a visualization tool

实现可视化的A星算法演示，测试了不同的评估函数对A星效率的影响。算法可以单独使用-Visualization of the A star algorithm is demonstrated to test different evaluation function A Star efficiency. Algorithm can be used alone

SimGear是飞行模拟项目FlightGear的引擎，是一套开源库。-SimGear is a set of open-source libraries designed to be used as building blocks for quickly assembling 3d simulations, games, and visualization applications.