一个完整的例子
import numpy as np
import matplotlib.pyplot as plt
def __intersect(rect, line):
l = []
xmin,xmax,ymin,ymax = rect
a,b,c = line
assert a!=0 or b!=0
if a == 0:
y = -c/b
if y<=ymax and y>=ymin:
l.append((xmin, y))
l.append((xmax, y))
return l
if b == 0:
x = -c/a
if x<=xmax and x>=xmin:
l.append((x, ymin))
l.append((x, ymax))
return l
k = -a/b
m = -c/b
for x in (xmin, xmax):
y = k*x+m
if y<=ymax and y>= ymin:
l.append((x,y))
k = -b/a
m = -c/a
for y in (ymin, ymax):
x = k*y+m
if x xmin:
