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

[Cory Quammen]

Ooops, I gave you a not-fully-Python snippet. Try

pgt.SetOutputPointsPrecision(vtk.vtkAlgorithm.DOUBLE_PRECISION )

instead.

On Tue, Aug 18, 2015 at 1:17 PM, Cory Quammen <cory.quammen at kitware.com>
wrote:

> pgt.SetOutputPointsPrecision(vtkAlgorithm::DOUBLE_PRECISION )
>
> should work. Let us know if it doesn't.
>
> On Tue, Aug 18, 2015 at 11:07 AM, Jaap Verheggen <jpmverheggen at gmail.com>
> wrote:
>
>>
>>
>> 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
>>
>>
>>
>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>
>> Follow this link to subscribe/unsubscribe:
>> http://public.kitware.com/mailman/listinfo/vtkusers
>>
>>
>
>
> --
> Cory Quammen
> R&D Engineer
> Kitware, Inc.
>



-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtkusers/attachments/20150818/48b16f70/attachment.html>