Need Support to display smooth Surface with Interactive Cutting through Model

[Tom_Schulcz]

Hello together,

I wrote a small viewing application with vtk and now want to have a smooth display for curved surfaces of my dataset (UnstructuredGrid) which was loaded from a stl-file.
I also want to be able to cut the model therefore i use vtkPlaneCutter to create the cutlines and vtkClipClosedSurface for the cutsurface.

Both works as I wanted but the normal extraction for the interactivly created cutsurface is to slow to work with it good (in an interactive way, by mouse move event).
I discovered vtkTriangleMeshPointNormals which is way faster but with just exchanging the filter
I get some strange view on the dataset.

Is there a step I missed out in order to display the dataset the same way as it was possible with vtkPolyDataNormals but using the faster vtkTriangleMeshPointNormals.

Is there a different way to achieve my goal?

Here is the code I used for the normals just exchanged the filter:

Looking forward to your response.
Thank You

[jaswantp (Jaswant Panchumarti (Kitware))]

Hello @Tom_Schulcz

I discovered vtkTriangleMeshPointNormals which is way faster but with just exchanging the filter
I get some strange view on the dataset.

Are you certain the output of vtkClipClosedSurface contains only triangles?

Could you please share dataset?

[Tom_Schulcz]

Hello Jaswant,
thank you for your reply. Yes they only contained triangles, but the dataset was indeed the cause. After your answer I tested with several other datasets from the standford site and all other datasets worked so that was the problem thank you for the hint.