import numpy as np
import pandas as pd
def get_crosss_point(A,B,C,D):k1,k2,b1,b2 = np.nan,np.nan,0,0xa,xb,xc,xd = A[0],B[0],C[0],D[0]ya, yb, yc, yd = A[1], B[1], C[1], D[1]if xb!=xa:k1 = (yb-ya)/(xb-xa)if xc!=xd:k2 = (yd-yc)/(xd-xc)if k1==k2:print('平行无交点')return Noneif k1!=np.nan:b1 = (xb*ya-xa*yb)/(xb-xa)if k2!=np.nan:b2 = (xd*yc-xc*yd)/(xd-xc)if k1==np.nan:cpx = xacpy = np.float(k2*cpx+b2)elif k2== np.nan:cpx = xccpy = np.float(k1*cpx+b1)elif k1==0:cpx = np.float((ya-b2)/k2)cpy = yaelif k2==0:cpx = np.float((yc-b1)/k1)cpy = ycelse:cpx = np.float((b2-b1)/(k1-k2))cpy = np.float((k2*b1-k1*b2)/(k2-k1))return [cpx,cpy]if __name__ == '__main__':#求四点确定的两条线段的交点，p2,p3 ---line1 p4,p5----line2points = [(7, 7), (33, 375), (314, 375), (454, 249), (437, 12)]p1, p2, p3, p4, p5 = points[0], points[1], points[2], points[3], points[4]crossp= get_crosss_point(p2, p3, p4, p5)print(crossp) #[463.0379746835443, 375]
