From f4779b878cab6bfbe452c8efbe0792fe6eb739d3 Mon Sep 17 00:00:00 2001
From: AJ Isaacs <ajisaacs27@gmail.com>
Date: Sat, 7 Mar 2026 00:52:11 -0500
Subject: [PATCH] feat: add Pattern class for grouping parts with relative
 positions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 OpenNest.Engine/OpenNest.Engine.csproj |  1 +
 OpenNest.Engine/Pattern.cs             | 57 ++++++++++++++++++++++++++
 2 files changed, 58 insertions(+)
 create mode 100644 OpenNest.Engine/Pattern.cs

diff --git a/OpenNest.Engine/OpenNest.Engine.csproj b/OpenNest.Engine/OpenNest.Engine.csproj
index 03e28a8..ee66de5 100644
--- a/OpenNest.Engine/OpenNest.Engine.csproj
+++ b/OpenNest.Engine/OpenNest.Engine.csproj
@@ -45,6 +45,7 @@
     <Compile Include="NestDirection.cs" />
     <Compile Include="NestEngine.cs" />
     <Compile Include="NestItem.cs" />
+    <Compile Include="Pattern.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="RectanglePacking\Bin.cs" />
     <Compile Include="RectanglePacking\FillBestFit.cs" />
diff --git a/OpenNest.Engine/Pattern.cs b/OpenNest.Engine/Pattern.cs
new file mode 100644
index 0000000..1cdb2e4
--- /dev/null
+++ b/OpenNest.Engine/Pattern.cs
@@ -0,0 +1,57 @@
+using System.Collections.Generic;
+using OpenNest.Geometry;
+
+namespace OpenNest
+{
+    public class Pattern
+    {
+        public Pattern()
+        {
+            Parts = new List<Part>();
+        }
+
+        public List<Part> Parts { get; }
+
+        public Box BoundingBox { get; private set; }
+
+        public void UpdateBounds()
+        {
+            BoundingBox = Parts.GetBoundingBox();
+        }
+
+        public List<Line> GetLines(PushDirection facingDirection)
+        {
+            var lines = new List<Line>();
+
+            foreach (var part in Parts)
+                lines.AddRange(Helper.GetPartLines(part, facingDirection));
+
+            return lines;
+        }
+
+        public List<Line> GetOffsetLines(double spacing, PushDirection facingDirection)
+        {
+            var lines = new List<Line>();
+
+            foreach (var part in Parts)
+                lines.AddRange(Helper.GetOffsetPartLines(part, spacing, facingDirection));
+
+            return lines;
+        }
+
+        public Pattern Clone(Vector offset)
+        {
+            var pattern = new Pattern();
+
+            foreach (var part in Parts)
+            {
+                var clone = (Part)part.Clone();
+                clone.Offset(offset);
+                pattern.Parts.Add(clone);
+            }
+
+            pattern.UpdateBounds();
+            return pattern;
+        }
+    }
+}