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92 lines
3.0 KiB
C++
92 lines
3.0 KiB
C++
/*
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* RmgArea.h, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#pragma once
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#include "../GameConstants.h"
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#include "../int3.h"
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VCMI_LIB_NAMESPACE_BEGIN
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namespace rmg
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{
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static const std::array<int3, 4> dirs4 = { int3(0,1,0),int3(0,-1,0),int3(-1,0,0),int3(+1,0,0) };
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static const std::array<int3, 4> dirsDiagonal= { int3(1,1,0),int3(1,-1,0),int3(-1,1,0),int3(-1,-1,0) };
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using Tileset = std::unordered_set<int3>;
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using DistanceMap = std::map<int3, int>;
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void toAbsolute(Tileset & tiles, const int3 & position);
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void toRelative(Tileset & tiles, const int3 & position);
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class DLL_LINKAGE Area
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{
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public:
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Area() = default;
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Area(const Area &);
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Area(Area &&) noexcept;
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Area(Tileset tiles);
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Area(Tileset relative, const int3 & position); //create from relative positions
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Area & operator= (const Area &);
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const Tileset & getTiles() const;
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const std::vector<int3> & getTilesVector() const;
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const Tileset & getBorder() const; //lazy cache invalidation
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const Tileset & getBorderOutside() const; //lazy cache invalidation
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DistanceMap computeDistanceMap(std::map<int, Tileset> & reverseDistanceMap) const;
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Area getSubarea(const std::function<bool(const int3 &)> & filter) const;
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bool connected(bool noDiagonals = false) const; //is connected
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bool empty() const;
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bool contains(const int3 & tile) const;
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bool contains(const std::vector<int3> & tiles) const;
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bool contains(const Area & area) const;
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bool overlap(const Area & area) const;
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bool overlap(const std::vector<int3> & tiles) const;
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int distanceSqr(const int3 & tile) const;
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int distanceSqr(const Area & area) const;
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int3 nearest(const int3 & tile) const;
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int3 nearest(const Area & area) const;
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void clear();
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void assign(const Tileset tiles); //do not use reference to allow assigment of cached data
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void add(const int3 & tile);
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void erase(const int3 & tile);
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void unite(const Area & area);
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void intersect(const Area & area);
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void subtract(const Area & area);
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void translate(const int3 & shift);
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void erase_if(std::function<bool(const int3&)> predicate);
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friend Area operator+ (const Area & l, const int3 & r); //translation
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friend Area operator- (const Area & l, const int3 & r); //translation
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friend Area operator+ (const Area & l, const Area & r); //union
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friend Area operator* (const Area & l, const Area & r); //intersection
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friend Area operator- (const Area & l, const Area & r); //AreaL reduced by tiles from AreaR
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friend bool operator== (const Area & l, const Area & r);
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friend std::list<Area> connectedAreas(const Area & area, bool disableDiagonalConnections);
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private:
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void invalidate();
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void computeBorderCache();
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void computeBorderOutsideCache();
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mutable Tileset dTiles;
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mutable std::vector<int3> dTilesVectorCache;
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mutable Tileset dBorderCache;
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mutable Tileset dBorderOutsideCache;
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mutable int3 dTotalShiftCache;
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};
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}
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VCMI_LIB_NAMESPACE_END
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