From 92d2d6d2bc09cf420e2a9d1fe95a20ba06f16863 Mon Sep 17 00:00:00 2001
From: AJ Isaacs <ajisaacs27@gmail.com>
Date: Tue, 17 Mar 2026 08:02:18 -0400
Subject: [PATCH] feat(core): add RightTriangleShape

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 OpenNest.Core/Shapes/RightTriangleShape.cs    | 23 ++++++++++++++++
 .../Shapes/RightTriangleShapeTests.cs         | 26 +++++++++++++++++++
 2 files changed, 49 insertions(+)
 create mode 100644 OpenNest.Core/Shapes/RightTriangleShape.cs
 create mode 100644 OpenNest.Tests/Shapes/RightTriangleShapeTests.cs

diff --git a/OpenNest.Core/Shapes/RightTriangleShape.cs b/OpenNest.Core/Shapes/RightTriangleShape.cs
new file mode 100644
index 0000000..e7549ca
--- /dev/null
+++ b/OpenNest.Core/Shapes/RightTriangleShape.cs
@@ -0,0 +1,23 @@
+using System.Collections.Generic;
+using OpenNest.Geometry;
+
+namespace OpenNest.Shapes
+{
+    public class RightTriangleShape : ShapeDefinition
+    {
+        public double Width { get; set; }
+        public double Height { get; set; }
+
+        public override Drawing GetDrawing()
+        {
+            var entities = new List<Entity>
+            {
+                new Line(0, 0, Width, 0),
+                new Line(Width, 0, 0, Height),
+                new Line(0, Height, 0, 0)
+            };
+
+            return CreateDrawing(entities);
+        }
+    }
+}
diff --git a/OpenNest.Tests/Shapes/RightTriangleShapeTests.cs b/OpenNest.Tests/Shapes/RightTriangleShapeTests.cs
new file mode 100644
index 0000000..e11e46a
--- /dev/null
+++ b/OpenNest.Tests/Shapes/RightTriangleShapeTests.cs
@@ -0,0 +1,26 @@
+using OpenNest.Shapes;
+
+namespace OpenNest.Tests.Shapes;
+
+public class RightTriangleShapeTests
+{
+    [Fact]
+    public void GetDrawing_BoundingBoxMatchesDimensions()
+    {
+        var shape = new RightTriangleShape { Width = 12, Height = 8 };
+        var drawing = shape.GetDrawing();
+
+        var bbox = drawing.Program.BoundingBox();
+        Assert.Equal(12, bbox.Width, 0.01);
+        Assert.Equal(8, bbox.Length, 0.01);
+    }
+
+    [Fact]
+    public void GetDrawing_AreaIsHalfWidthTimesHeight()
+    {
+        var shape = new RightTriangleShape { Width = 12, Height = 8 };
+        var drawing = shape.GetDrawing();
+
+        Assert.Equal(48, drawing.Area, 0.5);
+    }
+}