[vtkusers] vtkVolumeRayCastMapper bug? in hardware stereo

[Nicholas Schwarz]

Hi,

If you are only using ray casting you can attempt to "correct" the swapped
eyes by setting the camera's eye angle to a negative number like this 

'ren -> GetActiveCamera() -> SetEyeAngle(-2.0);'

where 'ren' is of type vtkRenderer*. This will only work if you are using
VTK's flawed ray casting methods. If you try to intermix a ray casted
image with polygonal objects (or anything else in VTK that properly
generates stereo pairs) and have a negative eye angle the stereo pairs for
the polygonal objects (or the correctly generated paris) will be reversed.

-------------------------------------------------------------------------
Nicholas Schwarz
Electronic Visualization Laboratory           E-Mail: schwarz at evl.uic.edu
Department of Computer Science                Telephone: 312-996-3002
University of Illinois at Chicago             Facsimile: 312-413-7585
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> Message: 8
> Date: Thu, 21 Aug 2003 10:53:14 +0300
> From: "Dr. Daniel James White PhD" <dan at chalkie.org.uk>
> To: vtkusers at vtk.org
> Subject: [vtkusers] Re: vtkVolumeRayCastMapper bug? in hardware stereo
> 
> Dear vtkVolumeRayCastMapper people,
> 
> It looks like several people are experiencing a bug in
> vtkVolumeRayCastMapper
> or a related class which is causing hardware stereo L and R images to =20=
> 
> be swapped, see below.
> 
> my machine setup is described below (2nd message)
> 
> Is it possible to fix this, as it would be reall nice if my VTK =20
> applications had working hardware stereo!
> 
> cheers
> 
> Dan