基于OPENGL图形库的等高线的绘制。在VC++6.0中添加GLUT工具包，利用GLUT自带函数完成等高线的绘制-Drawing contour lines base on OPENGL graphics library. Add GLUT toolkit in VC++ 6.0, and take the use of GLUT function complete the paint contour lines

A graphics toolkit, Graf_Tool() is developed which can be us(A graphics toolkit, Graf_Tool () is developed which can be us)

Graphics Toolkit C++ Line Bezier Spline Ploygon

The Visualization Toolkit (VTK) is an open-source, freely available software system for 3D computer graphics, image processing, and visualization. It consists of a C++ class library and several interpreted interface layers including Tcl/Tk, Java, and