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  How to change the "field of view" when using the parallel projection ?  (Read 1381 times)
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Offline hadev

Junior Newbie

« Posted 2007-06-20 21:21:52 »

... well I know in this case it cannot be called a "field of view",  however:

When I set the parallel projection using PARALLEL_PROJECTION ); I would like to change the width and the height of the view box.

Basically, I would like to have the same result as when you move the camera back and forth using the perspective projection: when you move back, you see more of the scene, and when you move forward, things get bigger. But when using the parallel projection, the scene size doesn't change when you move the camera back and forth, and may suddenly disappear if you moved behind the 3d model.

I guess there must be some kind of setViewBoxSize( width, height ) method, but I have not found it, and got lost between the Views, Viewers, ViewingPlatforms and others...

Can someone help me with this?



Offline InteractiveMesh

Senior Newbie

« Reply #1 - Posted 2007-07-04 10:45:24 »


zooming a parallel projection could be done by scaling the scene. Call 'Transform3D.setScale(double scale)' to change the uniform scaling and update the ViewPlatform's TransformGroup. Give it a try.

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