#include <graphics.h>
#include <math.h>
#include <conio.h>
#define PI 3.14159
#define T PI/180
#define NN 36
#define DT PI/NN
#define DIST 0.8
#define R 190
static int n=1;
void trans(t,s)
float t[3];float s[3][3];
{ s[0][0]=cos(t[1])*cos(t[2]); s[0][1]=cos(t[1])*sin(t[2]);
s[0][2]=-sin(t[1]);
s[1][0]=sin(t[0])*sin(t[1])*cos(t[2])-cos(t[0])*sin(t[2]);
s[1][1]=sin(t[0])*sin(t[1])*sin(t[2])+cos(t[0])*cos(t[2]);
s[1][2]=sin(t[0])*cos(t[1]);
s[2][0]=cos(t[0])*sin(t[1])*cos(t[2])+sin(t[0])*sin(t[2]);
s[2][1]=cos(t[0])*sin(t[0])*sin(t[2])-sin(t[0])*cos(t[2]);
s[2][2]=cos(t[0])*cos(t[1]);}
void draw(m,da,db)
float m[3][3],da,db;
{ float f[3],f0 , x0,y0,x1,y1,x2,y2;
f[0]=R*sin(da)*cos(db); f[1]=R*sin(da)*sin(db);
f[2]=R*cos(da);
f0=f[0]*m[0][2]+f[1]*m[1][2]+f[2]*m[2][2];
if(f0<=0) n=1;
else
{ x0=300.0;y0=165.0;
x2=(m[0][0]*f[0]+m[1][0]*f[1]+m[2][0]*f[2])+x0;
y2=(m[0][1]*f[0]+m[1][1]*f[1]+m[2][1]*f[2])*DIST+y0;
if(n==1) {n=2;x1=x2;y1=y2;}
else {line(x1,y1,x2,y2); x1=x2;y1=y2;}
}}
main()
{float d[3],r[3][3];
float ta,tb;
int gdriver=VGA,gmode=VGAMED,i;
initgraph(&gdriver,&gmode,"c://tc");
cleardevice(); setbkcolor(BLACK);setcolor(GREEN);
d[1]=30*T;d[2]=-0.3;d[2]+=30*T;d[0]=60*T;
trans(d,r);
for(tb=0.0;tb<PI;tb+=DT)
{ n=1;
for(ta=0.0;ta<2.1*PI;ta+=DT) draw(r,ta,tb);}
for(ta=0.0;ta<PI;ta+=DT)
{ n=1;
for(tb=0.0;tb<2.1*PI;tb+=DT) draw(r,ta,tb);}
getch(); closegraph(); }在TC2.0上調(diào)試沒(méi)有問(wèn)題。過(guò)后會(huì)給大家傳一個(gè)能旋轉(zhuǎn)的橢球。
