python绘制封闭多边形教程

数据格式：（polygon.txt) 里面含有2个多边形，一行是一个点

0.085, 0.834,
0.024, 0.744,
0, 0.63,
0.024, 0.516,
0.085, 0.427,
0.5, 0.02,
0.675, 0.191,
0.795, 0.071,
0.815, 0.052,
0.835, 0.032,
0.84, 0.026,
0.844, 0.022,
0.856, 0.012,
0.871, 0.005,
0.886, 0.001,
0.903, 0,

0.823, 0.061,
0.823, 0.062,
0.826, 0.061,

import pylab as py
import time
from pylab import *
from matplotlib.font_manager import FontProperties
import matplotlib.pyplot as plt
font = FontProperties(fname=r"c:\windows\fonts\simsun.ttc", size=14)
def readdata(ls):
l = ls.split(',')
if len(l)>2:
return [l[0],l[1]]
else:
return None

if "__main__"==__name__:
print(9)
file_obj=open('fanmaker.txt')
k=0
line=file_obj.readline()
polygon =[]
while line:
k+=1
px=[]
py=[]
while line:
row = readdata(line)
print (line)
px.append(row[0])
py.append(row[1])
line=file_obj.readline()
if line=='\n':
ps=[]
px.append(px[0])
py.append(py[0])
ps.append(px)
ps.append(py)
polygon.append(ps)
line=file_obj.readline()
break
x=np.array(polygon[0][0])
y=np.array(polygon[0][1])
##  plt.fill(x,y,'b')
plt.plot(x,y,'b-', linewidth=2)
for i in range(len(polygon)-1):
x=np.array(polygon[i+1][0])
y=np.array(polygon[i+1][1])
##    plt.fill(x,y,'b')
plt.plot(x,y,'r-', linewidth=2)
plt.hold(True)
##  plt.show()

x1=[-0.5 ,1.5]
x2=[-0.5,-0.5]
x3=[1.5 ,-0.5]
x4=[1.5,1.5]
plt.plot(x1,x2,'-')
plt.plot(x2,x3,'-')
plt.plot(x3,x4,'-')
plt.plot(x4,x1,'-')
plt.axis([-0.5,1.5 ,-0.5,1.5])
plt.show()
#   plt.axis('tight')
file_obj.close()

以上这篇python绘制封闭多边形教程就是小编分享给大家的全部内容了，希望能给大家一个参考

您可能感兴趣的文章:

• python opencv圆、椭圆与任意多边形的绘制实例详解
• python实现根据给定坐标点生成多边形mask的例子
• python3射线法判断点是否在多边形内
• Python随机生成均匀分布在三角形内或者任意多边形内的点