2026-04-16 오브젝트 그림자

2026-04-16 04:58:10 +09:00
parent 0fe8b18872
commit 42646a636f
303 changed files with 54374 additions and 20 deletions
--- a/Packages/com.baddog.rendering.arealight/Runtime/Material/LTCAreaLight/LTCAreaLight.cs
+++ b/Packages/com.baddog.rendering.arealight/Runtime/Material/LTCAreaLight/LTCAreaLight.cs
@@ -0,0 +1,135 @@
+using UnityEngine;
+using UnityEngine.Experimental.Rendering;
+using UnityEngine.Rendering;
+using BadDog.Rendering.AreaLight.LTC;
+
+namespace BadDog.Rendering.AreaLight
+{
+    [GenerateHLSL]
+    public enum LTCLightingModel
+    {
+        // Lit, Stack-Lit and Fabric/Silk
+        GGX,
+        DisneyDiffuse,
+
+        // Fabric/CottonWool shader
+        Charlie,
+        // FabricLambert, (Isotropic)
+
+        // Hair
+        KajiyaKaySpecular,
+        // KajiyaKayDiffuse, (Isotropic)
+        Marschner, // TODO
+
+        // Other
+        CookTorrance,
+        Ward,
+        OrenNayar,
+        Count
+    }
+
+    public partial class LTCAreaLight
+    {
+        public static IBRDF GetBRDFInterface(LTCLightingModel model)
+        {
+            switch (model)
+            {
+                case LTCLightingModel.GGX:
+                    return new BRDF_GGX();
+                case LTCLightingModel.DisneyDiffuse:
+                    return new BRDF_Disney();
+
+                case LTCLightingModel.Charlie:
+                    return new BRDF_Charlie();
+
+                case LTCLightingModel.KajiyaKaySpecular:
+                    return new BRDF_KajiyaKaySpecular();
+                case LTCLightingModel.Marschner:
+                    return new BRDF_Marschner();
+
+                case LTCLightingModel.CookTorrance:
+                    return new BRDF_CookTorrance();
+                case LTCLightingModel.Ward:
+                    return new BRDF_Ward();
+                case LTCLightingModel.OrenNayar:
+                    return new BRDF_OrenNayar();
+            }
+            return new BRDF_GGX();
+        }
+
+        static LTCAreaLight s_Instance;
+
+        public static LTCAreaLight instance
+        {
+            get
+            {
+                if (s_Instance == null)
+                    s_Instance = new LTCAreaLight();
+
+                return s_Instance;
+            }
+        }
+
+        int m_refCounting;
+
+        // For area lighting - We pack all texture inside a texture array to reduce the number of resource required
+        Texture2DArray m_LtcData; // 0: m_LtcGGXMatrix - RGBA, 1: m_LtcDisneyDiffuseMatrix - RGBA
+
+        public const int k_LtcLUTResolution = 64;
+
+        LTCAreaLight()
+        {
+            m_refCounting = 0;
+        }
+
+        public void Build()
+        {
+            Debug.Assert(m_refCounting >= 0);
+
+            if (m_refCounting == 0)
+            {
+                m_LtcData = new Texture2DArray(k_LtcLUTResolution, k_LtcLUTResolution, (int)LTCLightingModel.Count, GraphicsFormat.R16G16B16A16_SFloat, TextureCreationFlags.None)
+                {
+                    hideFlags = HideFlags.HideAndDontSave,
+                    wrapMode = TextureWrapMode.Clamp,
+                    filterMode = FilterMode.Bilinear,
+                    name = CoreUtils.GetTextureAutoName(k_LtcLUTResolution, k_LtcLUTResolution, GraphicsFormat.R16G16B16A16_SFloat, depth: (int)LTCLightingModel.Count, dim: TextureDimension.Tex2DArray, name: "LTC_LUT")
+                };
+
+                m_LtcData.SetPixelData(s_LtcMatrixData_BRDF_GGX, 0, (int)LTCLightingModel.GGX);
+                m_LtcData.SetPixelData(s_LtcMatrixData_BRDF_Disney, 0, (int)LTCLightingModel.DisneyDiffuse);
+
+                m_LtcData.SetPixelData(s_LtcMatrixData_BRDF_Charlie, 0, (int)LTCLightingModel.Charlie);
+
+                m_LtcData.SetPixelData(s_LtcMatrixData_BRDF_KajiyaKaySpecular, 0, (int)LTCLightingModel.KajiyaKaySpecular);
+                // TODO: Generate the Marschner LCT Table
+
+                m_LtcData.SetPixelData(s_LtcMatrixData_BRDF_CookTorrance, 0, (int)LTCLightingModel.CookTorrance);
+                m_LtcData.SetPixelData(s_LtcMatrixData_BRDF_Ward, 0, (int)LTCLightingModel.Ward);
+                m_LtcData.SetPixelData(s_LtcMatrixData_BRDF_OrenNayar, 0, (int)LTCLightingModel.OrenNayar);
+
+                m_LtcData.Apply();
+            }
+
+            m_refCounting++;
+        }
+
+        public void Cleanup()
+        {
+            m_refCounting--;
+
+            if (m_refCounting == 0)
+            {
+                CoreUtils.Destroy(m_LtcData);
+            }
+
+            Debug.Assert(m_refCounting >= 0);
+        }
+
+        public void Bind(CommandBuffer cmd)
+        {
+            cmd.SetGlobalTexture("_LtcData", m_LtcData);
+        }
+    }
+}
+