实现类似cad那种undo的功能用的是stack方法。-achieve similar kind of progression undo function using the stack method.

The PhoXo Core Library (PCL) 是一套强大的跨平台图像处理库。它的主要特性包括 :* 平台无关代码* 任意区域选取* 几十种图像特效* Undo/Redo支持* 多图层* 进度显示* 直方图* 图像文件读写* 文字渲染 (目前使用WIN32-GDI+, 以后会采用FreeType替代)-The Core Library (PCL) is a powerful, cross-platform image processing library. Its main featu

使用C++实现画出点线，并设计了撤销和恢复功能，帮助初学者理解C++中的图形设置-Use C++, draw points and lines, and undo and redo capabilities designed to help beginners understand the C++ in the graphics settings

C#编写，实现windows画图程序的所有功能，并且有撤销功能（支持50次），此外还可能对图形进行旋转、缩放、平移、裁剪。曲线为Bezier曲线-All functions written in C#, windows Paint program, and the Undo function (support 50) In addition, the graphics may rotate, zoom, pan, cutting. Curve for Bezier curves