BSplineCurve2D BSplineCurve2D BSplineCurve2D copy getDegree getKnots getLength getMultiplicities getPeriodic getPoles getRational isClosed mDegree mKnots mMultiplicities mPeriodic mPoles mRational setDegree setKnots setMultiplicities setPeriodic setPoles setRational ~BSplineCurve2D

setPeriodic() void setPeriodic ( bool  periodic ) 设置是否周期性 设置二维B样条曲线是否周期性 参数 [in] periodic 是否周期性