点到直线垂线交点计算

Posted 2022-10-15 鲁氏新之助

点到直线垂线交点计算

linepoint_1, linepoint_2:直线的两个端点
verticalline_point：线外点
a为斜率,b为截距

def get_cross_point(linepoint_1, linepoint_2, verticalline_point):
    a = (linepoint_1[1] - linepoint_2[1]) / (linepoint_1[0] - linepoint_2[0])
    a_ver = -1 / a
    b_ver = verticalline_point[1] - a_ver * verticalline_point[0]
    b = linepoint_1[1] - a * linepoint_1[0]
    point_long = (b_ver - b) / (a - a_ver)
    point_lat = a * point_long + b
    return point_long, point_lat