实时渲染系统MRRS的设计与实现

【作者】 刘俸维；

【导师】 张建中；

【作者基本信息】 电子科技大学 ， 计算机系统结构， 2004， 硕士

【摘要】 随着计算机硬件技术的发展,在一般PC机上运行复杂三维应用已变得非常普及,特别是三维游戏、虚拟现实、数字城市等三维应用发展迅速,因而这些应用背后的实时三维图形软件技术的研究与开发就变得越来越重要。可以预见到对实时三维图形技术的应用将会持续增长。本论文研究的目的是设计和实现一个实验性的微型实时三维渲染系统MRRS(Mini Real-time Rendering System),该系统实现的文本渲染和场景渲染优化技术,已成功应用于珠江新城数字城市项目之中。作为一个基于OpenGL的微型三维引擎,MRRS包含向量和矩阵模块、多定时器模块、照相机模块、视图体模块、基于Unicode的中英文混合文本渲染模块、纹理加载库模块和八叉树模块。MRRS能够渲染基于八叉树的场景文件,可以根据自定义的递归深度和单个节点的面数限制进行场景的八叉树重构,能够高品质地渲染中英文混合的任意字符串,能够支持多种字体,多种字体大小的字符串渲染以及动态文本的渲染。MRRS支持可调整的渲染帧速和场景漫游,实现了场景漫游的路径记录和回放功能。MRRS也优化了视图体与AABB盒相交检测算法。为了增强应用的健壮性(Robustness),MRRS还使用了资源管理和资源泄漏检测技术。本论文研究主要涉及计算机图形学,向量和矩阵理论,字体技术,面向对象设计,资源控制,场景数据结构设计等方面,所有研究结果都集成在MRRS系统中,最终的MRRS系统是一个可扩展的C++应用。文章分为5部分。第一部分介绍了技术背景、本论文完成的工作以及一些术语缩写和解释;第二部分介绍了OpenGL三维渲染基础和数学基础;第三部分给出了MRRS系统结构并详细分析了MRRS中文本渲染和场景渲染优化技术;第四部分析了资源管理技术;最后是项目应用介绍、结论和将来的工作。更多还原

【Abstract】 With the fast development of hardware, it is very popular and common that complex 3d application running on a general PC, especially these applications such as 3d game, virtual reality and digital city are grown quickly, so it becomes more and more important to research and develop the technology of real-time 3d which are hidden in those application. It is expected that in the nearest future the applications based the technology of real-time 3d graphics increase substantially.The purpose of the thesis is to design and implement a mini 3d rendering system named MRRS (Mini Real-time Rendering System) for experiment, the techniques of rendering optimization and text rendering in MRRS are applied in the digital city project of ZhuJiang new city successfully. As a mini 3d engine of OpenGL, MRRS includes Vector and Matrix module, Multi-timer module, Camera module, View Frustum module, Text Rendering module for mixing string of Chinese and English based Unicode, Texture loading library module and Octree module. MRRS can render the scene file of octree, can rebuild octree according the customized recursive depth and face count upper limit per octree node, can render text which mix Chinese and English characters in high quality, It support multiple font face, multiple font face size and dynamic text, MRRS support tunable frame speed and scene roam, it also implement the function of path recording and playback when roaming in scene. MRRS optimizes the intersection algorithms between view frustum and AABB box, for increase the robustness of applications, the technique of resource management and resource leak detection is applied in MRRS.The research of the thesis involves computer graphics, theory of vector and matrix, font technique, object oriented design, resource control, scene data structure design. Eventually, all these research result are integrated into MRRS system which is an extendable c+ + application.The thesis consists of five parts. Part I is technology background, my work in the thesis and some acronyms. Part II introduced the basic techniques of OpenGL rendering and math basic. Part III showed the system structure of MRRS and analyzed the techniques of text rendering and rendering optimization in details. Part IV analyzed the techniques of resource management and resource leak detection. Finally introduction of project application、 the conclusions and future developments are analyzed.更多还原