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3维圆柱面，可以上下左右不同视角观看，使用上下左右方向键操作(3D Cylinder)

斯坦福大学的点云数据，龙模型，对于学习点云来说是非常好的实验资料(The point cloud data of Stanford University, dragon model, for learning point cloud is very good experimental data)

LOD地形小演示 内容不多全是基本知识 用于学习事实地形 (Terrain LOD few small presentations for learning basic knowledge of all the fact that the terrain)

说明：  基于vtk的三维重构与裁切: 1.16位非压缩位图的读取与设置. 2.图像数据载入映射器 3.裁切平面的设置 4.边界的设置与显示 5.三维重构 注:需安装vtk4.0以上版本(It s about 3D reconstruct and clip based on VTK including reading and configration of 16 bits non_contracted bitmaps,the mapper for image data loading, configration of plane for clip,configration and display of borders and 3D reconstruct.(PS:VTK 4.0 or above version is needed))

水波纹 3d 采用mesh方法，通过定点z值的不用来模拟水波纹的效果(wave ripper)

DEM三维可视化的简单程序，利用Open GL实现。(DEM visualization of simple procedures, the use of Open GL implementation.)

flac3d中邓肯张自定义本构模型的源代码。(duncan self-defined model)

DDA、Bresenham画直线及画圆、多边形； 边缘填充算法和种子填充算法。(DDA, Bresenham drawing a straight line and circular, polygonal edge of the filling algorithm and seed fill algorithm.)

说明：  基于函数的曲线曲面绘制，以及beziar曲线曲面的绘制(Drawing curves and surfaces based on function, and the drawing of curves and surfaces beziar)

3d demo c++ opengl demo (good 3d demo)