From dc97615fd46f40ccf3bcbd86fedfed46d13c7b2f Mon Sep 17 00:00:00 2001
From: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>
Date: Tue, 27 May 2025 19:26:50 +1000
Subject: [PATCH] Add some Box2i methods (#5969)

Equivalent to Box2.
---
 Robust.Shared.Maths/Box2i.cs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Robust.Shared.Maths/Box2i.cs b/Robust.Shared.Maths/Box2i.cs
index 4c1944d50..f0596ed57 100644
--- a/Robust.Shared.Maths/Box2i.cs
+++ b/Robust.Shared.Maths/Box2i.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics.Contracts;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
@@ -101,6 +102,7 @@ namespace Robust.Shared.Maths
         /// <summary>
         ///     Returns the smallest rectangle that contains both of the rectangles.
         /// </summary>
+        [Pure]
         public readonly Box2i Union(in Box2i other)
         {
             var botLeft = Vector2i.ComponentMin(BottomLeft, other.BottomLeft);
@@ -207,6 +209,7 @@ namespace Robust.Shared.Maths
         /// <summary>
         /// Multiplies each side of the box by the scalar.
         /// </summary>
+        [Pure]
         public Box2i Scale(int scalar)
         {
             return new Box2i(
@@ -215,6 +218,21 @@ namespace Robust.Shared.Maths
                 Right * scalar,
                 Top * scalar);
         }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        [Pure]
+        public bool Intersects(in Box2i other)
+        {
+            return other.Bottom <= this.Top && other.Top >= this.Bottom && other.Right >= this.Left &&
+                   other.Left <= this.Right;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        [Pure]
+        public readonly Box2i Enlarged(int size)
+        {
+            return new(Left - size, Bottom - size, Right + size, Top + size);
+        }
     }
 
     /// <summary>