// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'



Shader "TripleBrick/IvyBgPlane" {
    Properties {
        _MainTex ("MainTex", 2D) = "white" {}
    }
    SubShader {
        Tags {
            "IgnoreProjector"="True"
            "Queue"="Transparent"
            "RenderType"="Transparent"
        }
        GrabPass{ }
        Pass {
            Name "DEFERRED"
            Tags {
                "LightMode"="Deferred"
            }
            ZWrite Off
            
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #define UNITY_PASS_DEFERRED
            #include "UnityCG.cginc"
            #include "UnityPBSLighting.cginc"
            #include "UnityStandardBRDF.cginc"
            #pragma fragmentoption ARB_precision_hint_fastest
            #pragma multi_compile ___ UNITY_HDR_ON
            #pragma exclude_renderers gles3 metal d3d11_9x xbox360 xboxone ps3 ps4 psp2 
            #pragma target 3.0
            uniform sampler2D _GrabTexture;
            uniform sampler2D _MainTex; uniform float4 _MainTex_ST;
            struct VertexInput {
                float4 vertex : POSITION;
                float3 normal : NORMAL;
                float2 texcoord0 : TEXCOORD0;
            };
            struct VertexOutput {
                float4 pos : SV_POSITION;
                float2 uv0 : TEXCOORD0;
                float4 posWorld : TEXCOORD1;
                float3 normalDir : TEXCOORD2;
                float4 screenPos : TEXCOORD3;
            };
            VertexOutput vert (VertexInput v) {
                VertexOutput o = (VertexOutput)0;
                o.uv0 = v.texcoord0;
                o.normalDir = UnityObjectToWorldNormal(v.normal);
                o.posWorld = mul(unity_ObjectToWorld, v.vertex);
                o.pos = UnityObjectToClipPos(v.vertex );
                o.screenPos = o.pos;
                return o;
            }
            void frag(
                VertexOutput i,
                out half4 outDiffuse : SV_Target0,
                out half4 outSpecSmoothness : SV_Target1,
                out half4 outNormal : SV_Target2,
                out half4 outEmission : SV_Target3 )
            {
                #if UNITY_UV_STARTS_AT_TOP
                    float grabSign = -_ProjectionParams.x;
                #else
                    float grabSign = _ProjectionParams.x;
                #endif
                i.normalDir = normalize(i.normalDir);
                i.screenPos = float4( i.screenPos.xy / i.screenPos.w, 0, 0 );
                i.screenPos.y *= _ProjectionParams.x;
                float3 viewDirection = normalize(_WorldSpaceCameraPos.xyz - i.posWorld.xyz);
                float3 normalDirection = i.normalDir;
                float3 viewReflectDirection = reflect( -viewDirection, normalDirection );
                float2 sceneUVs = float2(1,grabSign)*i.screenPos.xy*0.5+0.5;
                float4 sceneColor = tex2D(_GrabTexture, sceneUVs);
////// Lighting:
////// Emissive:
                float4 _MainTex_var = tex2D(_MainTex,TRANSFORM_TEX(i.uv0, _MainTex));
                float3 emissive = (_MainTex_var.rgb*sceneColor.rgb);
                float3 finalColor = emissive;
                outDiffuse = half4( 0, 0, 0, 1 );
                outSpecSmoothness = half4(0,0,0,0);
                outNormal = half4( normalDirection * 0.5 + 0.5, 1 );
                outEmission = half4( (_MainTex_var.rgb*sceneColor.rgb), 1 );
                #ifndef UNITY_HDR_ON
                    outEmission.rgb = exp2(-outEmission.rgb);
                #endif
            }
            ENDCG
        }
        Pass {
            Name "FORWARD"
            Tags {
                "LightMode"="ForwardBase"
            }
            ZWrite Off
            
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #define UNITY_PASS_FORWARDBASE
            #include "UnityCG.cginc"
            #include "UnityPBSLighting.cginc"
            #include "UnityStandardBRDF.cginc"
            #pragma multi_compile_fwdbase
            #pragma exclude_renderers gles3 metal d3d11_9x xbox360 xboxone ps3 ps4 psp2 
            #pragma target 3.0
            uniform sampler2D _GrabTexture;
            uniform sampler2D _MainTex; uniform float4 _MainTex_ST;
            struct VertexInput {
                float4 vertex : POSITION;
                float3 normal : NORMAL;
                float2 texcoord0 : TEXCOORD0;
            };
            struct VertexOutput {
                float4 pos : SV_POSITION;
                float2 uv0 : TEXCOORD0;
                float4 posWorld : TEXCOORD1;
                float3 normalDir : TEXCOORD2;
                float4 screenPos : TEXCOORD3;
            };
            VertexOutput vert (VertexInput v) {
                VertexOutput o = (VertexOutput)0;
                o.uv0 = v.texcoord0;
                o.normalDir = UnityObjectToWorldNormal(v.normal);
                o.posWorld = mul(unity_ObjectToWorld, v.vertex);
                o.pos = UnityObjectToClipPos(v.vertex );
                o.screenPos = o.pos;
                return o;
            }
            float4 frag(VertexOutput i) : COLOR {
                #if UNITY_UV_STARTS_AT_TOP
                    float grabSign = -_ProjectionParams.x;
                #else
                    float grabSign = _ProjectionParams.x;
                #endif
                i.normalDir = normalize(i.normalDir);
                i.screenPos = float4( i.screenPos.xy / i.screenPos.w, 0, 0 );
                i.screenPos.y *= _ProjectionParams.x;
                float3 viewDirection = normalize(_WorldSpaceCameraPos.xyz - i.posWorld.xyz);
                float3 normalDirection = i.normalDir;
                float3 viewReflectDirection = reflect( -viewDirection, normalDirection );
                float2 sceneUVs = float2(1,grabSign)*i.screenPos.xy*0.5+0.5;
                float4 sceneColor = tex2D(_GrabTexture, sceneUVs);
////// Lighting:
////// Emissive:
                float4 _MainTex_var = tex2D(_MainTex,TRANSFORM_TEX(i.uv0, _MainTex));
                float3 emissive = (_MainTex_var.rgb*sceneColor.rgb);
                float3 finalColor = emissive;
                return fixed4(finalColor,1);
            }
            ENDCG
        }
    }
    
}