[vtkusers] Zbuffer problem with matrox g550

[Simon Chatelain]

Hello,

I am working with Java and VTK, on a linux redhat 8 system.

I want to display three slices of a volume in 3D. For that, I use a 
reslicer to extract the slice, and then i use this slice as a texture 
for a plan.
And then i use the vtkPanel class to display all the stuff. Easy to do, 
and work well with my machine.

But i recently try my application on another machine, with a matrox G550 
graphic card with the matrox driver for linux (my machine has an NVidia 
with the nvidia driver for linux), and the display of my stuff is 
totally wrong.

The normal display is the one of the picture "correct.jpeg". The three 
plans are orthogonal, and we can see the intersection.
The wrong display is the one of the picture "wrong.jpeg". The coronal 
plan, instead of cross the sagital, is displayed in front of the other 
plans.


My question is : is it a bug in the graphic card driver , is it a bug in 
vtk orr is it a bug in my application ?
                            does someone have the same problem ?

Thanks for your help.

Simon Chatelain
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