绘制3次B研样条曲线，通过代码运行演示出3次B样条曲线的绘制。-Research to draw 3 B spline curve, running through the code shows the three B-spline Curve.

这是BSPLINE测试程序，鼠标单击4个点后生成3次b样条，使用qt4.8.5 + vs2008编译 内含可执行文件，支持定点拖拽-This is BSPLINE test program that generates click four points after three b-spline, use qt4.8.5+ vs2008 compiled containing the executable file, and support drag control point

均匀三次B样条曲线插值，给定若干点求出曲线(Uniform three times B spline curve interpolation, given a number of points to find the curve)