From e28ea6cab1f19fb8c52e3e4b8e1eff867196f511 Mon Sep 17 00:00:00 2001
From: Kawe Mazidjatari <48657826+Mauler125@users.noreply.github.com>
Date: Mon, 8 Jul 2024 15:57:06 +0200
Subject: [PATCH] Recast: add path compression to disjoint set algorithm

Improve performance for future lookups.
---
 .../recast/Detour/Include/DetourNavMeshBuilder.h     | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/thirdparty/recast/Detour/Include/DetourNavMeshBuilder.h b/src/thirdparty/recast/Detour/Include/DetourNavMeshBuilder.h
index 309b6f0f..eb1f5c65 100644
--- a/src/thirdparty/recast/Detour/Include/DetourNavMeshBuilder.h
+++ b/src/thirdparty/recast/Detour/Include/DetourNavMeshBuilder.h
@@ -136,12 +136,14 @@ public:
 
 		return newId;
 	}
-	inline int find(const int id) const
+	int find(const int id) const
 	{
-		if (parent[id] != id)
-			return find(parent[id]);
+		int& parentRef = parent[id];
 
-		return id;
+		if (parentRef != id)
+			parentRef = find(parentRef);
+
+		return parentRef;
 	}
 	void setUnion(const int x, const int y)
 	{
@@ -166,7 +168,7 @@ public:
 
 private:
 	rdIntArray rank;
-	rdIntArray parent;
+	mutable rdIntArray parent;
 };
 
 /// Builds navigation mesh disjoint poly groups from the provided navmesh.