Sub-object Vertex Modifying Method of Scene Model in Virtual Training System

Abstract

Vertex Modifying is a key problem in sub-object modeling. Facing local special structures such as convex peaks, pits, step surfaces, slopes, terraces, cliff collapses, landslides, steep cliffs, and gully in scene models, vertex creating process and its definition are illustrated. The modeling method by vertex Modifying and the mutual relation with other sub-objects are analyzed, and the use of repetitive triangulation algorithm and chamfering algorithm based on vertex are further discussed. Vertex control method based on neighborhood factor is expounded, and the influence of its parameters is compared by value and model. The analysis indicates that vertex modification provides flexible modeling method for scene modeling in virtual training system, and the result is anticipative and satisfactory.