We've run into some strange problems in our code that I can't figure an
answer for. The simple requirement is to have multiple ViewPlatforms in
the scene graph and then swap between them on the fly by using
View.attachViewPlatform(). This is throwing a wobbly exception with
java.lang.NullPointerException:
at javax.media.j3d.View.deactivate(View.java:2036)
at javax.media.j3d.View.evaluateActive(View.java:1911)
at javax.media.j3d.View.attachViewPlatform(View.java:1596)
Now, one solution is that we just use a single ViewPlatform and change
the transform group that it is part of, but that can be a bad hack for
the application framework that we've constructed, so I'd like to find
the reason for this.
Usual info: JDK 1.2.2rc1, J3D 1.1.2
--
Justin Couch Author, Java Hacker
Snr Software Engineer [EMAIL PROTECTED]
ADI Ltd, Systems Group http://www.vlc.com.au/~justin/
Java3D FAQ: http://tintoy.ncsa.uiuc.edu/~srp/java3d/faq.html
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"Look through the lens, and the light breaks down into many lights.
Turn it or move it, and a new set of arrangements appears... is it
a single light or many lights, lights that one must know how to
distinguish, recognise and appreciate? Is it one light with many
frames or one frame for many lights?" -Subcomandante Marcos
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