public CommandData(CommandData cmdData)
 {
     _cmdType = cmdData._cmdType;
     _start = cmdData._start;
     _end = cmdData._end;
     _center = cmdData._center;
     CalculateStartAngle();
     CalculateEndAngle();
     CalculateRadius();
 }
 public void SetCommand(CommandData data)
 {
     _data = data;
 }