设计和实现一个图形函数库，具有绘制直线段、任意圆弧、椭圆弧、多边形区域的阴影填充和颜色填充等功能。-Design and implementation of a graphics library, with the draw line segments, any arc, ellipse, polygon area fill and color filled the shadow functions.

利用Canny的方法实现边沿检测，核函数采用高斯核，sigma大小可以任意调节，阈值也可以任意选。界面优美。-Does the method of using Canny edge detection, the function USES the gaussian kernel, sigma size can be adjusted, and the threshold can be arbitrarily chosen. Beautiful interface.

绘制函数并用动画模拟任意函数的积分过程（几种方法可选），借助calcstar可任意输入方程。有功能视频。 环境：vs2015+of_v0_9_3-Draw any equations on the screen and simulate the integration process with several methods.With calcstar you can input any equations.Environment:vs2015+of_0_9_3