EulerSequence eulerSequenceFromName eulerSequenceName evaluateVector getEulerAngles getRawValue getValue getValue getValue getValue getYawPitchRoll identity inverse invert isIdentity isNull isSame isSame m_Angle m_Axis m_Quat makeRotationByAxes multVec multVec normalize operator!= operator* operator*= operator= operator== operator[] operator[] Rotation Rotation Rotation Rotation Rotation Rotation Rotation scaleAngle setEulerAngles setValue setValue setValue setValue setValue setYawPitchRoll slerp

isIdentity() bool isIdentity ( ) const 检查当前旋转对象是否表示一个单位（或恒等）旋转 检查当前旋转对象是否表示一个单位（或恒等）旋转。 返回 如果是单位旋转，返回 true；否则返回 false