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



Shader "TripleBrick/DecalBlend" {
    Properties {
        _MainTex ("MainTex", 2D) = "white" {}
        _Strength ("Strength", Range(0, 2)) = 0.7
        _DarkBrightBalance ("Dark Bright Balance", Range(0.3, 2)) = 0.3
        [HideInInspector]_Cutoff ("Alpha cutoff", Range(0,1)) = 0.5
    }
    SubShader {
        Tags {
            "IgnoreProjector"="True"
            "Queue"="Transparent"
            "RenderType"="Transparent"
        }
        GrabPass{ }
        Pass {
            Name "FORWARD"
            Tags {
                "LightMode"="ForwardBase"
            }
            Blend SrcAlpha OneMinusSrcAlpha
            ZWrite Off
            
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #define UNITY_PASS_FORWARDBASE
            #include "UnityCG.cginc"
            #pragma multi_compile_fwdbase
            #pragma multi_compile_fog
            #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;
            uniform float _Strength;
            uniform float _DarkBrightBalance;
            struct VertexInput {
                float4 vertex : POSITION;
                float2 texcoord0 : TEXCOORD0;
            };
            struct VertexOutput {
                float4 pos : SV_POSITION;
                float2 uv0 : TEXCOORD0;
                float4 screenPos : TEXCOORD1;
                UNITY_FOG_COORDS(2)
            };
            VertexOutput vert (VertexInput v) {
                VertexOutput o = (VertexOutput)0;
                o.uv0 = v.texcoord0;
                o.pos = UnityObjectToClipPos(v.vertex );
                UNITY_TRANSFER_FOG(o,o.pos);
                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.screenPos = float4( i.screenPos.xy / i.screenPos.w, 0, 0 );
                i.screenPos.y *= _ProjectionParams.x;
                float2 sceneUVs = float2(1,grabSign)*i.screenPos.xy*0.5+0.5;
                float4 sceneColor = tex2D(_GrabTexture, sceneUVs);
////// Lighting:
////// Emissive:
                float4 node_8077 = sceneColor;
                float4 _MainTex_var = tex2D(_MainTex,TRANSFORM_TEX(i.uv0, _MainTex));
                float3 node_925 = (_MainTex_var.rgb*1.0);
                float node_7948 = 2.0;
                float3 emissive = clamp((_DarkBrightBalance*lerp((1.0 - (((1.0 - node_8077.rgb)*(1.0 - node_925))*node_7948)),((node_925*node_8077.rgb)*node_7948),round(node_925))),0,1);
                float3 finalColor = emissive;
                fixed4 finalRGBA = fixed4(finalColor,pow((_MainTex_var.a*_Strength),(3.0-_Strength)));
                UNITY_APPLY_FOG(i.fogCoord, finalRGBA);
                return finalRGBA;
            }
            ENDCG
        }
    }
   
}