[vtk-developers] Can algorithm has algorithm subpipline inside and how correctly combine theirs outputs inside one structure

[Jana Sefcikova]

Hi all,

I would like implement an algorithm working on polydata that computes
inside it normals, curvatures and store them in compact form (I called it
wrapper class) .
Wrapper class should support operation GetNormal(id), GetCurvature(id),
GetColor(id), id is the vertex id.
I do not take normlas as input to the algorithm, because it change polydata
topology, moreover I would like have generic solution, if input polydata
have normals I will use them, if no I will compute them.

Is there any example of VTK algorithm containig subpipline inside or
combining multiple vertex arrays that could I use for learning how to do it
correctly in vtk ?
Can be wrapper concept realise correctly, or I have to somehow wire
subpipline ?

I made it inside my vtkAlgorithm in RequestData, by firstly computing
normals (using vtkNormalGenerator), than curvatures (vtkCurvatures) and
than I instantiate my wrapper class (does not inherite from any one ) that
stores curvature and normals arrays with polydata. Every time RequesData is
called, I recompute it.



Any advice would be appreciate.
Jana
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