1 /*
2 * This file is part of OpenTTD.
3 * 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.
4 * 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.
5 * 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/>.
6 */
7
8 /** @file station_kdtree.h Declarations for accessing the k-d tree of stations */
9
10 #ifndef STATION_KDTREE_H
11 #define STATION_KDTREE_H
12
13 #include "core/kdtree.hpp"
14 #include "core/math_func.hpp"
15 #include "station_base.h"
16 #include "map_func.h"
17
Kdtree_StationXYFunc(StationID stid,int dim)18 inline uint16 Kdtree_StationXYFunc(StationID stid, int dim) { return (dim == 0) ? TileX(BaseStation::Get(stid)->xy) : TileY(BaseStation::Get(stid)->xy); }
19 typedef Kdtree<StationID, decltype(&Kdtree_StationXYFunc), uint16, int> StationKdtree;
20 extern StationKdtree _station_kdtree;
21
22 /**
23 * Call a function on all stations whose sign is within a radius of a center tile.
24 * @param center Central tile to search around.
25 * @param radius Distance in both X and Y to search within.
26 * @param func The function to call, must take a single parameter which is Station*.
27 */
28 template <typename Func>
ForAllStationsRadius(TileIndex center,uint radius,Func func)29 void ForAllStationsRadius(TileIndex center, uint radius, Func func)
30 {
31 uint16 x1, y1, x2, y2;
32 x1 = (uint16)std::max<int>(0, TileX(center) - radius);
33 x2 = (uint16)std::min<int>(TileX(center) + radius + 1, MapSizeX());
34 y1 = (uint16)std::max<int>(0, TileY(center) - radius);
35 y2 = (uint16)std::min<int>(TileY(center) + radius + 1, MapSizeY());
36
37 _station_kdtree.FindContained(x1, y1, x2, y2, [&](StationID id) {
38 func(Station::Get(id));
39 });
40 }
41
42 #endif
43