Unity shader学习之逐像素漫反射光照模型

Shader "Custom/Diffuse Fragment-Level"
{
Properties
{
_Diffuse ("Diffuse", Color) = (,,,)
} SubShader
{
Tags { "RenderType"="Opaque" }
LOD Pass
{
Tags { "LightMode"="ForwardBase" } // 只有设置了正确的LightMode，才能访问一些Unity提供的内置变量，如：_LightColor0 CGPROGRAM #pragma vertex vert
#pragma fragment frag #include "UnityCG.cginc"
#include "Lighting.cginc" struct appdata
{
float4 vertex : POSITION;
float3 normal : NORMAL;
}; struct v2f
{
float4 vertex : SV_POSITION;
float3 worldNormal : NORMAL;
}; float4 _Diffuse; v2f vert (appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
float3 wn = mul(v.normal, (float3x3)_World2Object);
o.worldNormal = normalize(wn);
return o;
} fixed4 frag (v2f i) : SV_Target
{
float3 lightDir = normalize(_WorldSpaceLightPos0);
float4 diffuseColor = _Diffuse * _LightColor0 * max(, dot(lightDir, i.worldNormal));
return UNITY_LIGHTMODEL_AMBIENT + diffuseColor;
} ENDCG
}
} Fallback "Diffuse"
}