Turret tank movement

[nav123]

I have to make a java game for my school project. I am done with the tank and it moves all over the place. The only thing i am not able to figure out is the movement of turret. The turret need to point towards the mouse and move accordingly.

Someone help ASAP. :(

[Fubarable]

Hello and welcome to the forum. Unfortunately I doubt if any one can provide you with any helpful advice until we know a lot more about your current program, your current problem, and what you've tried to do to solve the problem and how it's not working. Usually the more specific the problem and the more useful information presented in the question, the better the answer.

Please see the link in my signature below on how to ask smart questions as it will provide you with useful tips on how to give us the information we need to begin to be able to help you.

Much luck.

[ozzyman]

you'll need to read up on this:
How to Write a Mouse-Motion Listener (The Java™ Tutorials > Creating a GUI With JFC/Swing > Writing Event Listeners)

to track the mouse position. then simply set the position of your turret according to the mouse position

[nav123]

package guiexample;

import java.awt.MouseInfo;
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 java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
import sun.audio.*;

class TankController1 implements KeyListener, MouseListener, MouseMotionListener {

private Tank tank = null;
private TankView view = null;
int n, check = 0;
double w, h;

public void keyPressed(KeyEvent e) {
System.out.println(tank.ra);
if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
tank.ra += 0.1;
if (tank.ra < 2 * Math.PI) {
System.out.println(tank.ra);
tank.ra = 360;
}
} else if (e.getKeyCode() == KeyEvent.VK_LEFT) {
tank.setVy(0);
tank.ra -= 0.1;
if (tank.ra < 2 * Math.PI) {
System.out.println(tank.ra);
tank.ra = 360;
}
} else if (e.getKeyCode() == KeyEvent.VK_DOWN) {
tank.setVy(tank.getVy() + 0.2);
System.out.println("y= " + tank.getY());
} else if (e.getKeyCode() == KeyEvent.VK_UP) {
tank.setVy(tank.getVy() - 0.2);
}

public Tank getTank() {
return tank;
}

public void setTank(Tank tank) {
this.tank = tank;
}

public TankView getView() {
return view;
}

public void setView(TankView view) {
this.view = view;
}

public void mouseMoved(MouseEvent e) {
/* System.out.println("y= " + tank.getY());
System.out.println("m y= " + MouseInfo.getPointerInfo().getLocation().y);
System.out.println("m x= " + MouseInfo.getPointerInfo().getLocation().x);*/
//throw new UnsupportedOperationException("Not supported yet.");
}

public void doUpdateGameLogic() {
tank.setY(tank.getY() + tank.getVy());
}
}

This is all i have right now. I am using MVC architecture for this program.

[JosAH]

This is all i have right now. I am using MVC architecture for this program.

if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
tank.ra += 0.1;
if (tank.ra < 2 * Math.PI) {
System.out.println(tank.ra);
tank.ra = 360;
}
} else if (e.getKeyCode() == KeyEvent.VK_LEFT) {
tank.setVy(0);
tank.ra -= 0.1;
if (tank.ra < 2 * Math.PI) {
System.out.println(tank.ra);
tank.ra = 360;
}

Going from radians to degrees spontaneously is never correct. Also, I think it makes more sense if you'd set the angle to zero if it happens to be less than zero (to be more symmetrical when you rotate the other way around.

kind regards,

Jos

[nav123]

g.setColor(Color.red);
g.drawLine((int) (tank.getX() + 15), (int) (tank.getY() + 14), (MouseInfo.getPointerInfo().getLocation().x), MouseInfo.getPointerInfo().getLocation().y);

This is for the laser on my tank. The line still follows the mouse even if it's out of the JFrame. Is there another way of getting the x and y location of the mouse or am i doing anything wrong?