Ditto Robert's post. The OpenSceneGraph Quick Start Guide has a good
recommended reading list towards the front of the book, which you should
find helpful.
In the meantime, consider the following two different projection matrices:
A. ...AsPerspective( 20., aspect, near, far );
B. ...AsPerspective( 40., aspect, near, far );
A has a 20 degree field of view, B has a 40 degree field of view. A is
said to be "zoomed in" compared to B. So this might be what you're
after, but really your post is to vague to say for sure whether or not
this is what you need.
Paul Martz
Skew Matrix Software LLC
_http://www.skew-matrix.com_ <http://www.skew-matrix.com/>
+1 303 859 9466
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