fromArray( array, offset = 0 ) {

		this.x = array[ offset ];
		this.y = array[ offset + 1 ];
		this.z = array[ offset + 2 ];
		this.w = array[ offset + 3 ];

		return this;

	}
Sets this vector's x value to be `array[ offset ]`, y value to be `array[ offset + 1 ]`,
z value to be `array[ offset + 2 ]`, w value to be `array[ offset + 3 ]`.

@param {Array<number>} array - An array holding the vector component values.
@param {number} [offset=0] - The offset into the array.
@return {Vector4} A reference to this vector.