Displace SOP Only in XY directions
When we apply a noiseSOP to a Shape the noiseSOP displaces the vertex of the shape in the X,Y and Z direction.
In some cases we just want to displace the Vertex Points for example only in the XY direction. To achieve that we
can convert the SOP into a CHOP and then reassign the channels of the SOP in the chopToSop to the Normals N.