Research On The Visualization Technology Of 3D Forest Scene Based On WEB

With the development of Virtual Reality technology, networking technology and computer graphics etc, 3D virtrualization system running on a single machine no longer meets people's need. WEB-based 3D virtualization system has been the research focus in the area of virtual reality and virtual landscape. WEB-based 3D Forest scene proposed in the paper achieves network roaming and forest resource data sharing. People can navigate and observe the scene in omni directions and multiple views.Comparative and analytic research on current technology of modeling and rendering of 3D terrain and virtual plants is made in the paper. The DEM terrain modeling and its real-time rendering, terrain rendering using LOD optimization, and the modeling and rendering of WEB-based virtual trees are the major topics of our discussion. After comparative analysis of advantages and disadvantages of different methods, a method to construct WEB-based forest scene and real-time rendering based on Java3D is proposed in this paper according to the characteristics of the forest scene.The main research work in this paper including methods to construct WEB-based 3D terrain model and texture mapping, LOD real-time rendering technology based on Java3D. Against the problem of tree modeling, the algorithm based on Java3D to analysis 3DS format file is completed to model virtual trees on Java3D scene graph. The mixed rendering method of geometry rendering and image-based rendering is applied to make forest scene better visual effects. Furthermore, topics on collision detection are discussed based on Java3D technology to achieve interaction in WEB-based forest scene.