How to copy stamp random groups?

[Ber]

Hi everyone,

I've a basic question about copy stamping.

How can I randomly copy different groups on points.
Instead of switching between different geos with stamp expression in a switch node, i want to switch between different groups from the same node (and copy them on points).
It looks to be easy but I'm a bit lost. Any idea ?

Thanks
Bertrand

[iamyog]

Easiest way is just to split your incoming geo by groups, creating "different geos" to connect into a switch driven by your stamp function.

[Ber]

Hi, Thanks for your quick reply!

I'm currently working with this process, but i've thousand groups ... so I'm looking for another way to do that :/

Any other idea ? 

Thanks!

Bertrand

 

[iamyog]

This could help: http://www.tokeru.com/cgwiki/index.php?title=HoudiniVex#Access_group_names_procedurally_in_vex

 

Metesla gives an example to have your group names in an array and how to delete randomly per frame.

Your stamp function can replace the random part.

[Ber]

I'll check that !
Thanks iamyog !

[fathom]

pack each group into a single packed prim.  then use a point wrangle to delete all points not equal to the one you want (randomly selected via stamp function).

 

you're probably packing in your copy sop, so disable that since everything is already packed.