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Bind VOP - Use input value if not bound Feb. 20, 2017, 5:29 p.m.

And I don’t get your 3rd case
When I activate or deactivate attribwrangle_height2 the result stays the same

it does because you have export on and as I said if the export is on it behaves the same as 2. and that regardles of whether Use Input Value If Bound is on or off
do you really want to be exporting it?

Beside this, I don't get your 3rd case second point either:
however by setting export the attribute may be created/modified (following Export parm setting)
export simply means that an attribute of the same name and type will be created and populated with the input value or even default value if export is set to Always
that as well means that it will overwrite the value of that attribute if it already existed

and yes, Bind is just stripped off Parmeter VOP, we used to use Parameter VOP with invisible option for that before Bind was introduced
both bind to attributes by name/type, both can export values, but Parameter VOP can show as parameter on your Vopnet and Bind can't

Houdini equivalent to the 3ds max "cut" tool? Feb. 20, 2017, 4:13 p.m.

you can either do Edge Cusp SOP and use splitPathGroup as Group
that will disconnect the geo on split, then use Assemble SOP to get your groups or just use Connectivity SOP to get class attrib which you can use to directly to refer to individual regions

or you can do it without splitting, by directly use Connectivity SOP in Prim mode and specify splitPathGroup in Seam Group

centroid of input node Feb. 20, 2017, 1:24 a.m.

just use input index (0,1,2,…)
so to get centroid in x of the first input it would be
you can as well use opinputpath() which offers some more flexibility in some cases
so the same would be