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greg |
1.1 |
#ifndef lint
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schorsch |
2.7 |
static const char RCSid[] = "$Id: genmarble.c,v 2.6 2003/06/08 12:03:09 schorsch Exp $";
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greg |
1.1 |
#endif
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/*
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* genmarble.c - generate a marble with bubbles inside.
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*
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* 1/8/86
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*/
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#include <stdio.h>
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greg |
2.5 |
#include <stdlib.h>
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greg |
2.3 |
#include <math.h>
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greg |
1.1 |
#include "random.h"
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#define PI 3.14159265359
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typedef double FVECT[3];
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schorsch |
2.6 |
static double bubble(); /* pretty cute, huh? */
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static void sphere_cart();
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greg |
2.4 |
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schorsch |
2.7 |
int
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greg |
1.1 |
main(argc, argv)
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int argc;
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char **argv;
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{
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char *cmtype, *cname;
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FVECT cent;
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double rad;
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int nbubbles, i;
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double bubrad;
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FVECT v;
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double brad;
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if (argc != 9) {
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fprintf(stderr,
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"Usage: %s material name cent rad #bubbles bubrad\n",
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argv[0]);
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exit(1);
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}
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cmtype = argv[1];
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cname = argv[2];
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cent[0] = atof(argv[3]);
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cent[1] = atof(argv[4]);
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cent[2] = atof(argv[5]);
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rad = atof(argv[6]);
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nbubbles = atoi(argv[7]);
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bubrad = atof(argv[8]);
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if (bubrad >= rad) {
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fprintf(stderr, "%s: bubbles too big for marble\n", argv[0]);
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exit(1);
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}
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printf("\n%s sphere %s\n", cmtype, cname);
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printf("0\n0\n4 %f %f %f %f\n", cent[0], cent[1], cent[2], rad);
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for (i = 0; i < nbubbles; i++) {
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brad = bubble(v, cent, rad, bubrad);
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printf("\n%s bubble %s.%d\n", cmtype, cname, i);
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printf("0\n0\n4 %f %f %f %f\n", v[0], v[1], v[2], brad);
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}
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return(0);
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}
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schorsch |
2.6 |
static double
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greg |
1.1 |
bubble(v, cent, rad, bubrad) /* compute location of random bubble */
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FVECT v, cent;
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double rad, bubrad;
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{
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double r, ro, theta, phi;
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r = frandom()*bubrad;
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ro = sqrt(frandom())*(rad-r);
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theta = frandom()*(2.0*PI);
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phi = frandom()*PI;
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sphere_cart(v, ro, theta, phi);
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v[0] += cent[0]; v[1] += cent[1]; v[2] += cent[2];
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return(r);
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}
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schorsch |
2.6 |
static void
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greg |
1.1 |
sphere_cart(v, ro, theta, phi) /* spherical to cartesian coord. conversion */
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FVECT v;
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double ro, theta, phi;
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{
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double d;
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d = sin(phi);
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v[0] = ro*d*cos(theta);
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v[1] = ro*d*sin(theta);
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v[2] = ro*cos(phi);
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}
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