/**
 * Runtime apiVector3 for updating instance objects
 * @param graphics GameLib.D3.Graphics
 * @param parentObject GameLib.D3.*
 * @param apiVector3 GameLib.API.Vector3
 * @param grain Number
 * @constructor
 */
GameLib.Vector3 = function RuntimeVector3(graphics, parentObject, apiVector3, grain) {

    for (var property in apiVector3) {
        if (apiVector3.hasOwnProperty(property)) {
            this[property] = apiVector3[property];
        }
    }

    GameLib.Utils.Extend(GameLib.Vector3, GameLib.API.Vector3);

    this.graphics = graphics;

    this.graphics.isNotThreeThrow();

    this.parentObject = parentObject;

    if (GameLib.Utils.UndefinedOrNull(grain)) {
        grain = 0.001;
    }
    this.grain = grain;

    this.instance = this.createInstance();
};

/**
 * Creates an instance vector3
 * @param update
 * @returns {*}
 */
GameLib.Vector3.prototype.createInstance = function(update) {

    var instance = null;

    if (update) {
        instance = this.instance;
        instance.x = this.x;
        instance.y = this.y;
        instance.z = this.z;
    } else {
        instance = new THREE.Vector3(this.x, this.y, this.z);
    }

    return instance;
};

/**
 * Updates the instance vector, calls updateInstance on the parent object
 */
GameLib.Vector3.prototype.updateInstance = function() {

    this.createInstance(true);

    if (this.parentObject.updateInstance) {
        this.parentObject.updateInstance();
    }
};

/**
 * Converts runtime vector to API Vector
 */
GameLib.Vector3.prototype.toApiVector = function() {
    return new GameLib.API.Vector3(
        this.x,
        this.y,
        this.z
    );
};

/**
 * Converts runtime vector to API Vector
 */
GameLib.Vector3.prototype.copy = function() {
    return new GameLib.Vector3(
        this.graphics,
        this.parentObject,
        new GameLib.API.Vector3(
            this.x,
            this.y,
            this.z
        ),
        this.grain
    )
};