Shader "OIT/MOIT/MOITSimpleTranspatent"
{
    Properties
    {
        _Color ("Color Tint", Color) = (1, 1, 1, 1)
        _MainTex ("Main Tex", 2D) = "white" {}

        [Enum(Off, 0, Front, 1, Back, 2)]
        _Cull("Cull", Float) = 2.0
    }
    SubShader
    {
        Tags
        {
            "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"
        }

        Pass
        {
            Name "GenerateMoments"
            Tags
            {
                "LightMode" = "GenerateMoments"
            }
            Blend One One
            ZWrite Off
            Cull[_Cull]

            HLSLPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma target 4.5

            #pragma multi_compile _MOMENT4 _MOMENT6 _MOMENT8
            #pragma multi_compile _ _TRIGONOMETRIC
            #pragma shader_feature _MOMENT_HALF_PRECISION _MOMENT_SINGLE_PRECISION

            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
            #if _MOMENT_HALF_PRECISION
            #include "Quantization.hlsl"
            #endif
            #include "WarpDepth.hlsl"
            #include "GenerateMoments.hlsl"

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

            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 vertex : SV_POSITION;
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;
            half4 _Color;

            v2f vert(appdata v)
            {
                v2f o;
                o.vertex = TransformObjectToHClip(v.vertex.xyz);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                return o;
            }

            MomentOutput frag(v2f i)
            {
                float4 col = tex2D(_MainTex, i.uv) * _Color;
                float positionCSZ = LinearEyeDepth(i.vertex.z, _ZBufferParams);
                return GenerateMoments(positionCSZ, 1 - col.a);
            }
            ENDHLSL
        }


        Pass
        {
            Name "ResolveMoments"
            Tags
            {
                "LightMode" = "ResolveMoments"
            }
            Blend One One
            ZWrite Off
            Cull[_Cull]

            HLSLPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma target 4.5

            #pragma multi_compile _MOMENT4 _MOMENT6 _MOMENT8
            #pragma multi_compile _ _TRIGONOMETRIC
            #pragma shader_feature _MOMENT_HALF_PRECISION _MOMENT_SINGLE_PRECISION

            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"

               
            SAMPLER(sampler_LinearClamp);
            #if _MOMENT_HALF_PRECISION
            #include "Quantization.hlsl"
            #endif
            #include "MomentMath.hlsl"
            #include "TrigonometricMomentMath.hlsl"
            #include "WarpDepth.hlsl"
            #include "ResolveMoments.hlsl"

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

            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 vertex : SV_POSITION;
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;
            half4 _Color;
         
            
            v2f vert(appdata v)
            {
                v2f o;
                o.vertex = TransformObjectToHClip(v.vertex.xyz);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                return o;
            }

            half4 frag(v2f i) : SV_Target
            {
                float4 col = tex2D(_MainTex, i.uv) * _Color;
                float positionCSZ = LinearEyeDepth(i.vertex.z, _ZBufferParams);
                float td, tt;
                _Overestimation = 0.25f;
                ResolveMoments(td, tt, positionCSZ, i.vertex.xy * _B0_TexelSize.xy);
                col.rgb *= col.a;
                return col * td;
            }
            ENDHLSL
        }
    }
}