[vtkusers] problem with unstructured grid

stefano mininel mininel.ml at gnbts.univ.trieste.it
Wed Jul 3 03:04:31 EDT 2002


Don't know about the error messages but for visualization speed use vtkLODActor instead of
vtkActor.
Wireframe is probably not quicker in rendering than polygons. Nowadays graphic cards (as far as
I know) are maybe quicker in drawing polygons than wireframe.

Silke.Karner at ecs.steyr.com wrote:

> Hi!
> Hope somebody can help me. I have to write a tool to visualize very large
> data sets in the form of an unstructured grid. But the visualization runs
> very slow when you try to zoom or move it. And although it draws everything
> as it should, I get an error message:
>
> ---------
> ERROR In vtkFieldDataToAttributeDataFilter.cxx, line 345
> vtkFieldDataToAttributeDataFilter (0x20327f38): Can't find array/component
> requested
> ERROR In vtkWarpVector.cxx, line 61
> vtkWarpVector (0x20337038): No input data
> --------------
>
> At the moment eyerything is drawn in wireframe, and it's slow. But later it
> should be hidden-line or coloured. I have not tried how slow it'll be then.
> I post a part of the code. Maybe I have understand something wrong cause
> I'am a newbie to vtk and tcl/tk.
>
> Thanks for any help
> Silke  ...(CUT)




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