When does depth testing happen?

Posted by Utkarsh Sinha on Game Development See other posts from Game Development or by Utkarsh Sinha
Published on 2012-04-03T21:24:50Z Indexed on 2012/04/03 23:41 UTC
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XNA

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xna-4.0

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depth-buffer

I'm working with 2D sprites - and I want to do 3D style depth testing with them. When writing a pixel shader for them, I get access to the semantic DEPTH0. Would writing to this value help? It seems it doesn't. Maybe it's done before the pixel shader step? Or is depth testing only done when drawing 3D things (I'm using SpriteBatch)? Any links/articles/topics to read/search for would be appreciated.

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