[vtkusers] Volume rendering algorithms?

[Lisa Sobierajski Avila]

Hello Jim,

These volume mappers are available:

vtkVolumeRayCastMapper - a software ray casting approach. Slow, but accurate.

vtkVolumeTextureMapper2D - a 2D texture mapping approach. Can be reasonably 
fast if you have good 2D texture mapping support. Less accurate than ray 
casting, especially for low-depth frame buffers.

vtkVolumeProMapper - if you happen to have a VolumePro volume rendering 
board by RTViz, then this mapper will make use of that hardware. Very fast.

If you want to add your own you would need to create a new subclass of 
vtkVolumeMapper. You can follow the ray casting API, render directly into 
the graphics context, or you can provide an image back to the renderer. If 
you are providing an image back, you are responsible for asking the 
renderer for the current RGB and Z buffers and merging your results in.


Lisa


At 01:49 PM 6/15/00, Jim Morash wrote:

>Hi all,
>I'm just getting started with VTK and I may be using it for a medical
>visualization application. Could anyone tell me what the included
>options are for volume rendering algorithms, and give me some idea of
>how hard it would be to add them if I want to try something that's not
>included?
>thanks,
>--Jim Morash
>
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