Alright guys i’m trying to make an Asteroids type game and I need to be able to rotate an image around so that the front of the ship follows my mouse. I have looked for a few hours now and have found a couple of things but none that satisfy my needs.
If anyone knows how to do this please share!
thanks in advance
here is the code i have now
package Asteroids;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
@SuppressWarnings("serial")
public class Asteroids extends JFrame implements Runnable, MouseListener,
MouseMotionListener, KeyListener {
private Image dbImage;
private Graphics dbg;
int x, y, mx, my;
int a, b, c, degree;
double scale = 1.0;
ImageIcon shipIcon = new ImageIcon(this.getClass().getClassLoader()
.getResource("AstroidsShip.png"));
Image ship = shipIcon.getImage();
public static void main(String[] args) {
Asteroids frame = new Asteroids();
Thread thread = new Thread(frame);
thread.start();
}
public Asteroids() {
addMouseListener(this);
addMouseMotionListener(this);
addKeyListener(this);
setTitle("Astroids");
setSize(500, 500);
setBackground(Color.WHITE);
setResizable(false);
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
x = getWidth() / 2 - 10;
y = getHeight() - getHeight() / 2;
}
public void run() {
while (true) {
try {
} catch (Exception e) {
}
}
}
public void paint(Graphics g) {
dbImage = createImage(getWidth(), getHeight());
dbg = dbImage.getGraphics();
paintComponent(dbg);
g.drawImage(dbImage, 0, 0, this);
}
public void paintComponent(Graphics g) {
g.drawString("POS: " + mx + ", " + my, 10, 40);
System.out.println(getAngle());
g.drawImage(ship, x, y, this);
g.drawLine(x + 12, y + 10, mx, my);
repaint();
}
public int getAngle() {
a = mx - (x + 12);
b = (y - 10) - my;
return degree = (int) Math.toDegrees(Math.atan2(b, a));
}
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyPressed(KeyEvent e) {
}
@Override
public void keyReleased(KeyEvent e) {
}
@Override
public void mouseDragged(MouseEvent e) {
}
@Override
public void mouseMoved(MouseEvent e) {
mx = e.getX();
my = e.getY();
}
@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mousePressed(MouseEvent e) {
}
@Override
public void mouseReleased(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
}
You can use Java2D. It allows to rotate the image and do a lot lot of other cool operations on the image. It also have got hardware acceleration support (through DirectX or OpenGL).
Java2D is built-in in JRE.