备份CatanBuilding瘦身独立工程

LocalPackages/zzwater/shaders/FSBlur.shader

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+Shader "zzwater/FSBlur"
+{
+
+
+    Properties
+    {
+        _MainTex ("Texture", 2D) = "white" {}
+        _DepthThreshold ("Depth Threshold", Range(0, 200)) = 50 
+        //_BlurRadius ("Blur Radius", Range(1, 10)) = 3
+    }
+
+    SubShader
+    {
+        Tags { "RenderType"="Opaque" "RenderPipeline" = "UniversalPipeline"}
+        LOD 100
+        ZWrite Off Cull Off
+        Pass
+        {
+            Name "FSBlur"
+
+            HLSLPROGRAM
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+            
+            // The Blit.hlsl file provides the vertex shader (Vert),
+            // the input structure (Attributes) and the output structure (Varyings)
+            #include "Packages/com.unity.render-pipelines.core/Runtime/Utilities/Blit.hlsl"
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DeclareDepthTexture.hlsl"
+
+            #pragma vertex Vert
+            #pragma fragment frag
+
+
+            float _DepthThreshold;
+            SAMPLER(sampler_BlitTexture);
+            float4 _BlitTexture_TexelSize;
+
+
+            half4 frag (Varyings input) : SV_Target
+            {
+                // Sample depth
+                float deviceDepth = SampleSceneDepth(input.texcoord);
+                float linearDepth = LinearEyeDepth(deviceDepth, _ZBufferParams);
+                float _BlurRadius = 5;
+
+                // Original color
+                half4 originalColor = SAMPLE_TEXTURE2D(_BlitTexture, sampler_BlitTexture, input.texcoord);
+
+                // If depth is less than threshold, return original color
+                if (linearDepth < _DepthThreshold)
+                    return originalColor;
+                
+                // Simple box blur (much faster than Gaussian)
+                half4 blurredColor = half4(0, 0, 0, 0);
+                int samples = 0;
+                
+                // Use fixed radius for simplicity
+                for (int x = -_BlurRadius; x <= _BlurRadius; x++)
+                {
+                    for (int y = -_BlurRadius; y <= _BlurRadius; y++)
+                    {
+                        float2 offset = float2(x, y) * _BlitTexture_TexelSize;
+                        blurredColor += SAMPLE_TEXTURE2D(_BlitTexture, sampler_BlitTexture, input.texcoord + offset);
+                        samples++;
+                    }
+                }
+                
+                // Average the samples
+                return blurredColor / samples;
+
+            }
+            ENDHLSL
+        }
+    }
+}