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-rw-r--r--src/ChunkData.cpp592
1 files changed, 592 insertions, 0 deletions
diff --git a/src/ChunkData.cpp b/src/ChunkData.cpp
new file mode 100644
index 000000000..1fa2fd212
--- /dev/null
+++ b/src/ChunkData.cpp
@@ -0,0 +1,592 @@
+
+// ChunkData.cpp
+
+// Implements the cChunkData class that represents the block's type, meta, blocklight and skylight storage for a chunk
+
+#include "Globals.h"
+#include "ChunkData.h"
+
+
+
+
+
+/** Returns true if all a_Array's elements between [0] and [a_NumElements - 1] are equal to a_Value. */
+template <typename T> inline bool IsAllValue(const T * a_Array, size_t a_NumElements, T a_Value)
+{
+ for (size_t i = 0; i < a_NumElements; i++)
+ {
+ if (a_Array[i] != a_Value)
+ {
+ return false;
+ }
+ }
+ return true;
+}
+
+
+
+
+
+cChunkData::cChunkData(void)
+#if __cplusplus < 201103L
+ // auto_ptr style interface for memory management
+ : m_IsOwner(true)
+#endif
+{
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ m_Sections[i] = NULL;
+ }
+}
+
+
+
+
+
+cChunkData::~cChunkData()
+{
+ #if __cplusplus < 201103L
+ // auto_ptr style interface for memory management
+ if (!m_IsOwner)
+ {
+ return;
+ }
+ #endif
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ Free(m_Sections[i]);
+ m_Sections[i] = NULL;
+ }
+}
+
+
+
+
+
+#if __cplusplus < 201103L
+ // auto_ptr style interface for memory management
+ cChunkData::cChunkData(const cChunkData & a_Other) :
+ m_IsOwner(true)
+ {
+ // Move contents and ownership from a_Other to this, pointer-wise:
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ m_Sections[i] = a_Other.m_Sections[i];
+ }
+ a_Other.m_IsOwner = false;
+ }
+
+
+
+
+
+ cChunkData & cChunkData::operator =(const cChunkData & a_Other)
+ {
+ // If assigning to self, no-op
+ if (&a_Other == this)
+ {
+ return *this;
+ }
+
+ // Free any currently held contents:
+ if (m_IsOwner)
+ {
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ Free(m_Sections[i]);
+ m_Sections[i] = NULL;
+ }
+ }
+
+ // Move contents and ownership from a_Other to this, pointer-wise:
+ m_IsOwner = true;
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ m_Sections[i] = a_Other.m_Sections[i];
+ }
+ a_Other.m_IsOwner = false;
+ return *this;
+ }
+
+#else
+
+ // unique_ptr style interface for memory management
+ cChunkData::cChunkData(cChunkData && other)
+ {
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ m_Sections[i] = other.m_Sections[i];
+ other.m_Sections[i] = NULL;
+ }
+ }
+
+
+
+
+
+ cChunkData & cChunkData::operator =(cChunkData && other)
+ {
+ if (&other != this)
+ {
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ Free(m_Sections[i]);
+ m_Sections[i] = other.m_Sections[i];
+ other.m_Sections[i] = NULL;
+ }
+ }
+ return *this;
+ }
+#endif
+
+
+
+
+
+BLOCKTYPE cChunkData::GetBlock(int a_X, int a_Y, int a_Z) const
+{
+ ASSERT((a_X >= 0) && (a_X < cChunkDef::Width));
+ ASSERT((a_Y >= 0) && (a_Y < cChunkDef::Height));
+ ASSERT((a_Z >= 0) && (a_Z < cChunkDef::Width));
+ int Section = a_Y / SectionHeight;
+ if (m_Sections[Section] != NULL)
+ {
+ int Index = cChunkDef::MakeIndexNoCheck(a_X, a_Y - (Section * SectionHeight), a_Z);
+ return m_Sections[Section]->m_BlockTypes[Index];
+ }
+ else
+ {
+ return 0;
+ }
+}
+
+
+
+
+
+void cChunkData::SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_Block)
+{
+ if (
+ (a_RelX >= cChunkDef::Width) || (a_RelX < 0) ||
+ (a_RelY >= cChunkDef::Height) || (a_RelY < 0) ||
+ (a_RelZ >= cChunkDef::Width) || (a_RelZ < 0)
+ )
+ {
+ ASSERT(!"cChunkData::SetMeta(): index out of range!");
+ return;
+ }
+
+ int Section = a_RelY / SectionHeight;
+ if (m_Sections[Section] == NULL)
+ {
+ if (a_Block == 0x00)
+ {
+ return;
+ }
+ m_Sections[Section] = Allocate();
+ if (m_Sections[Section] == NULL)
+ {
+ ASSERT(!"Failed to allocate a new section in Chunkbuffer");
+ return;
+ }
+ ZeroSection(m_Sections[Section]);
+ }
+ int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * SectionHeight), a_RelZ);
+ m_Sections[Section]->m_BlockTypes[Index] = a_Block;
+}
+
+
+
+
+
+NIBBLETYPE cChunkData::GetMeta(int a_RelX, int a_RelY, int a_RelZ) const
+{
+ if (
+ (a_RelX < cChunkDef::Width) && (a_RelX > -1) &&
+ (a_RelY < cChunkDef::Height) && (a_RelY > -1) &&
+ (a_RelZ < cChunkDef::Width) && (a_RelZ > -1))
+ {
+ int Section = a_RelY / SectionHeight;
+ if (m_Sections[Section] != NULL)
+ {
+ int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * SectionHeight), a_RelZ);
+ return (m_Sections[Section]->m_BlockMetas[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+ }
+ else
+ {
+ return 0;
+ }
+ }
+ ASSERT(!"cChunkData::GetMeta(): coords out of chunk range!");
+ return 0;
+}
+
+
+
+
+
+bool cChunkData::SetMeta(int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Nibble)
+{
+ if (
+ (a_RelX >= cChunkDef::Width) || (a_RelX < 0) ||
+ (a_RelY >= cChunkDef::Height) || (a_RelY < 0) ||
+ (a_RelZ >= cChunkDef::Width) || (a_RelZ < 0)
+ )
+ {
+ ASSERT(!"cChunkData::SetMeta(): index out of range!");
+ return false;
+ }
+
+ int Section = a_RelY / SectionHeight;
+ if (m_Sections[Section] == NULL)
+ {
+ if ((a_Nibble & 0xf) == 0x00)
+ {
+ return false;
+ }
+ m_Sections[Section] = Allocate();
+ if (m_Sections[Section] == NULL)
+ {
+ ASSERT(!"Failed to allocate a new section in Chunkbuffer");
+ return false;
+ }
+ ZeroSection(m_Sections[Section]);
+ }
+ int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * SectionHeight), a_RelZ);
+ NIBBLETYPE oldval = m_Sections[Section]->m_BlockMetas[Index / 2] >> ((Index & 1) * 4) & 0xf;
+ m_Sections[Section]->m_BlockMetas[Index / 2] = static_cast<NIBBLETYPE>(
+ (m_Sections[Section]->m_BlockMetas[Index / 2] & (0xf0 >> ((Index & 1) * 4))) | // The untouched nibble
+ ((a_Nibble & 0x0f) << ((Index & 1) * 4)) // The nibble being set
+ );
+ return oldval == a_Nibble;
+}
+
+
+
+
+
+NIBBLETYPE cChunkData::GetBlockLight(int a_RelX, int a_RelY, int a_RelZ) const
+{
+ if (
+ (a_RelX < cChunkDef::Width) && (a_RelX > -1) &&
+ (a_RelY < cChunkDef::Height) && (a_RelY > -1) &&
+ (a_RelZ < cChunkDef::Width) && (a_RelZ > -1)
+ )
+ {
+ int Section = a_RelY / SectionHeight;
+ if (m_Sections[Section] != NULL)
+ {
+ int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * SectionHeight), a_RelZ);
+ return (m_Sections[Section]->m_BlockLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+ }
+ else
+ {
+ return 0;
+ }
+ }
+ ASSERT(!"cChunkData::GetMeta(): coords out of chunk range!");
+ return 0;
+}
+
+
+
+
+
+NIBBLETYPE cChunkData::GetSkyLight(int a_RelX, int a_RelY, int a_RelZ) const
+{
+ if ((a_RelX < cChunkDef::Width) && (a_RelX > -1) && (a_RelY < cChunkDef::Height) && (a_RelY > -1) && (a_RelZ < cChunkDef::Width) && (a_RelZ > -1))
+ {
+ int Section = a_RelY / SectionHeight;
+ if (m_Sections[Section] != NULL)
+ {
+ int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * SectionHeight), a_RelZ);
+ return (m_Sections[Section]->m_BlockSkyLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+ }
+ else
+ {
+ return 0xF;
+ }
+ }
+ ASSERT(!"cChunkData::GetMeta(): coords out of chunk range!");
+ return 0;
+}
+
+
+
+
+
+cChunkData cChunkData::Copy(void) const
+{
+ cChunkData copy;
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ if (m_Sections[i] != NULL)
+ {
+ copy.m_Sections[i] = Allocate();
+ *copy.m_Sections[i] = *m_Sections[i];
+ }
+ }
+ return copy;
+}
+
+
+
+
+
+void cChunkData::CopyBlockTypes(BLOCKTYPE * a_Dest, size_t a_Idx, size_t a_Length) const
+{
+ size_t ToSkip = a_Idx;
+
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ size_t StartPos = 0;
+ if (ToSkip > 0)
+ {
+ StartPos = std::min(ToSkip, +SectionBlockCount);
+ ToSkip -= StartPos;
+ }
+ if (StartPos < SectionBlockCount)
+ {
+ size_t ToCopy = std::min(+SectionBlockCount - StartPos, a_Length);
+ a_Length -= ToCopy;
+ if (m_Sections[i] != NULL)
+ {
+ BLOCKTYPE * blockbuffer = m_Sections[i]->m_BlockTypes;
+ memcpy(&a_Dest[(i * SectionBlockCount) + StartPos - a_Idx], blockbuffer + StartPos, sizeof(BLOCKTYPE) * ToCopy);
+ }
+ else
+ {
+ memset(&a_Dest[(i * SectionBlockCount) - a_Idx], 0, sizeof(BLOCKTYPE) * ToCopy);
+ }
+ }
+ }
+}
+
+
+
+
+
+void cChunkData::CopyMetas(NIBBLETYPE * a_Dest) const
+{
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ if (m_Sections[i] != NULL)
+ {
+ memcpy(&a_Dest[i * SectionBlockCount / 2], &m_Sections[i]->m_BlockMetas, sizeof(m_Sections[i]->m_BlockMetas));
+ }
+ else
+ {
+ memset(&a_Dest[i * SectionBlockCount / 2], 0, sizeof(m_Sections[i]->m_BlockMetas));
+ }
+ }
+}
+
+
+
+
+
+void cChunkData::CopyBlockLight(NIBBLETYPE * a_Dest) const
+{
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ if (m_Sections[i] != NULL)
+ {
+ memcpy(&a_Dest[i * SectionBlockCount / 2], &m_Sections[i]->m_BlockLight, sizeof(m_Sections[i]->m_BlockLight));
+ }
+ else
+ {
+ memset(&a_Dest[i * SectionBlockCount / 2], 0, sizeof(m_Sections[i]->m_BlockLight));
+ }
+ }
+}
+
+
+
+
+
+void cChunkData::CopySkyLight(NIBBLETYPE * a_Dest) const
+{
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ if (m_Sections[i] != NULL)
+ {
+ memcpy(&a_Dest[i * SectionBlockCount / 2], &m_Sections[i]->m_BlockSkyLight, sizeof(m_Sections[i]->m_BlockSkyLight));
+ }
+ else
+ {
+ memset(&a_Dest[i * SectionBlockCount / 2], 0xff, sizeof(m_Sections[i]->m_BlockSkyLight));
+ }
+ }
+}
+
+
+
+
+
+void cChunkData::SetBlockTypes(const BLOCKTYPE * a_Src)
+{
+ ASSERT(a_Src != NULL);
+
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ // If the section is already allocated, copy the data into it:
+ if (m_Sections[i] != NULL)
+ {
+ memcpy(m_Sections[i]->m_BlockTypes, &a_Src[i * SectionBlockCount], sizeof(m_Sections[i]->m_BlockTypes));
+ continue;
+ }
+
+ // The section doesn't exist, find out if it is needed:
+ if (IsAllValue(a_Src + i * SectionBlockCount, SectionBlockCount, (const BLOCKTYPE)0))
+ {
+ // No need for the section, the data is all-air
+ continue;
+ }
+
+ // Allocate the section and copy the data into it:
+ m_Sections[i] = Allocate();
+ memcpy(m_Sections[i]->m_BlockTypes, &a_Src[i * SectionBlockCount], 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));
+ memset(m_Sections[i]->m_BlockSkyLight, 0xff, sizeof(m_Sections[i]->m_BlockSkyLight));
+ } // for i - m_Sections[]
+}
+
+
+
+
+void cChunkData::SetMetas(const NIBBLETYPE * a_Src)
+{
+ ASSERT(a_Src != NULL);
+
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ // If the section is already allocated, copy the data into it:
+ if (m_Sections[i] != NULL)
+ {
+ memcpy(m_Sections[i]->m_BlockMetas, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockMetas));
+ continue;
+ }
+
+ // The section doesn't exist, find out if it is needed:
+ if (IsAllValue(a_Src + i * SectionBlockCount / 2, SectionBlockCount / 2, (NIBBLETYPE)0))
+ {
+ // 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_BlockMetas, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockMetas));
+ memset(m_Sections[i]->m_BlockTypes, 0x00, sizeof(m_Sections[i]->m_BlockTypes));
+ memset(m_Sections[i]->m_BlockLight, 0x00, sizeof(m_Sections[i]->m_BlockLight));
+ memset(m_Sections[i]->m_BlockSkyLight, 0xff, sizeof(m_Sections[i]->m_BlockSkyLight));
+ } // for i - m_Sections[]
+}
+
+
+
+
+
+void cChunkData::SetBlockLight(const NIBBLETYPE * a_Src)
+{
+ if (a_Src == NULL)
+ {
+ return;
+ }
+
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ // If the section is already allocated, copy the data into it:
+ if (m_Sections[i] != NULL)
+ {
+ memcpy(m_Sections[i]->m_BlockLight, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockLight));
+ continue;
+ }
+
+ // The section doesn't exist, find out if it is needed:
+ if (IsAllValue(a_Src + i * SectionBlockCount / 2, SectionBlockCount / 2, (NIBBLETYPE)0))
+ {
+ // 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_BlockLight, &a_Src[i * SectionBlockCount / 2], sizeof(m_Sections[i]->m_BlockLight));
+ 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_BlockSkyLight, 0xff, sizeof(m_Sections[i]->m_BlockSkyLight));
+ } // for i - m_Sections[]
+}
+
+
+
+
+void cChunkData::SetSkyLight(const NIBBLETYPE * a_Src)
+{
+ if (a_Src == NULL)
+ {
+ return;
+ }
+
+ for (size_t i = 0; i < NumSections; i++)
+ {
+ // If the section is already allocated, copy the data into it:
+ if (m_Sections[i] != NULL)
+ {
+ 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, (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[]
+}
+
+
+
+
+
+cChunkData::sChunkSection * cChunkData::Allocate(void)
+{
+ // TODO: Use an allocation pool
+ return new cChunkData::sChunkSection;
+}
+
+
+
+
+
+void cChunkData::Free(cChunkData::sChunkSection * a_Section)
+{
+ // TODO: Use an allocation pool
+ delete 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));
+}
+
+
+
+
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