RotationMover.java

package de.fau.cs.mad.fly.game.object;

import com.badlogic.gdx.math.Vector3;

import de.fau.cs.mad.fly.game.GameObject;

/**
 * Game object mover which rotates the game object and its rigid body.
 * 
 * @author Tobi
 * 
 */
public class RotationMover implements IGameObjectMover {
    private GameObject gameObject;
    private boolean active;
    
    private Vector3 rotation = new Vector3();
    private float degrees = 0.0f;
    
    /**
     * Creates a new rotation mover.
     * 
     * @param gameObject
     *            The game object to which the mover belongs.
     */
    public RotationMover(GameObject gameObject) {
        this.gameObject = gameObject;
        this.active = true;
    }
    
    /**
     * Setter for the rotation.
     * 
     * @param rotation
     *            The rotation vector. Becomes normalized.
     * @param degrees
     *            The degrees per frame.
     */
    public void setRotation(Vector3 rotation, float degrees) {
        this.rotation = rotation.nor();
        this.degrees = degrees;
    }
    
    /**
     * Setter for the rotation. The degrees per frame are calculated as length
     * of the vector.
     * 
     * @param rotation
     *            The rotation vector. Becomes normalized.
     */
    public void setRotation(Vector3 rotation) {
        this.degrees = rotation.len();
        this.rotation = rotation.nor();
    }
    
    @Override
    public void move(float delta) {
    	if(!active) {
    		return;
    	}
    	
        gameObject.transform.rotate(rotation, degrees * delta * 10.0f);
        gameObject.getRigidBody().setWorldTransform(gameObject.transform);
    }

	@Override
	public IGameObjectMover getCopy(GameObject gameObject) {
		RotationMover mover = new RotationMover(gameObject);
		mover.setRotation(rotation, degrees);
		return mover;
	}

	@Override
	public void setActive(boolean active) {
		this.active = active;
	}

}