BezierCurve2D BezierCurve2D BezierCurve2D copy getDegree getLength getMultiplicities getPeriodic getPoles getRational isClosed mDegree mMultiplicities mPeriodic mPoles mRational setDegree setMultiplicities setPeriodic setPoles setRational ~BezierCurve2D

getPeriodic() bool getPeriodic ( ) const 获取是否为周期性曲线 获取二维贝塞尔曲线是否为周期性曲线