大型三维交通场景道路的自动构建  

Automatic Road Construction for Large-Scale 3D Traffic Scene

作　　者：王贤隆 柳有权[1] 李浩宇[1] 董飞[1] 

机构地区：[1]长安大学信息工程学院,陕西西安710064

出　　处：《计算机仿真》2016年第10期124-128,440,共6页Computer Simulation

基　　金：中央高校基本科研业务费专项资金(2013G1241112;2011TD009)

摘　　要：大规模交通仿真场景的构建能为智慧交通、交通控制、车流预测等提供仿真平台,但是大规模的城市交通仿真存在着建模工作量大、可视化效果不好等问题。为解决上述问题,提出了一种自动构建三维城市路网的方法,首先通过包围盒算法计算出道路控制点坐标,然后通过贝塞尔曲线和高程数据模型构造交叉口等复杂的道路结构,最后通过二维纹理映射算法和Catmull-Rom样条算法优化可视化效果。上述方法能够根据道路矢量数据自动构建出交叉口、T型路、Y型路、立交桥等城市道路模型,同时能自动地赋予道路结构正确的纹理信息。实验验证了方法的通用性和鲁棒性。Large- scale traffic scenario simulation provides a platform for intelligent transportation,traffic control,and traffic prediction,but large- scale simulation is often accompanied with the problems of heavy workload and poor visualization. Thus we proposed an automatic method to construct three- dimensional urban road network. First,a bounding box was used to calculate the path control point coordinates; then Bezier curves and elevation data were used to construct road intersections and other complex structures; and finally texture mapping and Catmull- Rom Spline algorithm were used to optimize visualization. With the method,intersection,T- shape road,Y- shape road,overpasses and other type urban road model can be automatically constructed with right road texture information,according to the urban road network data. Experiments verify its versatility and robustness.

关 键 词：交通仿真 三维道路结构 包围盒算法 纹理映射 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]