用VB也可以模拟出一个全3D的场景，这段代码只是一个简单的实例.-VB can also simulate a full 3D scenes, this code is just a simple example.

在P4P问题中,当空间4个点共面时,不仅摄像机坐标系与物体坐标系之间 的旋转矩阵R和平移向量t可以线性求解,而且可以同时确定摄像机的有效焦距f和像素比例，该程序设计模拟已知相机矩阵M情况下由已知三维空间点和图像坐标情况求解相机外参数矩阵-When space four points coplanar P4P problem, not only between the camera coordinate system and the object coordinate system rotatio

water simulation : this code for simulate water and the external effects the make effects on the moving of water