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Thread: Lunar Lander

  1. #1
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    Default Lunar Lander

    Hello. im making a lunar lander program but im having trouble with the arrow keys and the accelaration. right now the code is in its first form and i just want to get the ball to function like the lunar lander game. could someone fix the key functions, make the object functional like the lunar lander program or atleast give me some tips. any help would be appreciated

    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){}
    }
    Last edited by sqwundle; October 24th, 2012 at 05:38 PM. Reason: file

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  3. #2
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    Default Re: Lunar Lander

    That isn't really how this works. We can't just do things for you, especially with the out-of-context code you've posted here (which should be posted using the highlight tags to preserve formatting). You haven't actually told us what's wrong exactly, so it's going to be pretty hard for anybody to fix anything for you. It's better to ask a specific technical question and post an SSCCE that demonstrates exactly what you're talking about.
    Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
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