1) I have 2 prims, a box and a sphere. I add each to their own groups called grp_box and grp_sphere. The sphere is half the scale of the box, but it could be any size.

2) I merge them before feeding them into a wrangle.

3) In the wrangle I want to getbbox of just the sphere. Since getbbox relies on a primnum, but these are merged into one prim how do I essentially extract the sphere in Vex as its own prim and get its bbox?

thanks in advance!

traden1976
In the wrangle I want to getbbox of just the sphere. Since getbbox relies on a primnum, but these are merged into one prim how do I essentially extract the sphere in Vex as its own prim and get its bbox?

getbbox() doesn't rely on primnum, also box and sphere are not a single prim
you probably meant it relies on input or geo and now they are both part of a single geo

you can still use group to get bbox of the group
so something like

I totally missed that in the docs. Thanks @tamte