[vtkusers] VTK 5.6.0 vtkGPUVolumeRayCastMapper very slow?
wsales at gmail.com
Mon May 10 15:14:51 EDT 2010
Since vtkGPUVolumeRayCastMapper comes from VTKEdge, you can follow the
2010/5/10 Elvis Chen <elvis.chen at gmail.com>
> I've just compiled VTK 5.6.0 and was testing vtkGPUVolumeRayCastMapper
> using the GPURenderDemo.cxx. Using a CT volume available to me
> (512x512x481, short), I found the rendering to be VERY slow: it is
> non-interactive at all. If I use a mouse to change the camera position, I
> basically have to wait about 5-8 seconds for the rendering to complete.
> I'm using:
> Windows-7, 64bit
> Intel i7-860 (4 core at 2.80GHz)
> 4GB RAM
> Nvidia GTX260 with 196.21 driver, 896MB of video RAM
> Visual Studio Express 2008
> VTK 5.6.0 was compiled with all the standard options, except with python
> binding (ON).
> My questions are:
> 1) is there a way to display the frame rate to quantify the rendering
> 2) the CT volume is about 240MB, which should fit inside the video RAM.
> Has anyone else notice the slow speed? Should I expect
> vtkGPUVolumeRayCastmapper to be faster (or slower) than
> Once I know how to do 1) I'll write a small program to test the speed
> difference between
> any insight is very much appreciated,
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