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Further chunk parsing

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This commit is contained in:
Matthias Schiffer 2015-02-01 05:54:42 +01:00
parent d922636311
commit 18ed3d4c5d
2 changed files with 34 additions and 5 deletions
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26
src/World/Chunk.cpp
View file

@ -27,6 +27,7 @@
#include "Chunk.hpp"
#include "../Util.hpp"
#include "../NBT/ByteTag.hpp"
#include "../NBT/ByteArrayTag.hpp"
#include <iostream>
#include <stdexcept>
@ -82,15 +83,32 @@ void Chunk::parseChunk() {
if (!(*this) || tag.first != "")
throw std::invalid_argument("invalid root tag");
sections = (*this)->get<const NBT::ListTag<NBT::CompoundTag>>("Level", "Sections");
if (!sections)
throw std::invalid_argument("no sections found");
level = assertValue((*this)->get<NBT::CompoundTag>("Level"));
sections = assertValue(level->get<NBT::ListTag<NBT::CompoundTag>>("Sections"));
}
void Chunk::analyzeChunk() {
maxY = (assertValue(sections->back()->get<NBT::ByteTag>("Y"))->getValue() + 1) * SIZE;
std::cerr << "maxY: " << maxY << std::endl;
for (auto &section : *sections) {
if (assertValue(section->get<NBT::ByteArrayTag>("Blocks"))->getLength() != SIZE*SIZE*SIZE
|| assertValue(section->get<NBT::ByteArrayTag>("Data"))->getLength() != SIZE*SIZE*SIZE/2)
throw std::invalid_argument("corrupt chunk data");
}
}
uint8_t Chunk::getBlockAt(const std::shared_ptr<const NBT::CompoundTag> &section, size_t x, size_t y, size_t z) {
return (*section->get<NBT::ByteArrayTag>("Blocks"))[getIndex(x, y, z)];
}
uint8_t Chunk::getDataAt(const std::shared_ptr<const NBT::CompoundTag> &section, size_t x, size_t y, size_t z) {
size_t i = getIndex(x, y, z);
uint8_t v = (*section->get<NBT::ByteArrayTag>("Data"))[i / 2];
if (i % 2)
return (v >> 4);
else
return (v & 0xf);
}
Chunk::Chunk(uint8_t *buffer, size_t buflen) {

13
src/World/Chunk.hpp
View file

@ -46,13 +46,24 @@ private:
size_t len;
UniqueCPtr<uint8_t[]> data;
std::shared_ptr<const NBT::CompoundTag> level;
std::shared_ptr<const NBT::ListTag<NBT::CompoundTag>> sections;
unsigned maxY;
void inflateChunk(uint8_t *data, size_t len);
void parseChunk();
void analyzeChunk();
std::shared_ptr<const NBT::ListTag<NBT::CompoundTag>> sections;
size_t getIndex(size_t x, size_t y, size_t z) {
if (x >= SIZE || y >= SIZE || z >= SIZE)
throw std::range_error("Chunk::getIndex(): bad coordinates");
return 256*y + 16*z + x;
}
uint8_t getBlockAt(const std::shared_ptr<const NBT::CompoundTag> &section, size_t x, size_t y, size_t z);
uint8_t getDataAt(const std::shared_ptr<const NBT::CompoundTag> &section, size_t x, size_t y, size_t z);
public:
Chunk(uint8_t *buffer, size_t buflen);