From 17d0f40e1cb1f49c1130bc3359f1cc9731e1a0fb Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Fri, 12 Feb 2021 11:27:13 +0100
Subject: [PATCH] Add automatic navmesh update when editing spline with
 navmesh-relevant collider

---
 Source/Editor/SceneGraph/Actors/SplineNode.cs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Source/Editor/SceneGraph/Actors/SplineNode.cs b/Source/Editor/SceneGraph/Actors/SplineNode.cs
index 9ce64efa9..a9dec21b6 100644
--- a/Source/Editor/SceneGraph/Actors/SplineNode.cs
+++ b/Source/Editor/SceneGraph/Actors/SplineNode.cs
@@ -46,6 +46,7 @@ namespace FlaxEditor.SceneGraph.Actors
                 {
                     var actor = (Spline)_node.Actor;
                     actor.SetSplineTransform(Index, value);
+                    OnSplineEdited(actor);
                 }
             }
 
@@ -111,6 +112,7 @@ namespace FlaxEditor.SceneGraph.Actors
                 {
                     var spline = Object.Find<Spline>(ref SplineId);
                     sceneModule.MarkSceneEdited(spline.Scene);
+                    OnSplineEdited(spline);
                 }
             }
 
@@ -142,6 +144,7 @@ namespace FlaxEditor.SceneGraph.Actors
                 undoAction = action;
                 var splineNode = (SplineNode)SceneGraphFactory.FindNode(action.SplineId);
                 splineNode.OnUpdate();
+                OnSplineEdited(actor);
                 return splineNode.ActorChildNodes[newIndex];
             }
 
@@ -194,6 +197,7 @@ namespace FlaxEditor.SceneGraph.Actors
                 if (splineNode == null)
                     return null;
                 splineNode.OnUpdate();
+                OnSplineEdited(spline);
                 return splineNode.ActorChildNodes[data.Index];
             }
         }
@@ -333,6 +337,19 @@ namespace FlaxEditor.SceneGraph.Actors
             Editor.Instance.SceneEditing.Spawn(actor, Actor);
         }
 
+        private static void OnSplineEdited(Spline spline)
+        {
+            var collider = spline.GetChild<SplineCollider>();
+            if (collider && collider.Scene && collider.IsActiveInHierarchy && collider.HasStaticFlag(StaticFlags.Navigation) && !Editor.IsPlayMode)
+            {
+                var options = Editor.Instance.Options.Options.General;
+                if (options.AutoRebuildNavMesh)
+                {
+                    Navigation.BuildNavMesh(collider.Scene, collider.Box, options.AutoRebuildNavMeshTimeoutMs);
+                }
+            }
+        }
+
         /// <inheritdoc />
         public override void OnDispose()
         {