17 |
|
#define pscan(y) (ourpict+(y)*ourview.hresolu) |
18 |
|
#define zscan(y) (ourzbuf+(y)*ourview.hresolu) |
19 |
|
|
20 |
+ |
#define F_FORE 1 /* fill foreground */ |
21 |
+ |
#define F_BACK 2 /* fill background */ |
22 |
+ |
|
23 |
|
#define ABS(x) ((x)>0?(x):-(x)) |
24 |
|
|
25 |
|
VIEW ourview = STDVIEW(512); /* desired view */ |
34 |
|
VIEW theirview = STDVIEW(512); /* input view */ |
35 |
|
int gotview; /* got input view? */ |
36 |
|
|
37 |
+ |
int fill = F_FORE|F_BACK; /* selected fill algorithm */ |
38 |
+ |
extern int backfill(); /* fill functions */ |
39 |
+ |
int (*deffill)() = backfill; /* selected fill function */ |
40 |
+ |
COLR backcolr = BLKCOLR; /* background color */ |
41 |
+ |
|
42 |
|
double theirs2ours[4][4]; /* transformation matrix */ |
43 |
< |
int regdist = 0; /* regular distance? */ |
43 |
> |
int normdist = 1; /* normalized distance? */ |
44 |
|
|
45 |
|
|
46 |
|
main(argc, argv) /* interpolate pictures */ |
48 |
|
char *argv[]; |
49 |
|
{ |
50 |
|
#define check(olen,narg) if (argv[i][olen] || narg >= argc-i) goto badopt |
51 |
+ |
extern double atof(); |
52 |
|
int gotvfile = 0; |
53 |
+ |
char *zfile = NULL; |
54 |
|
char *err; |
55 |
|
int i; |
56 |
|
|
62 |
|
check(2,1); |
63 |
|
zeps = atof(argv[++i]); |
64 |
|
break; |
65 |
< |
case 'r': /* regular distance */ |
65 |
> |
case 'n': /* dist. normalized? */ |
66 |
|
check(2,0); |
67 |
< |
regdist = !regdist; |
67 |
> |
normdist = !normdist; |
68 |
|
break; |
69 |
+ |
case 'f': /* fill type */ |
70 |
+ |
switch (argv[i][2]) { |
71 |
+ |
case '0': /* none */ |
72 |
+ |
check(3,0); |
73 |
+ |
fill = 0; |
74 |
+ |
break; |
75 |
+ |
case 'f': /* foreground */ |
76 |
+ |
check(3,0); |
77 |
+ |
fill = F_FORE; |
78 |
+ |
break; |
79 |
+ |
case 'b': /* background */ |
80 |
+ |
check(3,0); |
81 |
+ |
fill = F_BACK; |
82 |
+ |
break; |
83 |
+ |
case 'a': /* all */ |
84 |
+ |
check(3,0); |
85 |
+ |
fill = F_FORE|F_BACK; |
86 |
+ |
break; |
87 |
+ |
case 'c': /* color */ |
88 |
+ |
check(3,3); |
89 |
+ |
deffill = backfill; |
90 |
+ |
setcolr(backcolr, atof(argv[i+1]), |
91 |
+ |
atof(argv[i+2]), atof(argv[i+3])); |
92 |
+ |
i += 3; |
93 |
+ |
break; |
94 |
+ |
default: |
95 |
+ |
goto badopt; |
96 |
+ |
} |
97 |
+ |
break; |
98 |
+ |
case 'z': /* z file */ |
99 |
+ |
check(2,1); |
100 |
+ |
zfile = argv[++i]; |
101 |
+ |
break; |
102 |
|
case 'x': /* x resolution */ |
103 |
|
check(2,1); |
104 |
|
ourview.hresolu = atoi(argv[++i]); |
170 |
|
exit(1); |
171 |
|
} |
172 |
|
/* allocate frame */ |
173 |
< |
ourpict = (COLR *)calloc(ourview.hresolu*ourview.vresolu,sizeof(COLR)); |
173 |
> |
ourpict = (COLR *)malloc(ourview.hresolu*ourview.vresolu*sizeof(COLR)); |
174 |
|
ourzbuf = (float *)calloc(ourview.hresolu*ourview.vresolu,sizeof(float)); |
175 |
|
if (ourpict == NULL || ourzbuf == NULL) { |
176 |
|
perror(progname); |
180 |
|
for ( ; i < argc; i += 2) |
181 |
|
addpicture(argv[i], argv[i+1]); |
182 |
|
/* fill in spaces */ |
183 |
< |
fillpicture(); |
183 |
> |
if (fill&F_BACK) |
184 |
> |
backpicture(); |
185 |
> |
else |
186 |
> |
fillpicture(); |
187 |
|
/* add to header */ |
188 |
|
printargs(argc, argv, stdout); |
189 |
|
if (gotvfile) { |
192 |
|
printf("\n"); |
193 |
|
} |
194 |
|
printf("\n"); |
195 |
< |
/* write output */ |
195 |
> |
/* write picture */ |
196 |
|
writepicture(); |
197 |
+ |
/* write z file */ |
198 |
+ |
if (zfile != NULL) |
199 |
+ |
writedistance(zfile); |
200 |
|
|
201 |
|
exit(0); |
202 |
|
userr: |
203 |
|
fprintf(stderr, |
204 |
< |
"Usage: %s [view opts][-t zthresh][-r] pfile zspec ..\n", |
204 |
> |
"Usage: %s [view opts][-t zthresh][-z zout][-fT][-n] pfile zspec ..\n", |
205 |
|
progname); |
206 |
|
exit(1); |
207 |
|
#undef check |
343 |
|
int *lasty; /* input/output */ |
344 |
|
float *lastyz; /* input/output */ |
345 |
|
{ |
346 |
< |
extern double sqrt(), fabs(); |
346 |
> |
extern double sqrt(); |
347 |
|
double pos[3]; |
348 |
|
int lastx = 0; |
349 |
|
double lastxz = 0; |
356 |
|
pos[1] = y - .5*(theirview.vresolu-1); |
357 |
|
pos[2] = zline[x]; |
358 |
|
if (theirview.type == VT_PER) { |
359 |
< |
if (!regdist) /* adjust for eye-ray distance */ |
359 |
> |
if (normdist) /* adjust for eye-ray distance */ |
360 |
|
pos[2] /= sqrt( 1. |
361 |
|
+ pos[0]*pos[0]*theirview.vhn2 |
362 |
|
+ pos[1]*pos[1]*theirview.vvn2 ); |
378 |
|
/* add pixel to our image */ |
379 |
|
zt = 2.*zeps*zline[x]; |
380 |
|
addpixel(xpos, ypos, |
381 |
< |
(fabs(zline[x]-lastxz) <= zt) ? lastx - xpos : 1, |
382 |
< |
(fabs(zline[x]-lastyz[x]) <= zt) ? lasty[x] - ypos : 1, |
381 |
> |
(fill&F_FORE && ABS(zline[x]-lastxz) <= zt) |
382 |
> |
? lastx - xpos : 1, |
383 |
> |
(fill&F_FORE && ABS(zline[x]-lastyz[x]) <= zt) |
384 |
> |
? lasty[x] - ypos : 1, |
385 |
|
pline[x], pos[2]); |
386 |
|
lastx = xpos; |
387 |
|
lasty[x] = ypos; |
419 |
|
} |
420 |
|
|
421 |
|
|
422 |
< |
fillpicture() /* fill in empty spaces */ |
422 |
> |
backpicture() /* background fill algorithm */ |
423 |
|
{ |
424 |
|
int *yback, xback; |
425 |
|
int y; |
462 |
|
* Next, find background from left or right. |
463 |
|
*/ |
464 |
|
if (xback == -2) { |
465 |
< |
for (i = x+1; x < ourview.hresolu; i++) |
465 |
> |
for (i = x+1; i < ourview.hresolu; i++) |
466 |
|
if (zscan(y)[i] > 0) |
467 |
|
break; |
468 |
|
if (i < ourview.hresolu |
471 |
|
else |
472 |
|
xback = x-1; |
473 |
|
} |
423 |
– |
if (xback < 0 && yback[x] < 0) |
424 |
– |
continue; /* no background */ |
474 |
|
/* |
475 |
+ |
* Check to see if we have no background for |
476 |
+ |
* this pixel. If not, use background color. |
477 |
+ |
*/ |
478 |
+ |
if (xback < 0 && yback[x] < 0) { |
479 |
+ |
(*deffill)(x,y); |
480 |
+ |
continue; |
481 |
+ |
} |
482 |
+ |
/* |
483 |
|
* Compare, and use the background that is |
484 |
|
* farther, unless one of them is next to us. |
485 |
|
*/ |
486 |
< |
if (yback[x] < 0 || ABS(x-xback) <= 1 |
486 |
> |
if ( yback[x] < 0 |
487 |
> |
|| (xback >= 0 && ABS(x-xback) <= 1) |
488 |
|
|| ( ABS(y-yback[x]) > 1 |
489 |
< |
&& zscan(yback[x])[x] < zscan(y)[xback] )) |
489 |
> |
&& zscan(yback[x])[x] |
490 |
> |
< zscan(y)[xback] ) ) |
491 |
|
copycolr(pscan(y)[x],pscan(y)[xback]); |
492 |
|
else |
493 |
|
copycolr(pscan(y)[x],pscan(yback[x])[x]); |
500 |
|
} |
501 |
|
|
502 |
|
|
503 |
+ |
fillpicture() /* paint in empty pixels with default */ |
504 |
+ |
{ |
505 |
+ |
register int x, y; |
506 |
+ |
|
507 |
+ |
for (y = 0; y < ourview.vresolu; y++) |
508 |
+ |
for (x = 0; x < ourview.hresolu; x++) |
509 |
+ |
if (zscan(y)[x] <= 0) |
510 |
+ |
(*deffill)(x,y); |
511 |
+ |
} |
512 |
+ |
|
513 |
+ |
|
514 |
|
writepicture() /* write out picture */ |
515 |
|
{ |
516 |
|
int y; |
524 |
|
} |
525 |
|
|
526 |
|
|
527 |
+ |
writedistance(fname) /* write out z file */ |
528 |
+ |
char *fname; |
529 |
+ |
{ |
530 |
+ |
extern double sqrt(); |
531 |
+ |
int donorm = normdist && ourview.type == VT_PER; |
532 |
+ |
FILE *fp; |
533 |
+ |
int y; |
534 |
+ |
float *zout; |
535 |
+ |
|
536 |
+ |
if ((fp = fopen(fname, "w")) == NULL) { |
537 |
+ |
perror(fname); |
538 |
+ |
exit(1); |
539 |
+ |
} |
540 |
+ |
if (donorm |
541 |
+ |
&& (zout = (float *)malloc(ourview.hresolu*sizeof(float))) == NULL) { |
542 |
+ |
perror(progname); |
543 |
+ |
exit(1); |
544 |
+ |
} |
545 |
+ |
for (y = ourview.vresolu-1; y >= 0; y--) { |
546 |
+ |
if (donorm) { |
547 |
+ |
double vx, yzn2; |
548 |
+ |
register int x; |
549 |
+ |
yzn2 = y - .5*(ourview.vresolu-1); |
550 |
+ |
yzn2 = 1. + yzn2*yzn2*ourview.vvn2; |
551 |
+ |
for (x = 0; x < ourview.hresolu; x++) { |
552 |
+ |
vx = x - .5*(ourview.hresolu-1); |
553 |
+ |
zout[x] = zscan(y)[x] |
554 |
+ |
* sqrt(vx*vx*ourview.vhn2 + yzn2); |
555 |
+ |
} |
556 |
+ |
} else |
557 |
+ |
zout = zscan(y); |
558 |
+ |
if (fwrite(zout, sizeof(float), ourview.hresolu, fp) |
559 |
+ |
< ourview.hresolu) { |
560 |
+ |
perror(fname); |
561 |
+ |
exit(1); |
562 |
+ |
} |
563 |
+ |
} |
564 |
+ |
if (donorm) |
565 |
+ |
free((char *)zout); |
566 |
+ |
fclose(fp); |
567 |
+ |
} |
568 |
+ |
|
569 |
+ |
|
570 |
|
isfloat(s) /* see if string is floating number */ |
571 |
|
register char *s; |
572 |
|
{ |
575 |
|
&& *s != 'e' && *s != 'E' && *s != '+') |
576 |
|
return(0); |
577 |
|
return(1); |
578 |
+ |
} |
579 |
+ |
|
580 |
+ |
|
581 |
+ |
backfill(x, y) /* fill pixel with background */ |
582 |
+ |
int x, y; |
583 |
+ |
{ |
584 |
+ |
register BYTE *dest = pscan(y)[x]; |
585 |
+ |
|
586 |
+ |
copycolr(dest, backcolr); |
587 |
|
} |