Hi Chris and others,
finally I found a solution, which works for my application.
Basically I was thinking about the changes of Chris and my means to
calcultate clipping distances.
For rotating reasons my objects are located near (0,0,0) and I calculated
already the distance necessary to see the entire scene out od the
boundingbox of my world and the field of view.
Out of this distance I can calculate the front and back clipping plane
needed according to the current place of the viewing platform.
During zooming the viewing platform moves towards the object, thus I have
to reset my clipping planes. So I extented MouseZoom (instead of the
ViewerNavigationBehavior) and overloaded
transformChanged(). This method adjusts now the clipping planes every time
the user zoomes in.
An important remark for me was a mail from Doug Gehringer in 1998
(Aug. 18th)
"If you are concerned with intersections near the back of your viewing
volume, r=3000 might be too high. If your intersections are close to the
front clip plane a higher value may allow you to view objects closer to
the eye.
I typically set the near clip plane as far back as practical and then set
the far clip plane distance times 3000."
Another helpful thing was:
http://www.starfireresearch.com/services/java3d/supplementalDocumentation.html
Thanks Chris, Doug, John and Justin
Desiree
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Desiree Hilbring
Institut fuer Photogrammetrie und Fernerkundung
Universitaet Karlsruhe, Germany
email: [EMAIL PROTECTED]
# 0721 6083676
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