使用vrml编写的三维图像，内含有javascr ipt节点。按红色，绿色灯可以更换背景，按蓝色灯可以控制上面的圆柱塔转动-Vrml prepared using three-dimensional images, javascr ipt node contains. By red, green lights can change the background, press the blue light can control tower above the rotating cylinder

实现了自己布置节点，布置路径，移动节点，并且能够查询两点间的最短路径，并用红色标出来。-Disposed node and, disposed path, the mobile node, and can query the shortest path between two points, and with red marked out.