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Blocks now stored in an unordered_map (hash based) rather than a map.

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This commit is contained in:
David Williams 2014-09-18 23:35:16 +02:00
parent 2602b00103
commit 3a08487dc2
2 changed files with 17 additions and 18 deletions
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21
library/PolyVoxCore/include/PolyVoxCore/LargeVolume.h
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@ -33,6 +33,7 @@ freely, subject to the following restrictions:
#include <limits>
#include <cstdlib> //For abort()
#include <cstring> //For memcpy
#include <unordered_map>
#include <list>
#include <map>
#include <memory>
@ -284,24 +285,8 @@ namespace PolyVox
private:
struct BlockPositionCompare
{
bool operator() (const PolyVox::Vector3DInt32& a, const PolyVox::Vector3DInt32& b) const
{
const uint32_t size = 3;
for(uint32_t ct = 0; ct < size; ++ct)
{
if (a.getElement(ct) < b.getElement(ct))
return true;
if (b.getElement(ct) < a.getElement(ct))
return false;
}
return false;
}
};
typedef std::map<Vector3DInt32, std::shared_ptr< UncompressedBlock<VoxelType> >, BlockPositionCompare> SharedPtrBlockMap;
typedef std::map<Vector3DInt32, std::weak_ptr< UncompressedBlock<VoxelType> >, BlockPositionCompare> WeakPtrBlockMap;
typedef std::unordered_map<Vector3DInt32, std::shared_ptr< UncompressedBlock<VoxelType> > > SharedPtrBlockMap;
typedef std::unordered_map<Vector3DInt32, std::weak_ptr< UncompressedBlock<VoxelType> > > WeakPtrBlockMap;
void initialise();

14
library/PolyVoxCore/include/PolyVoxCore/Vector.h
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@ -31,6 +31,7 @@ freely, subject to the following restrictions:
#include <cmath>
#include <cstring>
#include <functional>
#include <iostream>
namespace PolyVox
@ -228,6 +229,19 @@ namespace PolyVox
}//namespace PolyVox
namespace std
{
template <>
struct hash<PolyVox::Vector3DInt32>
{
std::size_t operator()(const PolyVox::Vector3DInt32& vec) const
{
return ((vec.getX() & 0xFF)) | ((vec.getY() & 0xFF) << 8) | ((vec.getZ() & 0xFF) << 16);
}
};
}
#include "PolyVoxCore/Vector.inl"
#endif