This sample illustrates how to extend the Vega Scenegraph by deriving a custom node, and how to extend the vsb loader infrastructure be able to read and write the newly derived node type. Additionally the sample demonstrates how to encrypt a scenegra

绘制一本简单的可以翻页的书.要求书的封面和内容不同(使用纹理)-Drawing can be a simple flip book. Request the book cover and content of different (using texture)

简单的图形绘制软件包示例程序：要求能实现画文本、画线、三角形、矩形和点的绘制及菜单。-Simple drawing package sample program: Request to draw text, draw lines, triangles, rectangles, and points to draw menu

使用opengl函数写一个简单的控制台程序，输出一些简单的三维图形，包括：球体、圆锥、立方体、茶壶等-Write a console application, using opengl function request output some simple 3 d graphics, including: sphere, cone, cube, teapot, etc