/// <summary>
/// Generates the diff from the previously recorded state and the current state. If there is a difference
/// an undo command is recorded.
/// </summary>
internal void RecordCommand()
{
if (objs == null)
{
return;
}
List <SceneObjectHeaderUndo> headers = new List <SceneObjectHeaderUndo>();
for (int i = 0; i < objs.Length; i++)
{
SceneObject obj = objs[i];
SceneObjectState orgState = orgStates[i];
if (obj.IsDestroyed)
{
continue;
}
SceneObjectDiff oldToNew = SceneObjectDiff.Create(orgState, SceneObjectState.Create(obj));
if (oldToNew.flags == 0)
{
continue;
}
SceneObjectDiff newToOld = SceneObjectDiff.Create(SceneObjectState.Create(obj), orgState);
headers.Add(new SceneObjectHeaderUndo(obj, newToOld, oldToNew));
}
if (headers.Count > 0)
{
UndoRedo.Global.RegisterCommand(new RecordSceneObjectHeaderUndo(headers, path));
}
}
/// <summary>
/// Creates a diff object storing the difference between two <see cref="SceneObjectState"/> objects.
/// </summary>
/// <param name="oldState">State of the scene object to compare from.</param>
/// <param name="newState">State of the scene object to compare to.</param>
/// <returns>Difference between the two scene object states.</returns>
internal static SceneObjectDiff Create(SceneObjectState oldState, SceneObjectState newState)
{
SceneObjectDiff diff = new SceneObjectDiff();
diff.state = new SceneObjectState();
if (oldState.name != newState.name)
{
diff.state.name = newState.name;
diff.flags |= SceneObjectDiffFlags.Name;
}
if (oldState.position != newState.position)
{
diff.state.position = newState.position;
diff.flags |= SceneObjectDiffFlags.Position;
}
if (oldState.rotation != newState.rotation)
{
diff.state.rotation = newState.rotation;
diff.flags |= SceneObjectDiffFlags.Rotation;
}
if (oldState.scale != newState.scale)
{
diff.state.scale = newState.scale;
diff.flags |= SceneObjectDiffFlags.Scale;
}
if (oldState.active != newState.active)
{
diff.state.active = newState.active;
diff.flags |= SceneObjectDiffFlags.Active;
}
return(diff);
}
internal SceneObjectHeaderUndo(SceneObject obj, SceneObjectDiff newToOld, SceneObjectDiff oldToNew)
{
this.obj = obj;
this.newToOld = newToOld;
this.oldToNew = oldToNew;
}