just in case the image is dead, assuming a grid lying on XZ plane
A loose relbbox with "input" set to "First Input", plugs into a vecToFloat.
The X and Z outputs plug into the U and V of a fromPolar.
Output of fromPolar goes into a Multiply. A loose makeXForm goes into 2nd input of the multiply.
Output of Multiply goes into the GeoVopOutput P input.
I think this post explains a bit more about how this works, but the rough dummy explanation is that you're making "sort of UV coordinates based on the position of your grid" (hence the relbbox), then you move your points to the uv of the target object.
https://www.sidefx.com/forum/topic/60740/?page=1#post-272057
