动态场景下视点相关简单块状分层方法

摘要

We present a view-depend level of detail ( LOD) representation method, which is based on block stratified modelling idea, to deal with the problem of rendering speed optimisation for LOD of regular model group in dynamic scenes of virtual reality.The method implements the dynamic LOD representation of regular model group and the reasonable reduction of scene' s model file in a simple way.First, it effectively organises and manages 3D scene by block stratification to have the overall dynamic scene files decrease.Then, it uses the proposed dynamic weight coefficient algorithm to calculate dynamic display coefficient of each block stratum.Finally, it constructs the 3D scene model of dynamic scene variation with simple and fast way to realise virtual animation of each structural block displayed in different LOD.Experimental results show that this method can reduce the program files about 6.8%to 10.6%, and prove that the block stratification is easy to implement, and prove the effectiveness of the method as well.%针对虚拟现实动态场景下规则模型组细节层次渲染速度优化问题,提出一种基于块状分层建模思想的视点相关细节层次表示方法. 该方法以简单的方式实现规则模型组动态LOD表示和场景模型文件的合理缩减. 首先通过块状分层有效组织管理三维场景,使总体动态场景文件有所减少,然后利用所提动态权系数算法,计算各块状分层动态显示系数,最终以简单、快速的方式构建三维场景动态变化下场景模型,实现各结构块不同细节层次显示的虚拟动画. 实验结果显示,该方法能够减小程序文件6.8%~10.6%,证明块状分层易于实现和方法的有效性.