Added new ramp diffuse ambient mode.

Editor/MeterialEditor/UIScopes/AmbientScope.cs

@@ -17,6 +17,10 @@ namespace Misaki.HdrpToon.Editor
             public static MaterialProperty indirectDiffuseMatCapMap;
             public static MaterialProperty indirectDiffuseMatCapLod;
 
+            public static MaterialProperty indirectDiffuseRampMap;
+            public static MaterialProperty indirectDiffuseRampIndex;
+            public static MaterialProperty indirectDiffuseRampPosition;
+
             public static MaterialProperty indirectDiffuseIntensity;
             public static MaterialProperty ssaoWeight;
             public static MaterialProperty ssgiWeight;
@@ -35,6 +39,9 @@ namespace Misaki.HdrpToon.Editor
 
             public static readonly GUIContent indirectDiffuseMatCapMapText = new("MatCap Map", "The material capture map for indirect diffuse evaluation, with the additional setting for controlling the LOD offset when sampling the indirect diffuse material capture map.");
 
+            public static readonly GUIContent indirectDiffuseRampMapText = new("Ramp Map", "The ramp map for indirect diffuse evaluation, with the additional setting for controlling the sampling index of the ramp map.");
+            public static readonly GUIContent indirectDiffuseRampPositionText = new("Ramp Position", "The ramp position for indirect diffuse evaluation.");
+
             public static readonly GUIContent indirectDiffuseIntensityText = new("Intensity", "The indirect diffuse color is added to the material color according to the intensity value.");
             public static readonly GUIContent ssaoWeightText = new("SSAO Weight", "The weight of SSAO.");
             public static readonly GUIContent ssgiWeightText = new("SSGI Weight", "The weight of SSGI.");
@@ -53,6 +60,10 @@ namespace Misaki.HdrpToon.Editor
             Properties.indirectDiffuseMatCapMap = FindProperty("_IndirectDiffuseMatCapMap");
             Properties.indirectDiffuseMatCapLod = FindProperty("_IndirectDiffuseMatCapLod");
 
+            Properties.indirectDiffuseRampMap = FindProperty("_IndirectDiffuseRampMap");
+            Properties.indirectDiffuseRampIndex = FindProperty("_IndirectDiffuseRampIndex");
+            Properties.indirectDiffuseRampPosition = FindProperty("_IndirectDiffuseRampPosition");
+
             Properties.indirectDiffuseIntensity = FindProperty("_IndirectDiffuseIntensity");
             Properties.ssaoWeight = FindProperty("_SSAOWeight");
             Properties.ssgiWeight = FindProperty("_SSGIWeight");
@@ -64,6 +75,36 @@ namespace Misaki.HdrpToon.Editor
             Properties.ssrWeight = FindProperty("_SSRWeight");
         }
 
+        private static void DrawIndirectDiffuseHeader()
+        {
+            EditorGUILayout.Space();
+            using var indentLevelScope = new EditorGUI.IndentLevelScope(-1);
+            EditorGUILayout.LabelField("Indirect Diffuse", EditorStyles.boldLabel);
+        }
+
+        private void DrawIndirectDiffuseProperties()
+        {
+            EditorGUILayout.Space();
+            editor.ShaderProperty(Properties.indirectDiffuseIntensity, Styles.indirectDiffuseIntensityText);
+            editor.ShaderProperty(Properties.ssaoWeight, Styles.ssaoWeightText);
+        }
+
+        private void DrawIndirectSpecularProperties()
+        {
+            EditorGUILayout.Space();
+            editor.ShaderProperty(Properties.indirectReflectionIntensity, Styles.indirectReflectionIntensityText);
+            editor.ShaderProperty(Properties.ssrWeight, Styles.ssrWeightText);
+        }
+
+        private static void DrawIndirectSpecularHeader()
+        {
+            EditorGUILayout.Space();
+            using (var indentLevelScope = new EditorGUI.IndentLevelScope(-1))
+            {
+                EditorGUILayout.LabelField("Indirect Specular", EditorStyles.boldLabel);
+            }
+        }
+
         protected override void DrawContent()
         {
             editor.ShaderProperty(Properties.indirectDiffuseMode, Styles.indirectDiffuseModeText);
@@ -74,41 +115,43 @@ namespace Misaki.HdrpToon.Editor
 
             if (indirectDiffuseMode != IndirectDiffuseMode.Off)
             {
-                EditorGUILayout.Space();
+                DrawIndirectDiffuseHeader();
-                using (var indentLevelScope = new EditorGUI.IndentLevelScope(-1))
-                {
-                    EditorGUILayout.LabelField("Indirect Diffuse", EditorStyles.boldLabel);
-                }
 
-                if (indirectDiffuseMode == IndirectDiffuseMode.Matcap)
+                switch (indirectDiffuseMode)
-                {
-                    editor.TexturePropertySingleLine(Styles.indirectDiffuseMatCapMapText, Properties.indirectDiffuseMatCapMap, Properties.indirectDiffuseMatCapLod);
-                }
-
-                editor.ShaderProperty(Properties.indirectDiffuseIntensity, Styles.indirectDiffuseIntensityText);
-                editor.ShaderProperty(Properties.ssaoWeight, Styles.ssaoWeightText);
-
-                if (indirectDiffuseMode == IndirectDiffuseMode.IBL)
                 {
+                    case IndirectDiffuseMode.IBL:
                         editor.ShaderProperty(Properties.ssgiWeight, Styles.ssgiWeightText);
-                }
+                        break;
+                    case IndirectDiffuseMode.Matcap:
+                        editor.TexturePropertySingleLine(Styles.indirectDiffuseMatCapMapText, Properties.indirectDiffuseMatCapMap, Properties.indirectDiffuseMatCapLod);
+                        break;
+                    case IndirectDiffuseMode.Ramp:
+                        editor.TexturePropertySingleLine(Styles.indirectDiffuseRampMapText, Properties.indirectDiffuseRampMap, Properties.indirectDiffuseRampIndex);
+                        editor.ShaderProperty(Properties.indirectDiffuseRampPosition, Styles.indirectDiffuseRampPositionText);
+                        break;
+                    default:
+                        break;
                 }
 
-            if (indirectSpecularMode != (int)IndirectSpecularMode.Off)
+                DrawIndirectDiffuseProperties();
-            {
-                EditorGUILayout.Space();
-                using (var indentLevelScope = new EditorGUI.IndentLevelScope(-1))
-                {
-                    EditorGUILayout.LabelField("Indirect Specular", EditorStyles.boldLabel);
             }
 
-                if (indirectSpecularMode == IndirectSpecularMode.Matcap)
+            if (indirectSpecularMode != IndirectSpecularMode.Off)
             {
+                DrawIndirectSpecularHeader();
+
+                switch (indirectSpecularMode)
+                {
+                    case IndirectSpecularMode.IBL:
+                        break;
+                    case IndirectSpecularMode.Matcap:
                         editor.TexturePropertySingleLine(Styles.indirectSpecularMatCapMapText, Properties.indirectSpecularMatCapMap, Properties.indirectSpecularMatCapLod);
+                        break;
+                    default:
+                        break;
                 }
 
-                editor.ShaderProperty(Properties.indirectReflectionIntensity, Styles.indirectReflectionIntensityText);
+                DrawIndirectSpecularProperties();
-                editor.ShaderProperty(Properties.ssrWeight, Styles.ssrWeightText);
             }
         }
     }

Runtime/Shaders/HDRPToon.shader

@@ -183,6 +183,10 @@ Shader "HDRP/Toon"
         _IndirectSpecularMatCapMap("IndirectSpecularMatCapMap", 2D) = "black" {}
         _IndirectSpecularMatCapLod("IndirectSpecularMatCapMapLOD", Range(-5, 5)) = 0.0
 
+        _IndirectDiffuseRampMap("_IndirectDiffuseRampMap", 2DArray) = "black" {}
+        _IndirectDiffuseRampIndex("IndirectDiffuseRampIndex", Integer) = 0
+        _IndirectDiffuseRampPosition("IndirectDiffuseRampPosition", Range(0, 1)) = 0.5
+
         _IndirectSpecularIntensity("Indirect Specular Intensity", Range(0, 5)) = 1.0
         _SSRWeight("SSR Weight", Range(0.0, 1.0)) = 1.0
 

Runtime/Shaders/Includes/Lighting/UtsLightEvaluation.hlsl

@@ -194,9 +194,10 @@ IndirectLighting UtsEvaluateBSDF_MatCapSpecular(float3 positionWS, UtsBSDFData b
     return lighting;
 }
 
-void UtsEvaluateBSDF_Ramp(PositionInputs posInput, UtsBSDFData bsdfData, float3 L, inout BuiltinData builtinData)
+void UtsEvaluateBSDF_Ramp(PositionInputs posInput, UtsBSDFData bsdfData, inout BuiltinData builtinData)
 {
-    // TODO
+    float3 lighting = SAMPLE_TEXTURE2D_ARRAY(_IndirectDiffuseRampMap, s_trilinear_clamp_sampler, float2(_IndirectDiffuseRampPosition, 0.0), _IndirectDiffuseRampIndex).rgb;
+    builtinData.bakeDiffuseLighting = lighting * GetInverseCurrentExposureMultiplier();
 }
 
 IndirectLighting UtsEvaluateBSDF_Env(LightLoopContext lightLoopContext, PositionInputs posInput, PreLightData preLightData, EnvLightData lightData, UtsBSDFData bsdfData, int influenceShapeType, int GPUImageBasedLightingType, inout float hierarchyWeight)

Runtime/Shaders/Includes/Lighting/UtsMaterialEvaluation.hlsl

@@ -139,12 +139,12 @@ DirectLighting UtsShadeSurface(PositionInputs posInput, UtsBSDFData bsdfData, Pr
         float NdotL = dot(bsdfData.normalWS, L);
         float halfLambert = 0.5 * NdotL + 0.5;
     
-        float3 rampColor = SAMPLE_TEXTURE2D_ARRAY_LOD(_ShadingRampMap, s_linear_clamp_sampler, float2(halfLambert * shadow.x, rampMask), _ShadingIndex, 0.0).rgb;
+        float3 rampColor = SAMPLE_TEXTURE2D_ARRAY(_ShadingRampMap, s_linear_clamp_sampler, float2(halfLambert * shadow.x, rampMask), _ShadingIndex).rgb;
         
         diffuseTerm = bsdfData.diffuseColor * rampColor;
         specularTerm *= saturate(NdotL) * sharpShadow;
         #elif _SHADING_MODE_SDF
-        float3 rampColor = SAMPLE_TEXTURE2D_ARRAY_LOD(_ShadingRampMap, s_linear_clamp_sampler, float2(sdfShadowMask * sharpShadow.x, rampMask), _ShadingIndex, 0.0).rgb;
+        float3 rampColor = SAMPLE_TEXTURE2D_ARRAY(_ShadingRampMap, s_linear_clamp_sampler, float2(sdfShadowMask * sharpShadow.x, rampMask), _ShadingIndex).rgb;
         
         diffuseTerm = bsdfData.diffuseColor * rampColor;
         specularTerm = (specularTerm + sdfHighlight) * sdfShadowMask * sharpShadow;

Runtime/Shaders/Includes/Properties/UtsTextures.hlsl

@@ -42,6 +42,8 @@ TEXTURE2D_X(_HairBlendingTex);
 TEXTURE2D(_IndirectDiffuseMatCapMap);
 TEXTURE2D(_IndirectSpecularMatCapMap);
 
+TEXTURE2D_ARRAY(_IndirectDiffuseRampMap);
+
 TEXTURE2D(_ClippingMask);
 
 TEXTURE2D(_AngelRingColorMap);

Runtime/Shaders/Includes/Properties/UtsUnityPerMaterial.hlsl

@@ -9,8 +9,8 @@ float4 _BaseColorMap_ST;
 float4 _BaseColorMap_TexelSize;
 float4 _BaseColorMap_MipInfo;
 
-float _ShadingIndex;
+int _ShadingIndex;
-half _ShadingRampMask;
+float _ShadingRampMask;
 
 float4 _1stShadeColor;
 float4 _2ndShadeColor;
@@ -72,6 +72,9 @@ float _ObjectSpaceUVMappingEmissive;
 // Ambient
 float _IndirectDiffuseMatCapLod;
 
+int _IndirectDiffuseRampIndex;
+float _IndirectDiffuseRampPosition;
+
 float _IndirectDiffuseIntensity;
 float _SSAOWeight;
 float _SSGIWeight;