[vtkusers] small objects are not rendered

Berk Geveci berk.geveci at kitware.com
Thu Oct 10 11:21:26 EDT 2002

I don't think VTK discriminates objects depending
on their size/position (unless they are outside the clipping
range). I have run into a similar problem with older versions
of Mesa in the past. It is possible that the OpenGL library
distributed with Sun drops small objects when rendering. I
would recommend compiling Mesa 3.5 and using it instead of 
OpenGL to test whether this is the case.


On Thu, 2002-10-10 at 10:52, Eric Pichon wrote:
> Hi All,
> When trying to render many objects, VTK will discard those that are too
> small and too far (even though they are still much bigger than one pixel).
> I understand that this makes sense in many cases but it is a problem for
> what I want to do (basically rendering hundreds of small spheres) and I
> did not manage to get VTK to render all the actors regardless of any
> optimization consideration.
> I set manually the clipping planes of the camera and I am not using
> vtkLODactors but regular vtkActors.
> Your help would be greatly appreciated !
> Eric Pichon
> ---
> I am using VTK 4.0 on a Sun Ultra 80 (SunOS 5.7 sun4u sparc SUNW)
> It was compiled using gcc version 2.95.2.
> At startup VTK says :
> Using: /usr/openwin/platform/SUNW,Ultra-80/lib/GL/oglSUNWcore.so.4
> Using: /usr/openwin/platform/SUNW,Ultra-80/lib/GL/libvis.so.1
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