2D contours from mesh / plane intersection

[Ingmar]

@Nicolas_Rannou did you manage to visualize the contour intersection? I tried the same in python, but the intersection seems infinitesimally thin, and I don’t know how to inflate / dilate to make it actually visible along the normal …

how to get a "thick" poly line from vtkPlaneCutter & vtkPolyData?

I am trying to cut a mesh with a plane and render the contour on top of an image (resliced along using the same plane), much like the image below: [image] The examples at https://gitlab.kitware.com/vtk/vtk/-/blob/v9.1.0/Filters/Core/Testing/Python/TestPolyDataPlaneCutter.py almost do the slicing part that I need But when viewing the contour from the direction of the normal the contour / polyline is invisible (see screenshot below left side) as opposed to viewing it from the side (right side o…