From 821ba0ec3b097e11da4164ab3f10be296e464506 Mon Sep 17 00:00:00 2001
From: Wojciech Figat <wojtek@figat.pl>
Date: Tue, 14 Dec 2021 17:00:13 +0100
Subject: [PATCH] Add `Rectangle.Distance` for distance between rectangle and a
 point

---
 Source/Engine/Core/Math/Rectangle.cs | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/Source/Engine/Core/Math/Rectangle.cs b/Source/Engine/Core/Math/Rectangle.cs
index bb085ef6a..15810d66e 100644
--- a/Source/Engine/Core/Math/Rectangle.cs
+++ b/Source/Engine/Core/Math/Rectangle.cs
@@ -284,16 +284,30 @@ namespace FlaxEngine
             Vector2 toExpand = Size * (scale - 1.0f) * 0.5f;
             return new Rectangle(Location - toExpand * 0.5f, Size + toExpand);
         }
-        
+
         /// <summary>
         /// Computed nearest distance between 2 rectangles.
         /// </summary>
-        /// <param name="a">Firat rectangle</param>
+        /// <param name="a">First rectangle</param>
         /// <param name="b">Second rectangle</param>
         /// <returns>Resulting distance, 0 if overlapping</returns>
         public static float Distance(Rectangle a, Rectangle b)
         {
-             return Vector2.Max(Vector2.Zero, Vector2.Abs(a.Center - b.Center) - ((a.Size + b.Size) * 0.5f)).Length;
+            return Vector2.Max(Vector2.Zero, Vector2.Abs(a.Center - b.Center) - ((a.Size + b.Size) * 0.5f)).Length;
+        }
+
+        /// <summary>
+        /// Computed distance between rectangle and the point.
+        /// </summary>
+        /// <param name="rect">The rectangle.</param>
+        /// <param name="p">The point.</param>
+        /// <returns>The resulting distance, 0 if point is inside the rectangle.</returns>
+        public static float Distance(Rectangle rect, Vector2 p)
+        {
+            var max = rect.Location + rect.Size;
+            var dx = Mathf.Max(Mathf.Max(rect.Location.X - p.X, p.X - max.X), 0);
+            var dy = Mathf.Max(Math.Max(rect.Location.Y - p.Y, p.Y - max.Y), 0);
+            return Mathf.Sqrt(dx * dx + dy * dy);
         }
 
         /// <summary>