针对三维道路场景中多条道路交叉时出现的单纯重叠问题，基于开源三维图形渲染引擎 OSG (OpenSceneGraph)，提出一种三维道路交叉口的自动检测与建模方法，该方法通过分析道路矢量数据的存储特点及道路交叉口的设计规范，快速获取交叉口区域并识别其所属类型，结合计算机图形学和OSG场景渲染技术实现道路交叉口的自动建模。试验表明，该方法可有效解决三叉型、四叉型、环岛型和分离式立体交叉口的一键式生产，无须人工干预，为大数据三维道路场景的快速构建提供了有效方法。%Targeting the simple overlap arising when multiple roads intersect in a threeGdimensional road scene,an automatic detection and modeling method is provided for 3D road intersections on the basis of openGsource 3D rendering engine OSG (OpenSceneGraph).In this method,by analyzing road vectorGdata storage characteristics and intersection design specifications,an intersection area can be quickly captured or formed,with its type being identified simultaneously,so as to achieve its automatic modeling by means of computer graphics and OSG scene rendering technique.The experiment proves that this method has effectually solved oneGbutton generation of threeGway,fourGway,roundabout,and separate 3D intersecG tions,without the need of manual intervention,serving as a foundation for the quick construction of future bigGdata 3DGroad scenes.
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