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#ifndef lint |
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static const char RCSid[] = "$Id: thf2rad.c,v 2.7 2003/07/27 22:12:02 schorsch Exp $"; |
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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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/* |
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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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|
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <math.h> |
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|
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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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|
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typedef struct { |
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double x, y, z; |
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} POINT; |
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|
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double rad = 0.0; /* line radius */ |
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|
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static void thf2rad(char *name, char *file); |
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static int cvobject(char *name, char *file, FILE *fp); |
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static void header(int ac, char **av); |
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static void point(char *mat, char *nam, POINT *pos); |
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static void line(char *mat, char *nam, POINT *p1, POINT *p2); |
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static void loc(POINT *p); |
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static void readerr(char *file, char *err); |
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|
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|
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int |
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main( |
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int argc, |
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char *argv[] |
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) |
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{ |
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char *name = NULL; |
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int an; |
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|
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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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|
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|
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void |
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thf2rad( /* convert things file */ |
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char *name, |
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char *file |
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) |
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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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|
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|
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int |
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cvobject( /* convert next object in things file */ |
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char *name, |
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char *file, |
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FILE *fp |
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) |
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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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|
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|
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void |
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header( /* print header */ |
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int ac, |
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char **av |
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) |
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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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|
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|
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void |
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point( /* print point */ |
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char *mat, |
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char *nam, |
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POINT *pos |
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) |
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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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|
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|
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void |
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line( /* print line */ |
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char *mat, |
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char *nam, |
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POINT *p1, |
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POINT *p2 |
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) |
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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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|
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|
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void |
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loc( /* print location */ |
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register POINT *p |
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) |
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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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|
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|
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void |
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readerr( /* print read error and exit */ |
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char *file, |
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char *err |
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) |
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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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} |
