B样条插值拟合的程序，可以对图象或数据离散点进行插值，拟合，-it is B spline fitting program,it s very useful for photo or data

求两圆相交面积 两圆半径分别问ar,br,两圆圆心距为d-Seeking two circles intersect area radius Q ar, br, two round Heart distance is d if ar+ br < d return 0 two circles from else if (fabs (ar-br),> d return area (min (ar , br)) of two circles covering else the two

qt custom plot Bugfixes: - Fixed regression which garbled date-time tick labels on axes, if setTickLabelType is ltDateTime and setNumberFormat contains the "b" option #### Version 1.2.0 released on 14.03.14 #### Bugfixes: - Fix