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THF2RAD2.C
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C/C++ Source or Header
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1993-10-07
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4KB
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193 lines
/* Copyright (c) 1988 Regents of the University of California */
/*
* thf2rad - convert GDS things file to Radiance scene description.
*
* 12/21/88
*/
#include <stdio.h>
#define MAXSTR 128 /* maximum string or id length */
#define MAXPTS 1024 /* maximum points per object */
typedef struct {
double x, y, z;
} POINT;
double rad = 0.0; /* line radius */
main(argc, argv)
int argc;
char *argv[];
{
extern double atof();
char *name = NULL;
int an;
for (an = 1; an < argc; an++)
if (argv[an][0] == '-')
switch (argv[an][1]) {
case 'n':
name = argv[++an];
break;
case 'r':
rad = atof(argv[++an]);
break;
default:
fprintf(stderr,
"Usage: %s [-n name][-r rad] [file ..]\n",
argv[0]);
exit(1);
}
else
break;
header(argc, argv);
if (an < argc)
for ( ; an < argc; an++)
thf2rad(name, argv[an]);
else
thf2rad(name, NULL);
exit(0);
}
thf2rad(name, file) /* convert things file */
char *name, *file;
{
char nambuf[MAXSTR];
register char *cp;
FILE *fp;
int on;
/* open file and hack name */
if (file == NULL) {
fp = stdin;
file = "<stdin>";
if (name == NULL)
name = "thing";
} else {
if ((fp = fopen(file, "r")) == NULL) {
fprintf(stderr, "%s: cannot open\n", file);
exit(1);
}
if (name == NULL)
name = file;
}
for (cp = nambuf; *cp = *name++; cp++)
;
/* get objects from file */
on = 0;
while (cvobject(nambuf, file, fp))
sprintf(cp, ".%d", ++on);
}
cvobject(name, file, fp) /* convert next object in things file */
char *name, *file;
FILE *fp;
{
static POINT parr[MAXPTS];
char sbuf[MAXSTR], nambuf[MAXSTR];
int npts, n, nv, p1, p2;
register int i;
/* get points */
if (fscanf(fp, "%s", sbuf) != 1)
return(0);
if (strcmp(sbuf, "YIN"))
readerr(file, "not a GDS things file");
if (fscanf(fp, "%d", &npts) != 1 || npts < 0 || npts > MAXPTS)
readerr(file, "bad number of points");
for (i = 0; i < npts; i++)
if (fscanf(fp, "%lf %lf %lf",
&parr[i].x, &parr[i].y, &parr[i].z) != 3)
readerr(file, "bad point");
/* get lines */
if (fscanf(fp, "%d", &n) != 1 || n < 0)
readerr(file, "bad number of lines");
for (i = 0; i < n; i++) {
if (fscanf(fp, "%d %d %s", &p1, &p2, sbuf) != 3)
readerr(file, "error reading vector");
if (--p1 < 0 || p1 >= npts || --p2 < 0 || p2 >= npts)
readerr(file, "bad point in vector");
sprintf(nambuf, "%s.l%d.c", name, i+1);
line(sbuf, nambuf, &parr[p1], &parr[p2]);
}
/* get surfaces */
if (fscanf(fp, "%d", &n) != 1 || n < 0)
readerr(file, "bad number of surfaces");
for (i = 0; i < n; i++) {
if (fscanf(fp, "%d %s %d", &p1, sbuf, &nv) != 3)
readerr(file, "error reading surface");
if (p1 != 1 || nv < 0)
readerr(file, "bad surface type (has hole?)");
if (nv < 3) {
while (nv--)
fscanf(fp, "%*d");
continue;
}
printf("\n%s polygon %s.p%d\n", sbuf, name, i+1);
printf("0\n0\n%d\n", 3*nv);
while (nv--) {
if (fscanf(fp, "%d", &p1) != 1)
readerr(file, "error reading surface vertex");
loc(&parr[p1-1]);
}
}
return(1);
}
header(ac, av) /* print header */
int ac;
char **av;
{
putchar('#');
while (ac--) {
putchar(' ');
fputs(*av++, stdout);
}
putchar('\n');
}
line(mat, nam, p1, p2) /* print line */
char *mat, *nam;
POINT *p1, *p2;
{
if (rad <= 0.0)
return;
printf("\n%s ring %s.r0\n", mat, nam);
printf("0\n0\n8\n");
loc(p1);
printf("\t%14.8g\t%14.8g\t%14.8g\n",
p1->x-p2->x, p1->y-p2->y, p1->z-p2->z);
printf("\t0\t%14.8g\n", rad);
printf("\n%s cylinder %s\n", mat, nam);
printf("0\n0\n7\n");
loc(p1);
loc(p2);
printf("\t%g\n", rad);
printf("\n%s ring %s.r1\n", mat, nam);
printf("0\n0\n8\n");
loc(p2);
printf("\t%14.8g\t%14.8g\t%14.8g\n",
p2->x-p1->x, p2->y-p1->y, p2->z-p1->z);
printf("\t0\t%14.8g\n", rad);
}
loc(p) /* print location */
register POINT *p;
{
printf("\t%14.8g\t%14.8g\t%14.8g\n", p->x, p->y, p->z);
}
readerr(file, err) /* print read error and exit */
char *file, *err;
{
fprintf(stderr, "%s: %s\n", file, err);
exit(1);
}