同济大学学报（自然科学版）2009，Vol.37Issue(7)：978-982,5.DOI:10.3969/j.issn.0253-374x.2009.07.026
桥梁参数化建模系统的虚拟地形及数据组织
Virtual Terrain and Data Organization in Parametric Modeling System of Bridge
摘要
Abstract
According to the requirements of the parametric 3D modeling system of the bridge,a new algorithm was developed to quickly generate a virtual terrain.The details of terrain were enriched by a fractal theory.In order to accelerate retrieval of the triangle containing the given point,a quadtree data structure was used to store triangulated irregular network.The triangle retrieved was subdivided by sparse control points to join bridge models and terrain.The viewpoint range was controlled by a quickly collision detection method between the viewpoint and the terrain.Sky sphere,terrain and bridge models were organized together based on the tree structure.Finally,a lifelike scene of bridge was generated.关键词
虚拟地形/四叉树/分形理论/不规则三角网/参数化3维建模Key words
virtual terrain/quadtree/fractal theory/triangulated irregular network/parametric 3D modeling分类
信息技术与安全科学引用本文复制引用
王峰,程效军,杨海波..桥梁参数化建模系统的虚拟地形及数据组织[J].同济大学学报（自然科学版）,2009,37(7):978-982,5.基金项目
国家科技支撑计划基金资助项目(2006BAJ09B01,2006BAJ03A07) （2006BAJ09B01,2006BAJ03A07）
