From e40f9d6e5b93e840e3d67e79f5ba49da1fbb75f0 Mon Sep 17 00:00:00 2001
From: Tycho <work.tycho+git@gmail.com>
Date: Sat, 26 Apr 2014 10:50:23 -0700
Subject: Implemented Chunk Sparsing with segments

---
 src/ChunkBuffer.cpp | 146 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 src/ChunkBuffer.cpp

(limited to 'src/ChunkBuffer.cpp')

diff --git a/src/ChunkBuffer.cpp b/src/ChunkBuffer.cpp
new file mode 100644
index 000000000..8e87d3049
--- /dev/null
+++ b/src/ChunkBuffer.cpp
@@ -0,0 +1,146 @@
+
+#include "Globals.h"
+#include "ChunkBuffer.h"
+
+cChunkBuffer cChunkBuffer::Copy() const
+{
+	cChunkBuffer 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 cChunkBuffer::CopyBlocks   (BLOCKTYPE * a_dest, size_t a_Idx, size_t length)  const
+{
+	for (int 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;
+			memcpy(&a_dest[i * segment_length], &m_Sections[i]->m_BlockTypes, sizeof(BLOCKTYPE) * length);
+		}
+	}
+}
+
+
+
+
+
+void cChunkBuffer::CopyMeta(NIBBLETYPE * a_dest) const
+{
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		memcpy(&a_dest[i * segment_length], &m_Sections[i]->m_BlockMeta, sizeof(NIBBLETYPE) * segment_length);
+	}
+}
+
+
+
+
+
+void cChunkBuffer::CopyLight(NIBBLETYPE * a_dest) const
+{
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		memcpy(&a_dest[i * segment_length], &m_Sections[i]->m_BlockLight, sizeof(NIBBLETYPE) * segment_length);
+	}
+}
+
+
+
+
+
+void cChunkBuffer::CopySkyLight(NIBBLETYPE * a_dest) const
+{
+	for (int i = 0; i < CHUNK_SECTION_NUM; i++)
+	{
+		const size_t segment_length = CHUNK_SECTION_HEIGHT * 16 * 16 / 2;
+		memcpy(&a_dest[i * segment_length], &m_Sections[i]->m_BlockSkyLight, sizeof(NIBBLETYPE) * segment_length);
+	}
+}
+
+
+
+
+
+void cChunkBuffer::SetBlocks(const BLOCKTYPE * a_src)
+{
+	for (int 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_BlockTypes, &a_src[i * segment_length], sizeof(BLOCKTYPE) * segment_length);
+		}
+	} 
+}
+
+
+
+
+void cChunkBuffer::SetMeta(const NIBBLETYPE * a_src)
+{
+	for (int 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);
+		}
+	} 
+}
+
+
+
+
+void cChunkBuffer::SetLight(const NIBBLETYPE * a_src)
+{
+	for (int 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);
+		}
+	} 
+}
+
+
+
+
+void cChunkBuffer::SetSkyLight  (const NIBBLETYPE * a_src)
+{
+	for (int 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);
+		}
+	} 
+}
+
+
+
+
+
+cChunkBuffer::sChunkSection * cChunkBuffer::Allocate() const
+{
+	// TODO: use a allocation pool
+	return new cChunkBuffer::sChunkSection;
+}
-- 
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