BezierCurve BezierCurve BezierCurve copy getDegree getLength getMultiplicities getPeriodic getPoles getRational isClosed mDegree mMultiplicities mPeriodic mPoles mRational Reverse setDegree setMultiplicities setPeriodic setPoles setRational ~BezierCurve

getPeriodic() bool getPeriodic ( ) const 获取是否周期性 获取三维贝塞尔曲线是否为周期性 返回 true为是，false为否