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Test2
- 程序实现划线功能,可以保存、重绘;然后判断所画直线间的几何关系:相交、重合、相离,相交的直线交点以绿点显示,重合部分以红色高亮显示-Program realization crossed feature, you can save, redraw then determine the geometrical relationship between painted lines: intersect, overlap, with leave, a straight line intersecti