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Compute top non-air layer

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This doesn't yet ignore non-opaque blocks.
This commit is contained in:
Matthias Schiffer 2015-02-01 07:47:22 +01:00
parent 2d2671a686
commit cd45c4009c
4 changed files with 102 additions and 28 deletions
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55
src/World/Chunk.cpp
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@ -39,6 +39,20 @@
namespace MinedMap {
namespace World {
Chunk::Chunk(Buffer buffer) {
size_t size = buffer.get32();
Buffer buffer2(buffer.get(size), size);
uint8_t format = buffer2.get8();
if (format != 2)
throw std::invalid_argument("unknown chunk format");
inflateChunk(buffer2);
parseChunk();
analyzeChunk();
}
void Chunk::inflateChunk(Buffer buffer) {
size_t outlen = 0;
uint8_t *output = nullptr;
@ -97,11 +111,11 @@ void Chunk::analyzeChunk() {
}
}
uint8_t Chunk::getBlockAt(const std::shared_ptr<const NBT::CompoundTag> &section, size_t x, size_t y, size_t z) {
uint8_t Chunk::getBlockAt(const std::shared_ptr<const NBT::CompoundTag> &section, size_t x, size_t y, size_t z) const {
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) {
uint8_t Chunk::getDataAt(const std::shared_ptr<const NBT::CompoundTag> &section, size_t x, size_t y, size_t z) const {
size_t i = getIndex(x, y, z);
uint8_t v = (*section->get<NBT::ByteArrayTag>("Data"))[i / 2];
@ -111,18 +125,37 @@ uint8_t Chunk::getDataAt(const std::shared_ptr<const NBT::CompoundTag> &section,
return (v & 0xf);
}
Chunk::Chunk(Buffer buffer) {
size_t size = buffer.get32();
Chunk::Blocks Chunk::getTopLayer() const {
size_t done = 0;
Blocks blocks = {};
Buffer buffer2(buffer.get(size), size);
for (auto it = sections->rbegin(); it != sections->rend(); ++it) {
if (done == SIZE*SIZE)
break;
uint8_t format = buffer2.get8();
if (format != 2)
throw std::invalid_argument("unknown chunk format");
for (ssize_t y = SIZE-1; y >= 0; y--) {
if (done == SIZE*SIZE)
break;
inflateChunk(buffer2);
parseChunk();
analyzeChunk();
for (size_t x = 0; x < SIZE; x++) {
for (size_t z = 0; z < SIZE; z++) {
if (blocks.blocks[x][z].id)
continue;
uint8_t block = getBlockAt(*it, x, y, z);
if (block) {
blocks.blocks[x][z].id = block;
blocks.blocks[x][z].data = getDataAt(*it, x, y, z);
done++;
}
}
}
}
}
std::cerr << "Done: " << done << std::endl;
return blocks;
}
}