详细讲述了二维线画图元的生成（包括二维直线、圆、椭圆、抛物线的生成）、二维填充图元的生成（图形的填充、字符的输出）、二维裁剪、图形变换（平移、旋转、放缩三种变换）、投影（透视投影）和曲线生成（Hermite曲线和Bezier曲线的生成）的算法思想以及程序实现。-A detailed account of the two-dimensional line drawing of the generating element (including the two-dimensional linear, circular, elliptical, parabolic generation), two-dimensional pixel fill generation (graphics-filled, characters of the output), two-dimensional cutting, graphics transform (translation , rotation, zoom transform three), projection (perspective projection) and Curve (Hermite curves and Bezier curves generation) algorithm for the realization of ideas and procedures.