as far as parametric curves and surfaces are concerned, we discuss the point-by-point generating algorithms for parametric polynomial curves, parametric rational curves and parametric polynomial surfaces 对于参数曲线曲面,介绍了参数多项式曲线,有理参数曲线和参数多项式曲面的逐点生成算法,这些算法能广泛地应用于实际。