fromBufferAttribute( attribute, index ) {

		this.x = attribute.getX( index );
		this.y = attribute.getY( index );
		this.z = attribute.getZ( index );
		this.w = attribute.getW( index );

		return this;

	}
Sets the components of this vector from the given buffer attribute.

@param {BufferAttribute} attribute - The buffer attribute holding vector data.
@param {number} index - The index into the attribute.
@return {Vector4} A reference to this vector.