Sebastian,
The (2,2) entry of the projection matrix involves the near/far plane
settings (e.g. -(f + n)/(f - n))
Perhaps if you issue the call...
camera-setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR
);
for the camera proj matrix you are manipulating, that might help prevent
your (2,2) value in the proj matrix from being overwritten.
-Shayne
-Original Message-
From: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Sven
Walther
Sent: Tuesday, November 22, 2011 1:08 PM
To: osg-users@lists.openscenegraph.org
Subject: [osg-users] Problem with manipulating the projection matrix
Hi everyone,
I am trying to figure out a problem with manipulating the
ProjectionMatrix in one of my views. There is no problem with setting
the Matrix itself. This works fine.
My problem occurs as I resume my current viewer. Changes of the
components like projectionMatrix(0,0) or projectionMatrix(1,1) are used
and are visualized correctly in the viewer. As I try to change the
component projectionMatrix(2,2), the value is overwritten somewhere and
I can't figure out where. Are some values out of range?
I am trying to implement something that is called reverse perspective.
Therefor I need to negotiate the correct component (2,2) in the
projection matrix.
Does anyone has an idea where the value is changed? What can I do about
it?
Thank you very much!
Cheers,
Sebastian
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=44001#44001
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