[vtkusers] need help in vtkMarchingCubes Python!!

[Shawn Waldon]

Have you tried calling Update() on the contour and the mapper after setting
their input?

Hope this helps,

Shawn


On Fri, Jun 14, 2013 at 4:30 AM, dalhotha <dhothali at hotmail.com> wrote:

> hello,
>
> i'm a novice in vtk.
>
> I'm trying to do volume rendering.
> i segmented an  object using Itk-snap. I saved it as vtk data file. i found
> that all what i have in the file  is POINTS 26829 float , there is no
> cells.
> ive used vtkMarchingCubes as follow to get the surface but nothing appear.
> any help please..
>
>
>
> import vtk
>
> input='test.vtk'
>
> ## read the file
> reader = vtk.vtkPolyDataReader()
> reader.SetFileName(input)
> reader.Update()
>
>
>
> ## surface generation
> contour = vtk.vtkMarchingCubes()
> contour.SetInput(reader.GetOutput())
>
> ## mapper
> mapper = vtk.vtkPolyDataMapper()
> mapper.SetInput(contour.GetOutput())
>
> ## the actor
> actor = vtk.vtkActor()
> actor.SetMapper(mapper)
>
> ## renderer and render window
> ren = vtk.vtkRenderer()
> ren.SetBackground(1, 0, 1)
> ## add the actors to the renderer
> ren.AddActor(actor)
>
> renWin = vtk.vtkRenderWindow()
> renWin.SetSize(512, 512)
> renWin.AddRenderer(ren)
>
> ## render window interactor
> iren = vtk.vtkRenderWindowInteractor()
> iren.SetRenderWindow(renWin)
>
>
> ## initialize and start the interactor
> iren.Initialize()
>
> ## render
> renWin.Render()
> iren.Start()
>
>
>
>
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