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#include <world/Section.hpp>
Section::Section(Vector position, byte *dataBlocks, size_t dataBlocksLength, byte *dataLight, byte *dataSky,
byte bitsPerBlock,
std::vector<unsigned short> palette) {
worldPosition = position;
m_dataBlocksLen = dataBlocksLength;
m_dataBlocks = new byte[m_dataBlocksLen];
std::copy(dataBlocks, dataBlocks + m_dataBlocksLen, m_dataBlocks);
m_dataLight = new byte[2048];
std::copy(dataLight, dataLight + 2048, m_dataLight);
if (dataSky) {
m_dataSkyLight = new byte[2048];
std::copy(dataSky, dataSky + 2048, m_dataSkyLight);
}
m_palette = palette;
m_bitsPerBlock = bitsPerBlock;
}
Section::~Section() {
delete[] m_dataBlocks;
m_dataBlocksLen = 0;
m_dataBlocks = nullptr;
delete[] m_dataLight;
m_dataLight = nullptr;
delete[] m_dataSkyLight;
m_dataSkyLight = nullptr;
}
Block &Section::GetBlock(Vector pos) {
return m_blocks[pos.GetY() * 256 + pos.GetZ() * 16 + pos.GetX()];
}
double totalParsingTime = 0;
void Section::Parse() {
if (!m_blocks.empty())
return;
long long *longArray = reinterpret_cast<long long *>(m_dataBlocks);
for (size_t i = 0; i < m_dataBlocksLen / 8; i++)
endswap(&longArray[i]);
std::vector<unsigned short> blocks;
blocks.reserve(4096);
{
auto begin = std::chrono::steady_clock::now();
int bitPos = 0;
unsigned short t = 0;
for (size_t i = 0; i < m_dataBlocksLen; i++) {
for (int j = 0; j < 8; j++) {
t |= (m_dataBlocks[i] & 0x01) ? 0x80 : 0x00;
t >>= 1;
m_dataBlocks[i] >>= 1;
bitPos++;
if (bitPos >= m_bitsPerBlock) {
bitPos = 0;
t >>= m_bitsPerBlock - 1;
blocks.push_back(t);
t = 0;
}
}
}
auto end = std::chrono::steady_clock::now();
std::chrono::duration<double, std::milli> time = end - begin;
totalParsingTime += time.count();
}
std::vector<byte> light;
light.reserve(4096);
for (int i = 0; i < 2048; i++) {
byte t = m_dataLight[i];
byte first = t & 0b11110000;
byte second = t >> 4;
light.push_back(first);
light.push_back(second);
}
for (int i = 0; i < 4096; i++) {
unsigned short blockId = m_palette.size() > 0 ? m_palette[blocks[i]] : blocks[i];
Block block(blockId >> 4, blockId & 0xF);
m_blocks.push_back(block);
}
delete[] m_dataBlocks;
m_dataBlocksLen = 0;
m_dataBlocks = nullptr;
delete[] m_dataLight;
m_dataLight = nullptr;
delete[] m_dataSkyLight;
m_dataSkyLight = nullptr;
parseWaiter.notify_all();
}
Section &Section::operator=(Section other) {
std::swap(*this, other);
return *this;
}
void swap(Section &a, Section &b) {
using std::swap;
swap(a.m_dataBlocksLen, b.m_dataBlocksLen);
swap(a.m_dataBlocks, b.m_dataBlocks);
swap(a.m_dataLight, b.m_dataLight);
swap(a.m_dataSkyLight, b.m_dataSkyLight);
swap(a.m_blocks, b.m_blocks);
swap(a.m_palette, b.m_palette);
swap(a.m_bitsPerBlock, b.m_bitsPerBlock);
}
Section::Section(const Section &other) {
worldPosition = other.worldPosition;
m_dataBlocksLen = other.m_dataBlocksLen;
if (other.m_blocks.empty()) {
m_dataBlocks = new byte[m_dataBlocksLen];
std::copy(other.m_dataBlocks, other.m_dataBlocks + m_dataBlocksLen, m_dataBlocks);
m_dataLight = new byte[2048];
std::copy(other.m_dataLight, other.m_dataLight + 2048, m_dataLight);
if (other.m_dataSkyLight) {
m_dataSkyLight = new byte[2048];
std::copy(other.m_dataSkyLight, other.m_dataSkyLight + 2048, m_dataSkyLight);
}
} else {
std::copy(other.m_blocks.begin(), other.m_blocks.end(), std::back_inserter(m_blocks));
}
m_palette = other.m_palette;
m_bitsPerBlock = other.m_bitsPerBlock;
}
Vector Section::GetPosition() {
return worldPosition;
}
size_t Section::GetHash() {
if (m_blocks.empty()) return 0;
unsigned char *from = reinterpret_cast<unsigned char *>(m_blocks.data());
size_t length = m_blocks.size() * sizeof(Block);
std::string str(from, from + length);
return std::hash<std::string>{}(str);
}
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