Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.help > #2170

Lunar Lander

Show all headers | View raw

hello im making a lunar lander program but im having trouble with the accleration and when you click the left and right arrows the ball goes flying can anyone help fix my code 

import java.awt.*;
import java.awt.event.*;

public class lunarlander extends java.applet.Applet implements MouseListener, KeyListener
{
		double x = 100, y = 40;
		double vx = 0.1, vy = 0.1;


		public lunarlander()
		{
			addMouseListener(this);
			addKeyListener(this);
		}
		public void paint(Graphics g)
		{
			vy = vy + 0.1;
			vx = vx + 0.001;
			vy = vy * 0.999;
			vx = vx * 0.999;
			if(y > 600 && vy > 0)
				vy = - vy;
			x = x + vx;
			y = y + vy;
			g.fillOval((int)x,(int)y,30,30);
			for(int i = 0; i < 100000; i ++)
			repaint();
			if(y < 100)
			g.drawString("Crash", 800, 800);
		}
		public void keyReleased(KeyEvent ke){}
		public void keyPressed(KeyEvent ke)
		{
			if(ke.getKeyCode() == KeyEvent.VK_UP)
				vy-=vy+2.0;
			else if(ke.getKeyCode() == KeyEvent.VK_DOWN)
				vy-=vy-4.0;
			else if(ke.getKeyCode() == KeyEvent.VK_LEFT)
				vx+=x-0.01;
			else if(ke.getKeyCode() == KeyEvent.VK_RIGHT)
				vx+=x-0.01;
		}
		public void keyTyped(KeyEvent ke){}
		public void mouseExited(MouseEvent me){}
		public void mouseEntered(MouseEvent me){}
		public void mouseClicked(MouseEvent me){}
		public void mouseReleased(MouseEvent me){}
		public void mousePressed(MouseEvent me){}
}

Back to comp.lang.java.help | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Lunar Lander sqwundle@gmail.com - 2012-10-24 15:11 -0700
  Re: Lunar Lander Knute Johnson <nospam@knutejohnson.com> - 2012-10-24 17:57 -0700
    Re: Lunar Lander sqwundle@gmail.com - 2012-10-24 18:32 -0700
      Re: Lunar Lander Knute Johnson <nospam@knutejohnson.com> - 2012-10-24 21:11 -0700
      Re: Lunar Lander Lew <lewbloch@gmail.com> - 2012-10-25 01:05 -0700
  Re: Lunar Lander Lew <lewbloch@gmail.com> - 2012-10-24 18:31 -0700
  Re: Lunar Lander Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-10-24 20:37 -0700

csiph-web