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greg |
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/* Copyright (c) 1990 Regents of the University of California */
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#ifndef lint
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static char SCCSid[] = "$SunId$ LBL";
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#endif
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/* Copyright (c) 1988 Regents of the University of California */
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/*
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* thf2rad - convert GDS things file to Radiance scene description.
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*
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* 12/21/88
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*/
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#include <stdio.h>
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#define MAXSTR 128 /* maximum string or id length */
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#define MAXPTS 2048 /* maximum points per object */
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typedef struct {
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double x, y, z;
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} POINT;
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double rad = 0.0; /* line radius */
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main(argc, argv)
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int argc;
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char *argv[];
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{
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extern double atof();
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char *name = NULL;
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int an;
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for (an = 1; an < argc; an++)
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if (argv[an][0] == '-')
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switch (argv[an][1]) {
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case 'n':
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name = argv[++an];
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break;
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case 'r':
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rad = atof(argv[++an]);
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break;
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default:
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fprintf(stderr,
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"Usage: %s [-n name][-r rad] [file ..]\n",
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argv[0]);
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exit(1);
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}
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else
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break;
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header(argc, argv);
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if (an < argc)
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for ( ; an < argc; an++)
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thf2rad(name, argv[an]);
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else
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thf2rad(name, NULL);
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exit(0);
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}
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thf2rad(name, file) /* convert things file */
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char *name, *file;
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{
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char nambuf[MAXSTR];
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register char *cp;
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FILE *fp;
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int on;
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/* open file and hack name */
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if (file == NULL) {
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fp = stdin;
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file = "<stdin>";
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if (name == NULL)
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name = "thing";
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} else {
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if ((fp = fopen(file, "r")) == NULL) {
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fprintf(stderr, "%s: cannot open\n", file);
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exit(1);
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}
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if (name == NULL)
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name = file;
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}
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for (cp = nambuf; *cp = *name++; cp++)
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;
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/* get objects from file */
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on = 0;
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while (cvobject(nambuf, file, fp))
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sprintf(cp, ".%d", ++on);
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}
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cvobject(name, file, fp) /* convert next object in things file */
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char *name, *file;
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FILE *fp;
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{
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static POINT parr[MAXPTS];
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static unsigned char haspt[MAXPTS/8];
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char sbuf[MAXSTR], nambuf[MAXSTR];
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int npts, n, nv, p1, p2;
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register int i;
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/* get points */
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if (fscanf(fp, "%s", sbuf) != 1)
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return(0);
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if (strcmp(sbuf, "YIN"))
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readerr(file, "not a GDS things file");
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if (fscanf(fp, "%d", &npts) != 1 || npts < 0 || npts > MAXPTS)
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readerr(file, "bad number of points");
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for (i = 0; i < npts; i++)
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if (fscanf(fp, "%lf %lf %lf",
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&parr[i].x, &parr[i].y, &parr[i].z) != 3)
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readerr(file, "bad point");
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for (i = (npts+7)/8; i >= 0; i--)
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haspt[i] = 0;
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/* get lines */
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if (fscanf(fp, "%d", &n) != 1 || n < 0)
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readerr(file, "bad number of lines");
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for (i = 0; i < n; i++) {
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if (fscanf(fp, "%d %d %s", &p1, &p2, sbuf) != 3)
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readerr(file, "error reading vector");
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if (--p1 < 0 || p1 >= npts || --p2 < 0 || p2 >= npts)
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readerr(file, "bad point in vector");
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if (!(haspt[p1>>3] & 1<<(p1&7))) {
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sprintf(nambuf, "%s.l%d.s0", name, i+1);
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point(sbuf, nambuf, &parr[p1]);
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haspt[p1>>3] |= 1<<(p1&7);
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}
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sprintf(nambuf, "%s.l%d.c", name, i+1);
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line(sbuf, nambuf, &parr[p1], &parr[p2]);
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if (!(haspt[p2>>3] & 1<<(p2&7))) {
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sprintf(nambuf, "%s.l%d.s1", name, i+1);
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point(sbuf, nambuf, &parr[p2]);
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haspt[p2>>3] |= 1<<(p2&7);
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}
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}
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/* get surfaces */
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if (fscanf(fp, "%d", &n) != 1 || n < 0)
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readerr(file, "bad number of surfaces");
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for (i = 0; i < n; i++) {
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if (fscanf(fp, "%d %s %d", &p1, sbuf, &nv) != 3)
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readerr(file, "error reading surface");
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if (p1 != 1 || nv < 0)
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readerr(file, "bad surface type (has hole?)");
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if (nv < 3) {
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while (nv--)
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fscanf(fp, "%*d");
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continue;
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}
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printf("\n%s polygon %s.p%d\n", sbuf, name, i+1);
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printf("0\n0\n%d\n", 3*nv);
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while (nv--) {
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if (fscanf(fp, "%d", &p1) != 1)
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readerr(file, "error reading surface vertex");
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loc(&parr[p1-1]);
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}
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}
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return(1);
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}
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header(ac, av) /* print header */
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int ac;
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char **av;
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{
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putchar('#');
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while (ac--) {
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putchar(' ');
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fputs(*av++, stdout);
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}
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putchar('\n');
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}
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point(mat, nam, pos) /* print point */
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char *mat, *nam;
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POINT *pos;
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{
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if (rad <= 0.0)
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return;
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printf("\n%s sphere %s\n", mat, nam);
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printf("0\n0\n4\n");
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loc(pos);
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printf("\t%g\n", rad);
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}
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line(mat, nam, p1, p2) /* print line */
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char *mat, *nam;
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POINT *p1, *p2;
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{
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if (rad <= 0.0)
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return;
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printf("\n%s cylinder %s\n", mat, nam);
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printf("0\n0\n7\n");
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loc(p1);
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loc(p2);
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printf("\t%g\n", rad);
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}
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loc(p) /* print location */
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register POINT *p;
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{
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printf("\t%14.8g\t%14.8g\t%14.8g\n", p->x, p->y, p->z);
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}
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readerr(file, err) /* print read error and exit */
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char *file, *err;
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{
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fprintf(stderr, "%s: %s\n", file, err);
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exit(1);
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}
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