From 4f387fdf1cf99629fc0177b5a1fa79381db57eff Mon Sep 17 00:00:00 2001
From: bzzt <bzzt@bzzt.bzzt>
Date: Wed, 20 Feb 2019 13:37:00 +0000
Subject: [PATCH] Prune empty quad tree nodes

---
 components/terrain/quadtreeworld.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/components/terrain/quadtreeworld.cpp b/components/terrain/quadtreeworld.cpp
index 6ec89721ad..0c99ca66d9 100644
--- a/components/terrain/quadtreeworld.cpp
+++ b/components/terrain/quadtreeworld.cpp
@@ -163,7 +163,10 @@ public:
                 boundingBox.expandBy(child->getBoundingBox());
         }
 
-        parent->setBoundingBox(boundingBox);
+        if (!boundingBox.valid())
+            parent->removeChildren(0, 4);
+        else
+            parent->setBoundingBox(boundingBox);
     }
 
     QuadTreeNode* addChild(QuadTreeNode* parent, ChildDirection direction, float size)