2026-04-16 오브젝트 그림자

Packages/com.baddog.rendering.arealight/Shaders/PreIntegratedFGD_Marschner.shader

@@ -0,0 +1,65 @@
+Shader "Hidden/BadDog/URP/PreIntegratedFGD_Marschner"
+{
+    SubShader
+    {
+        Tags{ "RenderPipeline" = "UniversalPipeline" }
+        Pass
+        {
+            ZTest Always Cull Off ZWrite Off
+
+            HLSLPROGRAM
+
+            #pragma editor_sync_compilation
+
+            #pragma vertex Vert
+            #pragma fragment Frag
+            #pragma target 4.5
+            #pragma only_renderers d3d11 playstation xboxone xboxseries vulkan metal switch
+
+            #define PREFER_HALF 0
+            #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
+            #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/ImageBasedLighting.hlsl"
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+
+            // ----------------------------------------------------------------------------
+            // Pre-Integration
+            // ----------------------------------------------------------------------------
+
+            struct Attributes
+            {
+                uint vertexID : SV_VertexID;
+            };
+
+            struct Varyings
+            {
+                float4 positionCS : SV_POSITION;
+                float2 texCoord   : TEXCOORD0;
+            };
+
+            Varyings Vert(Attributes input)
+            {
+                Varyings output;
+
+                output.positionCS = GetFullScreenTriangleVertexPosition(input.vertexID);
+                output.texCoord   = GetFullScreenTriangleTexCoord(input.vertexID);
+
+                return output;
+            }
+
+            float4 Frag(Varyings input) : SV_Target
+            {
+                // Currently, we do not implement the pre-integration of Marschner for two reason:
+                // 1) Area Light support for anisotropic LTC is not supported, and we fall back to GGX.
+                // 2) Environment lighting is evaluated with the BSDF directly.
+
+                float4 preFGD = 0;
+
+                return float4(preFGD.xyz, 1.0);
+            }
+
+            ENDHLSL
+        }
+    }
+    Fallback Off
+}
+