Heres an example:
A particle system might have a shape swarming and rotating around a
character, and you want to click on the character without hitting the shapes
forming the partical system. But in that case I want it to ignore the other
shapes, not throw an exception.
> ----------
> From: John Wright[SMTP:[EMAIL PROTECTED]]
> Reply To: Discussion list for Java 3D API
> Sent: Tuesday, January 16, 2001 11:29 AM
> To: [EMAIL PROTECTED]
> Subject: Re: [JAVA3D] PickTool GEOMETRY mode
>
> Lee,
>
> Certainly this should be documented better. It plagued me when I first
> started. As far as I figure it should have the capability turned on by
> default. As you mentioned having just one Shape3D without the
> capability set causes it to die an ugly death. I'm not sure I'd want it
> to ignore the exceptions because then we might be dealing with
> mysterious pick failures as it ignores the items we forgot to set the
> capability on.
>
> Can you tell me any reason you might NOT want the capability set? Why
> should it ever be off?
>
> - John
>
> "J. Lee Dixon" wrote:
> >
> > As a final note/request, I guess I can understand why the Geometry class
> > defaults to having the capability turned off. But it does seem a bit
> > redundant to have to set the capability for everything in the scene
> > since PickTool throws an exception and dies if it finds something that
> > does not have the capability set. I figured that if a Geometry did not
> > have the right bits set, it would just ignore that Geometry. Instead,
> > it dies and you can't even get to the Geometry that you DID enable the
> > bit on.
> >
> > I think this is a quick fix. PickTool should do a try/catch around
> > Shape3D.intersect(), and ignore the Shape3D on exception.
> >
> > Any thoughts??
> >
> > -Lee
> >
> > > -----Original Message-----
> > > From: J. Lee Dixon [mailto:[EMAIL PROTECTED]]
> > > Sent: Tuesday, January 16, 2001 10:24 AM
> > > To: [EMAIL PROTECTED]
> > > Subject: Re: [JAVA3D] PickTool GEOMETRY mode
> > >
> > >
> > > Okay, finally found it. It's in the Geometry class... the
> > > documentation
> > > was literal. Go figure.... ;)
> > >
> > > -Lee
> > >
> > > > -----Original Message-----
> > > > From: J. Lee Dixon [mailto:[EMAIL PROTECTED]]
> > > > Sent: Tuesday, January 16, 2001 9:37 AM
> > > > To: [EMAIL PROTECTED]
> > > > Subject: [JAVA3D] PickTool GEOMETRY mode
> > > >
> > > >
> > > > The JavaDoc for PickTool says:
> > > > PickTool.GEOMETRY will pick using the geometry of the
> > > pickable nodes.
> > > > The PickResult returned will contain the SceneGraphPath to
> > > the picked
> > > > Node. Geometry nodes in the scene must have the ALLOW_INTERSECT
> > > > capability set for this mode.
> > > > Well, I've looked at Shape3D, and there is no such thing as
> > > > ALLOW_INTERSECT. Am I looking in the wrong place? I have used the
> > > > PickTool.setCapabilities() function in my loader which creates the
> > > > Shape3Ds, but I still get the exception:
> > > >
> > > > javax.media.j3d.CapabilityNotSetException: Shape3D: no
> > > capability to
> > > > allow intersect
> > > >
> > > > whenever I try to select something. Also, I am using the Cylinder
> > > > class. What flag should I set in the constructor to allow
> > > > interesections??
> > > >
> > > > I was using the default BOUNDS selection, but this does not
> > > work well
> > > > with selectable objects that are very close together.
> > > >
> > > > -Lee
> > > >
> > > >
> > > > J. Lee Dixon
> > > > SAIC - Celebration, FL
> > > > 407-566-1438
> > > > [EMAIL PROTECTED] AOL: LeeOrlando
> > > >
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> >
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