Canvas3d has methods for doing this.
Try something like the following:
Canvas3d c;
c.getPixelLocationInImagePlate(x, y, position);
c.getImagePlateToVworld(t);
t.transform(position);
position will end up containing the 3-d world co-ordinates
of a point on the canvas (you got the x, y values from
a mouse event).
Note that there is a whole line of points in the virtual world
that map to that same point on the Canvas3d.
If instead you want to select an object in the virtual world
given a mouse location on the Canvas3D you should use
a PickCanvas
Hope this is helpful.
Robert
--
Robert McLaughlin
Medical Vision Lab
Department of Engineering Science
University of Oxford
Parks Road Oxford OX1 3PJ
England
On Wed, 3 May 2000, JayT wrote:
> Hi
> I would like to go through the Canvas3D scene and along the way display the world
>and the local coordinates. There are methods in Canvas3D (getVworldToImagePlate()
>and getImagePlateToVworld() ) and Node (getLocalToVworld() ) but those all need a
>TransformGroup.. what if it's just the mouse moving? I realize I can place a
>java.awt.MouseListener and implement it in a Canvas3D but is there a way in Java3D
>that would allow me to get a reference point under the mouse pointer?
>
> Jay
>
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