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  [SOLVED] Fast and slow KeyAdapter(KeyInputHandler)  (Read 2394 times)
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Offline zetsin

Senior Newbie





« Posted 2012-11-03 17:14:21 »

Hello everybody! I wanna make little 2D quest-game, i added a Hero and KeyAdapter... But!
On my Linux-notebook Hero walking not slow and not fast(like in all games).
On my Windows-PC Hero walking very fast. 1 keyPress on PC = 10 keyPress on notebook. How can i fix it? Thanks for help.

Code of KeyInputHandler:
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package code;

import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

public class KeyInputHandler extends KeyAdapter {

    private byte direction = 0;
    private boolean jumped = false;
    /*
     * 0 - no
     * 1 - right
     * 2 - left
     */


    @Override
    public void keyPressed(KeyEvent e) {
        if (e.getKeyCode() == KeyEvent.VK_LEFT) {
            direction = 2;
        }
        if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
            direction = 1;
        }
        if (e.getKeyCode() == KeyEvent.VK_UP) {
            jumped = true;
        }
    }

    @Override
    public void keyReleased(KeyEvent e) {
        if (e.getKeyCode() == KeyEvent.VK_LEFT) {
            direction = 0;
        }
        if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
            direction = 0;
        }
        if (e.getKeyCode() == KeyEvent.VK_UP) {
            jumped = false;
        }
    }
   
    public byte getDirection(){
        return direction;
    }
   
    public boolean getJumped(){
        return jumped;
    }
}


Part of code in Main class:
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@Override
    public void run() {
        long lastTime = System.currentTimeMillis();
        long delta;
        try {
            init();
        } catch (IOException ex) {
            Logger.getLogger(Game.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        while (running) {
            delta = System.currentTimeMillis() - lastTime;
            lastTime = System.currentTimeMillis();
            update(delta);
            render();
        }
    }
   
    private void update(long delta) {
        if (KIH.getDirection() == 2) {
            level.walkBackward();
        }
        if (KIH.getDirection() == 1) {
            level.walkForward();
        }
        if (KIH.getJumped()){
            level.heroAction();
        }
    }
Offline Agro
« Reply #1 - Posted 2012-11-03 18:44:19 »

Well, you're not implementing any constant frame rate method. You're almost there, but you're not telling the game to sleep any X amount of time.

Here's some code I use:

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@Override
   public void run() {
      long beforeTime, timeDiff, sleep;

        beforeTime = System.currentTimeMillis();
     
        while(true) {
           update();
           repaint();
           
           timeDiff = System.currentTimeMillis() - beforeTime;
            sleep = FRAME_DELAY - timeDiff;
            if (sleep < 0)
                sleep = 2;
            try {
                Thread.sleep(sleep);
            } catch (InterruptedException e) {
               
            }

            beforeTime = System.currentTimeMillis();
        }
   }


It keeps a fairly constant frame rate for me.

Offline zetsin

Senior Newbie





« Reply #2 - Posted 2012-11-03 19:40:07 »

Thanks a lot! It works! )
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