从网络管理系统中获取网络主干链路带宽数据，计算带宽利用率，并生成主干链路带宽利用率图形。-from Network Management System access network backbone link bandwidth data to calculate bandwidth utilization, Generation and trunk link bandwidth utilization graphics.

粒子系统，sparkengine，使用opengl+C++实现，对于学习粒子系统的同学来说，是不溶错过的学习资料！(OpenGL's collection of instances, with nearly 230 instances, is very suitable for students to learn OpenGL! The example is simple and clear and easy to understand.)