SimpleReflection

【SimpleReflection】

　　取法线的x、y作为reflection-map的uv。

Shader "Custom/SimpleReflection"
{
    Properties
    {
        _MainTex ("Base (RGB)", 2D) = "White" {}
        _ReflectionMap ("ReflectionMap", 2D) = "White" {}
    }

   SubShader
   {
          Lod 100
          Tags { "Queue" = "Transparent"}
        Pass
        {
            Blend SrcAlpha OneMinusSrcAlpha
            CGPROGRAM 

            #pragma vertex Vert
            #pragma fragment Frag
            #include "UnityCG.cginc" 

            sampler2D _MainTex;
            sampler2D _ReflectionMap;

            struct V2F
            {
                fixed4 pos:SV_POSITION;
                fixed2 uv:TEXCOORD0;
                fixed2 uv2:TEXCOORD1;
            }; 

            V2F Vert(appdata_full v)
            {
                V2F output;
                output.pos = mul (UNITY_MATRIX_MVP, v.vertex);
                output.uv = v.texcoord;
                output.uv2 = mul(UNITY_MATRIX_IT_MV, float4(v.normal, 0)).xy/2+0.5;
                return output;
            }

            half4 Frag(V2F i):COLOR
            {
                return tex2D(_MainTex,i.uv) + tex2D(_ReflectionMap,i.uv2);
            }

            ENDCG
        }
   } 

    FallBack "VertexLit"
}