[vtkusers] RE render tens of thousands of spheres in VTK

[Stephane PLOIX]

Hi zhigao,

You can try to use the point sprite representation.
All the code is distributed with ParaView-3.6.1, but I recommend using the 
cvs version as some bugs have been fixed.
The code should compile outside ParaView, simply run cmake with source 
path pointing to the Plugins\PointSprite subdirectory.

For an example on how to use it directly from VTK, you can look at the 
Plugins\PointSprite\Examples\Rendering\Cxx\PointSpriteDemo.cxx file.

Performance tip : disable depth peeling, which usually takes much longer 
that traditionnal alpha blending with point sprites because you have too 
many layers to draw.

Stephane

-----------------------------------------------------------------------------
Stéphane Ploix
EDF R&D 
1 avenue du Général de Gaulle
F-92141 Clamart Cedex
Phone : +33 (0)1 47 65 51 10
Email : stephane.ploix 'at' edf.fr



ZGCHENG at ntu.edu.sg 
Envoyé par : vtkusers-bounces at vtk.org
01/09/2009 14:46

A
vtkusers at vtk.org
cc

Objet
[vtkusers] render tens of thousands of spheres in VTK






Hi,

I have a time series data.  I display the data using tens of thousands of 
boxes. For each time step, i changed the top 4 points' height for each box 
to make an animation. But this results in slow interactive responses 
because It takes a long time to render the points set, around 1 seconds. 
plus the new points computation time. For example, hen you rotate the 3D 
prop, it takes 1 to 2 seconds to responses.

Is there anyway or any filter thing that can help me to reduce the 
rendering time?

Regards,
zhigao
_______________________________________________
Powered by www.kitware.com

Visit other Kitware open-source projects at 
http://www.kitware.com/opensource/opensource.html

Please keep messages on-topic and check the VTK FAQ at: 
http://www.vtk.org/Wiki/VTK_FAQ

Follow this link to subscribe/unsubscribe:
http://www.vtk.org/mailman/listinfo/vtkusers

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20090901/43e00fde/attachment.htm>