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2D图像渲染，比如反走样，mark等效果，编码风格很好，模版用的淋漓尽致(2D image rendering, such as anti-aliasing, mark, such as the effect of good coding style, the template used by most)

CAD下VBA二次开发，用来展高程点，txt文件，已经把离散点网格化了(CAD lower VBA secondary development, to show elevation point, txt file, has the discrete points of the grid)

本代码实现了一个地图比例尺的功能，方便各种地图类型代码的基本控件使用(This code implements a function of map scale to facilitate a variety of map types of code to use the basic controls)

说明：  单文档绘图测试程序。单文档绘图测试程序。(single document mapping test. Single document mapping test.)

AE实现加载CAD格式的数据，以及对其进行转换格式，转换为SHP等格式，还有对其进行编辑等操作(AE spatial data editing functions, including generating points, generating lines, as well as delete, move elements such as fried operation)

off 转stl ，很好的转换软件源码。实现了off三维格式向stl三维格式转换，可用于CAD、ProE等软件对接。( Turn off to stl, good conversion software source code. Off to achieve a three-dimensional format stl three-dimensional format conversion, it can be used in CAD, ProE and other software docking.)

说明：  根据图框块自动识别图纸并预览打印。函数参数分别为：打印机名称，打印样式，打印纸张，打印份数，自动纸张，自动旋转，自动关闭，自动识别图框(Autoprint according to the drawing blocks.)

常用的画图API函数的具体使用方法，希望对画图感兴趣的人有所帮助(Commonly used drawing API the specific function to use, I hope to help people who are interested in drawing)

MFC下实现DDA算法、一般直线的Bresenham算法、Bresenham画圆算法 、中点圆整数优化(MFC DDA Bresenham )

观察Autocad内部数据组织的最佳工具,这个对应Autocad2(observation Autocad internal data organization the best tools, and corresponding Autocad2)