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// ChunkData.h
// Declares the cChunkData class that represents the block's type, meta, blocklight and skylight storage for a chunk
#pragma once
#include <cstring>
#include "ChunkDef.h"
#if __cplusplus < 201103L
// auto_ptr style interface for memory management
#else
// unique_ptr style interface for memory management
#endif
class cChunkData
{
public:
cChunkData(void);
~cChunkData();
#if __cplusplus < 201103L
// auto_ptr style interface for memory management
cChunkData(const cChunkData & a_Other);
cChunkData & operator =(const cChunkData & a_Other);
#else
// unique_ptr style interface for memory management
cChunkData(cChunkData && a_Other);
cChunkData & operator =(cChunkData && a_ther);
#endif
BLOCKTYPE GetBlock(int a_X, int a_Y, int a_Z) const;
void SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_Block);
NIBBLETYPE GetMeta(int a_RelX, int a_RelY, int a_RelZ) const;
bool SetMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Nibble);
NIBBLETYPE GetBlockLight(int a_RelX, int a_RelY, int a_RelZ) const;
NIBBLETYPE GetSkyLight(int a_RelX, int a_RelY, int a_RelZ) const;
/** Creates a (deep) copy of self. */
cChunkData Copy(void) const;
/** Copies the blocktype data into the specified flat array.
Optionally, only a part of the data is copied, as specified by the a_Idx and a_Length parameters. */
void CopyBlockTypes(BLOCKTYPE * a_Dest, size_t a_Idx = 0, size_t a_Length = cChunkDef::NumBlocks) const;
/** Copies the metadata into the specified flat array. */
void CopyMetas(NIBBLETYPE * a_Dest) const;
/** Copies the block light data into the specified flat array. */
void CopyBlockLight(NIBBLETYPE * a_Dest) const;
/** Copies the skylight data into the specified flat array. */
void CopySkyLight (NIBBLETYPE * a_Dest) const;
/** Copies the blocktype data from the specified flat array into the internal representation.
Allocates sections that are needed for the operation.
Requires that a_Src is a valid pointer. */
void SetBlockTypes(const BLOCKTYPE * a_Src);
/** Copies the metadata from the specified flat array into the internal representation.
Allocates sectios that are needed for the operation.
Requires that a_Src is a valid pointer. */
void SetMetas(const NIBBLETYPE * a_Src);
/** Copies the blocklight data from the specified flat array into the internal representation.
Allocates sectios that are needed for the operation.
Allows a_Src to be NULL, in which case it doesn't do anything. */
void SetBlockLight(const NIBBLETYPE * a_Src);
/** Copies the skylight data from the specified flat array into the internal representation.
Allocates sectios that are needed for the operation.
Allows a_Src to be NULL, in which case it doesn't do anything. */
void SetSkyLight(const NIBBLETYPE * a_Src);
private:
static const size_t SectionHeight = 16;
static const size_t NumSections = (cChunkDef::Height / SectionHeight);
static const size_t SectionBlockCount = SectionHeight * cChunkDef::Width * cChunkDef::Width;
#if __cplusplus < 201103L
// auto_ptr style interface for memory management
mutable bool m_IsOwner;
#endif
struct sChunkSection {
BLOCKTYPE m_BlockTypes [SectionBlockCount];
NIBBLETYPE m_BlockMetas [SectionBlockCount / 2];
NIBBLETYPE m_BlockLight [SectionBlockCount / 2];
NIBBLETYPE m_BlockSkyLight[SectionBlockCount / 2];
};
sChunkSection * m_Sections[NumSections];
/** Allocates a new section. Entry-point to custom allocators. */
static sChunkSection * Allocate(void);
/** Frees the specified section, previously allocated using Allocate().
Note that a_Section may be NULL. */
static void Free(sChunkSection * a_Section);
/** Sets the data in the specified section to their default values. */
void ZeroSection(sChunkSection * a_Section) const;
};
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