steering by the keys

[mannUndMeer]

Hi Freaks,

I'm trying to build a little shoot-game just for fun. But I have problems to handle the keyEvents well.

My SpaceShip should fly to the direction as long as the key (for example: VK_UP && VK_RIGHT --> fly to north-east) is been pressed. by this way a lot of events are thrown and I don't know the right way to catch them (performantly).

Could you please post an example? To see, what I mean, please visit my applet:

http://www.gm.fh-koeln.de/~wi784/to/java/flight/flightJar.htm

The steering doesn't work valid - that's my problem.

greetings & thanks

Tobias

[cknoll]

Hi,
 The pattern I have seen used in games for capturing these sort of events is to just listen for the keypressed and keyreleased events and just set a boolean var to indicate which directional keys have been pressed.  In your movement loop, you don't wait for events, rather you just check the direction variables and process accordingly.   If a key is held down, I _think_ keytyped events are fired, but you don't want to handle those, you just want to handle keypressed and keyrelseased events.

-Chris

[lefty]

Like this:

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import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; public class Game extends KeyAdapter {       private boolean up;       private boolean down;       private boolean left;       private boolean right;       private void mainLoop()       {             while (true)             {                   // check status of up, down, left, right            }       }       public void keyPressed(KeyEvent e)       {             int code = e.getKeyCode();             if (code = KeyEvent.VK_UP)             {                   up = true;             }             else if (code. = KeyEvent.VK_DOWN)             {                   down = true;             }             else if (code = KeyEvent.VK_LEFT)             {                   left = true;             }             else if (code = KeyEvent.VK_RIGHT)             {                   right = true;             }       }       public void keyReleased(KeyEvent e)       {             int code = e.getKeyCode();             if (code = (KeyEvent.VK_UP))             {                   up = false;             }             else if (code = KeyEvent.VK_DOWN)             {                   down = false;             }             else if (code = KeyEvent.VK_LEFT)             {                   left = false;             }             else if (code = KeyEvent.VK_RIGHT)             {                   right = false;             }       } }

Games published by our own members! Check 'em out!

[lefty]

Doh!.... except the if (code = KeyEvent.VK_XX) should be if (code == KeyEvent.VK_UP).