Reading from the Depth Buffer
Post: #1
Hi,
I'm wonding if there's a fast (or any) way to read the value of the depth buffer in openGL?
Thanks!
I'm wonding if there's a fast (or any) way to read the value of the depth buffer in openGL?
Thanks!
Post: #2
glReadPixels can do it, but it definitely isn't going to be fast. See the glReadPixels man page to find out how.
- Alex Diener
- Alex Diener
Post: #3
In combination with the ARB_pixel_buffer_object extension, ReadPixels can be "fast" -- not quick to execute, but asynchronous so you don't have to wait for it like you do without ARB_pbo.
Unfortunately, ARB_pbo isn't available on Mac OS X yet
Unfortunately, ARB_pbo isn't available on Mac OS X yet
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