[vtkusers] ways to improve performance

[Mathieu Malaterre]

Mark Gooding wrote:
> Hi all,
> 
> I'm trying to improve the speed of my software when it is creating the
> models to render. The actually rendering/interaction speed is fine,
> but the creation of the actors when I update the data takes quite a
> while. My pipeline is:
> 
> vtkUnsignedCharArray       
> vtkStructuredPoints   
> vtkImageThreshold       
> vtkImageMarchingCubes
> vtkTriangleFilter   
> vtkDecimatePro       
> vtkSmoothPolyDataFilter   
> vtkPolyDataNormals       
> vtkStripper           
> vtkPolyDataMapper   
> vtkActor               
> 
> I believe the slow part of the code is the vtkImageMarchingCubes.
> 
> Are there any suggestions how I could make this run faster? I assume
> because the rendering/interaction is ok that a better graphics card
> won't help. Is this right? or does the pipeline run on the graphics
> card and a flashy graphics card will solve all my worries.


Are you using VTK 5.x ? If so could you please give a try to 
vtkContourFilter (which internally uses vtkSynchronizedTemplates3D).
This filter runs on your cpu so changing graphic card will not help.


HTH
-M