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Unity contains several files that can be used by your shader programs to bring in predefined variables and helper functions. This is done by the standard #include directive, e.g.: Unity包含几个可被你的 着色器程序 使用的文件，它们带有预定义的变量和辅助函数。这通过标准 #include命令来使用，例如： CGPROGRAM // ... #include "UnityCG.cginc" // ... ENDCGShader include files in Unity are with .cginc extension, and the built-in ones are: 在Unity中Shader include文件的扩展名是.cginc，内置的文件如下： - HLSLSupport.cginc - (automatically included) Helper macros and definitions for cross-platform shader compilation.
HLSLSupport.cginc ：（自动包含）跨平台着色器编译帮助宏和定义 - UnityCG.cginc - commonly used global variables and helper functions.
UnityCG.cginc ：常用的全局变量和辅助函数 - AutoLight.cginc - lighting & shadowing functionality, e.g. surface shaders use this file internally.
AutoLight.cginc ：灯光和阴影功能，例如surface shaders 内在地使用此文件。 - Lighting.cginc - standard surface shader lighting models; automatically included when you're writing surface shaders.
Lighting.cginc ：标准surface shader 灯光模型，当你写表面着色器时自动包含。 - TerrainEngine.cginc - helper functions for Terrain & Vegetation shaders.
TerrainEngine.cginc ： 地形和植被着色器的辅助函数。
These files are found inside Unity application ({unity install path}/Data/CGIncludes/UnityCG.cginc on Windows,/Applications/Unity/Unity.app/Contents/CGIncludes/UnityCG.cginc on Mac), if you want to take a look at what exactly is done in any of the helper code. 这些文件存放在Unity程序中，在电脑上的具体位置是： Windows系统在{unity install path}/Data/CGIncludes/UnityCG.cginc Mac系统在 /Applications/Unity/Unity.app/Contents/CGIncludes/UnityCG.cginc 如果你想看一看里面的辅助代码究竟是什么，可以在这些位置找到具体文件。 HLSLSupport.cgincThis file is automatically included when compiling shaders. It mostly declares various preprocessor macros to aid in multi-platform shader development. 当编译着色器时这个文件会自动包括。它主要声明各种预处理宏来帮助多平台着色器开发。 UnityCG.cgincThis file is often included in Unity shaders to bring in many helper functions and definitions. 此文件经常包含在Unity着色器中，带来很多辅助函数和定义。 Data structures in UnityCG.cginc 在UnityCG.cginc中的数据结构- struct appdata_base: vertex shader input with position, normal, one texture coordinate.
struct appdata_base: 带有位置、法线和一个纹理坐标的顶点着色器输入 - struct appdata_tan: vertex shader input with position, normal, tangent, one texture coordinate.
struct appdata_tan：带有位置、法线、切线和一个纹理坐标的顶点着色器输入 - struct appdata_full: vertex shader input with position, normal, tangent, vertex color and two texture coordinates.
struct appdata_full：带有位置、法线、切线、顶点色和两个纹理坐标的顶点着色器输入 - struct appdata_img: vertex shader input with position and one texture coordinate.
struct appdata_img：带有位置和一个纹理坐标的顶点着色器输入
Generic helper functions in UnityCG.cginc 在UnityCG.cginc中的通用辅助函数- float3 WorldSpaceViewDir (float4 v) - returns world space direction (not normalized) from given object space vertex position towards the camera.
float3 WorldSpaceViewDir (float4 v)：根据给定的局部空间顶点位置到相机返回世界空间的方向（非规范化的） - float3 ObjSpaceViewDir (float4 v) - returns object space direction (not normalized) from given object space vertex position towards the camera.
float3 ObjSpaceViewDir (float4 v)：根据给定的局部空间顶点位置到相机返回局部空间的方向（非规范化的） - float2 ParallaxOffset (half h, half height, half3 viewDir) - calculates UV offset for parallax normal mapping.
float2 ParallaxOffset (half h, half height, half3 viewDir)：为视差法线贴图计算UV偏移 - fixed Luminance (fixed3 c) - converts color to luminance (grayscale).
fixed Luminance (fixed3 c)：将颜色转换为亮度（灰度） - fixed3 DecodeLightmap (fixed4 color) - decodes color from Unity lightmap (RGBM or dLDR depending on platform).
fixed3 DecodeLightmap (fixed4 color)：从Unity光照贴图解码颜色（基于平台为RGBM 或dLDR） - float4 EncodeFloatRGBA (float v) - encodes [0..1) range float into RGBA color, for storage in low precision render target.
float4 EncodeFloatRGBA (float v)：为储存低精度的渲染目标，编码[0..1)范围的浮点数到RGBA颜色。 - float DecodeFloatRGBA (float4 enc) - decodes RGBA color into a float.
float DecodeFloatRGBA (float4 enc)：解码RGBA颜色到float。 - Similarly, float2 EncodeFloatRG (float v) and float DecodeFloatRG (float2 enc) that use two color channels.
同样的，float2 EncodeFloatRG (float v) 和float DecodeFloatRG (float2 enc)使用的是两个颜色通道。 - float2 EncodeViewNormalStereo (float3 n) - encodes view space normal into two numbers in 0..1 range.
float2 EncodeViewNormalStereo (float3 n)：编码视图空间法线到在0到1范围的两个数。 - float3 DecodeViewNormalStereo (float4 enc4) - decodes view space normal from enc4.xy.
float3 DecodeViewNormalStereo (float4 enc4)：从enc4.xy解码视图空间法线
Forward rendering helper functions in UnityCG.cginc
UnityCG.cginc正向渲染辅助函数These functions are only useful when using forward rendering (ForwardBase or ForwardAdd pass types). 这些函数只有当使用forward rendering（ForwardBase 或 ForwardAdd通道类型）时才有效。 - float3 WorldSpaceLightDir (float4 v) - computes world space direction (not normalized) to light, given object space vertex position.
根据局部空间顶点位置计算世界空间灯光方向（非规范化的）。 - float3 ObjSpaceLightDir (float4 v) - computes object space direction (not normalized) to light, given object space vertex position.
根据局部空间顶点位置计算局部空间灯光方向（非规范化的）。 - float3 Shade4PointLights (...) - computes illumination from four point lights, with light data tightly packed into vectors. Forward rendering uses this to compute per-vertex lighting.
从4个点光源计算亮度，来将光照数据牢固的装入向量中。正向渲染使用此来计算逐顶点光照。
Vertex-lit helper functions in UnityCG.cginc
UnityCG.cginc中的顶点光照辅助函数These functions are only useful when using per-vertex lit shaders ("Vertex" pass type). 这些函数只在当使用逐顶点光照着色器（“顶点”通道类型）时才有效。 - float3 ShadeVertexLights (float4 vertex, float3 normal) - computes illumination from four per-vertex lights and ambient, given object space position & normal.
根据局部空间位置和法线，从4个逐顶点灯光和环境光计算亮度。
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发表于 2013-10-16 16:12:27
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