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Question by Rogatien · Oct 04, 2017 at 02:21 PM · shader programming

Where to find proper documentation for shaders?

I have recently been trying to teach myself some shader programming (mostly to code some nifty VFX) and while the Internet and the official docs are very useful for all the broad subjects, I struggle to find precise documentation on the finer details.

For example, what is the range of the return value of the function UnityObjectToViewPos(float4)? Is it in pixels? In percentage, from 0 to 1? What about tex2D()?

Skimming through the builtin shaders, I also see a lot of functions that are specific to Unity, although I cannot seem to find any doc explaining them (e.g. UNITY_INITIALIZE_OUTPUT(Input, o)).

Does anyone have any idea where a proper documentation could be found? I have no clue as to where to start.

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