Hi Curtis-
Curtis Rueden wrote:
Hi everyone,
I put some code into VisBio a while ago to enable stereo displays for
Java3D displays. I just copied the logic from TestStereo that gets a
GraphicsConfiguration with stereo enabled, if one is available, and uses
it when constructing a new DisplayImplJ3D.
Recently a user told me that the stereo looks wrong on his machine, like
the image is way too close to the eye or something. I have no stereo
setup of my own to debug this, but I did browse around the Java3D FAQ a
little and found out that you're supposed to call
Canvas3D.setStereoEnable(true) somewhere in order to toggle stereo on
(http://java3d.j3d.org/faq/stereo.html). I noticed that nowhere in the
VisAD source code is this call made. So, is it actually necessary? Could
this be causing a problem like the user described? Anyone have
experience enabling stereo for VisAD/Java3D?
The thing we found was that the default eye separation was not
correct. In the IDV, we set the eye separation as follows:
protected void setEyePosition(double position) {
DisplayRendererJ3D rend
(DisplayRendererJ3D) getDisplay().getDisplayRenderer();
// From Dan Bramer
PhysicalBody myBody = rend.getView().getPhysicalBody();
myBody.setLeftEyePosition(new Point3d(-position, 0.0, 0.0));
// default is(-0.033, 0.0, 0.0)
myBody.setRightEyePosition(new Point3d(+position, 0.0, 0.0));
}
and by default, call it as:
setEyePosition(0.004);
Ideally, we should have a widget so the user can set it to whatever,
but this seems to work for most cases. Like you, not having a stereo
display makes it difficult to implement and test such things.
Don
*************************************************************
Don Murray UCAR Unidata Program
dmurray@xxxxxxxxxxxxxxxx P.O. Box 3000
(303) 497-8628 Boulder, CO 80307
http://www.unidata.ucar.edu/staff/donm
"Time makes everyone interesting, even YOU!"
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