607 lines
14 KiB
C++
607 lines
14 KiB
C++
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// ChunkData.cpp
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// Implements the cChunkData class that represents the block's type, meta, blocklight and skylight storage for a chunk
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#include "Globals.h"
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#include "ChunkData.h"
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/** Returns true if all a_Array's elements between [0] and [a_NumElements - 1] are equal to a_Value. */
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template <typename T> inline bool IsAllValue(const T * a_Array, size_t a_NumElements, T a_Value)
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{
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for (size_t i = 0; i < a_NumElements; i++)
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{
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if (a_Array[i] != a_Value)
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{
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return false;
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}
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}
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return true;
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}
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cChunkData::cChunkData(cAllocationPool<cChunkData::sChunkSection> & a_Pool):
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m_Sections(),
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m_Pool(a_Pool)
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{
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}
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cChunkData::cChunkData(cChunkData && a_Other):
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m_Pool(a_Other.m_Pool)
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{
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for (size_t i = 0; i < NumSections; i++)
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{
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m_Sections[i] = a_Other.m_Sections[i];
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a_Other.m_Sections[i] = nullptr;
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}
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}
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cChunkData::~cChunkData()
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{
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Clear();
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}
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void cChunkData::Assign(const cChunkData & a_Other)
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{
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// If assigning to self, no-op
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if (&a_Other == this)
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{
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return;
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}
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Clear();
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for (size_t i = 0; i < NumSections; ++i)
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{
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if (a_Other.m_Sections[i] != nullptr)
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{
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m_Sections[i] = Allocate();
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*m_Sections[i] = *a_Other.m_Sections[i];
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}
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}
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}
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void cChunkData::Assign(cChunkData && a_Other)
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{
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if (&a_Other == this)
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{
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return;
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}
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if (&m_Pool != &a_Other.m_Pool)
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{
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// Cannot transfer the memory, do a copy instead
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const cChunkData & CopyOther = a_Other;
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Assign(CopyOther);
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return;
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}
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Clear();
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for (size_t i = 0; i < NumSections; i++)
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{
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m_Sections[i] = a_Other.m_Sections[i];
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a_Other.m_Sections[i] = nullptr;
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}
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}
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BLOCKTYPE cChunkData::GetBlock(int a_X, int a_Y, int a_Z) const
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{
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if (
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(a_X < 0) || (a_X >= cChunkDef::Width) ||
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(a_Y < 0) || (a_Y >= cChunkDef::Height) ||
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(a_Z < 0) || (a_Z >= cChunkDef::Width)
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)
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{
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return E_BLOCK_AIR; // Coordinates are outside outside the world, so this must be an air block
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}
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int Section = a_Y / SectionHeight;
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if (m_Sections[Section] != nullptr)
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{
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int Index = cChunkDef::MakeIndexNoCheck(a_X, static_cast<int>(static_cast<UInt32>(a_Y) - (static_cast<UInt32>(Section) * SectionHeight)), a_Z);
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return m_Sections[Section]->m_BlockTypes[Index];
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}
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else
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{
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return 0;
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}
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}
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void cChunkData::SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_Block)
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{
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if (
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(a_RelX >= cChunkDef::Width) || (a_RelX < 0) ||
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(a_RelY >= cChunkDef::Height) || (a_RelY < 0) ||
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(a_RelZ >= cChunkDef::Width) || (a_RelZ < 0)
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)
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{
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ASSERT(!"cChunkData::SetMeta(): index out of range!");
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return;
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}
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int Section = static_cast<int>(static_cast<UInt32>(a_RelY) / SectionHeight);
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if (m_Sections[Section] == nullptr)
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{
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if (a_Block == 0x00)
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{
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return;
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}
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m_Sections[Section] = Allocate();
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if (m_Sections[Section] == nullptr)
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{
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ASSERT(!"Failed to allocate a new section in Chunkbuffer");
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return;
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}
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ZeroSection(m_Sections[Section]);
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}
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int Index = cChunkDef::MakeIndexNoCheck(a_RelX, static_cast<int>(static_cast<UInt32>(a_RelY) - (static_cast<UInt32>(Section) * SectionHeight)), a_RelZ);
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m_Sections[Section]->m_BlockTypes[Index] = a_Block;
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}
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NIBBLETYPE cChunkData::GetMeta(int a_RelX, int a_RelY, int a_RelZ) const
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{
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if (
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(a_RelX < cChunkDef::Width) && (a_RelX > -1) &&
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(a_RelY < cChunkDef::Height) && (a_RelY > -1) &&
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(a_RelZ < cChunkDef::Width) && (a_RelZ > -1))
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{
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int Section = static_cast<int>(static_cast<UInt32>(a_RelY) / SectionHeight);
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if (m_Sections[Section] != nullptr)
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{
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int Index = cChunkDef::MakeIndexNoCheck(a_RelX, static_cast<int>(static_cast<UInt32>(a_RelY) - (static_cast<UInt32>(Section) * SectionHeight)), a_RelZ);
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return (m_Sections[Section]->m_BlockMetas[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
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}
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else
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{
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return 0;
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}
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}
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// Coordinates are outside outside the world, so it must be an air block with a blank meta
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return 0;
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}
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bool cChunkData::SetMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Nibble)
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{
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if (
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(a_RelX >= cChunkDef::Width) || (a_RelX < 0) ||
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(a_RelY >= cChunkDef::Height) || (a_RelY < 0) ||
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(a_RelZ >= cChunkDef::Width) || (a_RelZ < 0)
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)
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{
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ASSERT(!"cChunkData::SetMeta(): index out of range!");
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return false;
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}
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int Section = static_cast<int>(static_cast<UInt32>(a_RelY) / SectionHeight);
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if (m_Sections[Section] == nullptr)
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{
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if ((a_Nibble & 0xf) == 0x00)
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{
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return false;
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}
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m_Sections[Section] = Allocate();
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if (m_Sections[Section] == nullptr)
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{
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ASSERT(!"Failed to allocate a new section in Chunkbuffer");
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return false;
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}
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ZeroSection(m_Sections[Section]);
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}
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int Index = cChunkDef::MakeIndexNoCheck(a_RelX, static_cast<int>(static_cast<UInt32>(a_RelY) - (static_cast<UInt32>(Section) * SectionHeight)), a_RelZ);
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NIBBLETYPE oldval = m_Sections[Section]->m_BlockMetas[Index / 2] >> ((Index & 1) * 4) & 0xf;
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m_Sections[Section]->m_BlockMetas[Index / 2] = static_cast<NIBBLETYPE>(
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(m_Sections[Section]->m_BlockMetas[Index / 2] & (0xf0 >> ((Index & 1) * 4))) | // The untouched nibble
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((a_Nibble & 0x0f) << ((Index & 1) * 4)) // The nibble being set
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);
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return oldval != a_Nibble;
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}
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NIBBLETYPE cChunkData::GetBlockLight(int a_RelX, int a_RelY, int a_RelZ) const
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{
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if (
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(a_RelX < cChunkDef::Width) && (a_RelX > -1) &&
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(a_RelY < cChunkDef::Height) && (a_RelY > -1) &&
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(a_RelZ < cChunkDef::Width) && (a_RelZ > -1)
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)
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{
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int Section = static_cast<int>(static_cast<UInt32>(a_RelY) / SectionHeight);
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if (m_Sections[Section] != nullptr)
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{
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int Index = cChunkDef::MakeIndexNoCheck(a_RelX, static_cast<int>(static_cast<UInt32>(a_RelY) - (static_cast<UInt32>(Section) * SectionHeight)), a_RelZ);
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return (m_Sections[Section]->m_BlockLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
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}
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else
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{
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return 0;
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}
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}
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ASSERT(!"cChunkData::GetMeta(): coords out of chunk range!");
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return 0;
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}
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NIBBLETYPE cChunkData::GetSkyLight(int a_RelX, int a_RelY, int a_RelZ) const
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{
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if ((a_RelX < cChunkDef::Width) && (a_RelX > -1) && (a_RelY < cChunkDef::Height) && (a_RelY > -1) && (a_RelZ < cChunkDef::Width) && (a_RelZ > -1))
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{
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int Section = static_cast<int>(static_cast<UInt32>(a_RelY) / SectionHeight);
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if (m_Sections[Section] != nullptr)
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{
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int Index = cChunkDef::MakeIndexNoCheck(a_RelX, static_cast<int>(static_cast<UInt32>(a_RelY) - (static_cast<UInt32>(Section) * SectionHeight)), a_RelZ);
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return (m_Sections[Section]->m_BlockSkyLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
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}
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else
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{
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return 0xF;
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}
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}
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ASSERT(!"cChunkData::GetMeta(): coords out of chunk range!");
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return 0;
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}
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const cChunkData::sChunkSection * cChunkData::GetSection(size_t a_SectionNum) const
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{
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if (a_SectionNum < NumSections)
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{
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return m_Sections[a_SectionNum];
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}
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ASSERT(!"cChunkData::GetSection: section index out of range");
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return nullptr;
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}
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UInt16 cChunkData::GetSectionBitmask() const
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{
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static_assert(NumSections <= 16U, "cChunkData::GetSectionBitmask needs a bigger data type");
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UInt16 Res = 0U;
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for (size_t i = 0U; i < NumSections; ++i)
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{
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Res |= ((m_Sections[i] != nullptr) << i);
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}
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return Res;
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}
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void cChunkData::Clear()
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{
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for (size_t i = 0; i < NumSections; ++i)
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{
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if (m_Sections[i] != nullptr)
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{
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Free(m_Sections[i]);
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m_Sections[i] = nullptr;
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}
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}
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}
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void cChunkData::CopyBlockTypes(BLOCKTYPE * a_Dest, size_t a_Idx, size_t a_Length) const
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{
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size_t ToSkip = a_Idx;
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for (size_t i = 0; i < NumSections; i++)
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{
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size_t StartPos = 0;
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if (ToSkip > 0)
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{
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StartPos = std::min(ToSkip, +SectionBlockCount);
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ToSkip -= StartPos;
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}
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if (StartPos < SectionBlockCount)
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{
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size_t ToCopy = std::min(+SectionBlockCount - StartPos, a_Length);
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a_Length -= ToCopy;
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if (m_Sections[i] != nullptr)
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{
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BLOCKTYPE * blockbuffer = m_Sections[i]->m_BlockTypes;
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memcpy(&a_Dest[(i * SectionBlockCount) + StartPos - a_Idx], blockbuffer + StartPos, sizeof(BLOCKTYPE) * ToCopy);
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}
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else
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{
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memset(&a_Dest[(i * SectionBlockCount) + StartPos - a_Idx], 0, sizeof(BLOCKTYPE) * ToCopy);
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}
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}
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}
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}
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void cChunkData::CopyMetas(NIBBLETYPE * a_Dest) const
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{
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for (size_t i = 0; i < NumSections; i++)
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{
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if (m_Sections[i] != nullptr)
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{
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memcpy(&a_Dest[i * SectionBlockCount / 2], &m_Sections[i]->m_BlockMetas, sizeof(m_Sections[i]->m_BlockMetas));
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}
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else
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{
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memset(&a_Dest[i * SectionBlockCount / 2], 0, sizeof(m_Sections[i]->m_BlockMetas));
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}
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}
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}
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void cChunkData::CopyBlockLight(NIBBLETYPE * a_Dest) const
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{
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for (size_t i = 0; i < NumSections; i++)
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{
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if (m_Sections[i] != nullptr)
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{
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memcpy(&a_Dest[i * SectionBlockCount / 2], &m_Sections[i]->m_BlockLight, sizeof(m_Sections[i]->m_BlockLight));
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}
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else
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{
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memset(&a_Dest[i * SectionBlockCount / 2], 0, sizeof(m_Sections[i]->m_BlockLight));
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}
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}
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}
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void cChunkData::CopySkyLight(NIBBLETYPE * a_Dest) const
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{
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for (size_t i = 0; i < NumSections; i++)
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{
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if (m_Sections[i] != nullptr)
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{
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memcpy(&a_Dest[i * SectionBlockCount / 2], &m_Sections[i]->m_BlockSkyLight, sizeof(m_Sections[i]->m_BlockSkyLight));
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}
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else
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{
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memset(&a_Dest[i * SectionBlockCount / 2], 0xff, sizeof(m_Sections[i]->m_BlockSkyLight));
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}
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}
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}
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void cChunkData::SetBlockTypes(const BLOCKTYPE * a_Src)
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{
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ASSERT(a_Src != nullptr);
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for (size_t i = 0; i < NumSections; i++)
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{
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// If the section is already allocated, copy the data into it:
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if (m_Sections[i] != nullptr)
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{
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memcpy(m_Sections[i]->m_BlockTypes, &a_Src[i * SectionBlockCount], sizeof(m_Sections[i]->m_BlockTypes));
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continue;
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}
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// The section doesn't exist, find out if it is needed:
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if (IsAllValue(a_Src + i * SectionBlockCount, SectionBlockCount, static_cast<BLOCKTYPE>(0)))
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{
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// No need for the section, the data is all-air
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continue;
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}
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// Allocate the section and copy the data into it:
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m_Sections[i] = Allocate();
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memcpy(m_Sections[i]->m_BlockTypes, &a_Src[i * SectionBlockCount], sizeof(m_Sections[i]->m_BlockTypes));
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memset(m_Sections[i]->m_BlockMetas, 0x00, sizeof(m_Sections[i]->m_BlockMetas));
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memset(m_Sections[i]->m_BlockLight, 0x00, sizeof(m_Sections[i]->m_BlockLight));
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memset(m_Sections[i]->m_BlockSkyLight, 0xff, sizeof(m_Sections[i]->m_BlockSkyLight));
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} // for i - m_Sections[]
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}
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void cChunkData::SetMetas(const NIBBLETYPE * a_Src)
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{
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ASSERT(a_Src != nullptr);
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for (size_t i = 0; i < NumSections; i++)
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{
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// If the section is already allocated, copy the data into it:
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if (m_Sections[i] != nullptr)
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{
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memcpy(m_Sections[i]->m_BlockMetas, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockMetas));
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continue;
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}
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// The section doesn't exist, find out if it is needed:
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if (IsAllValue(a_Src + i * SectionBlockCount / 2, SectionBlockCount / 2, static_cast<NIBBLETYPE>(0)))
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{
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// No need for the section, the data is all zeroes
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continue;
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}
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// Allocate the section and copy the data into it:
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m_Sections[i] = Allocate();
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memcpy(m_Sections[i]->m_BlockMetas, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockMetas));
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memset(m_Sections[i]->m_BlockTypes, 0x00, sizeof(m_Sections[i]->m_BlockTypes));
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memset(m_Sections[i]->m_BlockLight, 0x00, sizeof(m_Sections[i]->m_BlockLight));
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memset(m_Sections[i]->m_BlockSkyLight, 0xff, sizeof(m_Sections[i]->m_BlockSkyLight));
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} // for i - m_Sections[]
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}
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void cChunkData::SetBlockLight(const NIBBLETYPE * a_Src)
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{
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if (a_Src == nullptr)
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{
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return;
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}
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for (size_t i = 0; i < NumSections; i++)
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{
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// If the section is already allocated, copy the data into it:
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if (m_Sections[i] != nullptr)
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{
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memcpy(m_Sections[i]->m_BlockLight, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockLight));
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continue;
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}
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// The section doesn't exist, find out if it is needed:
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if (IsAllValue(a_Src + i * SectionBlockCount / 2, SectionBlockCount / 2, static_cast<NIBBLETYPE>(0)))
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{
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// No need for the section, the data is all zeroes
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continue;
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}
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// Allocate the section and copy the data into it:
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m_Sections[i] = Allocate();
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memcpy(m_Sections[i]->m_BlockLight, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockLight));
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memset(m_Sections[i]->m_BlockTypes, 0x00, sizeof(m_Sections[i]->m_BlockTypes));
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memset(m_Sections[i]->m_BlockMetas, 0x00, sizeof(m_Sections[i]->m_BlockMetas));
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memset(m_Sections[i]->m_BlockSkyLight, 0xff, sizeof(m_Sections[i]->m_BlockSkyLight));
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} // for i - m_Sections[]
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}
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void cChunkData::SetSkyLight(const NIBBLETYPE * a_Src)
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{
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if (a_Src == nullptr)
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{
|
|
return;
|
|
}
|
|
|
|
for (size_t i = 0; i < NumSections; i++)
|
|
{
|
|
// If the section is already allocated, copy the data into it:
|
|
if (m_Sections[i] != nullptr)
|
|
{
|
|
memcpy(m_Sections[i]->m_BlockSkyLight, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockSkyLight));
|
|
continue;
|
|
}
|
|
|
|
// The section doesn't exist, find out if it is needed:
|
|
if (IsAllValue(a_Src + i * SectionBlockCount / 2, SectionBlockCount / 2, static_cast<NIBBLETYPE>(0xff)))
|
|
{
|
|
// No need for the section, the data is all zeroes
|
|
continue;
|
|
}
|
|
|
|
// Allocate the section and copy the data into it:
|
|
m_Sections[i] = Allocate();
|
|
memcpy(m_Sections[i]->m_BlockSkyLight, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockSkyLight));
|
|
memset(m_Sections[i]->m_BlockTypes, 0x00, sizeof(m_Sections[i]->m_BlockTypes));
|
|
memset(m_Sections[i]->m_BlockMetas, 0x00, sizeof(m_Sections[i]->m_BlockMetas));
|
|
memset(m_Sections[i]->m_BlockLight, 0x00, sizeof(m_Sections[i]->m_BlockLight));
|
|
} // for i - m_Sections[]
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
UInt32 cChunkData::NumPresentSections() const
|
|
{
|
|
UInt32 Ret = 0U;
|
|
for (size_t i = 0; i < NumSections; i++)
|
|
{
|
|
if (m_Sections[i] != nullptr)
|
|
{
|
|
++Ret;
|
|
}
|
|
}
|
|
return Ret;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
cChunkData::sChunkSection * cChunkData::Allocate(void)
|
|
{
|
|
return m_Pool.Allocate();
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void cChunkData::Free(cChunkData::sChunkSection * a_Section)
|
|
{
|
|
m_Pool.Free(a_Section);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void cChunkData::ZeroSection(cChunkData::sChunkSection * a_Section) const
|
|
{
|
|
memset(a_Section->m_BlockTypes, 0x00, sizeof(a_Section->m_BlockTypes));
|
|
memset(a_Section->m_BlockMetas, 0x00, sizeof(a_Section->m_BlockMetas));
|
|
memset(a_Section->m_BlockLight, 0x00, sizeof(a_Section->m_BlockLight));
|
|
memset(a_Section->m_BlockSkyLight, 0xff, sizeof(a_Section->m_BlockSkyLight));
|
|
}
|
|
|
|
|
|
|
|
|