//1、一个是模拟入射光，在模型上观察入射光角度对光照效果的影响； Shader"Custom/简单模拟光照" { Properties { _Color ("Light Color", Color) = (1, 1, 1, 1) _Dir ("Light Dir", Vector) = (0, 0, 1, 0) _Intensity("Instensity", float) = 1.0 } SubShader { Tags {"RenderType"="Opaque"} LOD 100 Pass { CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc"
struct v2f
{
float4 vertex : POSITION;
float3 normal : NORMAL;
};
fixed4 _Color;
fixed4 _Dir;
float _Intensity;
v2f vert(appdata_base v)
{
v2f o;
o.vertex =UnityObjectToClipPos(v.vertex);
o.normal = v.normal;
return o;
}
fixed4 frag(v2f v) : COLOR
{
fixed3 dir = (_Dir).xyz;
dir = normalize(dir);
fixed3 nrm = normalize(v.normal);
float bis = dot(dir, nrm);
if(bis <= 0)
{
bis = 0;
}
fixed4 col = _Color * bis * _Intensity;
return col;
}
ENDCG
}
}
}