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authorTycho <work.tycho+git@gmail.com>2014-05-25 19:02:33 +0200
committerTycho <work.tycho+git@gmail.com>2014-05-25 19:02:33 +0200
commit8133efd7f9def01b81ef2a52c05d8ec5b7f89632 (patch)
treea56f6889aea8de8759fab87abdee2eef778873ed /src/ChunkData.cpp
parentFixed bug in freeing NULL pointers (diff)
parentinject TestGlobals.h correctly (diff)
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Diffstat (limited to '')
-rw-r--r--src/ChunkData.cpp269
1 files changed, 251 insertions, 18 deletions
diff --git a/src/ChunkData.cpp b/src/ChunkData.cpp
index 31de364b9..1bc3072c2 100644
--- a/src/ChunkData.cpp
+++ b/src/ChunkData.cpp
@@ -1,7 +1,244 @@
+#ifdef TEST_GLOBALS
+#include "TestGlobals.h"
+#else
#include "Globals.h"
+#endif
#include "ChunkData.h"
+cChunkData::cChunkData(cAllocationPool<cChunkData::sChunkSection, 1600>& a_Pool) :
+#if __cplusplus < 201103L
+ // auto_ptr style interface for memory management
+ IsOwner(true),
+#endif
+m_Pool(a_Pool)
+{
+ memset(m_Sections, 0, sizeof(m_Sections));
+}
+
+
+cChunkData::~cChunkData()
+{
+ #if __cplusplus < 201103L
+ // auto_ptr style interface for memory management
+ if (!IsOwner)
+ {
+ return;
+ }
+ #endif
+ for (size_t i = 0; i < CHUNK_SECTION_COUNT; i++)
+ {
+ if (m_Sections[i] == NULL) Free(m_Sections[i]);;
+ }
+}
+
+#if __cplusplus < 201103L
+ // auto_ptr style interface for memory management
+ cChunkData::cChunkData(const cChunkData& other) :
+ IsOwner(true),
+ m_Pool(other.m_Pool)
+ {
+ for (size_t i = 0; i < CHUNK_SECTION_COUNT; i++)
+ {
+ m_Sections[i] = other.m_Sections[i];
+ }
+ other.IsOwner = false;
+ }
+
+ cChunkData& cChunkData::operator=(const cChunkData& other)
+ {
+ if (&other != this)
+ {
+ if (IsOwner)
+ {
+ for (size_t i = 0; i < CHUNK_SECTION_COUNT; i++)
+ {
+ if (m_Sections[i]) Free(m_Sections[i]);;
+ }
+ }
+ IsOwner = true;
+ for (size_t i = 0; i < CHUNK_SECTION_COUNT; i++)
+ {
+ m_Sections[i] = other.m_Sections[i];
+ }
+ other.IsOwner = false;
+ ASSERT(&m_Pool == &other.m_Pool);
+ }
+ return *this;
+
+ }
+#else
+ // unique_ptr style interface for memory management
+ cChunkData::cChunkData(cChunkData&& other) :
+ m_Pool(other.m_Pool)
+ {
+ for (size_t i = 0; i < CHUNK_SECTION_COUNT; i++)
+ {
+ m_Sections[i] = other.m_Sections[i];
+ other.m_Sections[i] = NULL;
+ }
+ }
+
+ cChunkData& cChunkData::operator=(cChunkData&& other)
+ {
+ if (&other != this)
+ {
+ ASSERT(&m_Pool == &other.m_Pool);
+ for (size_t i = 0; i < CHUNK_SECTION_COUNT; 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 / CHUNK_SECTION_HEIGHT;
+ if (m_Sections[Section] != NULL)
+ {
+ int Index = cChunkDef::MakeIndexNoCheck(a_X, a_Y - (Section * CHUNK_SECTION_HEIGHT), 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 / CHUNK_SECTION_HEIGHT;
+ 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 * CHUNK_SECTION_HEIGHT), 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 / CHUNK_SECTION_HEIGHT;
+ if (m_Sections[Section] != NULL)
+ {
+ int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+ return (m_Sections[Section]->m_BlockMeta[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 / CHUNK_SECTION_HEIGHT;
+ 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 * CHUNK_SECTION_HEIGHT), a_RelZ);
+ NIBBLETYPE oldval = m_Sections[Section]->m_BlockMeta[Index / 2] >> ((Index & 1) * 4) & 0xf;
+ m_Sections[Section]->m_BlockMeta[Index / 2] = static_cast<NIBBLETYPE>(
+ (m_Sections[Section]->m_BlockMeta[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 / CHUNK_SECTION_HEIGHT;
+ if (m_Sections[Section] != NULL)
+ {
+ int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), 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 / CHUNK_SECTION_HEIGHT;
+ if (m_Sections[Section] != NULL)
+ {
+ int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY - (Section * CHUNK_SECTION_HEIGHT), a_RelZ);
+ return (m_Sections[Section]->m_BlockLight[Index / 2] >> ((Index & 1) * 4)) & 0x0f;
+ }
+ else
+ {
+ return 0xF;
+ }
+ }
+ ASSERT(!"cChunkData::GetMeta(): coords out of chunk range!");
+ return 0;
+}
+
cChunkData cChunkData::Copy() const
{
cChunkData copy(m_Pool);
@@ -22,13 +259,16 @@ cChunkData cChunkData::Copy() const
void cChunkData::CopyBlocks (BLOCKTYPE * a_dest, size_t a_Idx, size_t length) const
{
- for (size_t i = 0; i < CHUNK_SECTION_NUM; i++)
+ for (size_t i = 0; i < CHUNK_SECTION_COUNT; i++)
{
const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16;
- if (a_Idx > 0) a_Idx = a_Idx > length ? a_Idx - length : 0;
+ if (a_Idx > 0)
+ {
+ a_Idx = std::max(a_Idx - length, (size_t) 0);
+ }
if (a_Idx == 0)
{
- size_t tocopy = length > segment_length ? segment_length : length;
+ size_t tocopy = std::min(segment_length, length);
length -= tocopy;
if (m_Sections[i] != NULL)
{
@@ -56,7 +296,7 @@ void cChunkData::CopyBlocks (BLOCKTYPE * a_dest, size_t a_Idx, size_t length)
void cChunkData::CopyMeta(NIBBLETYPE * a_dest) const
{
- for (size_t i = 0; i < CHUNK_SECTION_NUM; i++)
+ for (size_t i = 0; i < CHUNK_SECTION_COUNT; i++)
{
const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
if (m_Sections[i] != NULL)
@@ -82,9 +322,9 @@ void cChunkData::CopyMeta(NIBBLETYPE * a_dest) const
-void cChunkData::CopyLight(NIBBLETYPE * a_dest) const
+void cChunkData::CopyBlockLight(NIBBLETYPE * a_dest) const
{
- for (size_t i = 0; i < CHUNK_SECTION_NUM; i++)
+ for (size_t i = 0; i < CHUNK_SECTION_COUNT; i++)
{
const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
if (m_Sections[i] != NULL)
@@ -112,7 +352,7 @@ void cChunkData::CopyLight(NIBBLETYPE * a_dest) const
void cChunkData::CopySkyLight(NIBBLETYPE * a_dest) const
{
- for (size_t i = 0; i < CHUNK_SECTION_NUM; i++)
+ for (size_t i = 0; i < CHUNK_SECTION_COUNT; i++)
{
const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
if (m_Sections[i] != NULL)
@@ -140,7 +380,7 @@ void cChunkData::CopySkyLight(NIBBLETYPE * a_dest) const
void cChunkData::SetBlocks(const BLOCKTYPE * a_src)
{
- for (size_t i = 0; i < CHUNK_SECTION_NUM; i++)
+ for (size_t i = 0; i < CHUNK_SECTION_COUNT; i++)
{
const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16;
if (m_Sections[i] != NULL)
@@ -153,6 +393,9 @@ void cChunkData::SetBlocks(const BLOCKTYPE * a_src)
}
else
{
+ // j counts how many of leading zeros the buffer has
+ // if j == segment_length then the buffer is all zeros so there is no point
+ // creating the buffer.
size_t j = 0;
// do nothing whilst 0
for (; j < segment_length && a_src[i * segment_length + j] == 0; j++);
@@ -180,11 +423,6 @@ void cChunkData::SetBlocks(const BLOCKTYPE * a_src)
sizeof(m_Sections[i]->m_BlockSkyLight)
);
}
- else
- {
- Free(m_Sections[i]);
- m_Sections[i] = 0;
- }
}
}
}
@@ -344,11 +582,6 @@ void cChunkData::SetSkyLight (const NIBBLETYPE * a_src)
sizeof(m_Sections[i]->m_BlockLight)
);
}
- else
- {
- Free(m_Sections[i]);
- m_Sections[i] = 0;
- }
}
}
}