Joystick input in Java
- by typoknig
Hi all, I am making a 2D game in Java and I want to use a joystick to control the movement of some crosshairs. Right now I have it so the mouse can control those crosshairs. My only criteria for this is that the control for the crosshair must stay in the game window unless a user clicks off into another window. Basically I want my game to capture whatever device is controlling the crosshairs much like a virtual machine captures a mouse. The joystick I am using (Thrustmaster Hotas Cougar) comes with some pretty advanced features, so that may make this easier (or harder). I have tried the solution listed on this page, but I am using a 64bit computer and for some reason it does not like that. I have also tried to use the key emulation feature of my joystick, but with little success. Here is what I have so far, any pointer would be appreciated.
Main Class:
import java.awt.Color;
import java.awt.Cursor;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferStrategy;
import java.awt.image.MemoryImageSource;
import java.awt.Point;
import java.awt.Toolkit;
import javax.swing.JFrame;
public class Game extends JFrame implements MouseMotionListener{
private int windowWidth = 1280;
private int windowHeight = 1024;
private Crosshair crosshair;
public static void main(String[] args) {
new Game();
}
public Game() {
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(windowWidth, windowHeight);
this.setResizable(false);
this.setLocation(0,0);
this.setVisible(true);
this.createBufferStrategy(2);
addMouseMotionListener(this);
initGame();
while(true) {
long start = System.currentTimeMillis();
gameLoop();
while(System.currentTimeMillis()-start < 5) {
//empty while loop
}
}
}
private void initGame() {
hideCursor();
crosshair = new Crosshair (windowWidth/2, windowHeight/2);
}
private void gameLoop() {
//game logic
drawFrame();
}
private void drawFrame() {
BufferStrategy bf = this.getBufferStrategy();
Graphics g = (Graphics)bf.getDrawGraphics();
try {
g = bf.getDrawGraphics();
Color darkBlue = new Color(0x010040);
g.setColor(darkBlue);
g.fillRect(0, 0, windowWidth, windowHeight);
drawCrossHair(g);
} finally {
g.dispose();
}
bf.show();
Toolkit.getDefaultToolkit().sync();
}
private void drawCrossHair(Graphics g){
Color yellow = new Color (0xEDFF62);
g.setColor(yellow);
g.drawOval(crosshair.x, crosshair.y, 40, 40);
g.fillArc(crosshair.x + 10, crosshair.y + 21 , 20, 20, -45, -90);
g.fillArc(crosshair.x - 1, crosshair.y + 10, 20, 20, -135, -90);
g.fillArc(crosshair.x + 10, crosshair.y - 1, 20, 20, -225, -90);
g.fillArc(crosshair.x + 21, crosshair.y + 10, 20, 20, -315, -90);
}
@Override
public void mouseDragged(MouseEvent e) {
//empty method
}
@Override
public void mouseMoved(MouseEvent e) {
crosshair.x = e.getX();
crosshair.y = e.getY();
}
private void hideCursor() {
int[] pixels = new int[16 * 16];
Image image = Toolkit.getDefaultToolkit().createImage(new MemoryImageSource(16, 16, pixels, 0, 16));
Cursor transparentCursor = Toolkit.getDefaultToolkit().createCustomCursor(image, new Point(0, 0), "invisiblecursor");
getContentPane().setCursor(transparentCursor);
}
}
Another Class:
public class Crosshair{
public int x;
public int y;
public Crosshair(int x, int y) {
this.x = x;
this.y = y;
}
}
