Method add

packages/melonjs/src/math/observableVector3d.ts:167–169

* Add the passed vector to this vector * @param v other vector * @returns Reference to this object for method chaining

(v: Vector2d | Vector3d | ObservableVector3d)

	 * @returns Reference to this object for method chaining
	 */
	add(v: Vector2d | Vector3d | ObservableVector3d) {
		return this.set(this.x + v.x, this.y + v.y, this.z + ("z" in v ? v.z : 0));
	}

	/**
	 * Subtract the passed vector from this vector