I've put together a pretty simple demo of what I'm trying to do. In the picture you'll see a top-down view of a wireframe grid and a bunch of instanced grids that were created using a popnet to copy SOP from the wireframe grid as it rotated around a pivot.
In a nutshell I want the instanced grids to inherit the master grid's orientation. Is there a way to do this *other* than sorting the points and using $TX2-$TX/$TY2-$TY/$TZ2-$TZ in a point SOP to set the normals? In this example I know it would work, but if the number of emitting faces is changing every frame then the points would be less orderly and not line up.
As always, any suggestions would be greatly appreciated!
Edited by etudenc, 13 June 2012 - 08:10 PM.