包含Ogre场景管理，场景渲染，设计模式，消息机制，数据文件结构分析以及渲染系统线程化文档-Contains Ogre scene management, scene rendering, design patterns, messaging, data analysis, and file structure of the document rendering system thread

简单的说，RRDtool (Round Robin Database Tool)就是一个强大的绘图的引擎，很多工具例如MRTG都可以调用rrdtool绘图。-RRDtool is the OpenSource industry standard, high performance data logging and graphing system for time series data. RRDtool can be easily integrated in shell scr ipts, pe