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

setRational() void setRational ( bool  rational ) 设置是否有理 设置三维贝塞尔曲线是否有理 param[in] rational 是否有理