Re: [osg-users] Retrieving Z-Near & Far per-frame

Randall Hand Fri, 29 Mar 2013 07:18:16 -0700

Well, I want to do it "in" the frame.. Basically, I'm hoping to get OSG to do the scene traversal for culling, etc, then read the znear/zfar values to be sent elsewhere while the geometry is pushed down the pipe. I don't need perfectly accurate znear/far, just the bounding box estimates.

Trajce Nikolov NICK

March 24, 2013 4:05 PM

Hi Randal,

it is easy ..... somewhere in the loop, probably after the frame all you have to do is to get the projection matrix like

while (!viewer.done())
{
viewer.frame();

viewer.getCamera()->getProjectionMatrixAsFrustum(arguments .... )

--
trajce nikolov nick

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Randall Hand

March 23, 2013 10:41 PM

Is there (I'm sure there is) a way to retrieve the autocalculated ZNear & ZFar from the scene graph on a per-frame basis? I figure it's somewhere in a traversal structure, but I'm not exactly sure where or how to get to it.

Can someone enlighten me?

--
Randall Hand
www.yeraze.com

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Re: [osg-users] Retrieving Z-Near & Far per-frame

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