You can see from the pic that I used vex to create new points from original points at 2 primitives and put both original and new points in 4 groups.

However, the geometryspread sheet showed that the 2 new groups had SAME ptnum 8,9,10,11.

I am wondering why it is not 0,1,2,3--8,9,10,11 and 4,5,6,7--12,13,14,15?

Thank you in advance!

Hi,

addpoint returns interim point numbers. If you want to group them using their finalized point numbers, use the setpointgroup VEX function:
https://www.sidefx.com/docs/houdini/vex/functions/setpointgroup.html [www.sidefx.com]

animatrix_
Hi,

addpoint returns interim point numbers. If you want to group them using their finalized point numbers, use the setpointgroup VEX function:
https://www.sidefx.com/docs/houdini/vex/functions/setpointgroup.html [www.sidefx.com]

Unclear. What are interim numbers? in setpointgroup you also need to specify the point number, which is taken from addpoint. So what's the difference?

Yeah, I understood the problem.
During Wrangle execution, numpt is constant, in this case 7, for all primitives. Therefore, addpoint always returns starting from 8 for each primitive, and after executing the Wrangle, Houdini itself renumbers the points, we do not see this.
It turns out that inside the primitive you cannot get a list of new points.

HGaal

animatrix_
Hi,

addpoint returns interim point numbers. If you want to group them using their finalized point numbers, use the setpointgroup VEX function:
https://www.sidefx.com/docs/houdini/vex/functions/setpointgroup.html [www.sidefx.com]

Unclear. What are interim numbers? in setpointgroup you also need to specify the point number, which is taken from addpoint. So what's the difference?

Have you looked at the help card?
https://www.sidefx.com/docs/houdini/vex/functions/addpoint.html [www.sidefx.com]