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,
importpylabaspy
importtime
frompylabimport*
frommatplotlib.font_managerimportFontProperties
importmatplotlib.pyplotasplt
font=FontProperties(fname=r"c:\windows\fonts\simsun.ttc",size=14)
defreaddata(ls):
l=ls.split(',')
iflen(l)>2:
return[l[0],l[1]]
else:
returnNone
if"__main__"==__name__:
print(9)
file_obj=open('fanmaker.txt')
k=0
line=file_obj.readline()
polygon=[]
whileline:
k+=1
px=[]
py=[]
whileline:
row=readdata(line)
print(line)
px.append(row[0])
py.append(row[1])
line=file_obj.readline()
ifline=='\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)
foriinrange(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()
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