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fix(level): find a scene file's chunks and sections as the client does

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SceneLoader::ReadLvlFile (1.10.64):
- chunked files: the file info chunk starts the file and gives where
  the environment, object and particle chunks start, 0 for none
  (DoLvlChunk, ReadLvlChunk1000); the reader walked the chunks one after
  another by their sizes instead;
- older files: the editor settings are a u32 size and that many bytes
  (SceneLoader::ReadEditorSettings, skipped by size); the reader took
  them for a u32 and then a count of 12 byte points;
- older files before version 3 have no objects for the client ("Level
  file is unsupported").

LevelFile now does the same. Every scene file on disk reads the same
objects as before.

Check in game: every world spawns its objects as before.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Aaron Kimbrell
2026-09-29 06:26:11 -05:00
parent 96d73c30a4
commit 458fb601c9
6 changed files with 134 additions and 93 deletions
Download Patch File Download Diff File Expand all files Collapse all files

191
dCommon/LevelFile.cpp
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@@ -9,109 +9,114 @@
void LevelFile::Read(std::istream& file) {
const uint32_t CHNK_HEADER = ('C' + ('H' << 8) + ('N' << 16) + ('K' << 24));
while (!file.eof()) {
uint32_t initPos = uint32_t(file.tellg());
uint32_t header = 0;
BinaryIO::BinaryRead(file, header);
if (header == CHNK_HEADER) { //Make sure we're reading a valid CHNK
ChunkHeader header;
BinaryIO::BinaryRead(file, header.id);
BinaryIO::BinaryRead(file, header.chunkVersion);
BinaryIO::BinaryRead(file, header.chunkType);
BinaryIO::BinaryRead(file, header.size);
BinaryIO::BinaryRead(file, header.startPosition);
uint32_t target = initPos + header.size;
uint32_t magic = 0;
BinaryIO::BinaryRead(file, magic);
if (magic == CHNK_HEADER) {
// SceneLoader::ReadLvlFile / DoLvlChunk: the file info chunk starts the file and gives where the environment,
// object and particle chunks start (0 for none); only the objects are read here
ChunkHeader fileInfo = ReadChunkHeader(file, 0);
file.seekg(fileInfo.startPosition);
ReadFileInfoChunk(file, fileInfo);
chunkHeaders.insert({ fileInfo.id, fileInfo });
for (const auto start : { fileInfo.fileInfo.enviromentChunkStart, fileInfo.fileInfo.objectChunkStart, fileInfo.fileInfo.particleChunkStart }) {
if (start == 0) continue;
const auto header = ReadChunkHeader(file, start);
chunkHeaders.insert({ header.id, header });
if (start != fileInfo.fileInfo.objectChunkStart) continue;
// The objects are laid out by the file's version, from its file info chunk
file.seekg(header.startPosition);
ReadSceneObjectDataChunk(file, fileInfo.fileInfo.version);
}
return;
}
//We're currently not loading env or particle data
if (header.id == ChunkTypeID::FileInfo) {
ReadFileInfoChunk(file, header);
} else if (header.id == ChunkTypeID::SceneObjectData) {
// The objects are laid out by the file's version, from its file info chunk
const auto fileInfo = chunkHeaders.find(ChunkTypeID::FileInfo);
ReadSceneObjectDataChunk(file, fileInfo == chunkHeaders.end() ? 0 : fileInfo->second.fileInfo.version);
// Scenes from before chunks (SceneLoader::ReadLvlSections): a header, then lighting, skydome and editor settings
// the world skips, then the objects
file.seekg(0);
ChunkHeader header;
header.id = ChunkTypeID::FileInfo;
BinaryIO::BinaryRead(file, header.chunkVersion);
BinaryIO::BinaryRead(file, header.chunkType);
// Only from version 32 (SceneLoader::ReadLvlHeader)
uint8_t important = 0;
if (header.chunkVersion >= 32) BinaryIO::BinaryRead(file, important);
if (header.chunkVersion > 36) {
BinaryIO::BinaryRead(file, header.fileInfo.revision);
}
// Lighting (SceneLoader::ReadLightingInfo)
if (header.chunkVersion >= 45) file.ignore(4);
file.ignore(4 * (4 * 3));
if (header.chunkVersion >= 31) {
if (header.chunkVersion >= 39) {
file.ignore(12 * 4);
if (header.chunkVersion >= 40) {
uint32_t s = 0;
BinaryIO::BinaryRead(file, s);
for (uint32_t i = 0; i < s; ++i) {
file.ignore(4 * 3); //a uint and two floats
}
}
chunkHeaders.insert(std::make_pair(header.id, header));
file.seekg(target);
} else {
if (initPos == std::streamoff(0)) { //Really old chunk version
file.seekg(0);
ChunkHeader header;
header.id = ChunkTypeID::FileInfo;
BinaryIO::BinaryRead(file, header.chunkVersion);
BinaryIO::BinaryRead(file, header.chunkType);
// Only from version 32 (SceneLoader::ReadLvlHeader)
uint8_t important = 0;
if (header.chunkVersion >= 32) BinaryIO::BinaryRead(file, important);
if (header.chunkVersion > 36) {
BinaryIO::BinaryRead(file, header.fileInfo.revision);
}
// HARDCODED 3
if (header.chunkVersion >= 45) file.ignore(4);
file.ignore(4 * (4 * 3));
file.ignore(8);
}
if (header.chunkVersion >= 31) {
if (header.chunkVersion >= 39) {
file.ignore(12 * 4);
file.ignore(3 * 4);
}
if (header.chunkVersion >= 40) {
uint32_t s = 0;
BinaryIO::BinaryRead(file, s);
for (uint32_t i = 0; i < s; ++i) {
file.ignore(4 * 3); //a uint and two floats
}
}
} else {
file.ignore(8);
}
if (header.chunkVersion >= 36) {
file.ignore(3 * 4);
}
file.ignore(3 * 4);
}
if (header.chunkVersion < 42) {
file.ignore(3 * 4);
if (header.chunkVersion >= 36) {
file.ignore(3 * 4);
}
if (header.chunkVersion < 42) {
file.ignore(3 * 4);
if (header.chunkVersion >= 33) {
file.ignore(4 * 4);
}
}
// skydome info
uint32_t count = 0;
BinaryIO::BinaryRead(file, count);
file.ignore(count);
// Five more strings from version 34 (SceneLoader::ReadSkydomeInfo)
if (header.chunkVersion >= 34) {
for (uint32_t i = 0; i < 5; ++i) {
uint32_t count = 0;
BinaryIO::BinaryRead(file, count);
file.ignore(count);
}
}
// editor settings
if (!important && header.chunkVersion >= 37){
file.ignore(4);
uint32_t count = 0;
BinaryIO::BinaryRead(file, count);
file.ignore(count * 12);
}
header.id = ChunkTypeID::SceneObjectData;
header.fileInfo.version = header.chunkVersion;
ReadSceneObjectDataChunk(file, header.fileInfo.version);
chunkHeaders.insert(std::make_pair(header.id, header));
} break;
if (header.chunkVersion >= 33) {
file.ignore(4 * 4);
}
}
// skydome info; five more strings from version 34 (SceneLoader::ReadSkydomeInfo)
uint32_t count = 0;
BinaryIO::BinaryRead(file, count);
file.ignore(count);
if (header.chunkVersion >= 34) {
for (uint32_t i = 0; i < 5; ++i) {
uint32_t count = 0;
BinaryIO::BinaryRead(file, count);
file.ignore(count);
}
}
// editor settings: their size and then that many bytes (SceneLoader::ReadEditorSettings)
if (!important && header.chunkVersion >= 37) {
uint32_t size = 0;
BinaryIO::BinaryRead(file, size);
file.ignore(size);
}
// The client has no objects for a file older than version 3 ("Level file is unsupported")
header.fileInfo.version = header.chunkVersion;
if (header.chunkVersion >= 3) {
header.id = ChunkTypeID::SceneObjectData;
ReadSceneObjectDataChunk(file, header.fileInfo.version);
}
chunkHeaders.insert(std::make_pair(header.id, header));
}
LevelFile::ChunkHeader LevelFile::ReadChunkHeader(std::istream& file, uint32_t start) {
// No check of the magic, as in the client (0x01063a00)
file.seekg(start);
uint32_t magic = 0;
ChunkHeader header;
BinaryIO::BinaryRead(file, magic);
BinaryIO::BinaryRead(file, header.id);
BinaryIO::BinaryRead(file, header.chunkVersion);
BinaryIO::BinaryRead(file, header.chunkType);
BinaryIO::BinaryRead(file, header.size);
BinaryIO::BinaryRead(file, header.startPosition);
return header;
}
void LevelFile::ReadFileInfoChunk(std::istream& file, ChunkHeader& header) {