[vtkusers] visualize a 3d matrix?

[Dominik Szczerba]

What you ask for should be doable with the image clases in VTK. I am
only not sure about transparency, but doubt it is un-doable.
As to postscript output have a look at GL2PS exporter, works very well
for me.
DS

David.Pont at ensisjv.com wrote:
> "TheSaint 555" <thesaint555 at hotmail.com> wrote on 15/12/2006 22:58:20:
> 
>> Im new to VTK and have a few questions before I start using it.
>>
>> I have an NxNxN matrix (N typically being 15-30). Each element is in the
>> range [0-3]. I would like to visualize the matrix as a collection of
> NxNxN
>> little cubes each colored only if the value is non zero (and be able to
>> rotate it with the mouse). I would like the zero-values elements to be
> fully
>> transparent. What is the easiest way to do this in VTK? Is there
> already a
>> class that implements this?
>>
>> I would like to also be able to slice the matrix arbitrarily along the
> axes
>> and view the intersection of the elements with the cross section plane.
>>
>> And is there an easy way to generate postscript of these image?
>>
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> 
> vtkLookupTable allows control of alpha. You can build a lookup table 'by
> hand' using SetNumberOfColors, SetTableValue-(one per color), Build. You
> would set alpha to 0 (transparent) for the appropriate scalar values and
> set to 1 for everything else, probably using RGB to show variation in
> scalars.
> 
>   Dave P
> 
> 
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