Get World Position of Screen Coordinate Using Depth Buffer

Question

Using the depth buffer, how do I compute the world position of a screen coordinate (UV) in a fragment shader?

Answer 1

Answer by tanoshimi · Oct 23, 2016 at 07:44 PM

You don't need to do anything with the depth buffer to get world space position of a vertex - you can use the _Object2World macro:

 output.position_in_world_space = 
            mul(_Object2World, input.vertex);

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jjxtra · Oct 23, 2016 at 08:07 PM 0

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I want to get the world position of a screen coordinate using the depth buffer

tanoshimi jjxtra · Oct 23, 2016 at 08:11 PM 1

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jjxtra tanoshimi · Oct 23, 2016 at 08:13 PM 0

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Isn't that macro used to write to the depth buffer? I want to read from the depth buffer at a given screen position and calculate the world position.