XMen/Assets/Shader/MRObStacle.shader

Shader "MR/MRObstacle"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
		[Toggle(_Enable)]_Enable("Enable" , Float) = 1.0
	}

	SubShader
	{
		LOD 0

		Tags { "RenderPipeline"="UniversalPipeline" "RenderType"="Geometry" "Queue"="Geometry-50" "UniversalMaterialType"="Lit" }

		HLSLINCLUDE
		#pragma target 3.5
		#pragma prefer_hlslcc gles
		#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
		#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Filtering.hlsl"
		ENDHLSL

		// 自阴影留用，勿删
		// Pass
        // {
        //     Name "ShadowCaster"
        //     Tags{"LightMode" = "ShadowCaster"}

        //     ZWrite On
        //     ZTest LEqual
        //     ColorMask 0
        //     Cull[_Cull]

        //     HLSLPROGRAM
        //     #pragma exclude_renderers gles gles3 glcore
        //     #pragma target 4.5

        //     // -------------------------------------
        //     // Material Keywords
        //     #pragma shader_feature_local_fragment _ALPHATEST_ON
        //     #pragma shader_feature_local_fragment _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A

        //     //--------------------------------------
        //     // GPU Instancing
        //     #pragma multi_compile_instancing
        //     #pragma multi_compile _ DOTS_INSTANCING_ON

        //     #pragma vertex ShadowPassVertex
        //     #pragma fragment ShadowPassFragment

        //     #include "Packages/com.unity.render-pipelines.universal/Shaders/LitInput.hlsl"
        //     #include "Packages/com.unity.render-pipelines.universal/Shaders/ShadowCasterPass.hlsl"
        //     ENDHLSL
        // }
		
		Pass
		{
			Name "Forward"

			Tags { "LightMode"="UniversalForward" }
			
			Cull Back
			AlphaToMask Off
			Blend SrcAlpha OneMinusSrcAlpha
			ZWrite On
			ZTest LEqual
			Offset 0 , 0
			ColorMask RGBA

			HLSLPROGRAM

			#pragma multi_compile _ _MAIN_LIGHT_SHADOWS _MAIN_LIGHT_SHADOWS_CASCADE _MAIN_LIGHT_SHADOWS_SCREEN
			#pragma multi_compile_fragment _ _REFLECTION_PROBE_BLENDING
			#pragma multi_compile_fragment _ _REFLECTION_PROBE_BOX_PROJECTION
			#pragma multi_compile_fragment _ _DBUFFER_MRT1 _DBUFFER_MRT2 _DBUFFER_MRT3

			#pragma multi_compile _ SHADOWS_SHADOWMASK
			#pragma multi_compile _ DIRLIGHTMAP_COMBINED

			#pragma vertex vert
			#pragma fragment frag

			#define SHADERPASS SHADERPASS_FORWARD

			#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/Shadows.hlsl"

			struct VertexInput
			{
				float4 vertex : POSITION;
				float3 normal : NORMAL;
				float4 tangent : TANGENT;
			};

			struct VertexOutput
			{
				float4 clipPos : SV_POSITION;
				float4 clipPosV : TEXCOORD0;
				float4 tSpace0 : TEXCOORD3;
				float4 tSpace1 : TEXCOORD4;
				float4 tSpace2 : TEXCOORD5;
			};

			sampler2D _ShadowMapTexture;
			half _Enable;  

			VertexOutput vert ( VertexInput v )
			{
				VertexOutput o = (VertexOutput)0;
				float3 positionWS = TransformObjectToWorld( v.vertex.xyz );
				float3 positionVS = TransformWorldToView( positionWS );
				float4 positionCS = TransformWorldToHClip( positionWS );
				VertexNormalInputs normalInput = GetVertexNormalInputs( v.normal, v.tangent );
				o.tSpace0 = float4( normalInput.normalWS, positionWS.x);
				o.tSpace1 = float4( normalInput.tangentWS, positionWS.y);
				o.tSpace2 = float4( normalInput.bitangentWS, positionWS.z);
				half3 vertexLight = VertexLighting( positionWS, normalInput.normalWS );
				o.clipPos = positionCS;
				o.clipPosV = positionCS;
				return o;
			}
			
			half4 frag (VertexOutput IN) : SV_Target
			{
				half4 color = 0;
				if(_Enable == 1.0){
					float3 WorldPosition = float3(IN.tSpace0.w, IN.tSpace1.w, IN.tSpace2.w);
					float4 ShadowCoords = TransformWorldToShadowCoord(WorldPosition);
				
					int sampleCount = 5; 
					float offset = 1.0 / 4096.0; 
				
					for (int i = 0; i < sampleCount; i++)
					{
						for (int j = 0; j < sampleCount; j++)
						{
							float4 offsetShadowCoords = ShadowCoords;
							offsetShadowCoords.xy += float2((i - sampleCount / 2) * offset, (j - sampleCount / 2) * offset);
							Light light = GetMainLight(offsetShadowCoords);
							half4 sampledColor = float4(0, 0, 0, 1 - light.shadowAttenuation);
							color += sampledColor;
						}
					}
					color /= sampleCount * sampleCount;
				}
				return color;
			}
			ENDHLSL
		}
	}
	
	FallBack "Hidden/Shader Graph/FallbackError"
	
	Fallback Off
}