Geometry-based Picking

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Ian Wojtowicz - 24 Feb 2004 08:50 GMT

I am trying to get geometry-based picking to work in my code, but I
keep running into CapabilityNotSet exceptions:

Exception occurred during Behavior execution:
javax.media.j3d.CapabilityNotSetException: Shape3D: no capability to
allow intersect
    at javax.media.j3d.Shape3D.intersect(Shape3D.java:572)

I find this strange because I am in fact setting the ALLOW_INTERSECT
capability (along with anything else that I think might help):

        box.setCapability(Shape3D.ALLOW_GEOMETRY_READ);
        box.setCapability(Shape3D.ALLOW_GEOMETRY_WRITE);
        box.setCapability(Geometry.ALLOW_INTERSECT);
        box.setCapability(Primitive.ENABLE_GEOMETRY_PICKING);
        box.setCapability(Node.ALLOW_PICKABLE_READ);
        box.setCapability(Node.ALLOW_PICKABLE_WRITE);
        box.setCapability(Node.ENABLE_PICK_REPORTING);

Has anyone used geometry-based picking before? I'd love to see some
sample code. Bounds-based picking works, but the selection area is too
course to be useful.

Any ideas would be greatly appreciated.

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Christian Wiech - 26 Feb 2004 11:52 GMT

If you mean something like picking a
point from a geometry than have a
look at the Point Picker example at

http://www.j3d.org/utilities/index.html

It worked for me in my projects.

Cheers

Christian

Am Tue, 24 Feb 2004 00:50:06 -0800 schrieb Ian Wojtowicz:

> I am trying to get geometry-based picking to work in my code, but I
> keep running into CapabilityNotSet exceptions:
[quoted text clipped - 20 lines]
>
> Any ideas would be greatly appreciated.

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Geometry-based Picking

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