Push Chunks Manipulator
Also commented out the shaderc build script, since it seems broken on upstream.jocadbz
parent
61cec73c49
commit
14f0fc1f3a
|
@ -70,24 +70,24 @@ fi
|
||||||
popd >/dev/null 2>&1
|
popd >/dev/null 2>&1
|
||||||
echo ">>> done"
|
echo ">>> done"
|
||||||
|
|
||||||
echo ">>> Dealing with shaderc shenanigans..."
|
#echo ">>> Dealing with shaderc shenanigans..."
|
||||||
pushd dependencies/tmp/shaderc
|
#pushd dependencies/tmp/shaderc
|
||||||
echo "Getting sources using the provided script..."
|
#echo "Getting sources using the provided script..."
|
||||||
./update_shaderc_sources.py
|
#./update_shaderc_sources.py
|
||||||
SHADERC_BUILD="build-$(dd if=/dev/urandom bs=1 count=5 2>/dev/null | base32)"
|
#SHADERC_BUILD="build-$(dd if=/dev/urandom bs=1 count=5 2>/dev/null | base32)"
|
||||||
echo "Creating and entering directory $SHADERC_BUILD."
|
#echo "Creating and entering directory $SHADERC_BUILD."
|
||||||
mkdir "$SHADERC_BUILD"
|
#mkdir "$SHADERC_BUILD"
|
||||||
cd "$SHADERC_BUILD"
|
#cd "$SHADERC_BUILD"
|
||||||
echo "Running CMake..."
|
#echo "Running CMake..."
|
||||||
CXXFLAGS="-Wno-error" cmake -GNinja -DCMAKE_BUILD_TYPE=Release ../src/
|
#CXXFLAGS="-Wno-error" cmake -GNinja -DCMAKE_BUILD_TYPE=Release ../src/
|
||||||
echo "Running Ninja..."
|
#echo "Running Ninja..."
|
||||||
ninja
|
#ninja
|
||||||
popd >/dev/null 2>&1
|
#popd >/dev/null 2>&1
|
||||||
#if needed copy more relevant files to dependencies/shaderc
|
#if needed copy more relevant files to dependencies/shaderc
|
||||||
echo "Copying binary to dependencies/shaderc/bin..."
|
#echo "Copying binary to dependencies/shaderc/bin..."
|
||||||
mkdir -vp dependencies/shaderc/bin
|
#mkdir -vp dependencies/shaderc/bin
|
||||||
cp -v "dependencies/tmp/shaderc/$SHADERC_BUILD/glslc/glslc" dependencies/shaderc/bin
|
#cp -v "dependencies/tmp/shaderc/$SHADERC_BUILD/glslc/glslc" dependencies/shaderc/bin
|
||||||
echo ">>> done"
|
#echo ">>> done"
|
||||||
|
|
||||||
echo ">>> Building zlib..."
|
echo ">>> Building zlib..."
|
||||||
pushd dependencies/zlib-1.3.1/
|
pushd dependencies/zlib-1.3.1/
|
||||||
|
|
|
@ -0,0 +1,131 @@
|
||||||
|
/*
|
||||||
|
Copyright 2024, FOSS-VG Developers and Contributers
|
||||||
|
|
||||||
|
Author(s):
|
||||||
|
Jocadbz
|
||||||
|
|
||||||
|
This program is free software: you can redistribute it and/or modify it
|
||||||
|
under the terms of the GNU Affero General Public License as published
|
||||||
|
by the Free Software Foundation, version 3.
|
||||||
|
|
||||||
|
This program is distributed in the hope that it will be useful,
|
||||||
|
but WITHOUT ANY WARRANTY; without even the implied
|
||||||
|
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||||
|
See the GNU Affero General Public License for more details.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU Affero General Public License
|
||||||
|
version 3 along with this program.
|
||||||
|
If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <iostream>
|
||||||
|
#include <fstream>
|
||||||
|
#include <vector>
|
||||||
|
#include <cstdint>
|
||||||
|
#include <cstring>
|
||||||
|
|
||||||
|
using namespace std;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Ok, before you read this, please understand.
|
||||||
|
* This is not a elaborate program. We are not
|
||||||
|
* using fancy parsers.
|
||||||
|
* I'm straight up rawdogging the .mca files
|
||||||
|
* here. Of course this should be fixed, but
|
||||||
|
* don't get mad.
|
||||||
|
*/
|
||||||
|
|
||||||
|
// Define constants related to .mca file format
|
||||||
|
const int SECTOR_SIZE = 4096;
|
||||||
|
const int CHUNK_OFFSET = 4; // Offset where chunk data starts within a sector
|
||||||
|
const int CHUNK_SIZE = 4096; // Size of a chunk data block
|
||||||
|
const int HEADER_SIZE = 4;
|
||||||
|
const int TIMESTAMP_SIZE = 4;
|
||||||
|
const int NUM_CHUNKS_PER_REGION = 1024; // 32x32 chunks per region file
|
||||||
|
|
||||||
|
// Function to extract chunks from a .mca file
|
||||||
|
// Function to extract chunks from a .mca file and print position, offset, and timestamp
|
||||||
|
void extractChunks(const string& mcaFilename) {
|
||||||
|
ifstream file(mcaFilename, ios::binary);
|
||||||
|
if (!file.is_open()) {
|
||||||
|
cerr << "Error opening file: " << mcaFilename << endl;
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Calculate the number of sectors in the file
|
||||||
|
file.seekg(0, ios::end);
|
||||||
|
int fileSize = file.tellg();
|
||||||
|
int numSectors = fileSize / SECTOR_SIZE;
|
||||||
|
|
||||||
|
// Print header information
|
||||||
|
cout << "Position (x, z), Offset, Timestamp:" << endl;
|
||||||
|
|
||||||
|
// Iterate through each sector
|
||||||
|
for (int sector = 0; sector < numSectors; ++sector) {
|
||||||
|
// Read the sector header (4 bytes)
|
||||||
|
file.seekg(sector * SECTOR_SIZE);
|
||||||
|
char header[HEADER_SIZE];
|
||||||
|
file.read(header, HEADER_SIZE);
|
||||||
|
|
||||||
|
// Extract position (x, z) from the sector header
|
||||||
|
int x = sector % NUM_CHUNKS_PER_REGION;
|
||||||
|
int z = sector / NUM_CHUNKS_PER_REGION;
|
||||||
|
|
||||||
|
// Calculate offset and timestamp positions
|
||||||
|
int offset = sector * SECTOR_SIZE + HEADER_SIZE;
|
||||||
|
int timestampOffset = sector * SECTOR_SIZE + HEADER_SIZE + CHUNK_SIZE;
|
||||||
|
|
||||||
|
// Read the timestamp (4 bytes) from the sector
|
||||||
|
file.seekg(timestampOffset);
|
||||||
|
char timestampBytes[TIMESTAMP_SIZE];
|
||||||
|
file.read(timestampBytes, TIMESTAMP_SIZE);
|
||||||
|
int timestamp = *reinterpret_cast<int*>(timestampBytes);
|
||||||
|
|
||||||
|
// Print formatted information
|
||||||
|
cout << "(" << x << ", " << z << "), " << offset << ", " << timestamp << endl;
|
||||||
|
}
|
||||||
|
|
||||||
|
file.close();
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
// Function to add or replace a chunk in a .mca file
|
||||||
|
void addReplaceChunk(const string& mcaFilename, int sectorIndex, const vector<uint8_t>& newChunkData) {
|
||||||
|
fstream file(mcaFilename, ios::in | ios::out | ios::binary);
|
||||||
|
if (!file.is_open()) {
|
||||||
|
cerr << "Error opening file: " << mcaFilename << endl;
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Calculate the offset in the file where the chunk should be written
|
||||||
|
int fileOffset = sectorIndex * SECTOR_SIZE + CHUNK_OFFSET;
|
||||||
|
|
||||||
|
// Seek to the appropriate position in the file
|
||||||
|
file.seekp(fileOffset);
|
||||||
|
|
||||||
|
// Write the new chunk data
|
||||||
|
file.write(reinterpret_cast<const char*>(newChunkData.data()), newChunkData.size());
|
||||||
|
|
||||||
|
file.close();
|
||||||
|
|
||||||
|
cout << "Chunk added/replaced successfully at sector " << sectorIndex << endl;
|
||||||
|
}
|
||||||
|
|
||||||
|
int main() {
|
||||||
|
// TODO: Remember to implement CLI here.
|
||||||
|
string mcaFilename = "r.0.0.mca"; // Example .mca file path
|
||||||
|
|
||||||
|
// Example: Extract chunks from the .mca file
|
||||||
|
extractChunks(mcaFilename);
|
||||||
|
|
||||||
|
// Example: Add or replace a chunk in the .mca file
|
||||||
|
int sectorIndex = 0; // Example: Replace the chunk in the first sector
|
||||||
|
vector<uint8_t> newChunkData(CHUNK_SIZE, 0); // Example: New chunk data (all zeroes for demonstration)
|
||||||
|
|
||||||
|
addReplaceChunk(mcaFilename, sectorIndex, newChunkData);
|
||||||
|
|
||||||
|
extractChunks(mcaFilename);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
Loading…
Reference in New Issue