moonfall/Grid.h

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2014-10-21 04:54:42 +00:00
/*
Moonfall Copyright (C) 2008 Alex Yatskov
This program 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, either version 3 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
template <typename T, typename V>
class Grid
{
public:
Grid(int chunkDims = 256);
bool Add(const T& data, const V& id, const Vector2i& position);
bool Remove(const V& id);
bool Update(const V& id, const Vector2i& position);
bool Contains(const V& id) const;
const T* Get(const V& id) const;
T* Get(const V& id);
void Query(std::vector<T>* data, const Rect4i& bounds) const;
void Enumerate(std::vector<T>* data) const;
void Clear();
private:
struct Entry;
typedef qword ChunkKey;
typedef dword ChunkKeyCoord;
typedef std::map<V, boost::shared_ptr<Entry> > DataMap;
typedef std::map<ChunkKey, DataMap> ChunkMap;
ChunkKey PositionToKey(const Vector2i& position) const;
struct Entry
{
Entry (const T& data, const Vector2i& position) :
data(data), position(position) { }
T data;
Vector2i position;
};
ChunkMap m_chunks;
DataMap m_data;
int m_chunkDims;
};
#include "Grid.inl"