Geometry Modeling for Virtual Reality Based on CAD Data

Abstract

Abstract:In order to satisfy the requirement of geometry modeling for virtual reality system, this study processed a modeling method based on CAD data. Firstly, the media file that is exported from the CAD data was parsed to gain the mesh data. Following this, the mesh data was simplified through the improved quadric error metrics algorithm, to obtain a better shape of triangle. At last, the mesh data was analyzed to establish a standard virtual reality model with Level of Details via OpenFlight API. Experiments showed that the triangular mesh shape obtained by using the proposed algorithm is more reasonable than QEM algorithm, but had higher quality of rendering. With extensive simplification, rendering frame rate and loading efficiency of model were observed to be highly improved, and visualization of the virtual reality model experienced almost no change, which will be sufficient to meet the demand of virtual reality system.