The basics of this program is to develop a simple 2D paint program, similar in function in many respects to MS Paint. provide the user access to the following functions: Point in this mode, each left mouse down should create a point on the scre

BspLines曲线生成 Step1：建立控制点数组； Step2：设定插值步长、曲线Si的控制点、参数t的取值区间为(0,1)； Step3：用OPENGL画出各控制点及其连线； Step4：进行插值计算：计算出的若为第一个插值点定位到画图窗口否则画曲线到该点。 -BspLines curve generation Step1: establish control points group Step2: Set interpolation step, t