Well, the J3DGraphics2D can be used for exactly what you are talking
about, though my experience is that is really brings down the
performance of the renderer, and you have to keep the renderer going
since the user is dragging his mouse to create his ROI rectangle.
Here are a couple ideas:
If there are no animations or behaviors that you care to have running
while the selection is ocurring, you could: 1) take a snapshot of the
scene, 2) stop the renderer, 3) draw the snapshot and the rectangle as
the user draws it over the snapshot, 4) when the selection is done, turn
the renderer back on
Another idea is to draw the ROI rectangle IN the 3D scene, so the
rectangle will be redrawn as the user drags the mouse.
-Lee
-----Original Message-----
From: Karsten Fries [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 07, 2000 10:52 AM
To: [EMAIL PROTECTED]
Subject: [JAVA3D] 2d graphics in Canvas3D
Hi there,
i am supposed to do a 2d selection (spawning a rectangle) to define a
region
of interest for zooming purpose. So i wonder, if there is a possibility
to draw
into the canvas3d component without the whole scene being rendered while
the user
defines the roi.
I saw there is a class named J3DGrpahics2D. Can i use this. A short look
at it was
not encouraging at all.
Any suggestion are welcome
Best regards
Karsten
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