package electrosphere.renderer;

import org.joml.Matrix4f;
import org.joml.Quaternionf;
import org.joml.Vector3f;

/**
 *
 * @author satellite
 */
@Deprecated
public class Camera {
    public Vector3f pos_Center = new Vector3f(0,0,0);
//    public Vector3f pos_Front = new Vector3f(0,0,0);
//    public Vector3f pos_Top = new Vector3f(0,0,0);
    public Quaternionf rotation = new Quaternionf();
    public Camera(){
        
    }
    
    public void apply_camera(Camera c){
        pos_Center = new Vector3f(c.pos_Center);
        rotation = new Quaternionf(c.rotation);
    }
    
    public Matrix4f get_view_matrix(){
        Matrix4f rVal = new Matrix4f();
//        rVal.setLookAt(pos_Center, pos_Front, pos_Top);
        Vector3f up = new Vector3f(pos_Center);
        //new Vector3f(pos_Center).add(new Quaternionf(rotation)..transform(new Vector3f(1,0,0)))
        Vector3f up_modifier = new Vector3f(1,0,0);
        Quaternionf up_transformation = new Quaternionf(rotation);
        up_transformation.rotateAxis((float)Math.PI/2.0f, new Vector3f(up).cross(new Vector3f(0,1,0))); // the hard part is getting the axis in this logic to correspond to the vertical
        up = up.add(up_transformation.transform(up_modifier));
        rVal.setLookAt(pos_Center, //where our camera is
                new Vector3f(pos_Center).add(rotation.transform(new Vector3f(1,0,0))), //where our camera wants to look
                up); //where "up" is relative to our camera
        return rVal;
    }
}