[vtkusers] vtkImageReader - SetDataSpacing - What is it doing?

[Sean Larkin]

Hello,

I'm using vtkImageReader to loading a 3D volume and render it with
vtkVolumeMapper.  I want to be able to adjust the voxel aspect ratio, so I
decided to use the SetDataSpacing() method of vtkImageReader.  Is this the
best way to do this?  I ask this because I can get very different looking
rendered images when I use the same aspect ratio, with different values.
For example, when I set the spacing to [.043,.043,1] I get poor resolution
compared to when I use [1,1,23.3] (these are the same ratios).    Does
anyone know why this is happening?

 

Thanks,

Sean Larkin

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