Paul Martz wrote:
(Posting this for about the 1000th time...)
Zooming merely changes the field of view without changing the view position.
Think of a photographer changing lenses on a camera without changing his
physical location. You change the projection matrix to change the field of
view, not the modelview matrix.
But that's *your* definition of zooming...
If you want to move the view position closer to a location, or further away
from a location, then you would change the modelview matrix (Camera view)
for that.
Which is what the OP asks about (he does not ask about the projection
matrix)
Regards,
Paul (#2)
See the OpenGL red book.
Paul Martz
Skew Matrix Software LLC
http://www.skew-matrix.com
+1 303 859 9466
-----Original Message-----
Subject: [osg-users] Performing zooming and other navigations on
geocentricvirtual earch?
Hi,
I have created geocentric(spherical) virtual earth and wanted to do navigate
around the earth using keyboard including zooming-in and out. As I m new
to OSG I want to understand dat could it be done by setting
viewmatrixAsLookAt of views' cameramanipulator? Plz get me some ideas how
it can be done???
...
Thank you.
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=9054#9054
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