Shader "SGame/Particles/AlphaBlend_DepthCap" 
{
	Properties 
	{
		[Enum(Off, 0, On, 1)] _ZWrite("深度写入", Float) = 0
		[Enum(Off, 0, On, 2)] _ZTest ("深度测试", Float) = 2
		_TintColor ("颜色", Color) = (0.5,0.5,0.5,0.5)
		_MainTex ("基础贴图(RGB: 颜色，A: Alpha)", 2D) = "white" {}
		[MaterialToggle]_CutOff ("透贴开关", Float) = 0
		_CutOffAlpha ("透贴Alpha阈值", Range(0, 1)) = 0
		[MaterialToggle]_GlowCustomData ("加亮CustomData", Float) = 0
		_Glow("加亮", Range(0,10)) = 1
		_AngleRange ("单边区域角度", Range(0, 360)) = 360

        [Space(15)]
		[MaterialToggle] _SphereDuelMask ("扇形双边遮罩开关", Float) = 0
		_AngleDuelRange ("双边区域角度", Range(0, 360)) = 360
		// _AngleProc ("扇形遮罩百分比", Range(0, 1)) = 0
        [Space(15)]
		[MaterialToggle] _UVCutOn ("UV 线性剔除开关", Float) = 0
		_InnerCutOut ("内圈剔除", Range(0, 1)) = 0

        [Space(15)]
		[HideInInspector] _HorizontalLine ("地平面分割线", Float) = -5000
        [HideInInspector] _HorizontalClip ("地平面切割", Float) = 0
        [Enum(Double, 0, Front, 1, Back, 2)]_CullMode ("面剔除", Float) = 0
	}

	SubShader 
	{
        Tags
		{
			"Queue"="Overlay" 
			"RenderType" = "Transparent" 
			"IgnoreProjector" = "True" 
			"PreviewType" = "Plane" 
			"PerformanceChecks" = "False" 
			"RenderPipeline" = "UniversalPipeline"
		}

		Blend SrcAlpha OneMinusSrcAlpha, SrcAlpha OneMinusSrcAlpha
		Cull [_CullMode] Lighting Off
		ZWrite [_ZWrite] ZTest[_ZTest]

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

            #pragma multi_compile __ _CUTOFF_ON
			#pragma multi_compile __ _SPHEREDUELMASK_ON

			TEXTURE2D(_MainTex); SAMPLER(sampler_MainTex);
			CBUFFER_START(UnityPerMaterial)
				float4 _MainTex_ST;
				half4 _TintColor; half _Glow;
				half _CutOffAlpha;

            	half _HorizontalClip;
            	half _HorizontalLine;
				half _GlowCustomData;

				half _AngleRange;
				half _AngleDuelRange;
				half _InnerCutOut;

				half _UVCutOn;
			CBUFFER_END

			struct Attributes 
			{
				float4 vertex : POSITION;
				half4 color : COLOR;
				float2 texcoord : TEXCOORD0;
                float4 texcoord2 : TEXCOORD1;
                float4 texcoord3 : TEXCOORD2;

    			UNITY_VERTEX_INPUT_INSTANCE_ID
			};
			struct Varyings 
			{
				float4 vertex : SV_POSITION;
				half4 color : COLOR;
				float4 texcoord : TEXCOORD0;
                half3 worldPos : TEXCOORD1;
                float texCustomData : FLOAT;

    			UNITY_VERTEX_INPUT_INSTANCE_ID
    			UNITY_VERTEX_OUTPUT_STEREO
			};

			inline Varyings vert (Attributes v)
			{
				Varyings o = (Varyings)0;

    			UNITY_SETUP_INSTANCE_ID(v);
    			UNITY_TRANSFER_INSTANCE_ID(v, o);
    			UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);

				VertexPositionInputs vertexInput = GetVertexPositionInputs(v.vertex.xyz);
				o.vertex = vertexInput.positionCS;
				o.worldPos.xyz = vertexInput.positionWS;

				o.texcoord.xy = TRANSFORM_TEX(v.texcoord, _MainTex);
				o.texcoord.zw = v.texcoord.xy;
				o.texCustomData = v.texcoord3.y;
				o.color = v.color;

				return o;
			}

			inline half4 frag (Varyings i) : SV_Target
			{
    			UNITY_SETUP_INSTANCE_ID(i);
    			UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);

				half4 col = i.color * _TintColor * SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.texcoord);
				half a = col.a;
				half glowOffset = _GlowCustomData * i.texCustomData * _Glow + (1 - _GlowCustomData) * _Glow;
				col *= glowOffset;
			#if defined(_CUTOFF_ON)
			    clip(col.a - _CutOffAlpha);
			#endif

			#if defined(_SPHEREDUELMASK_ON)
				half dotResDul = dot(half2(0, 1), normalize(i.texcoord.xy - half2(0.5, 0.5)));
				half dotClampDul = step(degrees(acos(dotResDul)), _AngleDuelRange / 2);
				col.rgb *= dotClampDul;
			#else 
				//第一象限：step(0.5, i.texcoord.x) * step(dotRes, 0)
				//第二象限：step(i.texcoord.x, 0.5) * step(dotRes, 0)
				//第三象限：step(i.texcoord.x, 0.5) * step(0, dotRes)
				//第三象限：step(i.texcoord.x, 0.5) * step(dotRes, 0)
			
				half dotRes = dot(half2(0, -1), normalize(i.texcoord.xy - half2(0.5, 0.5)));
				half dotRes2 = dot(half2(0, 1), normalize(i.texcoord.xy - half2(0.5, 0.5)));
			
				// half dotClampOri = step(dotResDul, _AngleRange - 180) - 
				half dotClamp = step(degrees(acos(dotRes)), abs(180 - _AngleRange)) * step(0.5, i.texcoord.x) * step(180, _AngleRange);
				half dotClamp2 = step(degrees(acos(dotRes2)), _AngleRange) * step(i.texcoord.x, 0.5);
				// col.rgb = acos(dotRes) / UNITY_PI;
				col.rgb *= dotClamp2 + dotClamp;
			#endif

				half uvMask = step(_InnerCutOut, i.texcoord.w);
				half mask = step(_InnerCutOut, length(i.texcoord.xy - half2(0.5, 0.5)));
				mask = lerp(mask, uvMask, _UVCutOn);

				a = step(_HorizontalLine, i.worldPos.y) * a * _HorizontalClip + a * (1 - _HorizontalClip);
				return half4(col.rgb * col.a, clamp(a * mask, 0, 1));
			}
		ENDHLSL

		Pass
		{

            Tags { "LightMode" = "UniversalForward" }
			HLSLPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			ENDHLSL
		}

		Pass
		{
			//剔除不受 扭曲影响Pass，默认用脚本Disable掉
			
            Tags { "LightMode" = "ScreenDistortion" }
			HLSLPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			ENDHLSL
		}
    }
	FallBack "Mobile/VertexLit"
}