set( x, y, z ) {

		if ( z === undefined ) z = this.z; // sprite.scale.set(x,y)

		this.x = x;
		this.y = y;
		this.z = z;

		return this;

	}
Sets the vector components.

@param {number} x - The value of the x component.
@param {number} y - The value of the y component.
@param {number} z - The value of the z component.
@return {Vector3} A reference to this vector.