MouseZoom behavior zooms the model by translating it along the view z-axis.
In perspective projection, this provides the sense of walking through the
model. However, by the very definition of parallel projection translating
the model along the view z-axis does nothing to provide the sense of
zooming. Yes the model will be translated, but visually nothing happens
until of course the model is translated to outside of the viewing volume
(and then it disappears).
An alternative method to zooming via translation, is to zoom by scaling the
model relative to the center of the viewing volume. This is not an ideal
solution, however if you require to view a model with parallel projection on
then it may be the only solution.
Joe
-----Original Message-----
From: R Vegan [mailto:[EMAIL PROTECTED]]
Sent: Monday, March 19, 2001 9:13 AM
To: [EMAIL PROTECTED]
Subject: [JAVA3D] Parallel Proj. and MouseZoom Beh.
Hi All
Is there any problem in using Parallel projection in tandem with
MouseZoom behavior. In my app, the zoom behavior freezes when
I use Parallel proj., but works fine with Perspective mode.
I tried changing the projection mode to parallel in one of
the official Java3D examples (bundled along with Java3D), and
I noticed very similar problems.
Anything else need to be adjusted with the View/ViewingPlatform
to get around this ? Thanks in advance
RV
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