[vtkusers] Fwd: Transform polydata with double precision (vtk, python)

[Jaap Verheggen]

Dear all,

I am trying to transform polydata using double precision using python 
and vtk 5.

I can set the datatype for the points via points.SetDataTypeToDouble() .
I create a surface using Delaunay.
Using delaunay.GetOutput().GetPoints().GetDataType() I can check that I 
still have double as datatype (11)
After the transformation, the datatype is float, 
pgt.GetOutput().GetPoints().GetDataType() gives float (10)

How can I transform the polydata keeping double precision?

Thanks in advance for your answer

Code:
     points = vtk.vtkPoints()
     points.SetDataTypeToDouble()
     vertices = vtk.vtkCellArray()
     ------ # Fill points and vertices with data
     # Create a polydata object
     point_pd = vtk.vtkPolyData()
     # Set the points and vertices as the geometry and topology of the 
polydata
     point_pd.SetPoints(points)
     point_pd.SetVerts(vertices)
     # make the delaunay mesh
     boundary = vtk.vtkPolyData()
     boundary.SetPoints(point_pd.GetPoints())
     boundary.SetPolys(vertices)
     delaunay = vtk.vtkDelaunay2D()
     delaunay.SetInput(point_pd)
     delaunay.SetSource(boundary)
     delaunay.Update()

# Rotate

rotate = vtk.vtkTransform()

rotate.RotateWXYZ(5.0, 0, 0, 1)

pgt=vtk.vtkTransformPolyDataFilter()

pgt.SetTransform(rotate)

pgt.SetInput(delaunay.GetOutput())

pgt.Update()



-- 
---------------------------
Jaap Verheggen



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