public override PackedScene Import(Stream stream, string filePath)
{
var info = new GltfInfo(filePath);
if (filePath.EndsWith(".gltf"))
{
byte[] textBytes = new byte[stream.Length - stream.Position];
stream.Read(textBytes, 0, textBytes.Length);
HandleGltf(info, textBytes);
}
else
{
HandleGlb(info, stream);
}
//TODO: Add extension support.
if (info.json.extensionsRequired != null)
{
foreach (string requiredExtension in info.json.extensionsRequired)
{
throw new FileLoadException($"glTF Error: Required extension '{requiredExtension}' is not supported.");
}
}
LoadMeshes(info);
return(info.Scene);
}
protected static void HandleGltf(GltfInfo info, byte[] textBytes)
{
info.json = JsonConvert.DeserializeObject <GltfJson>(Encoding.UTF8.GetString(textBytes));
#if DEBUG
Directory.CreateDirectory("DebugInfo");
File.WriteAllText(
Path.Combine("DebugInfo", "Gltf.json"),
JsonConvert.SerializeObject(info.json, Formatting.Indented, new JsonSerializerSettings()
{
DefaultValueHandling = DefaultValueHandling.Ignore
})
);
#endif
}
protected static void HandleGlb(GltfInfo info, Stream stream)
{
using var reader = new BinaryReader(stream);
ReadHeader(reader, out _, out uint length);
int chunkId = 0;
while (reader.BaseStream.Position < length)
{
//Read Chunk
uint chunkLength = reader.ReadUInt32();
uint chunkType = reader.ReadUInt32();
byte[] chunkData = reader.ReadBytes((int)chunkLength);
if (chunkId == 0 && chunkType != ChunkJson)
{
