渲染路径-surface shader 光照函数与渲染路径

最新推荐文章于 2021-10-05 09:44:39 发布

转载最新推荐文章于 2021-10-05 09:44:39 发布 · 171 阅读

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原文链接：http://www.cnblogs.com/nafio/p/9137191.html

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本文详细介绍了Unity中Surface Shader的光照模型声明，包括用于前向渲染路径和延迟光照路径的函数，如Lighting_Name()等，阐述了如何根据不同需求选择合适的光照模型。

https://docs.unity3d.com/Manual/SL-SurfaceShaderLighting.html

Lighting Model declaration

Lighting model is a couple of regular functions with names starting with Lighting. They can be declared anywhere in your shader file or one of included files. The functions are:

half4 Lighting<Name> (SurfaceOutput s, UnityGI gi); This is used inforward rendering path for light models that are not view direction dependent (e.g. diffuse).
half4 Lighting<Name> (SurfaceOutput s, half3 viewDir, UnityGI gi); This is used inforward rendering path for light models that are view direction dependent.
half4 Lighting<Name>_Deferred(SurfaceOutput s, UnityGI gi, out half4 outDiffuseOcclusion, out half4 outSpecSmoothness, out half4 outNormal); This isused in deferred lighting path.
half4 Lighting<Name>_PrePass (SurfaceOutput s, half4 light); This is used in light prepass (legacy deferred) lighting path.

Note that you don’t need to declare all functions. A lighting model either uses view direction or it does not. Similarly, if the lighting model only works in forward, do not declare the _Deferred or _Prepass function. This way, all Shaders that use it compile to forward rendering only.

转载于:https://www.cnblogs.com/nafio/p/9137191.html