Hm, maybe it's this:
Transform3D xform = new Transform3D();
Node.getLocalToVworld(xform);
Node.getBounds().transform(xform)
I love answering my own questions. ;)
-Lee
> -----Original Message-----
> From: J. Lee Dixon [mailto:[EMAIL PROTECTED]]
> Sent: Monday, March 05, 2001 11:13 AM
> To: [EMAIL PROTECTED]
> Subject: [JAVA3D] Node.getBounds
>
>
> I am playing with Node.getBounds() (for doing run-time transparency
> ordering), and was expecting a different behavior out of the
> getBounds()
> call. For example, if I make a 2x2x2 cube, I expect a bounding box to
> be (-1,-1,-1) to (1,1,1). But then if I put a TransformGroup
> above the
> shape with a translation transform of (50, 75, 0), I would
> expect the TG
> to have the same size bounds, except translated. This is not what I
> get.
>
> Looking at the below output and code, can someone (at Sun?)
> help me with
> this? It looks like it's the bounds of the child, not the
> node itself.
> I understand the change from bounding box to bounding sphere, but not
> why the TG bounds are located at 0,0,0.
>
> BTW, how would (could) culling operations work successfully with this?
> I don't think this is right at all... ;)
>
> The output
> ---------------------------------------------------------
> COLOR CUBE: bounds=Bounding box: Lower=-1.0 -1.0 -1.0
> Upper=1.0 1.0 1.0
> COLOR CUBE XFORM: bounds=Center=(0.0, 0.0, 0.0)
> Radius=1.7320508075688772
> GROUP: bounds=Center=(50.0, 75.0, 0.0) Radius=1.7320508075688772
>
> The code
> ----------------------------------------------------------
> // The color cube (2x2x2) centered at 0,0,0
> Shape3D s = new com.sun.j3d.utils.geometry.ColorCube();
> System.out.println("COLOR CUBE: bounds=" + s.getBounds() );
>
> // A transform to move the cube to 50,75
> Transform3D sxform = new Transform3D();
> sxform.setTranslation(new Vector3f(50f, 75f, 0f));
> TransformGroup sgrp = new TransformGroup( sxform );
> sgrp.addChild( s );
> System.out.println("COLOR CUBE XFORM: bounds=" + sgrp.getBounds() );
>
> // Put the TG in a group (shouldn't have to do this)
> Group g2 = new Group();
> g2.addChild( sgrp );
> System.out.println("GROUP: bounds=" + g2.getBounds() );
>
>
> J. Lee Dixon
> SAIC - Celebration, FL
> 321-939-7917
> [EMAIL PROTECTED] AOL: LeeOrlando
>
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