python画一个玫瑰和一个爱心_Python

python画一个玫瑰和一个爱心

2021-03-28 00:28DinnerHowe Python

这篇文章主要教大家用python画一个玫瑰和一个爱心，作为女生节礼物，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

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

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									#!/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)