public override void Read(BinaryReader resourceReader, Resource resource)
{
resourceReader.BaseStream.Position = Offset;
// Decompress SNAP block compression
using var decompressedStream = BlockCompress.Decompress(resourceReader, Size);
using var reader = new BinaryReader(decompressedStream);
// Get DATA block to know how to read SNAP data
var data = resource.DataBlock.AsKeyValueCollection();
var numParticles = data.GetIntegerProperty("num_particles");
var attributes = data.GetArray("attributes");
var stringList = data.GetArray <string>("string_list");
var attributeData = new Dictionary <string, IEnumerable>();
foreach (var attribute in attributes)
{
var attributeName = attribute.GetProperty <string>("name");
var attributeType = attribute.GetProperty <string>("type");
var attributeArray = attributeType switch
{
"skinning" => ReadSkinningData(reader, numParticles, stringList),
"string" => ReadStringArray(reader, numParticles, stringList),
"bone" => ReadStringArray(reader, numParticles, stringList),
_ => ReadArrayOfType(reader, numParticles, attributeType),
};
attributeData.Add(attributeName, attributeArray);
}
NumParticles = (uint)numParticles;
AttributeData = attributeData;
}
public override void Read(BinaryReader reader, Resource resource)
{
reader.BaseStream.Position = Offset;
var outStream = new MemoryStream();
var outWrite = new BinaryWriter(outStream);
var outRead = new BinaryReader(outStream); // Why why why why why why why
var magic = reader.ReadUInt32();
if (magic == MAGIC2)
{
ReadVersion2(reader, outWrite, outRead);
return;
}
if (magic == MAGIC3)
{
RawBinaryReader = reader;
ReadVersion3(reader, outWrite, outRead);
RawBinaryReader = null;
return;
}
if (magic != MAGIC)
{
throw new UnexpectedMagicException("Invalid KV3 signature", magic, nameof(magic));
}
Encoding = new Guid(reader.ReadBytes(16));
Format = new Guid(reader.ReadBytes(16));
// Valve's implementation lives in LoadKV3Binary()
// KV3_ENCODING_BINARY_BLOCK_COMPRESSED calls CBlockCompress::FastDecompress()
// and then it proceeds to call LoadKV3BinaryUncompressed, which should be the same routine for KV3_ENCODING_BINARY_UNCOMPRESSED
// Old binary with debug symbols for ref: https://users.alliedmods.net/~asherkin/public/bins/dota_symbols/bin/osx64/libmeshsystem.dylib
if (Encoding.CompareTo(KV3_ENCODING_BINARY_BLOCK_COMPRESSED) == 0)
{
BlockCompress.FastDecompress(reader, outWrite, outRead);
}
else if (Encoding.CompareTo(KV3_ENCODING_BINARY_BLOCK_LZ4) == 0)
{
DecompressLZ4(reader, outWrite);
}
else if (Encoding.CompareTo(KV3_ENCODING_BINARY_UNCOMPRESSED) == 0)
{
reader.BaseStream.CopyTo(outStream);
outStream.Position = 0;
}
else
{
throw new UnexpectedMagicException("Unrecognised KV3 Encoding", Encoding.ToString(), nameof(Encoding));
}
var stringCount = outRead.ReadUInt32();
stringArray = new string[stringCount];
for (var i = 0; i < stringCount; i++)
{
stringArray[i] = outRead.ReadNullTermString(System.Text.Encoding.UTF8);
}
Data = ParseBinaryKV3(outRead, null, true);
}
