Python 求点到直线的垂足

Python 求点到直线的垂足

在已知一个点，和一条已知两个点的直线的情况下

运算公式参考链接：https://www.cnblogs.com/mazhenyu/p/3508735.html

 def getFootPoint(point, line_p1, line_p2):
     """
     @point, line_p1, line_p2 : [x, y, z]
     """
     x0 = point[0]
     y0 = point[1]
     z0 = point[2]

     x1 = line_p1[0]
     y1 = line_p1[1]
     z1 = line_p1[2]

     x2 = line_p2[0]
     y2 = line_p2[1]
     z2 = line_p2[2]

     k = -((x1 - x0) * (x2 - x1) + (y1 - y0) * (y2 - y1) + (z1 - z0) * (z2 - z1)) / \
         ((x2 - x1) ** 2 + (y2 - y1) ** 2 + (z2 - z1) ** 2)*1.0

     xn = k * (x2 - x1) + x1
     yn = k * (y2 - y1) + y1
     zn = k * (z2 - z1) + z1

     return (xn, yn, zn)