/**
 * Looks from currentPosition to targetPosition (default up is 0,1,0)
 * @param id
 * @param name
 * @param currentPosition GameLib.API.Vector3
 * @param targetPosition GameLib.API.Vector3
 * @param targetPositionOffset GameLib.API.Vector3
 * @param rotationSpeed Number
 * @param lookAtMatrix GameLib.API.Matrix4
 * @param up GameLib.API.Vector3
 * @param currentRotation GameLib.API.Quaternion
 * @constructor
 */
GameLib.D3.API.LookAt = function (
    id,
    name,
    currentPosition,
    targetPosition,
    targetPositionOffset,
    rotationSpeed,
    lookAtMatrix,
    up,
    currentRotation
) {

    if (GameLib.Utils.UndefinedOrNull(id)) {
        id = GameLib.Utils.RandomId();
    }
    this.id = id;

    if (GameLib.Utils.UndefinedOrNull(name)) {
        name = this.constructor.name;
    }
    this.name = name;

    if(GameLib.Utils.UndefinedOrNull(currentPosition)) {
        currentPosition = new GameLib.API.Vector3(0, 10, 10);
    }
    this.currentPosition = currentPosition;

    if(GameLib.Utils.UndefinedOrNull(targetPosition)) {
        targetPosition = new GameLib.API.Vector3(0, 0, 0);
    }
    this.targetPosition = targetPosition;

    if(GameLib.Utils.UndefinedOrNull(targetPositionOffset)) {
        targetPositionOffset = new GameLib.API.Vector3(0, 0, 0);
    }
    this.targetPositionOffset = targetPositionOffset;

    if (GameLib.Utils.UndefinedOrNull(rotationSpeed)) {
        rotationSpeed = 22.0;
    }
    this.rotationSpeed = rotationSpeed;

    if (GameLib.Utils.UndefinedOrNull(lookAtMatrix)) {
        lookAtMatrix = new GameLib.API.Matrix4();
    }
    this.lookAtMatrix = lookAtMatrix;

    if(GameLib.Utils.UndefinedOrNull(up)) {
        up = new GameLib.API.Vector3(0, 1, 0);
    }
    this.up = up;

    if(GameLib.Utils.UndefinedOrNull(currentRotation)) {
        currentRotation = new GameLib.API.Quaternion();
    }
    this.currentRotation = currentRotation;
};