[vtkusers] re:Getting a volume's contour vertices

[Yixun Liu]

Hi,
1.I suggest you use vtkMarchingCubes, which is specialized to volume data.

vtkMarchingCubes is a filter that takes as input a volume (e.g., 3D structured point set) and generates on output one or more isosurfaces. One or more contour values must be specified to generate the isosurfaces. Alternatively, you can specify a min/max scalar range and the number of contours to generate a series of evenly spaced contour values.

2.GetPoints() is the right method, but be sure you have called MarchingFilter->Update() before. 

I suggest you firstly render the isosurface using vtk to ensure you get the right surface and then export this surface.

Hope it help.

Yixun Liu

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