Hallo Ian,
your application runs in that exception, because the pick branch group
contains at least one shape, which hasn't set the necessary capabilities. I
took a look at your code and found following:
MouseOverCityBehavior behavior = new MouseOverCityBehavior(canvas, objRoot,
new BoundingSphere(), box, cityName);
that means, objRoot is the pick branch and it contains the earth too. I
guess the earth object will cause the exception.
In respect to performance issues, the pick branch should contain as less
objects as possible. Therefore you can - for example - use the city group as
pick root. Furthermore i am wondering, why you insert a pick behavior for
each city. Perhaps it would be much more efficient to use only one behavior.
This (single) behavior can indicate a picked shape either by reference or
you can set the city name in the field 'userdata' of node.
Good luck!
Oliver
From: Ian Wojtowicz <[EMAIL PROTECTED]>
Reply-To: Discussion list for Java 3D API <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: [JAVA3D] Geometry-based Picking
Date: Sun, 29 Feb 2004 22:56:51 -0800
Hello everyone. I was hoping someone might be able to offer some advice
on a difficulty I am experiencing. I am currently trying to get
geometry-based picking to work in a Java3D 1.3 application, but I keep
running into the following exception:
javax.media.j3d.CapabilityNotSetException: Shape3D: no capability
to
allow intersect
This shouldn't be happening as I am setting the appropriate
capabilities in my geometries:
box.setCapability(Geometry.ALLOW_INTERSECT);
box.setCapability(Primitive.ENABLE_GEOMETRY_PICKING);
If anyone has managed to use geometry-based picking in a Java3D app
before, I'd love to hear from you. I've attached my source code, in
case you're interested.
Cheers.
Ian
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<< WorldViewer.java >>
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