Pavel Pehlivanov

I suspect that new surface tension model for flip included in 15.5.673 is a backport from 16's surface tension, so at least now we have something to play with until the real thing is out (:

It will accept this:
int findclass(int ptclass; int pt) {
if (ptclass != pt) {
ptclass = findclass(ptclass, pt);
}
return ptclass;
}
but will fail again, because:

docs
The functions are in-lined automatically by the compiler, so recursion will not work. To write a recursive algorithm, you should use shader calls instead.

You have to combine it with setattribute vop or just use bind export.