Started work on Rounded Rectangle node

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Nodes/Procedural/Shape/RoundedRectangleNode.cs

+using System.Reflection;
+using UnityEngine;
+
+namespace UnityEditor.ShaderGraph
+{
+    [Title("Procedural", "Shape", "Rounded Rectangle")]
+    public class RoundedRectangleNode : CodeFunctionNode
+    {
+        public RoundedRectangleNode()
+        {
+            name = "Rounded Rectangle";
+        }
+
+        protected override MethodInfo GetFunctionToConvert()
+        {
+            return GetType().GetMethod("Unity_RoundedRectangle", BindingFlags.Static | BindingFlags.NonPublic);
+        }
+
+        static string Unity_RoundedRectangle(
+            [Slot(0, Binding.MeshUV0)] Vector2 UV,
+            [Slot(1, Binding.None, 0.5f, 0, 0, 0)] Vector1 Width,
+            [Slot(2, Binding.None, 0.5f, 0, 0, 0)] Vector1 Height,
+            [Slot(3, Binding.None, 0.1f, 0, 0, 0)] Vector1 Radius,
+            [Slot(4, Binding.None)] out Vector1 Out)
+        {
+            return
+                @"
+{
+    {precision}2 XMinAndMax = {precision}2(0.5 - Width / 2, 0.5 + Width / 2);
+    {precision}2 YMinAndMax = {precision}2(0.5 - Height / 2, 0.5 + Height / 2);
+    {precision} x = step( XMinAndMax.x, UV.x ) - step( XMinAndMax.y, UV.x );
+    {precision} y = step( YMinAndMax.x, UV.y ) - step( YMinAndMax.y, UV.y );
+    {precision} B = x * y;
+    {precision} sw = step(length(UV - {precision}2(XMinAndMax.x + Radius, YMinAndMax.x + Radius)), Radius);
+    {precision} se = step(length(UV - {precision}2(XMinAndMax.y - Radius, YMinAndMax.x + Radius)), Radius);
+    {precision} nw = step(length(UV - {precision}2(XMinAndMax.x + Radius, YMinAndMax.y - Radius)), Radius);
+    {precision} ne = step(length(UV - {precision}2(XMinAndMax.y - Radius, YMinAndMax.y - Radius)), Radius);
+    {precision} A = saturate(sw + se + nw + ne);
+    Out = A;
+}";
+        }
+    }
+}

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Nodes/Procedural/Shape/RoundedRectangleNode.cs.meta

+fileFormatVersion: 2
+guid: faba19d28a5fc1d4187c0124658f1822
+timeCreated: 1495565599
+licenseType: Pro
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+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
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+  assetBundleVariant: