Added a Pulse Node

MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/Procedural/PulseNode.cs

+namespace UnityEngine.MaterialGraph
+{
+    [Title("Procedural/Pulse")]
+    public class PulseNode : Function3Input, IGeneratesFunction
+    {
+        public PulseNode()
+        {
+            name = "Pulse";
+        }
+
+        protected override string GetFunctionName()
+        {
+            return "unity_pulsenode_" + precision;
+        }
+
+        protected override string GetInputSlot1Name()
+        {
+            return "Value";
+        }
+
+        protected override string GetInputSlot2Name()
+        {
+            return "MinValue";
+        }
+
+        protected override string GetInputSlot3Name()
+        {
+            return "MaxValue";
+        }
+
+        protected override MaterialSlot GetInputSlot1()
+        {
+            return new MaterialSlot(InputSlot1Id, GetInputSlot1Name(), kInputSlot1ShaderName, UnityEngine.Graphing.SlotType.Input, SlotValueType.Vector1, Vector2.zero);
+        }
+
+        protected override MaterialSlot GetInputSlot2()
+        {
+            return new MaterialSlot(InputSlot2Id, GetInputSlot2Name(), kInputSlot2ShaderName, UnityEngine.Graphing.SlotType.Input, SlotValueType.Vector1, Vector2.zero);
+        }
+
+        protected override MaterialSlot GetInputSlot3()
+        {
+            return new MaterialSlot(InputSlot3Id, GetInputSlot3Name(), kInputSlot3ShaderName, UnityEngine.Graphing.SlotType.Input, SlotValueType.Vector1, Vector2.zero);
+        }
+
+        protected override MaterialSlot GetOutputSlot()
+        {
+            return new MaterialSlot(OutputSlotId, GetOutputSlotName(), kOutputSlotShaderName, UnityEngine.Graphing.SlotType.Output, SlotValueType.Vector1, Vector2.zero);
+        }
+
+        public void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
+        {
+            var outputString = new ShaderGenerator();
+            outputString.AddShaderChunk(GetFunctionPrototype("value", "minValue", "maxValue"), false);
+            outputString.AddShaderChunk("{", false);
+            outputString.Indent();
+
+            outputString.AddShaderChunk("return step( minValue, value ) - step( maxValue, value );", false);
+
+            outputString.Deindent();
+            outputString.AddShaderChunk("}", false);
+
+            visitor.AddShaderChunk(outputString.GetShaderString(0), true);
+        }
+    }
+}

MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/Procedural/PulseNode.cs.meta

+fileFormatVersion: 2
+guid: f6a740415478c444bb056f9d9d941de2
+timeCreated: 1495559217
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: