[vtkusers] Visualizing a surface

[Chiranjib Sur]

If the points in the polydata comes with the normals, you can try Poisson
Surface Construction.

I have make Delaunay3D filter works for creating surfaces for points (e.g.
same for your DamBreak problem) followed by the Surface Decimation filter.

Hope that helps.


Thanks and regards,
Chiranjib

On Tue, Apr 24, 2018 at 5:18 PM, pauldoesntlikesurfaceextractio <
paul_geus at hotmail.com> wrote:

> Dear all,
>
> I have a set of points (around 0.5 million) and I want to visualize these
> as
> a surface/volume. I am programming in c++ and using vtk 8.0
> I have extracted the surface points of the dataset to reduce the size.
>
> The points show an arbitrary timestep of a dambreak.
> I have tried the following approaches:
>
> VTKExtractSurface; Problem: The wave is not shown accurately. I have tried
> increasing the samplesize for the normals,   Decreasing the radius for the
> calculation of the distances and smoothing the surface. The Result was not
> satisfactory
> (https://lorensen.github.io/VTKExamples/site/Cxx/Points/ExtractSurface/)
>
> Delaunay3D; Problem: Mainly useable for convex shapes and the triangle
> visualization is not nice for a fluid, further problem: Alpha value needs
> to
> be adjusted for each simulation
>
> Marching Cubes; Problem: I can't get it to work, I have basically copied
> every step from the tutorial:
> https://lorensen.github.io/VTKExamples/site/Cxx/Modelling/MarchingCubes/
> I can't understand where i went wrong there
>
> GaussianSplatter; Problem: The Points(spheres) are visible, this means it
> is
> not a surface, but spheres  test2.xyz
> <http://vtk.1045678.n5.nabble.com/file/t342366/test2.xyz>  which overlap.
>
> What other approach is there?
> Am I maybe using the one of the features wrong?
>
> I have attached my points below.
> Kind regards and hopefully someone can help me :)
>
>
>
>
> --
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