[vtkusers] How to making an object hierarchy ?

[N.Tsagarakis]

Hi everybody

I am inerested in building a robot arm simulator using the VTK. 

To make the different part of the arm to move together I tried to use the vtkAssemby node
However I realised that although the different parts of the arm are now move together when I move the 
assembly, when I tried to rotate an intermidiate object (lets say the elbow joint)  in the assembly hierarchy the object was rotating 
independently from the rest of the assembly's objects. 

Can anyone know how to make in VTK 3D an object hierarchy where the motion or rotation of any object in the hierarchy tree affects 
the objects that are below the moving object ?



Nick




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