qt的学习笔记，从简单的hello qt，连接信号，对话框，菜单和工具条。。。到2D和3D图形系统，opengl调用，非常实用-qt learning notes, from a simple hello qt, connecting signal, dialog, menu and toolbar. . . To 2D and 3D graphics system, opengl calls, very useful

建立一个简单的立方体 初期OPENGL 学习者会用到-Create a simple cube learners will use the initial OPENGL