Shader "Spaventacorvi/Glitter/Glitter F - Bumped Specular" {

Properties {
		_Color ("Main color", Color) = (0.7058823,0.7058823,0.7058823,1)
		[MainTexture] _BaseMap ("Base (RGB)", 2D) = "white" {}
		// 新增：饱和度控制开关（0=黑白，1=原色彩）
		_Saturation ("Saturation (0=Grayscale, 1=Color)", Range(0, 1)) = 1.0
		// 核心修改：用Color参数替代三个Range参数，Alpha通道无意义（设为1）
		// 标准ITU-R BT.709灰度公式 float gray = dot(rgb, float3(0.2126, 0.7152, 0.0722));
		_GrayWeights ("Grayscale Weights (R/G/B)", Color) = (0.2126, 0.7152, 0.0722, 1.0)
		wvwvww ("Shininess", Range(0, 1)) = 0.2
		vvxwwx ("Fake light", Range(0, 0.1)) = 0.05
		vwwvvx ("Reflection cubemap", Cube) = "_Skybox" {}
		xxwxww ("Reflection cubemap power", Range(0, 2)) = 0.5
		xxwxwx ("Cubemap blur (0 - 5)", Range(0, 5)) = 0
		_BumpMap ("Normalmap", 2D) = "bump" {}
		vwxwww ("Specular glitter", 2D) = "white" {}
		vxvvvw ("Specular power (0 - 5)", Range(0, 5)) = 1.5
		wxxxvv ("Specular contrast (1 - 3)", Range(1, 3)) = 1
		vvxxww ("Glitter map", 2D) = "white" {}
		vwxvww ("Glitter color", Color) = (1,1,1,1)
		vwwxwx ("Glitter power (0 - 10)", Range(0, 10)) = 2
		vxwwww ("Glitter contrast (1 - 3)", Range(1, 3)) = 1.5
		xvwvwx ("Glittery speed (0 - 1)", Range(0, 1)) = 0.5
		wvvxxw ("Glittery & mask dots scale", Range(0.1, 8)) = 2.5
		wvvxxv ("Mask", 2D) = "black" {}
		wvwwxv ("Mask adjust (0.5 - 1.5)", Range(0.5, 1.5)) = 1
		[HideInInspector][NoScaleOffset]unity_Lightmaps("unity_Lightmaps", 2DArray) = "" {}
		[HideInInspector][NoScaleOffset]unity_LightmapsInd("unity_LightmapsInd", 2DArray) = "" {}
		[HideInInspector][NoScaleOffset]unity_ShadowMasks("unity_ShadowMasks", 2DArray) = "" {}
	}
	SubShader {
		Tags {
			"RenderPipeline"="UniversalPipeline"
			"RenderType"="Opaque"
			"UniversalMaterialType" = "Lit"
		}
		Pass {
			Name "ForwardLit"
			Tags { "LightMode"="UniversalForward" }

			HLSLPROGRAM

			#pragma vertex vertex
			#pragma fragment fragment
			#pragma multi_compile_fwdbase_fullshadows
			#pragma multi_compile_fog
			#pragma exclude_renderers xbox360 ps3 
			#pragma target 3.0
			#pragma glsl
			uniform float4 _LightColor0;
			uniform sampler2D wvvxxv; uniform float4 wvvxxv_ST;
			uniform float wvwvww;
			uniform sampler2D _BaseMap; uniform float4 _BaseMap_ST;
			uniform sampler2D vwxwww; uniform float4 vwxwww_ST;
			uniform float vxvvvw;
			uniform float vwwxwx;
			uniform float4 _Color;
			uniform samplerCUBE vwwvvx;
			uniform float xxwxww;
			uniform sampler2D _BumpMap; uniform float4 _BumpMap_ST;
			uniform float vvxwwx;
			uniform float4 vwxvww;
			uniform float wvvxxw;
			uniform float xvwvwx;
			uniform sampler2D vvxxww; uniform float4 vvxxww_ST;
			uniform float vxwwww;
			uniform float wxxxvv;
			uniform float wvwwxv;
			uniform float xxwxwx;
			// 新增：声明饱和度变量
			uniform float _Saturation;
			// 声明Color类型的灰度权重变量（float4）
			uniform float4 _GrayWeights;

			// Includes
			#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.universal/ShaderLibrary/ShaderGraphFunctions.hlsl"
			// 新增：RGB转灰度（黑白）的工具函数
			float3 RGBToGrayscale(float3 rgb) {
				// 提取Color参数的R/G/B分量作为权重（忽略Alpha）
				float3 weights = _GrayWeights.rgb;
				// 可选：归一化权重，避免总和不为1导致亮度异常
				float totalWeight = max(dot(weights, float3(1,1,1)), 0.0001); // 防止除0
				weights = weights / totalWeight;
				// 计算灰度值
				float gray = dot(rgb, weights);
				// 显式赋值给float3的三个分量，避免构造函数报错
				return float3(gray, gray, gray);
			}
			// Structs
			struct Attributes {
				float4 vertex	: POSITION;
				float4 normal	: NORMAL;
				float4 tangent 	: TANGENT;
				float2 uv		: TEXCOORD0;
			};

			struct Varyings {
				float4 pos 	: SV_POSITION;
				float2 uv0	: TEXCOORD0;
				float3 posWorld : TEXCOORD1;
				half4  normalDir : TEXCOORD2;
				half4  tangentDir : TEXCOORD3;
				half4  bitangentDir : TEXCOORD4;
				half4 fogFactorAndVertexLight  : TEXCOORD5; // x: fogFactor, yzw: vertex light
			};

			// void MainLightDirection_float(out float3 Direction)
			// {
			//     #if SHADERGRAPH_PREVIEW
			//     Direction = half3(-0.5, -0.5, 0);
			//     #else
			//     Direction = SHADERGRAPH_MAIN_LIGHT_DIRECTION();
			//     #endif
			// }

			// Vertex Shader
			Varyings vertex(Attributes IN) {
				Varyings OUT;
				VertexPositionInputs positionInputs = GetVertexPositionInputs(IN.vertex.xyz);
				VertexNormalInputs normalInputs = GetVertexNormalInputs(IN.normal.xyz, IN.tangent);

				OUT.pos = positionInputs.positionCS;
				OUT.posWorld = positionInputs.positionWS;

				half3 viewDirWS = GetWorldSpaceViewDir(positionInputs.positionWS);
				half3 vertexLight = VertexLighting(positionInputs.positionWS, normalInputs.normalWS);
				
				OUT.normalDir = half4(normalInputs.normalWS, viewDirWS.x);
				OUT.tangentDir = half4(normalInputs.tangentWS, viewDirWS.y);
				OUT.bitangentDir = half4(normalInputs.bitangentWS, viewDirWS.z);

				OUT.fogFactorAndVertexLight = half4(0, vertexLight);

				OUT.uv0 = TRANSFORM_TEX(IN.uv, _BaseMap);
				return OUT;
			}
	// ========== 核心修复：适配所有URP版本的光源获取函数 ==========
			Light GetLightMeshRenderingLayer(float3 positionWS)
			{
				// 1. 兼容不同URP版本的主光源获取
				Light mainLight;
				#if UNITY_URP_VERSION >= 110000 // URP 11.x+ 带参调用
					mainLight = GetMainLight(positionWS);
				#else // URP 10.x及以下 无参调用
					mainLight = GetMainLight();
				#endif

				// 2. 检查主光源是否匹配当前渲染层
				uint meshRenderingLayers = GetMeshRenderingLayer();
				if (IsMatchingLightLayer(mainLight.layerMask, meshRenderingLayers))
				{
					return mainLight;
				}

				// 3. 遍历附加光源，寻找匹配的光源
				uint lightsCount = GetAdditionalLightsCount();
				LIGHT_LOOP_BEGIN(lightsCount)
				Light additionalLight = GetAdditionalLight(lightIndex, positionWS);
				if (IsMatchingLightLayer(additionalLight.layerMask, meshRenderingLayers))
				{
					return additionalLight;
				}
				LIGHT_LOOP_END

				// 4. 兜底：若没有匹配的光源，返回主光源（避免空值）
				return mainLight;
			}

			// Fragment Shader
			half4 fragment(Varyings i) : SV_Target {
				i.normalDir = normalize(i.normalDir);
				float3x3 tangentTransform = float3x3( i.tangentDir.xyz, i.bitangentDir.xyz, i.normalDir.xyz);
				float3 viewDirection = normalize(_WorldSpaceCameraPos.xyz - i.posWorld.xyz);
				float3 _BumpMap_var = UnpackNormal(tex2D(_BumpMap,TRANSFORM_TEX(i.uv0, _BumpMap)));
				float3 normalLocal = _BumpMap_var.rgb;
				float3 normalDirection = normalize(mul( normalLocal, tangentTransform ));
				float3 viewReflectDirection = reflect( -viewDirection, normalDirection );
				// float3 lightDirection;  //normalize(_WorldSpaceLightPos0.xyz);
				// MainLightDirection_float(lightDirection);

				Light light = GetLightMeshRenderingLayer(i.posWorld);
				float3 lightDirection = light.direction;
				float3 lightColor = light.color* light.distanceAttenuation;

				float3 halfDirection = normalize(viewDirection+lightDirection);
				float attenuation = 1;
				float3 attenColor = attenuation * lightColor;
				float specPow = exp2(wvwvww * 10.0+1.0);
				float NdotL = max(0, dot( normalDirection, lightDirection ));
				float xvxwww = 0.0;
				float2 vwwvxw = ((0.05*(xvwvwx - xvxwww)*mul(tangentTransform, viewDirection).xy + i.uv0).rg*((xvwvwx/2.0)+1.0)*wvvxxw);
				float4 wwvxvx = tex2D(vvxxww,TRANSFORM_TEX(vwwvxw, vvxxww));
				float vxxxwx = 0.0;
				float vwvxwv_ang = 3.14;
				float vwvxwv_spd = 1.0;
				float vwvxwv_cos = cos(vwvxwv_spd*vwvxwv_ang);
				float vwvxwv_sin = sin(vwvxwv_spd*vwvxwv_ang);
				float2 vwvxwv_piv = float2(0.5,0.5);
				float2 vwvxwv = (mul((0.05*((-1*xvwvwx) - xvxwww)*mul(tangentTransform, viewDirection).xy + i.uv0).rg-vwvxwv_piv,float2x2( vwvxwv_cos, -vwvxwv_sin, vwvxwv_sin, vwvxwv_cos))+vwvxwv_piv);
				float2 wvxwxw = (vwvxwv*wvvxxw*(1.0-(xvwvwx/3.141592654))*wvwwxv);
				float4 xwvwvw = tex2D(vvxxww,TRANSFORM_TEX(wvxwxw, vvxxww));
				float4 wvvxxv_var = tex2D(wvvxxv,TRANSFORM_TEX(i.uv0, wvvxxv));
				float4 vwxwww_var = tex2D(vwxwww,TRANSFORM_TEX(i.uv0, vwxwww));
				float3 wxvxxw = (lerp(pow(abs((vwwxwx*vwxvww.rgb)*wwvxvx.rgb),vxwwww),float3(vxxxwx,vxxxwx,vxxxwx),max((1.0 - xwvwvw.rgb),wvvxxv_var.rgb))+lerp(pow(abs(vwxwww_var.rgb*vxvvvw),wxxxvv),float3(vxxxwx,vxxxwx,vxxxwx),wvvxxv_var.rgb));
				float3 specularColor = wxvxxw;
				float3 directSpecular = attenColor * pow(max(0,dot(halfDirection,normalDirection)),specPow)*specularColor;
				float3 specular = directSpecular;
				NdotL = max(0.0,dot( normalDirection, lightDirection ));
				float3 directDiffuse = max( 0.0, NdotL) * attenColor;
				float3 indirectDiffuse = float3(0,0,0);
				indirectDiffuse += UNITY_LIGHTMODEL_AMBIENT.rgb;
				float4 _BaseMap_var = tex2D(_BaseMap,TRANSFORM_TEX(i.uv0, _BaseMap));

				float3 diffuseColor = _BaseMap_var.rgb;
				// 核心修改：饱和度控制（混合原色彩和灰度）
				float3 grayscaleColor = RGBToGrayscale(diffuseColor);
				diffuseColor = lerp(grayscaleColor, diffuseColor, _Saturation);
				diffuseColor = (diffuseColor*_Color.rgb);

				float3 diffuse = (directDiffuse + indirectDiffuse) * diffuseColor;
				float3 emissive = ((wxvxxw*vvxwwx)+(texCUBElod(vwwvvx,float4(viewReflectDirection,xxwxwx)).rgb*xxwxww));
				float3 finalColor = diffuse + specular + emissive;
				
				half4 finalRGBA = half4(finalColor,_BaseMap_var.a);
				clip(finalRGBA.a - 0.1);
				return finalRGBA;
			}
			ENDHLSL
		}
	}
}