Shader "Ares/SpecialEffect/TwoPassReflection"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
	}
	SubShader
	{
		Tags { "RenderType"="Opaque" "Queue"="Geometry" }
		//LOD 100

		Pass
		{
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			// make fog work
			#pragma multi_compile_fog
			
			#include "UnityCG.cginc"

			struct appdata
			{
				float4 vertex : POSITION;
				float2 uv : TEXCOORD0;
			};

			struct v2f
			{
				float2 uv : TEXCOORD0;
				UNITY_FOG_COORDS(1)
				float4 vertex : SV_POSITION;
			};

			sampler2D _MainTex;
			float4 _MainTex_ST;
			
			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.uv = TRANSFORM_TEX(v.uv, _MainTex);
				UNITY_TRANSFER_FOG(o,o.vertex);
				return o;
			}
			
			fixed4 frag (v2f i) : SV_Target
			{
				// sample the texture
				fixed4 col = tex2D(_MainTex, i.uv);
				// apply fog
				UNITY_APPLY_FOG(i.fogCoord, col);
				return float4(col.xyz,0);
			}
			ENDCG
		}

        Pass
        {
            /*
            Stencil {
                Ref 1          //0-255
                Comp Equal     //default:always
                Pass keep   //default:keep
                Fail keep      //default:keep
                ZFail keep     //default:keep
            }
            */
            Blend SrcAlpha  OneMinusSrcAlpha
            //ZTest Always
            Cull front
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            // make fog work
            #pragma multi_compile_fog
            
            #include "UnityCG.cginc"
            #include "../../Gonbest/Include/Utility/VertexUtilsCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
                float4 normal: NORMAL;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;               
                float4 vertex : SV_POSITION;
                float h:TEXCOORD1;
                UNITY_FOG_COORDS(2)
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;
            
            v2f vert (appdata v)
            {
                v2f o;              
                o.h = -v.vertex.x;
                v.vertex.x = Mirror(v.vertex,float3(1,0,0.0),float3(2.1,0,0.0));
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                UNITY_TRANSFER_FOG(o,o.vertex);
                
                return o;
            }
            
            fixed4 frag (v2f i) : SV_Target
            {
                // sample the texture
                fixed4 col = tex2D(_MainTex, i.uv);
                // apply fog
                UNITY_APPLY_FOG(i.fogCoord, col);
                col.a = saturate((0.5-i.h)/2);
                return col;
            }
            ENDCG
        }
	}
}