[vtkusers] data for 3D surface

[Doug Henry]

thanks, code is always helpful if its easy for you to find, otherwise I'll 
figure it out. I'm always looking for different ways to do things with vtk, 
sometimes the code that doesn't solve the immediate problem will teach me 
something I can use later. Stringing filters together to tweak data in the 
pipeline seems easy in vtk. I don't quite have my hands around how to get my 
data in to a useable form by vtk yet, but I imagine (or hope) the light will 
turn on eventually.

-thanks again


On 6/30/05, Malcolm Drummond <malcolm at geovision.co.za> wrote:
> 
> Hi Doug
>  I'd convert your data into x,y,z then run it through vtkDelaunay2D (which 
> just uses x and y for the triangulation). This will give you a triangulated 
> mesh as vtkPolyData output. The points do not need to be regular.
>  If you want a regular grid you could convert the z values to scalars with 
> vtkElevation filter and resample with vtkShepardMethod. I did this a long, 
> long time ago but could probably dig out some demo code if you want it.
>  HTH
> Malcolm Drummond
> GeoVision cc
> 
> ----- Original Message ----- 
> *From:* Doug Henry <brilligent at gmail.com> 
> *To:* VTK <vtkusers at vtk.org> 
> *Sent:* Thursday, June 30, 2005 2:46 PM
> *Subject:* [vtkusers] data for 3D surface
> 
> I am looking to make a surface plot similar to matlab's surf function. I 
> have location (az,el) and magnitude data, which can easily be turned in to 
> x,y,z data if needed, and I would like to create a simple surface (mesh) 
> from this data. What options are available for doing this? Do I need data at 
> regular intervals, I saw reference to structured and unstructured grids.
> 
> -thanks
> 
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