[vtkusers] using OpenGL acceleration for volume rendering

[Jorrit Schaap]

on a win32 platform it's the same.

look in the vtkGraphicsFactory, it says:

  if(strcmp(vtkclassname, "vtkVolumeTextureMapper2D") == 0)
      {
      return vtkOpenGLVolumeTextureMapper2D::New();
      }

this is called when you say vtkVolumeTextureMapper2D::New()

by the way, the Geforce is the fastest graphics card you can get at the moment for
volumerendering (using textures)

Jorrit




Jim Morash wrote:

> Hello,
> I've just tried using vtkVolumeTextureMapper2d and then
> vtkOpenGLVolumeTextureMapper2d to do some volume rendering, just to
> compare them; and I can't seem to see any difference in performance. The
> code is running on a Windows 2000 machine with a GeForce card in it that
> is supposed to do wonderful things with texture mapping, so I'm curious
> if either there is something I need to do for vtk to take advantage of
> hardware acceleration, or if the bottleneck in the rendering process is
> not the texture mapping but some other part of it which remains CPU
> intensive despite help from the GeForce card.
> thanks for your help.
> --Jim Morash
> jmorash at mit.edu
>
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