From d228b6b81296a649de8527c65673da462b723909 Mon Sep 17 00:00:00 2001
From: AJ Isaacs <ajisaacs27@gmail.com>
Date: Mon, 20 Apr 2026 09:20:33 -0400
Subject: [PATCH] refactor(engine): share MBR between PartClassifier and
 CanonicalAngle

---
 OpenNest.Engine/PartClassifier.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/OpenNest.Engine/PartClassifier.cs b/OpenNest.Engine/PartClassifier.cs
index f53f4ab..e0ceef7 100644
--- a/OpenNest.Engine/PartClassifier.cs
+++ b/OpenNest.Engine/PartClassifier.cs
@@ -64,8 +64,8 @@ namespace OpenNest.Engine
             var mbrArea = mbr.Area;
             var mbrPerimeter = 2 * (mbr.Width + mbr.Height);
 
-            // Store primary angle (negated to align MBR with axes, same as RotationAnalysis).
-            result.PrimaryAngle = -mbr.Angle;
+            // Share the single angle formula with CanonicalAngle (no duplicate MBR compute).
+            result.PrimaryAngle = CanonicalAngle.FromMbr(mbr);
 
             // Drawing perimeter for circularity and perimeter ratio.
             var drawingPerimeter = polygon.Perimeter();