三维巷道场景中虚拟漫游路径优化研究

Research on Optimization of Virtual Roaming Route in 3D Tunnel Scene

虚拟漫游技术是虚拟现实的重要部分,越来越多地运用到矿山等各领域,而对矿井巷道路径的研究是虚拟漫游的关键因素之一。为增强漫游的真实感,避免视觉抖动和场景跳跃现象,对场景漫游路径进行优化设计。首先通过对三维矿井巷道空间数据的分析,构建了三维矿井巷道模型,并在基于OpenGL的视点变换的基础上绘制三维巷道模型,实现对矿井巷道的视点追踪。然后在此基础上,运用线性等分插值和Cardinal样条曲线相结合的拟合算法,对视点追踪路径进行了优化,解决了漫游过程中视点跳跃现象和失真现象。矿井巷道的实际场景应用表明,该方法实现了漫游过程中自然平滑的运动,达到了视觉上场景的平稳移动,并能够适用于其他虚拟场景,实现场景虚拟漫游。

Virtual roaming technology,as an important part of virtual reality,is increasingly applied to various fields such as mine,and thestudy of tunnel paths is one of its key factors. In order to enhance the reality of roaming and avoid the phenomenon of visual jitter and scenehopping,the scene roaming path is carried on optimization design. In this paper,through the analysis of the spatial data of the 3D tunnel,weconstruct a 3D tunnel model,and draw it based on the viewpoint transformation of OpenGL,so as to realize the viewpoint tracking for miningtunnel. On this basis,we use the linear interpolation and Cardinal spline curve fitting algorithm for optimization of the tracking path,whichsolve the problem of the jump and distortion in the roaming. The application in mine roadway shows that this optimization method can realizethe smooth motion in the roaming,avoid the phenomenon of visual jitter and scene jumping,and also can be applied to other virtual scenesfor realization of virtual roaming.