How can I get the actual distance to the scene using the depth texture?

[anon84944647]

I want to get the actual distance and not the depth, how can I do that?

(I think I basically want to do what bgolus(the one and only) did here, but the other way around and messure the distance to the camera)

Proper way to calculate world position ---> depth value

If I have access to the world position in a shader…what is the proper way to calculate its depth so that it can later be compared to the scene depth? Right now I am doing: depth = distance(worldPosition,_WorldSpaceCameraPos) / _ProjectionParams.z Is this correct? Doing this: LinearEyeDepth(depth,_ZBufferParams); Is not giving me the results I expect, so I am doing something wrong.

Thanks in advance!

[halley]

You can start by knowing the minimum possible value is at the camera’s near clipping plane, and the maximum is at the camera’s far clipping plane. You then account for the trigonometry in the reverse of the examples in that thread.

[anon84944647]

@halley1

You can start by knowing the minimum possible value is at the camera’s near clipping plane, and the maximum is at the camera’s far clipping plane. You then account for the trigonometry in the reverse of the examples in that thread.

Ok, thank you

[bgolus]

Search for “reconstructing world space from depth”.

[anon84944647]

@bgolus

Search for “reconstructing world space from depth”.

Sorry, I forgot to answer. I found some great resources that way. Thank you!