CameraActuatorSystem.java

package com.indignado.logicbricks.systems.actuators;

import com.badlogic.ashley.core.Entity;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.physics.box2d.Transform;
import com.indignado.logicbricks.components.RigidBodiesComponents;
import com.indignado.logicbricks.components.actuators.CameraActuatorComponent;
import com.indignado.logicbricks.core.actuators.CameraActuator;

/**
 * @author Rubentxu
 */
public class CameraActuatorSystem extends ActuatorSystem<CameraActuator, CameraActuatorComponent> {


    public CameraActuatorSystem() {
        super(CameraActuatorComponent.class);

    }


    @Override
    public void processActuator(CameraActuator actuator, float deltaTime) {
        Entity target = null;
        if(actuator.followEntity != null)
            target = actuator.followEntity;
        else if(actuator.followTagEntity != null)
            actuator.followEntity = target = engine.getEntities(actuator.followTagEntity).first();

        if(target != null) {
            RigidBodiesComponents rc = target.getComponent(RigidBodiesComponents.class);
            Transform transform = rc.rigidBodies.first().getTransform();
            Vector3 position = actuator.camera.position;
            position.x += (transform.getPosition().x - position.x) * actuator.damping;
            position.y += (transform.getPosition().y - position.y) * actuator.damping;
        }

    }



}