Hi,<br />
don't create for every node a single actor. This slows down the rendering process in case you have 10000+ nodes or the like. <br/>Use Glyph3D instead.<br/>
Having one actor in total is enough to render an unstructured grid. Nodes should be represented as glyphs having spheres as the source.<br/> Please refer to the <a href="http://www.vtk.org/Wiki/VTK/Examples/Cxx" target="_top" rel="nofollow" link="external">c++ samples in VTK-WIKI</a> or to <a href="http://www.vtk.org/Wiki/VTK/Examples/Python" target="_top" rel="nofollow" link="external">python samples in VTK-WIKI</a> to learn more about displaying unstructured grids and using glyphs respectively glyph3d.
<br/><br/>
In case you need more assistance on that you're welcome to come back to me, being aware my response time won't be the fastest due to the fact I'm working very hard in the moment. Sorry for that.<br/><br/>
with best regards<br/>
Jochen
        
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