摘要
以点状目标、线状目标、面状目标和三角网目标的建模实现对大规模场景信息的三维建模,并应用有向无环树状场景图,以面向对象的方式管理场景数据,既有利于场景结构与层次的表达,又节省了存储空间,方便了数据的操作。通过对视景体可见区外的场景图节点进行裁剪处理,大大减少了系统渲染处理的数据量。应用实例表明,系统在保持场景真实感的情况下,提高了绘制速度,满足了大规模场景实时漫游的要求。
3D model of large scale scene is accomplished through the point-object modeling,line-object modeling,face-object modeling and triangle nets-object modeling.The scene data is organized by directed acyclic graph（DAG） using the object oriented（OO） mode.All these are propitious to expression structure and hierarchy of scene,memory saving and data operation.The rendering node of DAG is cut down greatly through cutting out of visible field of view volume.The experiment results show that the system can achieve good performance on the quality of scene and the speed of rendering.
出处
《工程图学学报》
CSCD
北大核心
2010年第5期107-111,共5页
Journal of Engineering Graphics
关键词
计算机应用
三维场景建模
有向无环树状场景图
视景体可见区
实时漫游
computer application
3D scene modeling
directed acyclic graph
visible field of view volume
real-time walkthrough
