PR Fixes

- Add boolean slot control view
- Add nodes And/Nand/Or
- Fix Branch node defaults
- Add USS for boolean slot

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Graphs/BooleanMaterialSlot.cs

             m_Value = value;
         }
 
+        public override VisualElement InstantiateControl()
+        {
+            return new BooleanSlotControlView(this);
+        }
+
         public bool defaultValue { get { return m_DefaultValue; } }
 
         public bool value

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

 
         static string Unity_Branch(
             [Slot(0, Binding.None)] Boolean Predicate,
-            [Slot(1, Binding.None)] DynamicDimensionVector True,
-            [Slot(2, Binding.None)] DynamicDimensionVector False,
+            [Slot(1, Binding.None, 1, 1, 1, 1)] DynamicDimensionVector True,
+            [Slot(2, Binding.None, 0, 0, 0, 0)] DynamicDimensionVector False,
             [Slot(3, Binding.None)] out DynamicDimensionVector Out)
         {
             return

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Resources/Styles/MaterialGraph.uss

     width: 50;
 }
 
+BooleanSlotControlView {
+    flex-direction: row;
+    align-items: center;
+}
+
+BooleanSlotControlView > Toggle {
+    width: 20;
+}
+
 .edge.fromMatrix4, .edge.fromMatrix3, .edge.fromMatrix2 {
     edge-output-color: #8FC1DF;
 }

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

+using System.Reflection;
+using UnityEngine;
+using UnityEditor.Graphing;
+using UnityEditor.ShaderGraph.Drawing.Controls;
+
+namespace UnityEditor.ShaderGraph
+{
+    [Title("Utility", "Logic", "And")]
+    public class AndNode : CodeFunctionNode
+    {
+        public AndNode()
+        {
+            name = "And";
+        }
+
+        public override bool hasPreview
+        {
+            get { return false; }
+        }
+
+        protected override MethodInfo GetFunctionToConvert()
+        {
+            return GetType().GetMethod("Unity_And", BindingFlags.Static | BindingFlags.NonPublic);
+        }
+
+        static string Unity_And(
+            [Slot(0, Binding.None)] Boolean A,
+            [Slot(1, Binding.None)] Boolean B,
+            [Slot(2, Binding.None)] out Boolean Out)
+        {
+            return
+                @"
+{
+    Out = A && B;
+}
+";
+        }
+    }
+}

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

+fileFormatVersion: 2
+guid: 34929a6d0bb40407fb00206ab0a10fa1
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 

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

+using System.Reflection;
+using UnityEngine;
+using UnityEditor.Graphing;
+using UnityEditor.ShaderGraph.Drawing.Controls;
+
+namespace UnityEditor.ShaderGraph
+{
+    [Title("Utility", "Logic", "Nand")]
+    public class NandNode : CodeFunctionNode
+    {
+        public NandNode()
+        {
+            name = "Nand";
+        }
+
+        public override bool hasPreview
+        {
+            get { return false; }
+        }
+
+        protected override MethodInfo GetFunctionToConvert()
+        {
+            return GetType().GetMethod("Unity_Nand", BindingFlags.Static | BindingFlags.NonPublic);
+        }
+
+        static string Unity_Nand(
+            [Slot(0, Binding.None)] Boolean A,
+            [Slot(1, Binding.None)] Boolean B,
+            [Slot(2, Binding.None)] out Boolean Out)
+        {
+            return
+                @"
+{
+    Out = !A && !B;
+}
+";
+        }
+    }
+}

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

+fileFormatVersion: 2
+guid: 4defde87a9d5e44d8b8900d3f8ef6440
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 

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

+using System.Reflection;
+using UnityEngine;
+using UnityEditor.Graphing;
+using UnityEditor.ShaderGraph.Drawing.Controls;
+
+namespace UnityEditor.ShaderGraph
+{
+    [Title("Utility", "Logic", "Or")]
+    public class OrNode : CodeFunctionNode
+    {
+        public OrNode()
+        {
+            name = "Or";
+        }
+
+        public override bool hasPreview
+        {
+            get { return false; }
+        }
+
+        protected override MethodInfo GetFunctionToConvert()
+        {
+            return GetType().GetMethod("Unity_Or", BindingFlags.Static | BindingFlags.NonPublic);
+        }
+
+        static string Unity_Or(
+            [Slot(0, Binding.None)] Boolean A,
+            [Slot(1, Binding.None)] Boolean B,
+            [Slot(2, Binding.None)] out Boolean Out)
+        {
+            return
+                @"
+{
+    Out = A || B;
+}
+";
+        }
+    }
+}

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

+fileFormatVersion: 2
+guid: 0f6f860c0f1e24214b5d2974cc624227
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Views/Slots/BooleanSlotControlView.cs

+using System;
+using UnityEditor.Experimental.UIElements;
+using UnityEditor.Graphing;
+using UnityEngine;
+using UnityEngine.Experimental.UIElements;
+
+namespace UnityEditor.ShaderGraph.Drawing.Slots
+{
+    public class BooleanSlotControlView : VisualElement
+    {
+        BooleanMaterialSlot m_Slot;
+
+        public BooleanSlotControlView(BooleanMaterialSlot slot)
+        {
+            m_Slot = slot;
+            Action changedToggle = () => { OnChangeToggle(); };
+            var toggleField = new UnityEngine.Experimental.UIElements.Toggle(changedToggle);
+            Add(toggleField);
+        }
+
+        void OnChangeToggle()
+        {
+            m_Slot.owner.owner.owner.RegisterCompleteObjectUndo("Toggle Change");
+            var value = m_Slot.value;
+            value = !value;
+            m_Slot.value = value;
+            m_Slot.owner.Dirty(ModificationScope.Node);
+        }
+    }
+}

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Views/Slots/BooleanSlotControlView.cs.meta

+fileFormatVersion: 2
+guid: 7fc29d436587748dcaaefd8669c3d946
+timeCreated: 1510659384