最近在一些夹角计算的时候,根据三点坐标计算夹角,并封装为方法,方便以后调用。
def cal_ang(point_1, point_2, point_3):
"""
根据三点坐标计算夹角
:param point_1: 点1坐标
:param point_2: 点2坐标
:param point_3: 点3坐标
:return: 返回任意角的夹角值,这里只是返回点2的夹角
"""
a=math.sqrt((point_2[0]-point_3[0])*(point_2[0]-point_3[0])+(point_2[1]-point_3[1])*(point_2[1] - point_3[1]))
b=math.sqrt((point_1[0]-point_3[0])*(point_1[0]-point_3[0])+(point_1[1]-point_3[1])*(point_1[1] - point_3[1]))
c=math.sqrt((point_1[0]-point_2[0])*(point_1[0]-point_2[0])+(point_1[1]-point_2[1])*(point_1[1]-point_2[1]))
A=math.degrees(math.acos((a*a-b*b-c*c)/(-2*b*c)))
B=math.degrees(math.acos((b*b-a*a-c*c)/(-2*a*c)))
C=math.degrees(math.acos((c*c-a*a-b*b)/(-2*a*b)))
return B
cal_ang((0, 0), (1, 1), (0, 1))
返回值为:44.999999999999986