基于3DMax与CityEngine的城市道路路灯快速批量自动建模方法

针对三维城市建模过程中采用手工建模方法对道路附属设施路灯等进行建模与摆放,效率低,位置不精确等缺点,提出基于3DMax与CityEngine的城市道路路灯批量建模与摆放方法。首先,在3DMax中建立不同的路灯模型;其次,分析路灯坐标点与道路中心线的空间关系计算邻近角,再导入到CityEngine中,通过规则程序调整路灯的大小与方向,实现在路灯坐标点上的批量自动建模。所建模型可转换为obj、3ds等通用的三维数据交换格式,可方便地实现数据共享和重复利用。最后对该建模方法进行验证,并将生成的路灯模型与道路模型进行整合,结果表明该方法实用、可靠,可节约三维城市道路附属设施数据建设的时间和成本。

Rapid batch automatic modeling method of urban road lamps based on CityEngine and 3Dmax

According to the 3D city modeling,the manual modeling method is used to model and arrange the road lamps,as for its low efficiency,inaccurate position and so on.Thus a new method which is combined the technology of CityEngine with 3DMax development is proposed to support the rapid batch automatic modeling method of urban road lamps.First,it sets up different road lamp models in 3DMax;second,it analyzes the space relationship between the road lamp coordinates and the road center line and calculate the nearangle;then imports it into CityEngine,adjusts the size and direction of road lamps by rule program, and achieves batch automatic modeling on road lamp coordinates.The model can be converted into a common three-dimensional data exchange format,such as obj,3ds,and so on,which can easily realize data sharing and reuse.Finally,the modeling method is verified,and the road lamp model and road model are integrated.The result shows that the method is practical and reliable,to a certain extent which can save the time and cost of data construction for the ancillary facilities of three dimensional urban roads.