Implicit and parametric forms for curves and surfaces have their advantages and must be efficiently transformed from one to another in order to make best use of their advantages.

• 摘要曲线和曲面的隐式表示和参数表示各有其优点，为了能够利用两种表示方法的优点，必须能够有效的进行曲线曲面的两种表达形式的相互转换。