航测虚拟现实中三维模型的设计

研究目的:研究在航测虚拟现实中三维模型的设计思路,以及具体的三维房屋模型、道路模型的设计方法,从而达到三维模型在视觉上的逼真重建、显示的效果。研究方法:将需要建模的诸如房屋、道路等复杂的对象分解成多个单独的"面对象",按照实际坐标进行建模,并对每一个面进行贴面,以达到真三维的效果。研究结果:对每一个真实的对象进行三维建模技术上是可行的,但是会对计算机硬件的要求非常高,实际建模时可以综合考虑。研究结论:航测虚拟现实技术,提供三维建模与可视化、数据集成管理和分析应用等功能,能逼真呈现线路所经区域的地形环境。借助这一技术,可以给决策者、设计师以直观的三维立体印象,为道路设计方案评审及优化设计提供决策的依据。可应用在铁(公)路选线、道路空间几何线形评价、行车安全评估、环境影响评估和桥、隧、站位选择等方面。

Design of 3D Models in Virtual Reality Based on Photogrammetry

Research purposes: This paper researched the design concept of 3D Models in Virtual Reality based on photogrammetry and detailed design method of 3D house models,road models in order to reach the visual effect of high-fidelity of 3D models when reconstructed and displayed.Research methods:This paper decomposed the complex object such as house or road to every independent "surface object",and constructed 3D model with real coordinates,then made texture to every surface to reach the visual effect of high-fidelity.Research results:It is feasible to construct 3D model for every real object,but it need high requirement for hardwares of computer and we should consider it when built the models.Research conclusions:The technology of Virtual Reality based on Photogrammetry can provide visual 3D model construction,data management integration,data analysis and applications,and it can rebuild the real hypsography of the area along the route.With this technology,the designer and decision-maker can have a direct 3D impression of the study area,thus they can have the gist for evaluation and optimization of the design.It can also be used to evaluate the spatial and geometrical linearity of the designed route,vehicle operation safety,environmental influence and to choose the place for bridge,tunnel and station in railway(road) design.