飞行仿真系统中基于Terra Vista的地景设计

Designing Terra Vista-Based Land Scene in Virtual Flight Simulation System

三维地景作为视景系统的基础,在飞行仿真系统中起着重要作用。文章结合项目实践,详细说明了基于Terra Vista软件进行地景设计的方法。首先分别说明了Terra Vista软件相比较其他创建地形场景软件的特点和Creator软件在制作三维模型方面的优势。然后介绍了在地景设计中需要准备的数字高程模型数据、正射影像数据、文化特征数据、三维模型数据以及纹理数据的特征,结合以上源数据,阐述了飞行仿真系统中,使用Terra Vista软件设计三维地景的方法和注意事项。最后,通过项目实际例子证明了Terra Vista软件制作地景的可行性。

As the basis of Visual System,three-dimensional landscene plays an important role in virtual flight simulation system.we introduce a land scene design scheme based on Terra Vista combining the project practice.Firstly,the characteristic of Terra Vista on the field of land scene design and the speciality of Creator about 3 D modeling are introduced,then we expatiate the digital elevation model,digital orthophoto map data,culture data,model data,texture data which are used in the project and explicate the process is employed to build a three-dimensional virtual scene.Finally,examples verify that the Terra Vista-based design method of large land scene simulation is effective.