PCBfunctions.py 文件源码

def shiftPointOnLine(self, x1, y1, x2, y2, distance):
        if x2 - x1 == 0:  # vertical line


            x_T1 = x1
            y_T1 = y1 - distance
        else:
            a = (y2 - y1) / (x2 - x1)

            if a == 0:  # horizontal line
                x_T1 = x1 - distance
                y_T1 = y1
            else:
                alfa = atan(a)
                #alfa = tan(a)

                x_T1 = x1 - distance * cos(alfa)
                y_T1 = y1 - distance * sin(alfa)

        return [x_T1, y_T1]