VC开发的等值线分析代码 -高斯法计算曲面方程值并计算网格点值 这个是简单的用于画直线,圆,以及图象填充等经典算法的实现,跟CAD的画图界面很类似,但是十分简单. -development of the VC contour analysis code-Gaussian surfaces calculated value equation and calculation of grid points is the value of this simple for the painting

NTGraph的VC画图控件的实例，通过Timer控件构建两个正弦波和李沙育图形-NTGraph the VC drawing control instance, the two sine wave through the Timer control to build and Lissajous Figures