python画一个玫瑰和一个爱心

节日用心准备的礼物，使用python画玫瑰和爱心，供大家参考，具体内容如下

#!/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)

来源：https://blog.csdn.net/DinnerHowe/article/details/79488224