glReadPixels is the function to use.
You
say the function is not giving you the correct depth values, in what way are
they not correct... the value in a depth buffer is between 0-1, where 0 is the
near clip and 1 if the far clip, not this is non linear and more precision is
given to values closer to the near clip plane
Steve
Baker has a nice page on this http://www.sjbaker.org/steve/omniv/love_your_z_buffer.html
Best Regards
Gordon
__________________________________________________________
Gordon
Tomlinson
Email
:
gordon.tomlinson @ overwatch.com
YIM/AIM
: Gordon3dBrit
MSN
IM
: Gordon3dBrit @
3dscenegraph.com
__________________________________________________________
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-----Original Message-----Hello all,
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of Aditi
Sent: Monday, July 03, 2006 10:31 AM
To: [email protected]
Subject: [osg-users] Problem Regarding glReadPixels
Can anyone tell me the osg counterpart for glReadPixels? In my application, i need to read back depthvalues from the framebuffer . I am currently using glReadPixels function but it is not giving the correct depth values. someone please lemme know how to read back depthvalues from framebuffer :-)
Thanks
Aditi
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