Terrex虚拟现实场景中设计道路的建模方法研究

Construction of Road Design in Terrex Virtual Scence

Terrex虚拟场景中既有道路的建模相对比较容易,由于地形数据中已经包含了路面的信息,因此只需要在现有地形上添加带状要素,并贴加道路纹理即可.然而设计道路的高程信息并没有包含在DEM数据中,按照以上方法构建显然是不可行的.采用从现有DEM数据中提取施工范围以外的点,并增加设计道路横断面轮廓点,从而生成新的DEM文件,再构建道路模型.按照这种思路在虚拟场景中实现设计道路的建模,更接近于实际的情况.

The construction of the existing road in the virtual scene is relatively easy, due to the terrain data has already contained the information of the road, and the only thing is to add ribbon elements in the exist- ing terrain and paste road texture. However,the elevation of the design of the road does not include in the DEM data,so to build a road in accordance with the above method is obviously not feasible. In this paper, the construction outside the scope is extracted from the existing DEM data point, and the cross-section con- tour points of the road are increased to generate a new DEM files,and then build the road. To biuld the de- sign of road model in the design of roads built in the virtual scene according to this idea is closer to the real- ity of the situation.