Shader "Unlit URP Shader/OutLine2"
{
    Properties
    {
        //_MainTex("MainTex",2d)="white"{}
        //_OutLineColor("OutLineColor",color)=(1,1,1,1)
        //_OutLineWide("OutLineWide",float)=1
    }
 HLSLINCLUDE

     
    #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl"
    #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
    #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
    #include "Packages/com.unity.render-pipelines.core/Runtime/Utilities/Blit.hlsl"

     CBUFFER_START(UnityPerMaterial)
    half4 _OutLineColor;
    half _OutLineWide;
    CBUFFER_END
    float Scale;
    TEXTURE2D(_Temp);//SAMPLER(sampler_Temp);
    TEXTURE2D(_Cut);SAMPLER(sampler_Cut);
    //TEXTURE2D(_MainTex);SAMPLER(sampler_MainTex);
    //SAMPLER(sampler_BlitTexture);
    float4 _BlitTexture_TexelSize;
    TEXTURE2D(_OutLineTex);SAMPLER(sampler_OutLineTex);
    float Strength;
    float2 HoV;
    struct Attributes2
    {
        float4 vertex : POSITION;
        float3 normal : NORMAL;
        //float3 smoothNormal : TEXCOORD3;
        float2 uv : TEXCOORD0;
    };
    
    struct Varyings2
    {
        float4 position : SV_POSITION;
        float4 color : COLOR;
        float2 uv : TEXCOORD0;
    };
    //圆形模糊
    float4 Bur(float2 uv)
    {
        float2 d=_BlitTexture_TexelSize.xy*Scale;
        half4 col=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+float2(0,1)*d);
        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+float2(-1,0)*d);
        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+float2(0,-1)*d);
        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+float2(1,0)*d);

        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+float2(-1,1)*d)*0.5;
        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+float2(1,-1)*d)*0.5;
        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+float2(-1,-1)*d)*0.5;
        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+float2(1,1)*d)*0.5;
        return col*0.1666;
    }
    
    float4 BurHoV(float2 uv)
    {
        float2 d=_BlitTexture_TexelSize.xy*Scale*HoV;
        half4 col=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv)*0.4;
        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+1*d)*0.15;
        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+-1*d)*0.15;
        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+2*d)*0.10;

        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+-2*d)*0.10;
        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+3*d)*0.05;
        col+=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,uv+-3*d)*0.05;

        return col;
    }
    
   
    float Remap(float x, float t1, float t2, float s1, float s2)
    {
        return (s2 - s1) / (t2 - t1) * (x - t1) + s1;
        
    }
    float3 ACESToneMapping(float3 color, float adapted_lum)
    {
        const float A = 2.51f;
        const float B = 0.03f;
        const float C = 2.43f;
        const float D = 0.59f;
        const float E = 0.14f;
        color *= adapted_lum;
        return (color * (A * color + B)) / (color * (C * color + D) + E);
    }
     Varyings2 vert(Attributes2 v)
    {
        Varyings2 o = (Varyings2)0;
        o.position = TransformObjectToHClip(v.vertex);
        o.uv=v.uv;
        o.color = _OutLineColor;
        return o;
    }
    float4 _HeightLightColor;
    //填充颜色
    float4 fragFill(Varyings2 i) : SV_Target
    {
        return _OutLineColor;
    }
    //降采样模糊
    float4 fragDownBlur(Varyings i) : SV_Target
    {
        float4 col=Bur(i.texcoord);
        
        return col;
    }
    //升采样模糊
    half4 fragUpBlur(Varyings i) : SV_Target
    {
        float4 col=Bur(i.texcoord);
        float4 tempColor=SAMPLE_TEXTURE2D(_Temp,sampler_LinearClamp,i.texcoord);
        col.rgb=col.rgb+tempColor.rgb;
        return col;
    }
    //高斯模糊
    float4 fragHoV(Varyings i) : SV_Target
    {
        float4 col=BurHoV(i.texcoord);
        return col;
    }
    //模板剔除
    float4 fragCull(Varyings2 i) : SV_Target
    {
        //float4 mainColor=SAMPLE_TEXTURE2D(_MainTex,sampler_MainTex,i.texcoord);
        //float4 mainColorC=SAMPLE_TEXTURE2D(_Cut,sampler_Cut,i.texcoord);
       // mainColorC.rgb=ACESToneMapping(mainColorC.rgb,0.4);
        return float4(0,0,0,0);
    }
     //模板剔除2
    float4 fragCull2(Varyings i) : SV_Target
    {
        return float4(0,1,0,0);
    }
    //混合颜色
    float4 fragBlend(Varyings i) : SV_Target
    {
        float4 mainColor=SAMPLE_TEXTURE2D(_BlitTexture,sampler_LinearClamp,i.texcoord);
        mainColor.rgb*=Strength;
        //mainColor.rgb=ACESToneMapping(mainColor.rgb,0.6);
        return mainColor;
    }
 ENDHLSL
    SubShader
    {
        Tags { "Queue"="Transparent"  "RenderPipeline" = "UniversalPipeline" }
        LOD 100
        
        ZWrite Off
        ZTest Always
        Cull Off
        Lighting Off
        Pass
        {
            Name "0_Fill"
            Stencil
            {
                Ref 3
                Comp Always
                Pass Replace
                Fail Keep
            }
            //ZWrite On
            HLSLPROGRAM
            #pragma vertex vert
            #pragma fragment fragFill
            ENDHLSL
        }
        Pass
        {
            Name "1_DownBlur"
            HLSLPROGRAM
            #pragma vertex Vert
            #pragma fragment fragDownBlur
            ENDHLSL
        }
        Pass
        {
            Name "2_UpBlur"
            HLSLPROGRAM
            #pragma vertex Vert
            #pragma fragment fragUpBlur
            ENDHLSL
        }
        Pass
        {
            Name "3_Cut"
            Stencil
            {
                Ref 2
                Comp Equal
                Pass Keep
                Fail Keep
            }
            //ColorMask 0
            //BlendOp RevSub
            HLSLPROGRAM
            #pragma vertex Vert
            #pragma fragment fragCull
            ENDHLSL
        }
        Pass
        {
            Name "4_Blend"
            Blend One One
            HLSLPROGRAM
            #pragma vertex Vert
            #pragma fragment fragBlend
            ENDHLSL
        }
        Pass
        {
            Name "5_Cut"
            Stencil
            {
                Ref 2
                Comp Equal
                Pass Keep
                ZFail Keep
            }
            //BlendOp RevSub
            HLSLPROGRAM
            #pragma vertex Vert
            #pragma fragment fragCull2
            ENDHLSL
        }
        

    }
}