Mark Weir

If I do this Houdini complains that it sees the group as an undefined variable. Any suggestions?

I would like to create a SOP that filters points by their color. Can anyone give me a hint as to how I can achieve this with VEX?

I can create a group node based on a current geometry selection. Doing so creates a group node instance with a pattern initialized to the selection.

I would like to use the same mechanism for my custom SOP. That is, I would like to intialize the SOP with the current selection pattern.

I have no idea where the group nodes pull this initialization data from. Can anyone point me in the right direction?

Thanks.