Problems With Adding A Custom Attribute

[cspears2002]

I'm working through a tutorial out of "The Magic of Houdini". As part of the tutorial, I am trying to add a custom attribute called ballcolor to a soccerball. The value of ballcolor for the white parts of the ball should be 1 and 0 for the black. All of the white parts are grouped together in a group called GRcolorWhite, and the black is grouped in GRcolorBlack.

I created an AttribCreate SOP called makeBallColor. I set the group to GRcolorWhite, gave the name ballcolor to the attribute, set the Class to primitive, the Type to Integer, and the first field in Value to 1. A ballcolor was created, but it was to 0 for both groups. What am I doing wrong?

soccerball_chap10_v03.hipnc

[sibarrick]

When you apply your extrude sops the 2 groups are destroyed and both have 0 members, hence the final attribute create fails to work as you expect.

To fix this move the makeBallColor sop above the polyexBlack sop.