一个简单的图形演示系统,包括多边形的填充,多点插值 (逼近) 的Hermite曲线、Bezier曲线及B样条曲线平面中的凸壳算法-a simple graphic display systems, including polygon filling, Multi-point interpolation (approximate) Hermite curve, Bezier curves and B-spline curves of convex hull algorithms, etc.