1 files changed, 320 insertions, 0 deletions

diff --git a/src/ChunkData.cpp b/src/ChunkData.cpp
new file mode 100644
index 000000000..160d118ad
--- /dev/null
+++ b/src/ChunkData.cpp
@@ -0,0 +1,320 @@
+
+#include "Globals.h"
+#include "ChunkData.h"
+
+cChunkData cChunkData::Copy() const
+{
+	cChunkData copy;
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		if(m_Sections[i])
+		{
+			copy.m_Sections[i] = Allocate();
+			*copy.m_Sections[i] = *m_Sections[i];
+		}
+	}
+	return copy;
+}
+
+
+
+
+
+void cChunkData::CopyBlocks   (BLOCKTYPE * a_dest, size_t a_Idx, size_t length)  const
+{
+	for (size_t i = 0; i < CHUNK_SECTION_NUM; 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) 
+		{
+			size_t tocopy = length > segment_length ? segment_length : length;
+			length -= tocopy;
+			if(m_Sections[i])
+			{
+				memcpy(
+					&a_dest[i * segment_length],
+					&m_Sections[i]->m_BlockTypes, 
+					sizeof(BLOCKTYPE) * tocopy
+				);
+			}
+			else
+			{
+				memset(
+					&a_dest[i * segment_length],
+					0,
+					sizeof(BLOCKTYPE) * tocopy
+				);
+			}
+		}
+	}
+}
+
+
+
+
+
+void cChunkData::CopyMeta(NIBBLETYPE * a_dest) const
+{
+	for (size_t i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		if(m_Sections[i])
+		{
+			memcpy(
+				&a_dest[i * segment_length], 
+				&m_Sections[i]->m_BlockMeta, 
+				sizeof(NIBBLETYPE) * segment_length);
+		}
+		else
+		{
+			memset(
+				&a_dest[i * segment_length],
+				0,
+				sizeof(BLOCKTYPE) * segment_length
+			);
+		}
+	}
+}
+
+
+
+
+
+void cChunkData::CopyLight(NIBBLETYPE * a_dest) const
+{
+	for (size_t i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		if(m_Sections[i])
+		{
+			memcpy(
+				&a_dest[i * segment_length],
+				&m_Sections[i]->m_BlockLight,
+				sizeof(NIBBLETYPE) * segment_length
+			);
+		}
+		else
+		{
+			memset(
+				&a_dest[i * segment_length],
+				0,
+				sizeof(BLOCKTYPE) * segment_length
+			);
+		}
+	}
+}
+
+
+
+
+
+void cChunkData::CopySkyLight(NIBBLETYPE * a_dest) const
+{
+	for (size_t i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		if(m_Sections[i])
+		{
+			memcpy(
+				&a_dest[i * segment_length],
+				&m_Sections[i]->m_BlockSkyLight,
+				sizeof(NIBBLETYPE) * segment_length
+			);
+		}
+		else
+		{
+			memset(
+				&a_dest[i * segment_length],
+				0xFF,
+				sizeof(BLOCKTYPE) * segment_length
+			);
+		}
+	}
+}
+
+
+
+
+
+void cChunkData::SetBlocks(const BLOCKTYPE * a_src)
+{
+	for (size_t i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16;
+		if (m_Sections[i])
+		{
+			memcpy(&m_Sections[i]->m_BlockTypes, &a_src[i * segment_length], sizeof(BLOCKTYPE) * segment_length);
+		}
+		else
+		{
+			size_t j = 0;
+			// do nothing whilst 0
+			for (; j < segment_length && a_src[i * segment_length + j] == 0; j++);
+			if (j != segment_length)
+			{
+				m_Sections[i] = Allocate();
+				memcpy(
+					&m_Sections[i]->m_BlockTypes, 
+					&a_src[i * segment_length],
+					sizeof(BLOCKTYPE) * segment_length
+					);
+				memset(m_Sections[i]->m_BlockMeta,0x00,sizeof(m_Sections[i]->m_BlockMeta));
+				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));
+			}
+			else
+			{
+				Free(m_Sections[i]);
+				m_Sections[i] = 0;
+			}
+		}
+	} 
+}
+
+
+
+
+void cChunkData::SetMeta(const NIBBLETYPE * a_src)
+{
+	for (size_t i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		if (m_Sections[i])
+		{
+			memcpy(&m_Sections[i]->m_BlockMeta, &a_src[i * segment_length], sizeof(NIBBLETYPE) * segment_length);
+		}
+		else
+		{
+			size_t j = 0;
+			// do nothing whilst 0
+			for (; j < segment_length && a_src[i * segment_length + j] == 0; j++);
+			if (j != segment_length)
+			{
+				m_Sections[i] = Allocate();
+				memcpy(
+					&m_Sections[i]->m_BlockMeta, 
+					&a_src[i * segment_length],
+					sizeof(BLOCKTYPE) * segment_length
+					);
+				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));
+			}
+			else
+			{
+				Free(m_Sections[i]);
+				m_Sections[i] = 0;
+			}
+		}
+	} 
+}
+
+
+
+
+void cChunkData::SetLight(const NIBBLETYPE * a_src)
+{
+	if (!a_src) return;
+	for (size_t i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		if (m_Sections[i])
+		{
+			memcpy(&m_Sections[i]->m_BlockLight, &a_src[i * segment_length], sizeof(NIBBLETYPE) * segment_length);
+		}
+		else
+		{
+			size_t j = 0;
+			// do nothing whilst 0
+			for (; j < segment_length && a_src[i * segment_length + j] == 0; j++);
+			if (j != segment_length)
+			{
+				m_Sections[i] = Allocate();
+				memcpy(
+					&m_Sections[i]->m_BlockLight, 
+					&a_src[i * segment_length],
+					sizeof(BLOCKTYPE) * segment_length
+					);
+				memset(m_Sections[i]->m_BlockTypes,0x00,sizeof(m_Sections[i]->m_BlockTypes));
+				memset(m_Sections[i]->m_BlockMeta,0x00,sizeof(m_Sections[i]->m_BlockMeta));
+				memset(m_Sections[i]->m_BlockSkyLight,0xFF,sizeof(m_Sections[i]->m_BlockSkyLight));
+			}
+			else
+			{
+				Free(m_Sections[i]);
+				m_Sections[i] = 0;
+			}
+		}
+	}
+}
+
+
+
+
+void cChunkData::SetSkyLight  (const NIBBLETYPE * a_src)
+{
+	if (!a_src) return;
+	for (size_t i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		if (m_Sections[i])
+		{
+			memcpy(&m_Sections[i]->m_BlockSkyLight, &a_src[i * segment_length], sizeof(NIBBLETYPE) * segment_length);
+		}
+		else
+		{
+			size_t j = 0;
+			// do nothing whilst 0
+			for (; j < segment_length && a_src[i * segment_length + j] == 0xFF; j++);
+			if (j != segment_length)
+			{
+				m_Sections[i] = Allocate();
+				memcpy(
+					&m_Sections[i]->m_BlockSkyLight, 
+					&a_src[i * segment_length],
+					sizeof(BLOCKTYPE) * segment_length
+					);
+				memset(m_Sections[i]->m_BlockTypes,0x00,sizeof(m_Sections[i]->m_BlockTypes));
+				memset(m_Sections[i]->m_BlockMeta,0x00,sizeof(m_Sections[i]->m_BlockMeta));
+				memset(m_Sections[i]->m_BlockLight,0x00,sizeof(m_Sections[i]->m_BlockLight));
+			}
+			else
+			{
+				Free(m_Sections[i]);
+				m_Sections[i] = 0;
+			}
+		}
+	}
+}
+
+
+
+
+
+cChunkData::sChunkSection * cChunkData::Allocate() const
+{
+	// TODO: use a allocation pool
+	return new cChunkData::sChunkSection;
+}
+
+
+
+void cChunkData::Free(cChunkData::sChunkSection * ptr) const
+{
+	delete ptr;
+}
+
+
+
+void cChunkData::ZeroSection(cChunkData::sChunkSection * ptr) const
+{
+	memset(ptr->m_BlockTypes,0x00,sizeof(ptr->m_BlockTypes));
+	memset(ptr->m_BlockMeta,0x00,sizeof(ptr->m_BlockMeta));
+	memset(ptr->m_BlockLight,0x00,sizeof(ptr->m_BlockLight));
+	memset(ptr->m_BlockSkyLight,0xFF,sizeof(ptr->m_BlockSkyLight));
+}
+
+
+
+