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cad文本输入，适合宗地号输入。地籍测绘作业宗地号预编使用。(cad text input, suitable parcel number input.Cadastral mapping operations parcel number pre-programmed to use.)

绘制多图形图表的强大功能库软件示例。请下载！(PGL is a library that encapsulates plot capabilities in a MFC project for VC6 and VC7. It is designed to be able to easily plot data generated in a project without the need of any external software.)

解析法面积计算,读数据文件,计算后生成结果文件,任意多边形的顶点坐标,然后 计算出面积是平方米和公顷(analytical calculation, reading data files, calculation results generated documents, arbitrary polygon vertices, then compute the area of square meters and ha)

MFC实现的画板程序，能够画图并保存，适合初学者(Sketchpad program, implemented by MFC drawing and save for beginners)

这个程序是用Breseham画法在visual c++平台下画直线和圆。可以对图像进行刷新，画多条直线，多个圆(This procedure is used Breseham paint in visual c++ platform for the next drawing a straight line and circle. Can refresh the image, painted more than a straight line, a number of round)

手动绘制点，自动生成样条曲线，可以拖动修改点来修改样条曲线(Manually plotting points, automatically generated spline curves, you can drag the modified point to modify the spline)

图形学上机实验，用三种算法画线。包括Bresenham画线算法、中点画线和数值微分画线算法(Graphics on an experiment with three algorithms draw the line. Bresenham line algorithm, the dotted line and numerical differential line drawing algorithm)

本程序实现了计算机图形学的一些重要算法（画直线，画圆，画椭圆，区域填充，图形裁剪，齿轮生成，三次样条曲线等等），源码和可执行程序均打包于文件中(this program is implemented some important algorithm of computer graphics such as drawing lines,drawing circles,drawing ellipse,area filling,Graphics clipping，gear wheel generation ，three times spline curve and so on），source code and executable files are all included in the compressed file。 )

说明：  我对计算机图形学的编程实践，包括画直线、反走样直线、画圆、 画椭圆、画矩形、画多边形、矩形填充、多边形填充、3D变换、光照、贴图等。由于 精力有限，未对原码做任何注释。出于简化编程的考虑，许多地方指定了常数，未做 通用处理。解压缩后建立gui16目录，在其下有原代码和工程文件。在gui16下建立 release目录，其下有一可执行文件及其所须的位图及模型文件。如在release目录之 外执行程序，必须复制所需位图及模型文件。 必须复制的文件： Chopper.asc chopper.bmp cp.bmp end.BMP end.txt w1.bmp w2.bmp w3.bmp 如有问题欢迎大家和我交流！ 联系方式： e-mail:cproom@163.net http://cproom.yeah.net 通讯地址：陕西省西安市太白南路202号(骊山微电子公司)陈鹏（收） 邮编　　：710065 电话　　：(029)-8234582(computer graphics programming using GDI)

用四阶龙格-库塔法求系统在U单位阶跃输入下该系统的响应曲线(Using the four order Runge Kutta method to find the response curve )