| 1 |
/* Copyright (c) 1986 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* genmarble.c - generate a marble with bubbles inside. |
| 9 |
* |
| 10 |
* 1/8/86 |
| 11 |
*/ |
| 12 |
|
| 13 |
#include <stdio.h> |
| 14 |
|
| 15 |
#include "random.h" |
| 16 |
|
| 17 |
#ifndef atof |
| 18 |
extern double atof(); |
| 19 |
#endif |
| 20 |
|
| 21 |
#define PI 3.14159265359 |
| 22 |
|
| 23 |
typedef double FVECT[3]; |
| 24 |
|
| 25 |
double bubble(); /* pretty cute, huh? */ |
| 26 |
|
| 27 |
|
| 28 |
main(argc, argv) |
| 29 |
int argc; |
| 30 |
char **argv; |
| 31 |
{ |
| 32 |
char *cmtype, *cname; |
| 33 |
FVECT cent; |
| 34 |
double rad; |
| 35 |
int nbubbles, i; |
| 36 |
double bubrad; |
| 37 |
FVECT v; |
| 38 |
double brad; |
| 39 |
|
| 40 |
if (argc != 9) { |
| 41 |
fprintf(stderr, |
| 42 |
"Usage: %s material name cent rad #bubbles bubrad\n", |
| 43 |
argv[0]); |
| 44 |
exit(1); |
| 45 |
} |
| 46 |
cmtype = argv[1]; |
| 47 |
cname = argv[2]; |
| 48 |
cent[0] = atof(argv[3]); |
| 49 |
cent[1] = atof(argv[4]); |
| 50 |
cent[2] = atof(argv[5]); |
| 51 |
rad = atof(argv[6]); |
| 52 |
nbubbles = atoi(argv[7]); |
| 53 |
bubrad = atof(argv[8]); |
| 54 |
|
| 55 |
if (bubrad >= rad) { |
| 56 |
fprintf(stderr, "%s: bubbles too big for marble\n", argv[0]); |
| 57 |
exit(1); |
| 58 |
} |
| 59 |
|
| 60 |
printf("\n%s sphere %s\n", cmtype, cname); |
| 61 |
printf("0\n0\n4 %f %f %f %f\n", cent[0], cent[1], cent[2], rad); |
| 62 |
|
| 63 |
for (i = 0; i < nbubbles; i++) { |
| 64 |
brad = bubble(v, cent, rad, bubrad); |
| 65 |
printf("\n%s bubble %s.%d\n", cmtype, cname, i); |
| 66 |
printf("0\n0\n4 %f %f %f %f\n", v[0], v[1], v[2], brad); |
| 67 |
} |
| 68 |
|
| 69 |
return(0); |
| 70 |
} |
| 71 |
|
| 72 |
|
| 73 |
double |
| 74 |
bubble(v, cent, rad, bubrad) /* compute location of random bubble */ |
| 75 |
FVECT v, cent; |
| 76 |
double rad, bubrad; |
| 77 |
{ |
| 78 |
double sqrt(); |
| 79 |
double r, ro, theta, phi; |
| 80 |
|
| 81 |
r = frandom()*bubrad; |
| 82 |
ro = sqrt(frandom())*(rad-r); |
| 83 |
theta = frandom()*(2.0*PI); |
| 84 |
phi = frandom()*PI; |
| 85 |
sphere_cart(v, ro, theta, phi); |
| 86 |
v[0] += cent[0]; v[1] += cent[1]; v[2] += cent[2]; |
| 87 |
return(r); |
| 88 |
} |
| 89 |
|
| 90 |
|
| 91 |
sphere_cart(v, ro, theta, phi) /* spherical to cartesian coord. conversion */ |
| 92 |
FVECT v; |
| 93 |
double ro, theta, phi; |
| 94 |
{ |
| 95 |
double sin(), cos(); |
| 96 |
double d; |
| 97 |
|
| 98 |
d = sin(phi); |
| 99 |
v[0] = ro*d*cos(theta); |
| 100 |
v[1] = ro*d*sin(theta); |
| 101 |
v[2] = ro*cos(phi); |
| 102 |
} |
