[vtkusers] Using vtkContourFilter for Rendering a Point Cloud

[Cory Quammen]

I'm copying to the vtkusers list as a reference so that in the future
others with the same question as you.

Take a look at vtkParticleReader. It looks like it does exactly what
you want. It reads xyz coordinates and a scalar value.

Cory

On Wed, Apr 30, 2008 at 11:30 AM, Moritz Bernard Fricke
<Moritz.Bernard.Fricke at rwth-aachen.de> wrote:
> Cory,
>  how can associate these scalar values in vtk? I think that is my major problem.
>  So, I get the data for each point from a log-file from a ray tracing simulation for acoustics. Can I use vtkFloatArray to create an array of energies? And how can I associate these energies to the Points in my UnstructuredGrid?
>  Thank you for your help, i'm running out of time with this project!
>
>  Moritz
>
>  ----- Ursprüngliche Nachricht -----
>  Von: Cory Quammen <cquammen at cs.unc.edu>
>  Datum: Mittwoch, April 30, 2008 4:59 pm
>  Betreff: Re: Using vtkContourFilter for Rendering a Point Cloud
>  An: moritz.bernard.fricke at rwth-aachen.de, vtkusers at vtk.org
>
>
>
>  > Moritz,
>  >
>  > If your unstructured grid has associated scalar data (in your case,
>  > the energy of the points), then according to the documentation
>  > (http://www.vtk.org/doc/nightly/html/classvtkGaussianSplatter.html),
>  > you can tell the vtkGaussianSplatter to scale the values of the
>  > splatted Gaussian by the scalar value using ScalarWarpingOn().
>  >
>  > Cory
>  >
>  > On Wed, Apr 30, 2008 at 10:04 AM,  <moritz.bernard.fricke at rwth-
>  > aachen.de> wrote:
>  > > Hi Cory,
>  > >  thank you for your answer. i've tried it! I have just build an
>  > Structured Grid of my Points and applied vtkGaussianSplatter at it.
>  > That works, but i want to interpolate the values of the points. How
>  > can I link the energy of one point to its position to make the
>  > energy the criteria for the GaussianSplatter?
>  > >
>  > >  Thank you for your help,
>  > >
>  > >  moritz
>  > >
>  >
>  >
>  >
>  > --
>  > Cory Quammen
>  > Department of Computer Science
>  > University of North Carolina at Chapel Hill
>  > http://www.cs.unc.edu/~cquammen
>  >
>



-- 
Cory Quammen
Department of Computer Science
University of North Carolina at Chapel Hill
http://www.cs.unc.edu/~cquammen