<!-- NEW5 — TEST 5 · THE BEND AT THE HEART · part 47 -->
*/
	setScalar( scalar ) {

		this.x = scalar;
		this.y = scalar;
		this.z = scalar;
		this.w = scalar;

		return this;

	}

	/**
	 * Sets the vector's x component to the given value
	 *
	 * @param {number} x - The value to set.
	 * @return {Vector4} A reference to this vector.
	 */
	setX( x ) {

		this.x = x;

		return this;

	}

	/**
	 * Sets the vector's y component to the given value
	 *
	 * @param {number} y - The value to set.
	 * @return {Vector4} A reference to this vector.
	 */
	setY( y ) {

		this.y = y;

		return this;

	}

	/**
	 * Sets the vector's z component to the given value
	 *
	 * @param {number} z - The value to set.
	 * @return {Vector4} A reference to this vector.
	 */
	setZ( z ) {

		this.z = z;

		return this;

	}

	/**
	 * Sets the vector's w component to the given value
	 *
	 * @param {number} w - The value to set.
	 * @return {Vector4} A reference to this vector.
	 */
	setW( w ) {

		this.w = w;

		return this;

	}

	/**
	 * Allows to set a vector component with an index.
	 *
	 * @param {number} index - The component index. `0` equals to x, `1` equals to y,
	 * `2` equals to z, `3` equals to w.
	 * @param {number} value - The value to set.
	 * @return {Vector4} A reference to this vector.
	 */
	setComponent( index, value ) {

		switch ( index ) {

			case 0: this.x = value; break;
			case 1: this.y = value; break;
			case 2: this.z = value; break;
			case 3: this.w = value; break;
			default: throw new Error( 'THREE.Vector4: index is out of range: ' + index );

		}

		return this;

	}

	/**
	 * Returns the value of the vector component which matches the given index.
	 *
	 * @param {number} index - The component index. `0` equals to x, `1` equals to y,
	 * `2` equals to z, `3` equals to w.
	 * @return {number} A vector component value.
	 */
	getComponent( index ) {

		switch ( index ) {

			case 0: return this.x;
			case 1: return this.y;
			case 2: return this.z;
			case 3: return this.w;
			default: throw new Error( 'THREE.Vector4: index is out of range: ' + index );

		}

	}

	/**
	 * Returns a new vector with copied values from this instance.
	 *
	 * @return {Vector4} A clone of this instance.
	 */
	clone() {

		return new this.constructor( this.x, this.y, this.z, this.w );

	}

	/**
	 * Copies the values of the given vector to this instance.
	 *
	 * @param {Vector3|Vector4} v - The vector to copy.
	 * @return {Vector4} A reference to this vector.
	 */
	copy( v ) {

		this.x = v.x;
		this.y = v.y;
		this.z = v.z;
		this.w = ( v.w !== undefined ) ? v.w : 1;

		return this;

	}

	/**
	 * Adds the given vector to this instance.
	 *
	 * @param {Vector4} v - The vector to add.
	 * @return {Vector4} A reference to this vector.
	 */
	add( v ) {

		this.x += v.x;
		this.y += v.y;
		this.z += v.z;
		this.w += v.w;

		return this;

	}

	/**
	 * Adds the given scalar value to all components of this instance.
	 *
	 * @param {number} s - The scalar to add.
	 * @return {Vector4} A reference to this vector.
	 */
	addScalar( s ) {

		this.x += s;
		this.y += s;
		this.z += s;
		this.w += s;

		return this;

	}

	/**
	 * Adds the given vectors and stores the result in this instance.
	 *
	 * @param {Vector4} a - The first vector.
	 * @param {Vector4} b - The second vector.
	 * @return {Vector4} A reference to this vector.
	 */
	addVectors( a, b ) {

		this.x = a.x + b.x;
		this.y = a.y + b.y;
		this.z = a.z + b.z;
		this.w = a.w + b.w;

		return this;

	}

	/**
	 * Adds the given vector scaled by the given factor to this instance.
	 *
	 * @param {Vector4} v - The vector.
	 * @param {number} s - The factor that scales `v`.
	 * @return {Vector4} A reference to this vector.
	 */
	addScaledVector( v, s ) {

		this.x += v.x * s;
		this.y += v.y * s;
		this.z += v.z * s;
		this.w += v.w * s;

		return this;

	}

	/**
	 * Subtracts the given vector from this instance.
	 *
	 * @param {Vector4} v - The vector to subtract.
	 * @return {Vector4} A reference to this vector.
	 */
	sub( v ) {

		this.x -= v.x;
		this.y -= v.y;
		this.z -= v.z;
		this.w -= v.w;

		return this;

	}

	/**
	 * Subtracts the given scalar value from all components of this instance.
	 *
	 * @param {number} s - The scalar to subtract.
	 * @return {Vector4} A reference to this vector.
	 */
	subScalar( s ) {

		this.x -= s;
		this.y -= s;
		this.z -= s;
		this.w -= s;

		return this;

	}

	/**
	 * Subtracts the given vectors and stores the result in this instance.
	 *
	 * @param {Vector4} a - The first vector.
	 * @param {Vector4} b - The second vector.
	 * @return {Vector4} A reference to this vector.
	 */
	subVectors( a, b ) {

		this.x = a.x - b.x;
		this.y = a.y - b.y;
		this.z = a.z - b.z;
		this.w = a.w - b.w;

		return this;

	}

	/**
	 * Multiplies the given vector with this instance.
	 *
	 * @param {Vector4} v - The vector to multiply.
	 * @return {Vector4} A reference to this vector.
	 */
	multiply( v ) {

		this.x *= v.x;
		this.y *= v.y;
		this.z *= v.z;
		this.w *=