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

 1 def getFootPoint(point, line_p1, line_p2):
 2     """
 3     @point, line_p1, line_p2 : [x, y, z]
 4     """
 5     x0 = point[0]
 6     y0 = point[1]
 7     z0 = point[2]
 8     
 9     x1 = line_p1[0]
10     y1 = line_p1[1]
11     z1 = line_p1[2]
12     
13     x2 = line_p2[0]
14     y2 = line_p2[1]
15     z2 = line_p2[2]
16     
17     k = -((x1 - x0) * (x2 - x1) + (y1 - y0) * (y2 - y1) + (z1 - z0) * (z2 - z1)) / 
18         ((x2 - x1) ** 2 + (y2 - y1) ** 2 + (z2 - z1) ** 2)*1.0
19     
20     xn = k * (x2 - x1) + x1
21     yn = k * (y2 - y1) + y1
22     zn = k * (z2 - z1) + z1
23     
24     return (xn, yn, zn)