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94 lines (94 loc) · 1.46 KB
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// APPLETS //
/*
Applet Size : 900 x 600
*/
import java.awt.*;
import java.applet.*;
import java.lang.Math;
public class RB29 extends Applet
{
int a , b , c , d , dia , a1 , b1 , c1 , d1;
int i , j , k , l , p;
public void init()
{
a = b = 0;
c = 600;
d = 500;
i = j = k = l = p = 1;
dia = 71;
}
public void paint(Graphics g)
{
while(p <= 15000)
{
a1 = a + dia / 2 + 1;
b1 = b + dia / 2 + 1;
c1 = c + dia / 2 + 1;
d1 = d + dia / 2 + 1;
g.setColor(Color.red);
g.fillOval(a , b , dia , dia);
g.setColor(Color.black);
g.fillOval(c , d , dia , dia);
g.setColor(Color.white);
for(int x = 1;x <= 2800;x++)
{
g.drawRect(1 , 1 , 1 , 1);
}
g.fillOval(a , b , dia , dia);
g.fillOval(c , d , dia , dia);
if( a > 900 - dia - 1)
{
i = -1;
}
if(a < 1)
{
i = 1;
}
if(b > 600 - dia - 1)
{
j = -1;
}
if(b < 1)
{
j = 1;
}
if(c > 900 - dia - 1)
{
k = -1;
}
if(c < 1)
{
k = 1;
}
if(d > 600 - dia - 1)
{
l = -1;
}
if(d < 1)
{
l = 1;
}
if(collision())
{
i *= -1;
j *= -1;
k *= -1;
l *= -1;
}
a += i;
b += j;
c += k;
d += l;
p++;
}
}
boolean collision()
{
int dist = (int) (Math.sqrt(((a1 - c1) * (a1 - c1)) + ((b1 - d1) * (b1 - d1))));
if(dist <= dia)
{
return (true);
}
return (false);
}
}