how can use Orthogonal camera?
camera to have a parallel projection instead of the default perspective projection: Camera::setParallelProjection.
how can set FlyByCamera support ParallelProjection zoom ?
The visual effect of zooming is done in a parallel projection by altering the distance between the side planes of the camera frustum - the bigger the distance between the planes, the farther zoomed out the image will appear.
See Camera::setFrustum() - I suggest using the
setFrustomLeft(), etc. methods rather than this one, as you probably don’t want to change the frustum near/far planes, just the side planes.
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