public static NativeArray <uint> GetChunkHashes <T>(ArchetypeChunk chunk, T hasher, uint seed) where T : struct, IHasher
{
var types = chunk.GetNonzeroComponentTypes(Allocator.Temp);
var typeCount = types.Length;
var hashes = new NativeArray <uint>(typeCount + 1, Allocator.Temp, NativeArrayOptions.UninitializedMemory);
for (int i = 0; i < typeCount; i++)
{
var chunkIndex = new ChunkTypeIndex
{
Value = i
};
var type = types[i];
if (type.IsBuffer)
{
var elementSize = TypeManager.GetTypeInfo(type.TypeIndex).ElementSize;
var bufferViews = chunk.GetBufferViews(chunkIndex, elementSize, Allocator.Temp);
var bufferCount = bufferViews.Length;
var bufferHashes = new NativeArray <uint>(bufferCount, Allocator.Temp, NativeArrayOptions.UninitializedMemory);
for (int j = 0; j < bufferCount; j++)
{
bufferHashes[j] = hasher.Execute(bufferViews[j], type, seed);
}
hashes[i] = GetDenseHash(bufferHashes, seed);
bufferHashes.Dispose();
bufferViews.Dispose();
}
else
{
var view = chunk.GetComponentView(chunkIndex);
hashes[i] = hasher.Execute(view, type, seed);
}
}
hashes[typeCount] = GetChunkHeaderHash(chunk, seed);
types.Dispose();
return(hashes);
}