基于OGRE引擎的虚拟场景浏览  

Virtual scene browse based on OGRE engine

作　　者：罗会兰[1] 胡思文[1] 

机构地区：[1]江西理工大学信息工程学院,江西赣州341000

出　　处：《计算机工程与设计》2013年第5期1744-1751,共8页Computer Engineering and Design

基　　金：国家973重点基础研究发展计划基金项目(2010CB327900);国家自然科学基金项目(61105042;30990263)

摘　　要：虚拟现实技术的虚拟交互性得到了越来越广泛地应用,虚拟场景浏览技术有效地解决了现实世界的时空局限等瓶颈问题。在对虚拟现实(3I)原理研究分析的基础上,依据插件设计的思想,设计了一种基于OGRE引擎的虚拟场景浏览框架,框架明确的包含两个端:渲染端和控制端。渲染端封装了OGRE渲染引擎,实现了快速实时的渲染;控制端,通过建立虚拟漫游交互机制来完成虚拟场景与外设的实时控制。基于OGRE八叉树的场景管理、射线查询算法、寻路算法、物体的拣取、RTT等技术的运用实现了用户与虚拟环境的交互系统,用户操作信号输入到计算机中并作用于虚拟环境,创建实时渲染处理结构,实现人与虚拟环境的实时快速的交互;基于OpenAL,OggSound的音效系统,克服了用户在场景浏览时的单调与乏味,更具真实感,丰富了场景浏览的真实性。在实践中应用OGRE图形引擎、CEGUI界面库、OpenAL,OggSound声音库实现了该系统。The virtual interaction of virtual reality technology is widely used. The virtual scene browsing system effectively solve the bottleneck problem of time and space limitations in real world. Based on the basic virtual reality （ 3 I） theory analysis, accord- ing to the plugin design method, a virtual scene browsing framework based on the OGRE engine is designed. The whole frame contains two parts： the render part is the control part. The rendering part is enclosed with the ORGE rendering engine, and the fast real-time rendering is realizal. The control part establishes a virtual roaming interaction mechanism to complete the virtual scene and real-time control of the peripheral. Based on the OGRE eight binary tree scene management, ray inquiring algo-rithm, path finding algorithm, object picking algorithm and RTT techniques are used to realize the interactions between users and virtual environments. The proposed framework could respond the users＇ operation quickly and could be used for virtual environment to create real-time rendering processing structure. The experimental results show that the proposed method can achieve the real-time and rapid interaction. Using OpenAL and OggSound sound system, the proposed framework would keep users from feeling monotonous and boring when scene browsing. It gave users more realistic and rich scene browsing authenticity. The OGRE graphic engine, CEGUI interface library, OpenAL and OggSound sound library are applied to implement the proposed system.

关 键 词：虚拟现实 射线查询算法 八叉树 寻路算法 渲染到纹理 物体拣取 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]