直线平滑连接程序；该程序可以实现两条相交直线之间参平滑连接，连接弧采用贝塞尔曲线。连接弧自动生成，连接弧大小通过参数设定来限制。-Smooth linear connection procedures the program can realize the intersection of two straight-line connection between the parameter smoothing, using Bezier curves connecting arc. Connec