[vtkusers] how to check if a polydata is changed or not

Ahmet Doğan isimtic at gmail.com
Wed Aug 13 04:29:08 EDT 2014

if a polydata is changed(i.e. points or cells) is there a special 
way(which is changed point or cell) or a signal(command) or a function 
like last change time(i.e. like file system)

Kind Regards.
Ahmet Dogan

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