I have a volume with density values from an isooffset node.
Inside is 1.0 outside is 0.0 but on the border I have all kind of values ranging from 0 to 1.
How can I discretize / binarize the values with houdini ?
ATM I am using a python node with a numpy.where statement which is really slow ..
Maybe with a volume wrangle node ?
but how could I formulate the condition ?

Either a Round To Integer VOP node inside a Volume VOP SOP, or a rint() function in a wrangle.

rint() is the way to go, but just out of interest .. is it possible to have conditions in wrangle expressions ?

dulo
rint() is the way to go, but just out of interest .. is it possible to have conditions in wrangle expressions ?

Yes.