Research On The Effective Modeling Of Virtual Reality Based On CAD Data

Compare several modeling method according to the significance of virtual view modeling. Considering our modeling requirement of the view for Light Flight Simulator, we explore a new quick Openflight database generation method based on existing CAD product models.The data format of CATIA is based on feathers. So it is necessary to extract the surface feather of part models as well as triangulate the complex surface with the help of CAA API and RADE tool embedded in Visual Studio. The triangle mesh should be exported as common files for other external programs to read expediently.The creation and modification method of Openflight model database is explored, so the interface between CATIA and Openflight can be established and models can be generated automatically from mesh files. This converting algorism has been integrated into Creator to make models visualization via the plugin development of Creator. Aiming at the problem of redundant polygons of generated models, we have developed polygon reduction modules in Creator, including LOD models generation and management and invisible polygon deletion.The whole simulator model has been walked in VegaPrime runtime environment. The visualization simulation has achieved a satisfying result, so this method put forward in this paper is valid and effective.