From 5fcf9db59cf0f8c26acf9be4e29bb20187720b02 Mon Sep 17 00:00:00 2001
From: Jarrod Doyle <thejarroddoyle@gmail.com>
Date: Sun, 6 Oct 2024 10:55:56 +0100
Subject: [PATCH] Add sphere to sphere intersection test

---
 KeepersCompound.Lightmapper/MathUtils.cs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/KeepersCompound.Lightmapper/MathUtils.cs b/KeepersCompound.Lightmapper/MathUtils.cs
index 13a418a..4a82249 100644
--- a/KeepersCompound.Lightmapper/MathUtils.cs
+++ b/KeepersCompound.Lightmapper/MathUtils.cs
@@ -49,6 +49,12 @@ public static class MathUtils
         return d2 < r2;
     }
 
+    public static bool Intersects(Sphere sphere, Sphere other)
+    {
+        var rsum = sphere.Radius + other.Radius;
+        return (sphere.Position - other.Position).Length() <= rsum;
+    }
+
     public static float DistanceFromPlane(Plane plane, Vector3 point)
     {
         return Math.Abs(Vector3.Dot(plane.Normal, point) + plane.D) / plane.Normal.Length();