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View Full Version : depth buffer linear or something else



Gessos Paul
12-08-2009, 04:29 PM
I plan to use OpenGL to create gray bitmap height maps to drive my CNC machine.

I will use glOrtho() and depth buffer with float elements.

But I want the depth values change linear between near and far plane. Is there a guarantee about this?

After a little research I found that maybe the depth value change logarithmic and not linear.

Is there a specific (and standard) formula to convert z to depth value, OR z IS the depth value?

Special thanks