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 */ |
20 |
> |
#define F_FORE 1 /* fill foreground */ |
21 |
> |
#define F_BACK 2 /* fill background */ |
22 |
|
|
23 |
+ |
#define PACKSIZ 42 /* calculation packet size */ |
24 |
+ |
|
25 |
+ |
#define RTCOM "rtrace -h -ovl -fff -x %d %s" |
26 |
+ |
|
27 |
|
#define ABS(x) ((x)>0?(x):-(x)) |
28 |
|
|
29 |
|
VIEW ourview = STDVIEW(512); /* desired view */ |
39 |
|
int gotview; /* got input view? */ |
40 |
|
|
41 |
|
int fill = F_FORE|F_BACK; /* selected fill algorithm */ |
42 |
< |
extern int backfill(); /* fill functions */ |
42 |
> |
extern int backfill(), calfill(); /* fill functions */ |
43 |
|
int (*deffill)() = backfill; /* selected fill function */ |
44 |
|
COLR backcolr = BLKCOLR; /* background color */ |
45 |
+ |
double backz = 0.0; /* background z value */ |
46 |
|
|
47 |
|
double theirs2ours[4][4]; /* transformation matrix */ |
48 |
|
int normdist = 1; /* normalized distance? */ |
49 |
|
|
50 |
+ |
FILE *psend, *precv; /* pipes to/from fill calculation */ |
51 |
+ |
int childpid; /* child's process id */ |
52 |
+ |
int queue[PACKSIZ][2]; /* pending pixels */ |
53 |
+ |
int queuesiz; /* number of pixels pending */ |
54 |
|
|
55 |
+ |
|
56 |
|
main(argc, argv) /* interpolate pictures */ |
57 |
|
int argc; |
58 |
|
char *argv[]; |
101 |
|
atof(argv[i+2]), atof(argv[i+3])); |
102 |
|
i += 3; |
103 |
|
break; |
104 |
+ |
case 'z': /* z value */ |
105 |
+ |
check(3,1); |
106 |
+ |
deffill = backfill; |
107 |
+ |
backz = atof(argv[++i]); |
108 |
+ |
break; |
109 |
+ |
case 'r': /* rtrace */ |
110 |
+ |
check(3,1); |
111 |
+ |
deffill = calfill; |
112 |
+ |
calstart(RTCOM, argv[++i]); |
113 |
+ |
break; |
114 |
|
default: |
115 |
|
goto badopt; |
116 |
|
} |
182 |
|
goto userr; |
183 |
|
} |
184 |
|
/* check arguments */ |
185 |
< |
if (argc-i < 2 || (argc-i)%2) |
185 |
> |
if ((argc-i)%2) |
186 |
|
goto userr; |
187 |
|
/* set view */ |
188 |
|
if (err = setview(&ourview)) { |
204 |
|
backpicture(); |
205 |
|
else |
206 |
|
fillpicture(); |
207 |
+ |
/* close calculation */ |
208 |
+ |
if (deffill == calfill) |
209 |
+ |
caldone(); |
210 |
|
/* add to header */ |
211 |
|
printargs(argc, argv, stdout); |
212 |
|
if (gotvfile) { |
510 |
|
|| (xback >= 0 && ABS(x-xback) <= 1) |
511 |
|
|| ( ABS(y-yback[x]) > 1 |
512 |
|
&& zscan(yback[x])[x] |
513 |
< |
< zscan(y)[xback] ) ) |
513 |
> |
< zscan(y)[xback] ) ) { |
514 |
|
copycolr(pscan(y)[x],pscan(y)[xback]); |
515 |
< |
else |
515 |
> |
zscan(y)[x] = zscan(y)[xback]; |
516 |
> |
} else { |
517 |
|
copycolr(pscan(y)[x],pscan(yback[x])[x]); |
518 |
+ |
zscan(y)[x] = zscan(yback[x])[x]; |
519 |
+ |
} |
520 |
|
} else { /* full pixel */ |
521 |
|
yback[x] = -2; |
522 |
|
xback = -2; |
610 |
|
register BYTE *dest = pscan(y)[x]; |
611 |
|
|
612 |
|
copycolr(dest, backcolr); |
613 |
+ |
zscan(y)[x] = backz; |
614 |
+ |
} |
615 |
+ |
|
616 |
+ |
|
617 |
+ |
calstart(prog, args) /* start fill calculation */ |
618 |
+ |
char *prog, *args; |
619 |
+ |
{ |
620 |
+ |
char combuf[512]; |
621 |
+ |
int p0[2], p1[2]; |
622 |
+ |
|
623 |
+ |
sprintf(combuf, prog, PACKSIZ, args); |
624 |
+ |
if (pipe(p0) < 0 || pipe(p1) < 0) |
625 |
+ |
goto syserr; |
626 |
+ |
if ((childpid = vfork()) == 0) { /* fork calculation */ |
627 |
+ |
close(p0[1]); |
628 |
+ |
close(p1[0]); |
629 |
+ |
if (p0[0] != 0) { |
630 |
+ |
dup2(p0[0], 0); |
631 |
+ |
close(p0[0]); |
632 |
+ |
} |
633 |
+ |
if (p1[1] != 1) { |
634 |
+ |
dup2(p1[1], 1); |
635 |
+ |
close(p1[1]); |
636 |
+ |
} |
637 |
+ |
execl("/bin/sh", "sh", "-c", combuf, 0); |
638 |
+ |
perror("/bin/sh"); |
639 |
+ |
_exit(127); |
640 |
+ |
} |
641 |
+ |
if (childpid < 0) |
642 |
+ |
goto syserr; |
643 |
+ |
close(p0[0]); |
644 |
+ |
close(p1[1]); |
645 |
+ |
if ((psend = fdopen(p0[1], "w")) == NULL) |
646 |
+ |
goto syserr; |
647 |
+ |
if ((precv = fdopen(p1[0], "r")) == NULL) |
648 |
+ |
goto syserr; |
649 |
+ |
queuesiz = 0; |
650 |
+ |
return; |
651 |
+ |
syserr: |
652 |
+ |
perror(progname); |
653 |
+ |
exit(1); |
654 |
+ |
} |
655 |
+ |
|
656 |
+ |
|
657 |
+ |
caldone() /* done with calculation */ |
658 |
+ |
{ |
659 |
+ |
int pid; |
660 |
+ |
|
661 |
+ |
fclose(psend); |
662 |
+ |
clearqueue(); |
663 |
+ |
fclose(precv); |
664 |
+ |
while ((pid = wait(0)) != -1 && pid != childpid) |
665 |
+ |
; |
666 |
+ |
} |
667 |
+ |
|
668 |
+ |
|
669 |
+ |
calfill(x, y) /* fill with calculated pixel */ |
670 |
+ |
int x, y; |
671 |
+ |
{ |
672 |
+ |
FVECT orig, dir; |
673 |
+ |
float outbuf[6]; |
674 |
+ |
|
675 |
+ |
if (queuesiz >= PACKSIZ) { /* flush queue */ |
676 |
+ |
fflush(psend); |
677 |
+ |
clearqueue(); |
678 |
+ |
} |
679 |
+ |
/* send new ray */ |
680 |
+ |
rayview(orig, dir, &ourview, x+.5, y+.5); |
681 |
+ |
outbuf[0] = orig[0]; outbuf[1] = orig[1]; outbuf[2] = orig[2]; |
682 |
+ |
outbuf[3] = dir[0]; outbuf[4] = dir[1]; outbuf[5] = dir[2]; |
683 |
+ |
fwrite(outbuf, sizeof(float), 6, psend); |
684 |
+ |
/* remember it */ |
685 |
+ |
queue[queuesiz][0] = x; |
686 |
+ |
queue[queuesiz][1] = y; |
687 |
+ |
queuesiz++; |
688 |
+ |
} |
689 |
+ |
|
690 |
+ |
|
691 |
+ |
clearqueue() /* get results from queue */ |
692 |
+ |
{ |
693 |
+ |
float inbuf[4]; |
694 |
+ |
register int i; |
695 |
+ |
|
696 |
+ |
for (i = 0; i < queuesiz; i++) { |
697 |
+ |
fread(inbuf, sizeof(float), 4, precv); |
698 |
+ |
setcolr(pscan(queue[i][1])[queue[i][0]], |
699 |
+ |
inbuf[0], inbuf[1], inbuf[2]); |
700 |
+ |
zscan(queue[i][1])[queue[i][0]] = inbuf[3]; |
701 |
+ |
} |
702 |
+ |
queuesiz = 0; |
703 |
|
} |