一种基于栅格划分的海量散乱点云的K邻域搜索-Based on the grid by Massive Scattered Points K-neighborhood search

cad快捷键修改程序，适合非自己电脑修改常用快捷键，建议自行改造后使用-cad shortcut keys to modify the program, modify their computer for non-common shortcut keys, the proposed self-transformation after use

在汽车碰撞仿真的汽车模型，以及建立好了汽车模型，降低仿真难度(In vehicle crash simulation, the vehicle model is established, and the vehicle model is established to reduce the difficulty of simulation.)