Method projectN

packages/melonjs/src/math/vector3d.ts:472–475

* Project this vector onto a vector of unit length. * This is slightly more efficient than `project` when dealing with unit vectors. * @param v - The unit vector to project onto. * @returns Reference to this object for method chaining

(v: Vector2d | Vector3d)

	 * @returns Reference to this object for method chaining
	 */
	projectN(v: Vector2d | Vector3d) {
		const ratio = this.dot(v) / v.length2();
		return this.scale(ratio, ratio, ratio);
	}

	/**
	 * return a clone copy of this vector