From 97b9eb6c1b2d92a353068ad025cd910b6c87deef Mon Sep 17 00:00:00 2001
From: Gandifil <gandifilmk@gmail.com>
Date: Fri, 1 Dec 2023 23:49:43 +0300
Subject: [PATCH] Add method for set default layer

---
 .../CollisionComponent.cs                        | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/cs/MonoGame.Extended.Collisions/CollisionComponent.cs b/src/cs/MonoGame.Extended.Collisions/CollisionComponent.cs
index 349acf8e..e89fa91f 100644
--- a/src/cs/MonoGame.Extended.Collisions/CollisionComponent.cs
+++ b/src/cs/MonoGame.Extended.Collisions/CollisionComponent.cs
@@ -32,9 +32,21 @@ namespace MonoGame.Extended.Collisions
         /// <param name="boundary">Boundary of the collision tree.</param>
         public CollisionComponent(RectangleF boundary)
         {
-            var layer = new Layer(new QuadTreeSpace(boundary));
+            SetDefaultLayer(new Layer(new QuadTreeSpace(boundary)));
+        }
+
+        /// <summary>
+        /// The main layer has the name from <see cref="DEFAULT_LAYER_NAME"/>.
+        /// The main layer collision with itself and all other layers.
+        /// </summary>
+        /// <param name="layer">Layer to set default</param>
+        public void SetDefaultLayer(Layer layer)
+        {
+            if (_layers.ContainsKey(DEFAULT_LAYER_NAME))
+                Remove(DEFAULT_LAYER_NAME);
             Add(DEFAULT_LAYER_NAME, layer);
-            AddCollisionBetweenLayer(layer, layer);
+            foreach (var otherLayer in _layers.Values)
+                AddCollisionBetweenLayer(layer, otherLayer);
         }
 
         /// <summary>