public static SceneSnapshot Deserialize(byte[] bytes)
{
// Format
// 4 bytes: Magic number
// 4 bytes: Header size (int)
// header:
// 4 bytes: headerVersion (int)
// 1 byte: hasMatrix: (bool)
// 43 bytes: matrix: (float)
// [the rest]: serialized scene
var sceneSnapshot = new SceneSnapshot();
sceneSnapshot.originMatrix = new Matrix4x4();
var offset = 0;
var magicNumber = BitConverter.ToInt32(bytes, offset);
var isWrapped = magicNumber == MagicNumber;
if (isWrapped)
{
offset += sizeof(int);
var headerSize = BitConverter.ToInt32(bytes, offset);
offset += sizeof(int);
var headerVersion = BitConverter.ToInt32(bytes, offset);
offset += sizeof(int);
var hasMatrix = BitConverter.ToBoolean(bytes, offset);
offset += sizeof(bool);
sceneSnapshot.isMatrixInferred = !hasMatrix;
if (hasMatrix)
{
for (var i = 0; i < 16; i++)
{
sceneSnapshot.originMatrix[i] = BitConverter.ToSingle(bytes, offset);
offset += sizeof(float);
}
}
}
else
{
sceneSnapshot.isMatrixInferred = true;
}
sceneSnapshot.sceneBytes = bytes.Skip(offset).ToArray();
if (sceneSnapshot.isMatrixInferred)
{
sceneSnapshot.originMatrix = InferMatrixFromSceneFloor(sceneSnapshot.Scene);
}
return(sceneSnapshot);
}
public static SceneSnapshot Create(Scene scene)
{
var snapshot = new SceneSnapshot();
var sceneOriginMatrix = ReadOriginMatrixFromScene(scene);
snapshot.originMatrix = sceneOriginMatrix.HasValue ? sceneOriginMatrix.Value : InferMatrixFromSceneFloor(scene);
snapshot.isMatrixInferred = sceneOriginMatrix == null;
snapshot._scene = scene;
return(snapshot);
}
