mirror of https://github.com/axmolengine/axmol.git
75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
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//
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// Copyright (c) 2009-2010 Mikko Mononen memon@inside.org
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would be
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// appreciated but is not required.
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// 2. Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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// 3. This notice may not be removed or altered from any source distribution.
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//
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#ifndef DETOURPROXIMITYGRID_H
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#define DETOURPROXIMITYGRID_H
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class dtProximityGrid
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{
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float m_cellSize;
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float m_invCellSize;
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struct Item
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{
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unsigned short id;
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short x,y;
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unsigned short next;
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};
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Item* m_pool;
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int m_poolHead;
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int m_poolSize;
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unsigned short* m_buckets;
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int m_bucketsSize;
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int m_bounds[4];
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public:
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dtProximityGrid();
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~dtProximityGrid();
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bool init(const int poolSize, const float cellSize);
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void clear();
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void addItem(const unsigned short id,
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const float minx, const float miny,
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const float maxx, const float maxy);
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int queryItems(const float minx, const float miny,
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const float maxx, const float maxy,
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unsigned short* ids, const int maxIds) const;
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int getItemCountAt(const int x, const int y) const;
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inline const int* getBounds() const { return m_bounds; }
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inline float getCellSize() const { return m_cellSize; }
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private:
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// Explicitly disabled copy constructor and copy assignment operator.
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dtProximityGrid(const dtProximityGrid&);
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dtProximityGrid& operator=(const dtProximityGrid&);
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};
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dtProximityGrid* dtAllocProximityGrid();
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void dtFreeProximityGrid(dtProximityGrid* ptr);
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#endif // DETOURPROXIMITYGRID_H
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