[vtkusers] volume rendering performance

[Mark Wyszomierski]

Hi Randall, Faith,

I gave vtkProjectedTetrahedraMapper a try for the first time today but I
experienced the longest render times with it out of any of the other
mappers. I'm wondering what your input data being rendered is? Mine is a
vtkImageData volume with dimensions of 256x256x56. The fixed point mapper or
3d texture mapper give me the fastest results.

Mark

On 2/6/06, Randall Hand <randall.hand at gmail.com> wrote:
>
> I think the best results will actually come from using the
> vtkProjectedTetrahedraMapper -
> http://www.vtk.org/doc/release/5.0/html/a01919.html
>
> I've pretty much tried them all.  The vtkVolumeRayCastMapper took about an
> hour to generate an image for me, the vtkFixedPointRayCastMapper cut it down
> to about 30 minutes.  The vtkProjectedTetrahedraMapper takes the cake,
> however, at a whopping 5 minutes.  Unfortunately, it does take alot more
> memory as it requires you to "tetrahedralize" your mesh.
>
> On 2/6/06, flin at enders.tch.harvard.edu <flin at enders.tch.harvard.edu >
> wrote:
> >
> > Hello all,
> >
> > I need some advice on how much imporvement the
> > vtkFixedPointVolumeRayCastMapper will make vs. regular
> > vtkVolumeRayCastMapper ?  I'm doing volume rendering of roughly
> > 250x80x150 voxels, and the speed is unacceptable.   Any suggestions on
> > how
> > to speed up?  Specifically, how to use hardware to accelerate it?
> >
> > Thanks.
> >
> > /faith
> >
> >
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>
>
> --
> Randall Hand
> Visualization Scientist,
> ERDC-MSRC Vicksburg, MS
> Homepage: http://www.yeraze.com
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