:VTK is a module that allows you to call VTK (Visualization ToolKit) functions from a perl scr ipt. The Visualization ToolKit is an open-source 3D Graphics Visualization library available at www.kitware.com. -:VTK is a module that allows

OpenGL（全写Open Graphics Library）是个定义了一个跨编程语言、跨平台的编程接口规格的专业的图形程序接口。它用于三维图象（二维的亦可），是一个功能强大，调用方便的底层图形库。 -it is OpenGL

OpenGL全面系统地介绍了进行OpenGL编程所需的基础知识, 如三维基本图元的绘制、坐标变换、颜色、光照、纹理映射、动画和用户交互技术等。-OpenGL( Open Graphics Library)A comprehensive and systematic introduction to the basic knowledge of OpenGL programming, such as the rendering of three-dimensional basic elements,