| 1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ SGI"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* Generate renderable grids from a holodeck file |
| 9 |
*/ |
| 10 |
|
| 11 |
#include "holo.h" |
| 12 |
|
| 13 |
char *progname; /* global argv[0] */ |
| 14 |
|
| 15 |
char *mat, *name; /* material and object id */ |
| 16 |
double rad; /* grid line radius */ |
| 17 |
|
| 18 |
|
| 19 |
main(argc, argv) |
| 20 |
int argc; |
| 21 |
char *argv[]; |
| 22 |
{ |
| 23 |
int sect; |
| 24 |
|
| 25 |
progname = argv[0]; |
| 26 |
if (argc < 5 | argc > 6) |
| 27 |
goto userr; |
| 28 |
mat = argv[1]; |
| 29 |
name = argv[2]; |
| 30 |
rad = atof(argv[3]); |
| 31 |
sect = argc==5 ? -1 : atoi(argv[5]); |
| 32 |
fputs("# ", stdout); |
| 33 |
printargs(argc, argv, stdout); |
| 34 |
gridsect(argv[4], sect); |
| 35 |
quit(0); |
| 36 |
userr: |
| 37 |
fprintf(stderr, "Usage: %s mat name rad input.hdk [section]\n", |
| 38 |
progname); |
| 39 |
exit(1); |
| 40 |
} |
| 41 |
|
| 42 |
|
| 43 |
gridsect(fname, sect) /* get specified section(s) and print grids */ |
| 44 |
char *fname; |
| 45 |
int sect; |
| 46 |
{ |
| 47 |
extern long ftell(); |
| 48 |
FILE *fp; |
| 49 |
HOLO hdsect; |
| 50 |
int fd; |
| 51 |
int4 nextloc; |
| 52 |
int n; |
| 53 |
/* open holodeck file */ |
| 54 |
if ((fp = fopen(fname, "r")) == NULL) { |
| 55 |
sprintf(errmsg, "cannot open \"%s\"", fname); |
| 56 |
error(SYSTEM, errmsg); |
| 57 |
} |
| 58 |
/* check header and magic number */ |
| 59 |
if (checkheader(fp, HOLOFMT, NULL) < 0 || getw(fp) != HOLOMAGIC) { |
| 60 |
sprintf(errmsg, "file \"%s\" not in holodeck format", fname); |
| 61 |
error(USER, errmsg); |
| 62 |
} |
| 63 |
fd = dup(fileno(fp)); /* dup file handle */ |
| 64 |
nextloc = ftell(fp); /* get stdio position */ |
| 65 |
fclose(fp); /* done with stdio */ |
| 66 |
for (n = 0; nextloc > 0L; n++) { /* get the section(s) */ |
| 67 |
lseek(fd, (long)nextloc, 0); |
| 68 |
read(fd, (char *)&nextloc, sizeof(nextloc)); |
| 69 |
if (sect < 0 | n == sect) { |
| 70 |
read(fd, (char *)&hdsect, sizeof(HDGRID)); |
| 71 |
hdcompgrid(&hdsect); |
| 72 |
putgrid(&hdsect); /* print grid */ |
| 73 |
} |
| 74 |
} |
| 75 |
} |
| 76 |
|
| 77 |
|
| 78 |
putgrid(hp) /* run through holodeck section grid lines */ |
| 79 |
register HOLO *hp; |
| 80 |
{ |
| 81 |
register int w, i; |
| 82 |
int g0, g1; |
| 83 |
FVECT wp[2], mov; |
| 84 |
double d; |
| 85 |
/* do each wall on this section */ |
| 86 |
for (w = 0; w < 6; w++) { |
| 87 |
g0 = hdwg0[w]; |
| 88 |
g1 = hdwg1[w]; |
| 89 |
d = 1.0/hp->grid[g0]; |
| 90 |
mov[0] = d * hp->xv[g0][0]; |
| 91 |
mov[1] = d * hp->xv[g0][1]; |
| 92 |
mov[2] = d * hp->xv[g0][2]; |
| 93 |
if (w & 1) { |
| 94 |
VSUM(wp[0], hp->orig, hp->xv[w>>1], 1.); |
| 95 |
VSUM(wp[0], wp[0], mov, 1.); |
| 96 |
} else |
| 97 |
VCOPY(wp[0], hp->orig); |
| 98 |
VSUM(wp[1], wp[0], hp->xv[g1], 1.); |
| 99 |
for (i = hp->grid[g0]; ; ) { /* g0 lines */ |
| 100 |
putline(wp); |
| 101 |
if (!--i) break; |
| 102 |
wp[0][0] += mov[0]; wp[0][1] += mov[1]; |
| 103 |
wp[0][2] += mov[2]; wp[1][0] += mov[0]; |
| 104 |
wp[1][1] += mov[1]; wp[1][2] += mov[2]; |
| 105 |
} |
| 106 |
d = 1.0/hp->grid[g1]; |
| 107 |
mov[0] = d * hp->xv[g1][0]; |
| 108 |
mov[1] = d * hp->xv[g1][1]; |
| 109 |
mov[2] = d * hp->xv[g1][2]; |
| 110 |
if (w & 1) |
| 111 |
VSUM(wp[0], hp->orig, hp->xv[w>>1], 1.); |
| 112 |
else |
| 113 |
VSUM(wp[0], hp->orig, mov, 1.); |
| 114 |
VSUM(wp[1], wp[0], hp->xv[g0], 1.); |
| 115 |
for (i = hp->grid[g1]; ; ) { /* g1 lines */ |
| 116 |
putline(wp); |
| 117 |
if (!--i) break; |
| 118 |
wp[0][0] += mov[0]; wp[0][1] += mov[1]; |
| 119 |
wp[0][2] += mov[2]; wp[1][0] += mov[0]; |
| 120 |
wp[1][1] += mov[1]; wp[1][2] += mov[2]; |
| 121 |
} |
| 122 |
} |
| 123 |
} |
| 124 |
|
| 125 |
|
| 126 |
putline(wp) /* put out a line */ |
| 127 |
register FVECT wp[2]; |
| 128 |
{ |
| 129 |
static int cnt = 0; |
| 130 |
|
| 131 |
printf("\n%s cylinder %s.%d\n0\n0\n7\n", mat, name, ++cnt); |
| 132 |
printf("\t%.4e %.4e %.4e\n", wp[0][0], wp[0][1], wp[0][2]); |
| 133 |
printf("\t%.4e %.4e %.4e\n", wp[1][0], wp[1][1], wp[1][2]); |
| 134 |
printf("\t%.4e\n", rad); |
| 135 |
} |
