[vtkusers] Problems with multiple vtkSphereWidgets

Cory Quammen cory.quammen at kitware.com
Thu Oct 9 17:03:33 EDT 2014


VTK does not perform well with many actors, so if you have a separate
vtkActor for each sphere, performance can get very slow.

You might want to try vtkGlyph3D with your marker points set as the input.

See http://www.vtk.org/Wiki/VTK/Examples/Cxx/Filtering/Glyph3D for an
example of how this is done with box glyphs. You can change the
vtkCubeSource to vtkSphereSource for your application.

Hope that helps,

On Thu, Oct 9, 2014 at 4:32 PM, rkhare <rahul.vedic at gmail.com> wrote:
> Hi,
> I have an application where I place sphere widgets to mark points in a 3D
> volume. Whenever I slice through the volume, I change the visibility of the
> widgets by turning them on and off. It works fine if there are only 1 or 2
> widgets. However, once the number of widgets go up, the slicing becomes real
> slow. Has anyone else come across this problem? Can anyone suggest a
> solution?
> Thank you.
> Rahul.
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