基于通用模型文件的城市三维景观面向对象可视化方法

三维模型文件的.Obj格式是一种通用的开放式模型格式。该文在分析OBJ模型文件结构的基础上,针对城市空间信息应用的特点,设计了一种通用的三维模型对象的类结构,利用该类建立的三维模型对象,可以直接获取OBJ文件中的几何、材质等三维实体信息。对象中的可视化成员方法利用模型数据和OpenGL图形处理技术实现对三维模型的真实感显示。三维通用模型和面向对象思想的引入,比较好地解决了城市三维景观中复杂模型的建模和可视化问题,有利于对复杂场景中大量三维模型的有效管理和组织。

Object-oriented Visualization Technique of Urban 3D Landscape Based on Current Model File

The.obj format of3D model file is a currently exoteric model format.Based on OBJ model file analyzing and aimed at characteristic of urban space information application,a class framework of current 3D model object is de-signed in this paper.Using3D model object constructed by the calss,we can directly acquire the solid information in OBJ file,such as geometry information,texture information,and so on.Using model data and OpenGL,the third dimension display of3D model can be realized by visualization member technique in this object.Importing current 3D model and object-oriented can preferably solve modeling and visualization of complex model in urban3D landscape,which is also make for effective manage and organize of abundant 3D model in complex scene.