Getting coordinates of interpolated points in a vtkPolyData instance

Support
1

Hi VTK-Experts,
I’m using vtkParametricSpline to fit a spline to a set of points. I then render the spline via a vtkPolyDataMapper. I would like to access the coordinates of the interpolated points. Can I get that from the vtkPolyDataMapper? If so, how?
thank you in advance for your help,
-Merps

2

try:

mapper.GetInput().GetPoints()
# or as a numpy array:
from vtk.util.numpy_support import vtk_to_numpy 
vtk_to_numpy(mapper.GetInput().GetPoints().GetData())
3

That did the trick! Thank you Marco. :smile: