package engine.camera;

import engine.Engine;
import engine.math.Vector3f;
import engine.object.ObjectGl;

public class TrackingSF3ThirdStrick implements TrackingDummy {

    private final ObjectGl obj1;
    private final ObjectGl obj2;
    private final Engine engine;

    /**
     * Un tracking ou les personnages "pousse" la camera
     */
    public TrackingSF3ThirdStrick(ObjectGl obj1, ObjectGl obj2, Engine engine){
        this.obj1 = obj1;
        this.obj2 = obj2;
        this.engine = engine;
    }

    @Override
    public Vector3f getViewVector() {
        Vector3f vec = new Vector3f();

        float viewXPos = -this.engine.getViewXPos();
        float dimension = this.engine.getCamera().getDimension();

        ObjectGl left = obj1.getXPos() >= obj2.getXPos() ? obj2 : obj1;
        ObjectGl right = obj1.getXPos() < obj2.getXPos() ? obj2 : obj1;

       if ((right.getXPos() + right.getWidth() * right.getScalingFactor()) > viewXPos + dimension){
           vec.x = - Math.abs((right.getXPos() + right.getWidth() * right.getScalingFactor()) - (viewXPos + dimension));
       } else if (left.getXPos() < viewXPos - dimension){
           vec.x = Math.abs(left.getXPos() - (viewXPos - dimension));
       }

       return vec;
    }
}