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)

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