summaryrefslogtreecommitdiffstats
path: root/src/world/Section.cpp
blob: ff2a4fb91bd6dc1a921357c5e51c2e53d1a154c9 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
#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);
}