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43 lines
1.8 KiB
C++
43 lines
1.8 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file station_kdtree.h Declarations for accessing the k-d tree of stations */
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#ifndef STATION_KDTREE_H
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#define STATION_KDTREE_H
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#include "core/kdtree.hpp"
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#include "core/math_func.hpp"
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#include "station_base.h"
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#include "map_func.h"
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inline uint32_t Kdtree_StationXYFunc(StationID stid, int dim) { return (dim == 0) ? TileX(BaseStation::Get(stid)->xy) : TileY(BaseStation::Get(stid)->xy); }
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typedef Kdtree<StationID, decltype(&Kdtree_StationXYFunc), uint32_t, int> StationKdtree;
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extern StationKdtree _station_kdtree;
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/**
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* Call a function on all stations whose sign is within a radius of a center tile.
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* @param center Central tile to search around.
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* @param radius Distance in both X and Y to search within.
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* @param func The function to call, must take a single parameter which is Station*.
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*/
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template <typename Func>
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void ForAllStationsRadius(TileIndex center, uint radius, Func func)
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{
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uint32_t x1, y1, x2, y2;
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x1 = (uint32_t)std::max<int>(0, TileX(center) - radius);
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x2 = (uint32_t)std::min<int>(TileX(center) + radius + 1, MapSizeX());
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y1 = (uint32_t)std::max<int>(0, TileY(center) - radius);
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y2 = (uint32_t)std::min<int>(TileY(center) + radius + 1, MapSizeY());
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_station_kdtree.FindContained(x1, y1, x2, y2, [&](StationID id) {
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func(Station::Get(id));
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});
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}
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#endif
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