[vtkusers] How to rotate an actor around a normal of a vertex when given the vertex ?

[Steve Willems]

* First of all, I have to find the Id of that vertex.
 
* Then I will have find the normal, which is already computed, by using the id.

* Finally rotate the object

My problem is where can I find the vertices an its Ids?
    I tried  vtkPolyDataNormals->vtkPolyData->GetVerts()-> and here I have problems with the vtkCellArray to get the vertex

And where can I find the normals which are computed ?
    then I can get the normal that has the same Id as the vertex

Thanx
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20010124/aa7a7051/attachment.htm>