From b112f70f6aeef16b7e8f596dc3a26e75ae42b010 Mon Sep 17 00:00:00 2001
From: AJ Isaacs <ajisaacs27@gmail.com>
Date: Thu, 12 Mar 2026 23:12:09 -0400
Subject: [PATCH] feat: add LeadOut hierarchy (5 classes)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 .../CuttingStrategy/LeadOuts/ArcLeadOut.cs    | 27 +++++++++++++++++++
 .../CNC/CuttingStrategy/LeadOuts/LeadOut.cs   | 11 ++++++++
 .../CuttingStrategy/LeadOuts/LineLeadOut.cs   | 26 ++++++++++++++++++
 .../LeadOuts/MicrotabLeadOut.cs               | 16 +++++++++++
 .../CNC/CuttingStrategy/LeadOuts/NoLeadOut.cs | 14 ++++++++++
 5 files changed, 94 insertions(+)
 create mode 100644 OpenNest.Core/CNC/CuttingStrategy/LeadOuts/ArcLeadOut.cs
 create mode 100644 OpenNest.Core/CNC/CuttingStrategy/LeadOuts/LeadOut.cs
 create mode 100644 OpenNest.Core/CNC/CuttingStrategy/LeadOuts/LineLeadOut.cs
 create mode 100644 OpenNest.Core/CNC/CuttingStrategy/LeadOuts/MicrotabLeadOut.cs
 create mode 100644 OpenNest.Core/CNC/CuttingStrategy/LeadOuts/NoLeadOut.cs

diff --git a/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/ArcLeadOut.cs b/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/ArcLeadOut.cs
new file mode 100644
index 0000000..95d8724
--- /dev/null
+++ b/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/ArcLeadOut.cs
@@ -0,0 +1,27 @@
+using System.Collections.Generic;
+using OpenNest.Geometry;
+
+namespace OpenNest.CNC.CuttingStrategy
+{
+    public class ArcLeadOut : LeadOut
+    {
+        public double Radius { get; set; }
+
+        public override List<ICode> Generate(Vector contourEndPoint, double contourNormalAngle,
+            RotationType winding = RotationType.CW)
+        {
+            var arcCenterX = contourEndPoint.X + Radius * System.Math.Cos(contourNormalAngle);
+            var arcCenterY = contourEndPoint.Y + Radius * System.Math.Sin(contourNormalAngle);
+            var arcCenter = new Vector(arcCenterX, arcCenterY);
+
+            var endPoint = new Vector(
+                arcCenterX + Radius * System.Math.Cos(contourNormalAngle + System.Math.PI / 2),
+                arcCenterY + Radius * System.Math.Sin(contourNormalAngle + System.Math.PI / 2));
+
+            return new List<ICode>
+            {
+                new ArcMove(endPoint, arcCenter, winding)
+            };
+        }
+    }
+}
diff --git a/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/LeadOut.cs b/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/LeadOut.cs
new file mode 100644
index 0000000..6915c5f
--- /dev/null
+++ b/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/LeadOut.cs
@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+using OpenNest.Geometry;
+
+namespace OpenNest.CNC.CuttingStrategy
+{
+    public abstract class LeadOut
+    {
+        public abstract List<ICode> Generate(Vector contourEndPoint, double contourNormalAngle,
+            RotationType winding = RotationType.CW);
+    }
+}
diff --git a/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/LineLeadOut.cs b/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/LineLeadOut.cs
new file mode 100644
index 0000000..c72847b
--- /dev/null
+++ b/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/LineLeadOut.cs
@@ -0,0 +1,26 @@
+using System.Collections.Generic;
+using OpenNest.Geometry;
+using OpenNest.Math;
+
+namespace OpenNest.CNC.CuttingStrategy
+{
+    public class LineLeadOut : LeadOut
+    {
+        public double Length { get; set; }
+        public double ApproachAngle { get; set; } = 90.0;
+
+        public override List<ICode> Generate(Vector contourEndPoint, double contourNormalAngle,
+            RotationType winding = RotationType.CW)
+        {
+            var overcutAngle = contourNormalAngle + Angle.ToRadians(ApproachAngle);
+            var endPoint = new Vector(
+                contourEndPoint.X + Length * System.Math.Cos(overcutAngle),
+                contourEndPoint.Y + Length * System.Math.Sin(overcutAngle));
+
+            return new List<ICode>
+            {
+                new LinearMove(endPoint)
+            };
+        }
+    }
+}
diff --git a/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/MicrotabLeadOut.cs b/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/MicrotabLeadOut.cs
new file mode 100644
index 0000000..13dc799
--- /dev/null
+++ b/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/MicrotabLeadOut.cs
@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+using OpenNest.Geometry;
+
+namespace OpenNest.CNC.CuttingStrategy
+{
+    public class MicrotabLeadOut : LeadOut
+    {
+        public double GapSize { get; set; } = 0.03;
+
+        public override List<ICode> Generate(Vector contourEndPoint, double contourNormalAngle,
+            RotationType winding = RotationType.CW)
+        {
+            return new List<ICode>();
+        }
+    }
+}
diff --git a/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/NoLeadOut.cs b/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/NoLeadOut.cs
new file mode 100644
index 0000000..8a45cc8
--- /dev/null
+++ b/OpenNest.Core/CNC/CuttingStrategy/LeadOuts/NoLeadOut.cs
@@ -0,0 +1,14 @@
+using System.Collections.Generic;
+using OpenNest.Geometry;
+
+namespace OpenNest.CNC.CuttingStrategy
+{
+    public class NoLeadOut : LeadOut
+    {
+        public override List<ICode> Generate(Vector contourEndPoint, double contourNormalAngle,
+            RotationType winding = RotationType.CW)
+        {
+            return new List<ICode>();
+        }
+    }
+}