
syserror("read"); |
818 |
} |
819 |
xl[y].min = 32000; xl[y].max = 0; /* x max */ |
820 |
for (x = scanlen(&tresolu); (x -= step) > 0; ) { |
821 |
pix2loc(pos, &tresolu, x, y); |
822 |
pos[2] = zline[x]; |
823 |
if (movepixel(pos) > FTINY) { |
824 |
xl[y].max = x + step - 1; |
825 |
xl[y].min = x - step + 1; /* x min */ |
826 |
if (xl[y].min < 0) |
827 |
xl[y].min = 0; |
828 |
for (x = step - 1; x < xl[y].max; x += step) { |
829 |
pix2loc(pos, &tresolu, x, y); |
830 |
pos[2] = zline[x]; |
831 |
if (movepixel(pos) > FTINY) { |
832 |
xl[y].min = x - step + 1; |
833 |
break; |
834 |
} |
835 |
} |
836 |
if (y < yl->min) /* y limits */ |
837 |
yl->min = y - step + 1; |
838 |
yl->max = y + step - 1; |
839 |
break; |
840 |
} |
841 |
} |
842 |
/* fill in between */ |
843 |
if (y < step) { |
844 |
xl[y-1].min = xl[y].min; |
845 |
xl[y-1].max = xl[y].max; |
846 |
} else { |
847 |
if (xl[y].min < xl[y-step].min) |
848 |
xl[y-1].min = xl[y].min; |
849 |
else |
850 |
xl[y-1].min = xl[y-step].min; |
851 |
if (xl[y].max > xl[y-step].max) |
852 |
xl[y-1].max = xl[y].max; |
853 |
else |
854 |
xl[y-1].max = xl[y-step].max; |
855 |
} |
856 |
for (x = 2; x < step; x++) |
857 |
*(xl+y-x) = *(xl+y-1); |
858 |
} |
859 |
if (yl->max >= numscans(&tresolu)) |
860 |
yl->max = numscans(&tresolu) - 1; |
861 |
y -= step; |
862 |
for (x = numscans(&tresolu) - 1; x > y; x--) /* fill bottom rows */ |
863 |
*(xl+x) = *(xl+y); |
864 |
return(yl->max >= yl->min); |
865 |
} |
866 |
|
867 |
|
868 |
static void |
869 |
backpicture( /* background fill algorithm */ |
870 |
fillfunc_t *fill, |
871 |
int samp |
872 |
) |
873 |
{ |
874 |
int *yback, xback; |
875 |
int y; |
876 |
int x, i; |
877 |
/* get back buffer */ |
878 |
yback = (int *)malloc(hresolu*sizeof(int)); |
879 |
if (yback == NULL) |
880 |
syserror(progname); |
881 |
for (x = 0; x < hresolu; x++) |
882 |
yback[x] = -2; |
883 |
/* |
884 |
* Xback and yback are the pixel locations of suitable |
885 |
* background values in each direction. |
886 |
* A value of -2 means unassigned, and -1 means |
887 |
* that there is no suitable background in this direction. |
888 |
*/ |
889 |
/* fill image */ |
890 |
for (y = 0; y < vresolu; y++) { |
891 |
xback = -2; |
892 |
for (x = 0; x < hresolu; x++) |
893 |
if (zscan(y)[x] <= 0) { /* empty pixel */ |
894 |
/* |
895 |
* First, find background from above or below. |
896 |
* (farthest assigned pixel) |
897 |
*/ |
898 |
if (yback[x] == -2) { |
899 |
for (i = y+1; i < vresolu; i++) |
900 |
if (zscan(i)[x] > 0) |
901 |
break; |
902 |
if (i < vresolu |
903 |
&& (y <= 0 || zscan(y-1)[x] < zscan(i)[x])) |
904 |
yback[x] = i; |
905 |
else |
906 |
yback[x] = y-1; |
907 |
} |
908 |
/* |
909 |
* Next, find background from left or right. |
910 |
*/ |
911 |
if (xback == -2) { |
912 |
for (i = x+1; i < hresolu; i++) |
913 |
if (zscan(y)[i] > 0) |
914 |
break; |
915 |
if (i < hresolu |
916 |
&& (x <= 0 || zscan(y)[x-1] < zscan(y)[i])) |
917 |
xback = i; |
918 |
else |
919 |
xback = x-1; |
920 |
} |
921 |
/* |
922 |
* If we have no background for this pixel, |
923 |
* use the given fill function. |
924 |
*/ |
925 |
if (xback < 0 && yback[x] < 0) |
926 |
goto fillit; |
927 |
/* |
928 |
* Compare, and use the background that is |
929 |
* farther, unless one of them is next to us. |
930 |
* If the background is too distant, call |
931 |
* the fill function. |
932 |
*/ |
933 |
if ( yback[x] < 0 |
934 |
|| (xback >= 0 && ABS(x-xback) <= 1) |
935 |
|| ( ABS(y-yback[x]) > 1 |
936 |
&& zscan(yback[x])[x] |
937 |
< zscan(y)[xback] ) ) { |
938 |
if (samp > 0 && ABS(x-xback) >= samp) |
939 |
goto fillit; |
940 |
if (averaging) { |
941 |
copycolor(sscan(y)[x], |
942 |
sscan(y)[xback]); |
943 |
wscan(y)[x] = wscan(y)[xback]; |
944 |
} else |
945 |
copycolr(pscan(y)[x], |
946 |
pscan(y)[xback]); |
947 |
zscan(y)[x] = zscan(y)[xback]; |
948 |
} else { |
949 |
if (samp > 0 && ABS(y-yback[x]) > samp) |
950 |
goto fillit; |
951 |
if (averaging) { |
952 |
copycolor(sscan(y)[x], |
953 |
sscan(yback[x])[x]); |
954 |
wscan(y)[x] = |
955 |
wscan(yback[x])[x]; |
956 |
} else |
957 |
copycolr(pscan(y)[x], |
958 |
pscan(yback[x])[x]); |
959 |
zscan(y)[x] = zscan(yback[x])[x]; |
960 |
} |
961 |
continue; |
962 |
fillit: |
963 |
(*fill)(x,y); |
964 |
if (fill == rcalfill) { /* use it */ |
965 |
clearqueue(); |
966 |
xback = x; |
967 |
yback[x] = y; |
968 |
} |
969 |
} else { /* full pixel */ |
970 |
yback[x] = -2; |
971 |
xback = -2; |
972 |
} |
973 |
} |
974 |
free((void *)yback); |
975 |
} |
976 |
|
977 |
|
978 |
static void |
979 |
fillpicture( /* paint in empty pixels using fill */ |
980 |
fillfunc_t *fill |
981 |
) |
982 |
{ |
983 |
int x, y; |
984 |
|
985 |
for (y = 0; y < vresolu; y++) |
986 |
for (x = 0; x < hresolu; x++) |
987 |
if (zscan(y)[x] <= 0) |
988 |
(*fill)(x,y); |
989 |
if (fill == rcalfill) |
990 |
clearqueue(); |
991 |
} |
992 |
|
993 |
|
994 |
static int |
995 |
clipaft(void) /* perform aft clipping as indicated */ |
996 |
{ |
997 |
int x, y; |
998 |
int adjtest = (ourview.type == VT_PER) & zisnorm; |
999 |
double tstdist; |
1000 |
double yzn2, vx; |
1001 |
|
1002 |
if (ourview.vaft <= FTINY) |
1003 |
return(0); |
1004 |
tstdist = ourview.vaft - ourview.vfore; |
1005 |
for (y = 0; y < vresolu; y++) { |
1006 |
if (adjtest) { /* adjust test */ |
1007 |
yzn2 = (y+.5)/vresolu + ourview.voff - .5; |
1008 |
yzn2 = 1. + yzn2*yzn2*ourview.vn2; |
1009 |
tstdist = (ourview.vaft - ourview.vfore)*sqrt(yzn2); |
1010 |
} |
1011 |
for (x = 0; x < hresolu; x++) |
1012 |
if (zscan(y)[x] > tstdist) { |
1013 |
if (adjtest) { |
1014 |
vx = (x+.5)/hresolu + ourview.hoff - .5; |
1015 |
if (zscan(y)[x] <= (ourview.vaft - |
1016 |
ourview.vfore) * |
1017 |
sqrt(vx*vx*ourview.hn2 + yzn2)) |
1018 |
continue; |
1019 |
} |
1020 |
if (averaging) |
1021 |
memset(sscan(y)[x], '\0', sizeof(COLOR)); |
1022 |
else |
1023 |
memset(pscan(y)[x], '\0', sizeof(COLR)); |
1024 |
zscan(y)[x] = 0.0; |
1025 |
} |
1026 |
} |
1027 |
return(1); |
1028 |
} |
1029 |
|
1030 |
|
1031 |
static int |
1032 |
addblur(void) /* add to blurred picture */ |
1033 |
{ |
1034 |
COLOR cval; |
1035 |
double d; |
1036 |
int i; |
1037 |
|
1038 |
if (!blurring) |
1039 |
return(0); |
1040 |
i = hresolu*vresolu; |
1041 |
if (nvavg < 2) |
1042 |
if (averaging) |
1043 |
while (i--) { |
1044 |
copycolor(ourbpict[i], ourspict[i]); |
1045 |
d = 1.0/ourweigh[i]; |
1046 |
scalecolor(ourbpict[i], d); |
1047 |
} |
1048 |
else |
1049 |
while (i--) |
1050 |
colr_color(ourbpict[i], ourpict[i]); |
1051 |
else |
1052 |
if (averaging) |
1053 |
while (i--) { |
1054 |
copycolor(cval, ourspict[i]); |
1055 |
d = 1.0/ourweigh[i]; |
1056 |
scalecolor(cval, d); |
1057 |
addcolor(ourbpict[i], cval); |
1058 |
} |
1059 |
else |
1060 |
while (i--) { |
1061 |
colr_color(cval, ourpict[i]); |
1062 |
addcolor(ourbpict[i], cval); |
1063 |
} |
1064 |
/* print view */ |
1065 |
printf("VIEW%d:", nvavg); |
1066 |
fprintview(&ourview, stdout); |
1067 |
putchar('\n'); |
1068 |
return(1); |
1069 |
} |
1070 |
|
1071 |
|
1072 |
static void |
1073 |
writepicture(void) /* write out picture (alters buffer) */ |
1074 |
{ |
1075 |
int y; |
1076 |
int x; |
1077 |
double d; |
1078 |
|
1079 |
fprtresolu(hresolu, vresolu, stdout); |
1080 |
for (y = vresolu-1; y >= 0; y--) |
1081 |
if (blurring) { |
1082 |
for (x = 0; x < hresolu; x++) { /* compute avg. */ |
1083 |
d = rexpadj/nvavg; |
1084 |
scalecolor(bscan(y)[x], d); |
1085 |
} |
1086 |
if (fwritescan(bscan(y), hresolu, stdout) < 0) |
1087 |
syserror(progname); |
1088 |
} else if (averaging) { |
1089 |
for (x = 0; x < hresolu; x++) { /* average pixels */ |
1090 |
d = rexpadj/wscan(y)[x]; |
1091 |
scalecolor(sscan(y)[x], d); |
1092 |
} |
1093 |
if (fwritescan(sscan(y), hresolu, stdout) < 0) |
1094 |
syserror(progname); |
1095 |
} else { |
1096 |
if (expadj) |
1097 |
shiftcolrs(pscan(y), hresolu, expadj); |
1098 |
if (fwritecolrs(pscan(y), hresolu, stdout) < 0) |
1099 |
syserror(progname); |
1100 |
} |
1101 |
} |
1102 |
|
1103 |
|
1104 |
static void |
1105 |
writedistance( /* write out z file (alters buffer) */ |
1106 |
char *fname |
1107 |
) |
1108 |
{ |
1109 |
int donorm = normdist & !zisnorm ? 1 : |
1110 |
(ourview.type == VT_PER) & !normdist & zisnorm ? -1 : 0; |
1111 |
int fd; |
1112 |
int y; |
1113 |
|
1114 |
if ((fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) == -1) |
1115 |
syserror(fname); |
1116 |
for (y = vresolu-1; y >= 0; y--) { |
1117 |
if (donorm) { |
1118 |
double vx, yzn2, d; |
1119 |
int x; |
1120 |
yzn2 = (y+.5)/vresolu + ourview.voff - .5; |
1121 |
yzn2 = 1. + yzn2*yzn2*ourview.vn2; |
1122 |
for (x = 0; x < hresolu; x++) { |
1123 |
vx = (x+.5)/hresolu + ourview.hoff - .5; |
1124 |
d = sqrt(vx*vx*ourview.hn2 + yzn2); |
1125 |
if (donorm > 0) |
1126 |
zscan(y)[x] *= d; |
1127 |
else |
1128 |
zscan(y)[x] /= d; |
1129 |
} |
1130 |
} |
1131 |
if (write(fd, (char *)zscan(y), hresolu*sizeof(float)) |
1132 |
< hresolu*sizeof(float)) |
1133 |
syserror(fname); |
1134 |
} |
1135 |
close(fd); |
1136 |
} |
1137 |
|
1138 |
|
1139 |
static void |
1140 |
backfill( /* fill pixel with background */ |
1141 |
int x, |
1142 |
int y |
1143 |
) |
1144 |
{ |
1145 |
if (averaging) { |
1146 |
copycolor(sscan(y)[x], backcolor); |
1147 |
wscan(y)[x] = 1; |
1148 |
} else |
1149 |
copycolr(pscan(y)[x], backcolr); |
1150 |
zscan(y)[x] = backz; |
1151 |
} |
1152 |
|
1153 |
|
1154 |
static void |
1155 |
calstart( /* start fill calculation */ |
1156 |
char *prog, |
1157 |
char *args |
1158 |
) |
1159 |
{ |
1160 |
char combuf[512]; |
1161 |
char *argv[64]; |
1162 |
int rval; |
1163 |
char **wp, *cp; |
1164 |
|
1165 |
if (PDesc.running) { |
1166 |
fprintf(stderr, "%s: too many calculations\n", progname); |
1167 |
exit(1); |
1168 |
} |
1169 |
strcpy(combuf, prog); |
1170 |
strcat(combuf, args); |
1171 |
cp = combuf; |
1172 |
wp = argv; |
1173 |
for ( ; ; ) { |
1174 |
while (isspace(*cp)) /* nullify spaces */ |
1175 |
*cp++ = '\0'; |
1176 |
if (!*cp) /* all done? */ |
1177 |
break; |
1178 |
*wp++ = cp; /* add argument to list */ |
1179 |
while (*++cp && !isspace(*cp)) |
1180 |
; |
1181 |
} |
1182 |
*wp = NULL; |
1183 |
/* start process */ |
1184 |
if ((rval = open_process(&PDesc, argv)) < 0) |
1185 |
syserror(progname); |
1186 |
if (rval == 0) { |
1187 |
fprintf(stderr, "%s: command not found\n", argv[0]); |
1188 |
exit(1); |
1189 |
} |
1190 |
packsiz = rval/(6*sizeof(float)) - 1; |
1191 |
if (packsiz > PACKSIZ) |
1192 |
packsiz = PACKSIZ; |
1193 |
queuesiz = 0; |
1194 |
} |
1195 |
|
1196 |
|
1197 |
static void |
1198 |
caldone(void) /* done with calculation */ |
1199 |
{ |
1200 |
if (!PDesc.running) |
1201 |
return; |
1202 |
clearqueue(); |
1203 |
close_process(&PDesc); |
1204 |
} |
1205 |
|
1206 |
|
1207 |
static void |
1208 |
rcalfill( /* fill with ray-calculated pixel */ |
1209 |
int x, |
1210 |
int y |
1211 |
) |
1212 |
{ |
1213 |
if (queuesiz >= packsiz) /* flush queue if needed */ |
1214 |
clearqueue(); |
1215 |
/* add position to queue */ |
1216 |
queue[queuesiz][0] = x; |
1217 |
queue[queuesiz][1] = y; |
1218 |
queuesiz++; |
1219 |
} |
1220 |
|
1221 |
|
1222 |
static void |
1223 |
clearqueue(void) /* process queue */ |
1224 |
{ |
1225 |
FVECT orig, dir; |
1226 |
float fbuf[6*(PACKSIZ+1)]; |
1227 |
float *fbp; |
1228 |
int i; |
1229 |
double vx, vy; |
1230 |
|
1231 |
if (queuesiz == 0) |
1232 |
return; |
1233 |
fbp = fbuf; |
1234 |
for (i = 0; i < queuesiz; i++) { |
1235 |
viewray(orig, dir, &ourview, |
1236 |
(queue[i][0]+.5)/hresolu, |
1237 |
(queue[i][1]+.5)/vresolu); |
1238 |
*fbp++ = orig[0]; *fbp++ = orig[1]; *fbp++ = orig[2]; |
1239 |
*fbp++ = dir[0]; *fbp++ = dir[1]; *fbp++ = dir[2]; |
1240 |
} |
1241 |
/* mark end and get results */ |
1242 |
memset((char *)fbp, '\0', 6*sizeof(float)); |
1243 |
if (process(&PDesc, (char *)fbuf, (char *)fbuf, |
1244 |
4*sizeof(float)*(queuesiz+1), |
1245 |
6*sizeof(float)*(queuesiz+1)) != |
1246 |
4*sizeof(float)*(queuesiz+1)) { |
1247 |
fprintf(stderr, "%s: error reading from rtrace process\n", |
1248 |
progname); |
1249 |
exit(1); |
1250 |
} |
1251 |
fbp = fbuf; |
1252 |
for (i = 0; i < queuesiz; i++) { |
1253 |
if (ourexp > 0 && ourexp != 1.0) { |
1254 |
fbp[0] *= ourexp; |
1255 |
fbp[1] *= ourexp; |
1256 |
fbp[2] *= ourexp; |
1257 |
} |
1258 |
if (averaging) { |
1259 |
setcolor(sscan(queue[i][1])[queue[i][0]], |
1260 |
fbp[0], fbp[1], fbp[2]); |
1261 |
wscan(queue[i][1])[queue[i][0]] = 1; |
1262 |
} else |
1263 |
setcolr(pscan(queue[i][1])[queue[i][0]], |
1264 |
fbp[0], fbp[1], fbp[2]); |
1265 |
if (zisnorm) |
1266 |
zscan(queue[i][1])[queue[i][0]] = fbp[3]; |
1267 |
else { |
1268 |
vx = (queue[i][0]+.5)/hresolu + ourview.hoff - .5; |
1269 |
vy = (queue[i][1]+.5)/vresolu + ourview.voff - .5; |
1270 |
zscan(queue[i][1])[queue[i][0]] = fbp[3] / sqrt(1. + |
1271 |
vx*vx*ourview.hn2 + vy*vy*ourview.vn2); |
1272 |
} |
1273 |
fbp += 4; |
1274 |
} |
1275 |
queuesiz = 0; |
1276 |
} |
1277 |
|
1278 |
|
1279 |
static void |
1280 |
syserror( /* report error and exit */ |
1281 |
char *s |
1282 |
) |
1283 |
{ |
1284 |
perror(s); |
1285 |
exit(1); |
1286 |
} |