python画一个玫瑰和一个爱心

#!/usr/bin/env python
#coding=utf-8
#女生节礼物
 
import rospy
from sensor_msgs.msg import LaserScan
import numpy
import copy
 
node_name = "Test_Maker"
 
class Test_Maker():
 def __init__(self):
  self.Define()
  rospy.Timer(rospy.Duration(0.5), self.Timer_CB1)
  rospy.Timer(rospy.Duration(0.5), self.Timer_CB2)
  rospy.Timer(rospy.Duration(0.5), self.Timer_CB3)
  rospy.Timer(rospy.Duration(0.5), self.Timer_CB4)
  rospy.spin()
 
 def Define(self):
  self.pub_scan1 = rospy.Publisher('test/test_scan1', LaserScan, queue_size=1)
  self.pub_scan2 = rospy.Publisher('test/test_scan2', LaserScan, queue_size=1)
  self.pub_scan3 = rospy.Publisher('test/test_scan3', LaserScan, queue_size=1)
  #慎用！！！！
  self.pub_scan4 = rospy.Publisher('test/test_scan4', LaserScan, queue_size=1)
 
 def Timer_CB1(self, e):
  data = LaserScan()
  data.header.frame_id = "base_link"
  data.angle_min = 0
  data.angle_max = numpy.pi*2
  data.angle_increment = numpy.pi*2 / 200
  data.range_max = numpy.Inf
  data.range_min = 0
  theta = 0
  for i in range(200):
   r = 8.* numpy.sin(5. * theta )
   data.ranges.append(copy.deepcopy(r))
   data.intensities.append(theta)
   r = 8.* numpy.sin(5. * -theta)
   data.ranges.append(copy.deepcopy(r))
   data.intensities.append(theta)
 
   theta += data.angle_increment
  data.header.stamp = rospy.Time.now()
  self.pub_scan1.publish(data)
 
 def Timer_CB2(self, e):
  data = LaserScan()
  data.header.frame_id = "base_link"
  data.angle_min = 0
  data.angle_max = numpy.pi*2
  data.angle_increment = numpy.pi*2 / 200
  data.range_max = numpy.Inf
  data.range_min = 0
  theta = 0
  for i in range(200):
   r = 8. * numpy.cos(5. * theta) + 1
   data.intensities.append(theta)
   data.ranges.append(copy.deepcopy(r))
   r = 8. * numpy.cos(5. * -theta) + 1
   data.intensities.append(theta)
   data.ranges.append(copy.deepcopy(r))
   theta += data.angle_increment
 
  data.header.stamp = rospy.Time.now()
  self.pub_scan2.publish(data)
 
 def Timer_CB3(self, e):
  data = LaserScan()
  data.header.frame_id = "base_link"
  data.angle_min = 0
  data.angle_max = numpy.pi*2
  data.angle_increment = numpy.pi*2 / 50
  data.range_max = numpy.Inf
  data.range_min = 0
  theta = 0
  for i in range(200):
   r = 2. * numpy.sin(5. * theta) + 1
   data.intensities.append(theta)
   data.ranges.append(copy.deepcopy(r))
   r = 2. * numpy.sin(5. * -theta) + 1
   data.intensities.append(theta)
   data.ranges.append(copy.deepcopy(r))
   theta += data.angle_increment
 
  data.header.stamp = rospy.Time.now()
  self.pub_scan3.publish(data)
 
 #慎用！！！！
 def Timer_CB4(self, e):
  data = LaserScan()
  data.header.frame_id = "base_link"
  data.angle_min = 0
  data.angle_max = numpy.pi*2
  data.angle_increment = data.angle_max / 200
  data.range_max = numpy.Inf
  data.range_min = 0
  theta = 0
  for i in range(200):
   r = 9. * numpy.arccos(numpy.sin(theta)) + 9
   data.ranges.append(r)
   theta += data.angle_increment
 
  data.header.stamp = rospy.Time.now()
  self.pub_scan4.publish(data)
 
if __name__ == '__main__':
 node_name = 'Test_Maker'
 rospy.init_node(node_name)
 try:
  Test_Maker()
 except rospy.ROSInterruptException:
  rospy.logerr('%s error'%node_name)