The Virtual Scene Modeling Research Based On VRML

With the advent of the Internet, web pages on 2D visual effects have been unable to meet the requirements of the customers; more users want when browsing the web can achieve in the dynamic 3D interactive; this leads to a virtual reality modeling language (VRML) was born. Because the VRML operation is simple, the space that takes up smaller and lower cost of production was widely used in the browser, realizing the rapid, simple browsing. Use in.wrl creates VRML. For suffix files, just in the browser installed corresponding VRML plug-in can browse the.wrl files; Founded in VRML we can not only in virtual world "browsing" the whole world everywhere, also can interact with them; fully satisfy the requirements of the customers.In view of virtual scene in VRML model is adopted in this paper, the research will be scene is divided into two parts; Including static and dynamic,static model is mainly to the scene by VRML stationary relate objects modeled, mainly involves buildings and AIDs, using the design Group node, the Transformer nodes and DEF reuse mechanism to jointly completed.This article mainly studied the dynamic model of virtual scene is achieved. Dynamic models include scene interaction between different nodes with the visitor's interaction with scene. The interaction between nodes are, by combining and be perception node interpolation implement node accomplish that control mechanism jointly by different nodes into eventln or eventOut. Finish In the scene and the interaction between the visitor, this paper adopts the interactive roaming function, mechanism, and the scene segmentation virtual scene of embedded external language JavaScript scene for dynamic design, use JavaScript,OrientationInterpolator node and Positionlnterpolator node to perfect the VRML obtained from browser cannot the visitor information insufficient, will handle the results after JavaScript as interpolation implement node input events, in order to achieve better dynamic interaction function.This paper puts forward four kinds of optimization by basic mechanisms: (1)constructing model reduce the browser modeling of the events; (2)Multi-purpose reuse mechanism, reuse has rendered node translations, scales or rotating reduce the browser's processing time; (3)Use inline with detail level control, the scene code simplified; (4)try to use the Texture setup appearance properties, can more real show scenes. In this paper firstly completed the main buildings in the scene of aide model design, design and background design, then use Inline nodes.wrl file all the scene in a master file inline, realized the points and autonomy, and reduce the effect of the browser processing time.