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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* Copyright (c) 1989 Regents of the University of California */ |
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/* |
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* genworm.c - program to generate worms (strings with varying thickness). |
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* |
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* 9/24/87 |
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*/ |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <math.h> |
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#include <string.h> |
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#include "calcomp.h" |
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#include "resolu.h" |
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#include "rterror.h" |
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#include "fvect.h" |
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#define XNAME "X`SYS`" /* x function name */ |
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#define max(a,b) ((a) > (b) ? (a) : (b)) |
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double funvalue(), l_hermite(), l_bezier(), l_bspline(), argument(); |
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/* XXX redundant, move to library */ |
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double l_hermite(char *), l_bezier(char *), l_bspline(char *); |
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int |
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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 long eclock; |
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char stmp[256]; |
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double t, f, lastr, r; |
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double t, f, lastr = 0, r; |
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FVECT lastp, p; |
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int i, nseg; |
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esupport |= E_VARIABLE|E_FUNCTION|E_RCONST; |
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esupport &= ~(E_OUTCHAN|E_INCHAN); |
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varset("PI", ':', PI); |
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funset("hermite", 5, ':', l_hermite); |
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funset("bezier", 5, ':', l_bezier); |
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if (nseg <= 0) |
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goto userror; |
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printhead(argc, argv); |
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fputs("# ", stdout); |
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printargs(argc, argv, stdout); |
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eclock = 0; |
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for (i = 0; i <= nseg; i++) { |
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p[1] = funvalue(YNAME, 1, &t); |
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p[2] = funvalue(ZNAME, 1, &t); |
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r = funvalue(RNAME, 1, &t); |
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if (i) |
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if (i) { |
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if (lastr <= r+FTINY && lastr >= r-FTINY) { |
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printf("\n%s cylinder %s.c%d\n", |
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argv[1], argv[2], i); |
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f = f <= 0.0 ? 0.0 : sqrt(f); |
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printf("%18.12g %18.12g\n", f*lastr, f*r); |
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} |
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} |
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printf("\n%s sphere %s.s%d\n", argv[1], argv[2], i); |
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printf("0\n0\n4 %18.12g %18.12g %18.12g %18.12g\n", |
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p[0], p[1], p[2], r); |
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VCOPY(lastp, p); |
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lastr = r; |
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} |
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quit(0); |
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return 0; |
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userror: |
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fprintf(stderr, |
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"Usage: %s material name x(t) y(t) z(t) r(t) nseg [-e expr] [-f file]\n", |
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argv[0]); |
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quit(1); |
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return 1; |
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} |
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eputs(msg) |
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char *msg; |
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{ |
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fputs(msg, stderr); |
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} |
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wputs(msg) |
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char *msg; |
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{ |
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eputs(msg); |
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} |
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quit(code) |
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{ |
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exit(code); |
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} |
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printhead(ac, av) /* print command header */ |
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register int ac; |
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register 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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double |
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l_hermite() |
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l_hermite(char *nm) |
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{ |
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double t; |
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double |
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l_bezier() |
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l_bezier(char *nm) |
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{ |
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double t; |
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double |
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l_bspline() |
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l_bspline(char *nm) |
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{ |
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double t; |
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