applyMatrix3( m ) {

		const x = this.x, y = this.y;
		const e = m.elements;

		this.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ];
		this.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ];

		return this;

	}
Multiplies this vector (with an implicit 1 as the 3rd component) by
the given 3x3 matrix.

@param {Matrix3} m - The matrix to apply.
@return {Vector2} A reference to this vector.