///<summary>
/// Adds an entity to the manager.
///</summary>
///<param name="e">Entity to add.</param>
///<exception cref="InvalidOperationException">Thrown if the entity already belongs to a states manager.</exception>
public void Add(Entity e)
{
lock (InterpolatedStates.FlipLocker)
{
lock (ReadBuffers.FlipLocker)
{
if (e.BufferedStates.BufferedStatesManager == null)
{
e.BufferedStates.BufferedStatesManager = this;
e.BufferedStates.motionStateIndex = entities.Count;
entities.Add(e);
if (ReadBuffers.Enabled)
{
ReadBuffers.Add(e);
}
if (InterpolatedStates.Enabled)
{
InterpolatedStates.Add(e);
}
}
else
{
throw new InvalidOperationException("Entity already belongs to a BufferedStatesManager; cannot add.");
}
}
}
}
