feat(shader): add ambient lighting to Toon shadergraph

Assets/Main.unity

@@ -1941,7 +1941,7 @@ PrefabInstance:
     m_Modifications:
     - target: {fileID: -364223573239433514, guid: 0419d2e6e681caa47baeec4f66d9e3eb, type: 3}
       propertyPath: m_LocalPosition.x
-      value: 0.453
+      value: 0.746
       objectReference: {fileID: 0}
     - target: {fileID: -364223573239433514, guid: 0419d2e6e681caa47baeec4f66d9e3eb, type: 3}
       propertyPath: m_LocalPosition.y
@@ -1949,7 +1949,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: -364223573239433514, guid: 0419d2e6e681caa47baeec4f66d9e3eb, type: 3}
       propertyPath: m_LocalPosition.z
-      value: 0.26
+      value: 0.019
       objectReference: {fileID: 0}
     - target: {fileID: -364223573239433514, guid: 0419d2e6e681caa47baeec4f66d9e3eb, type: 3}
       propertyPath: m_LocalRotation.w

Assets/Resources/Toon.cginc

@@ -1,12 +1,13 @@
 #ifndef TOON_MAINLIGHT_INCLUDED
 #define TOON_MAINLIGHT_INCLUDED
 
-void MainLight_float(float3 WorldPos, out float3 Direction, out float3 Color, out float ShadowAtten)
+void MainLight_float(float3 WorldPos, out float3 Direction, out float3 Color, out float ShadowAtten, out float3 Ambient)
 {
 #ifdef SHADERGRAPH_PREVIEW
     Direction   = normalize(float3(0.5, 0.5, -0.5));
     Color       = 1;
     ShadowAtten = 1;
+    Ambient     = 0.2;
 #else
     float4 shadowCoord = TransformWorldToShadowCoord(WorldPos);
     Light mainLight = GetMainLight();
@@ -26,6 +27,8 @@ void MainLight_float(float3 WorldPos, out float3 Direction, out float3 Color, ou
 
     // Beyond the max shadow distance -> no shadow
     ShadowAtten = BEYOND_SHADOW_FAR(shadowCoord) ? 1.0 : atten;
+
+    Ambient = SampleSH(0);
 #endif
 }
 

Assets/Resources/Toon.shadergraph

@@ -306,6 +306,29 @@
     "m_ColorMode": 0
 }
 
+{
+    "m_SGVersion": 0,
+    "m_Type": "UnityEditor.ShaderGraph.Vector3MaterialSlot",
+    "m_ObjectId": "06d893c395e54484bbf110242f2ea0d1",
+    "m_Id": 5,
+    "m_DisplayName": "Ambient",
+    "m_SlotType": 1,
+    "m_Hidden": false,
+    "m_ShaderOutputName": "Ambient",
+    "m_StageCapability": 3,
+    "m_Value": {
+        "x": 0.0,
+        "y": 0.0,
+        "z": 0.0
+    },
+    "m_DefaultValue": {
+        "x": 0.0,
+        "y": 0.0,
+        "z": 0.0
+    },
+    "m_Labels": []
+}
+
 {
     "m_SGVersion": 0,
     "m_Type": "UnityEditor.ShaderGraph.Vector4MaterialSlot",
@@ -858,9 +881,9 @@
         "m_Expanded": true,
         "m_Position": {
             "serializedVersion": "2",
-            "x": -205.00003051757813,
-            "y": 436.0,
-            "width": 130.00003051757813,
+            "x": -200.0,
+            "y": 406.0,
+            "width": 130.0,
             "height": 118.0
         }
     },
@@ -919,6 +942,9 @@
         },
         {
             "m_Id": "2a5d996f8d3a4513a9d23991d555c3a7"
+        },
+        {
+            "m_Id": "06d893c395e54484bbf110242f2ea0d1"
         }
     ],
     "synonyms": [
@@ -951,10 +977,10 @@
         "m_Expanded": true,
         "m_Position": {
             "serializedVersion": "2",
-            "x": -388.9999694824219,
-            "y": 313.0000305175781,
-            "width": 130.0,
-            "height": 142.0
+            "x": -425.99993896484377,
+            "y": 235.99998474121095,
+            "width": 129.99996948242188,
+            "height": 142.00001525878907
         }
     },
     "m_Slots": [