Codechange: Make a k-d tree index of towns

1 files changed, 20 insertions, 0 deletions

diff --git a/src/town_kdtree.h b/src/town_kdtree.h
new file mode 100644
index 000000000..ae6b9e4ea
--- /dev/null
+++ b/src/town_kdtree.h
@@ -0,0 +1,20 @@
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file town_kdtree.h Declarations for accessing the k-d tree of towns */
+
+#ifndef TOWN_KDTREE_H
+#define TOWN_KDTREE_H
+
+#include "core/kdtree.hpp"
+#include "town.h"
+
+inline uint16 Kdtree_TownXYFunc(TownID tid, int dim) { return (dim == 0) ? TileX(Town::Get(tid)->xy) : TileY(Town::Get(tid)->xy); }
+typedef Kdtree<TownID, decltype(&Kdtree_TownXYFunc), uint16, int> TownKdtree;
+extern TownKdtree _town_kdtree;
+
+#endif