Add Not node

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Nodes/Utility/Logic/NotNode.cs

+using System.Reflection;
+using UnityEngine;
+using UnityEditor.Graphing;
+using UnityEditor.ShaderGraph.Drawing.Controls;
+
+namespace UnityEditor.ShaderGraph
+{
+    [Title("Utility", "Logic", "Not")]
+    public class NotNode : CodeFunctionNode
+    {
+        public NotNode()
+        {
+            name = "Not";
+        }
+
+        public override bool hasPreview
+        {
+            get { return false; }
+        }
+
+        protected override MethodInfo GetFunctionToConvert()
+        {
+            return GetType().GetMethod("Unity_Not", BindingFlags.Static | BindingFlags.NonPublic);
+        }
+
+        static string Unity_Not(
+            [Slot(0, Binding.None)] Boolean In,
+            [Slot(1, Binding.None)] out Boolean Out)
+        {
+            return
+                @"
+{
+    Out = !In;
+}
+";
+        }
+    }
+}

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Nodes/Utility/Logic/NotNode.cs.meta

+fileFormatVersion: 2
+guid: acb4138f9cef644dfa59102e871d1820
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: