[osg-users] A question about zooming with orthographic projection

[Ke Li]

Dear all,
 
In the following post, Robert said that orthographic projection should be avoided.
 
http://thread.gmane.org/gmane.comp.graphics.openscenegraph.user/7660/focus=7664
 
But I know that some OpenGL applications do use orthographic projection with zooming functionality. So I'm a little confused.
 
Can any one give me some enlightenment?
 
Thanks!
 
Ke Li
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