Python中roslibpy 获取ros小车坐标并打印出来
时间: 2023-05-20 07:07:24 浏览: 338
你可以使用以下代码获取小车在ROS坐标系中的位置,并将其打印出来:
```python
import rospy
from roslibpy import Ros
# 初始化ROS节点并连接到ROS服务器
ros = Ros('localhost', 9090)
ros.run()
# 订阅小车位置话题
car_pose_topic = '/car/pose'
car_pose_sub = ros.subscribe(car_pose_topic, 'geometry_msgs/Pose', queue_size=10)
# 回调函数,当接收到小车位置消息时自动被调用
def handle_car_pose_msg(pose_msg):
# 打印小车在ROS坐标系中的位置
print('Car Position (ROS Coordinates):')
print('x =', pose_msg['position']['x'])
print('y =', pose_msg['position']['y'])
print('z =', pose_msg['position']['z'])
# 绑定回调函数到小车位置话题
car_pose_sub.add_callback(handle_car_pose_msg)
# 等待ROS消息
ros.spin()
# 关闭ROS节点
ros.terminate()
```
相关问题
Python中roslibpy 获取小车坐标并打印出来
可以使用如下代码:
```python
import rospy
from roslibpy import Topic
# create a ROS node
rospy.init_node('get_car_position')
# create a topic for subscribing the car's position
car_position_topic = Topic(rospy, '/car_position', 'geometry_msgs/PointStamped')
# define a callback function to print the car's position
def print_car_position(message):
x = message['point']['x']
y = message['point']['y']
z = message['point']['z']
print('Car position: x={}, y={}, z={}'.format(x, y, z))
# subscribe to the car's position topic
car_position_topic.subscribe(print_car_position)
# spin the ROS node to keep it alive
rospy.spin()
```
此代码使用roslibpy库中的Topic类来订阅小车位置主题。订阅后,每当有位置信息时,将调用print_car_position函数打印出位置信息。
Python中roslibpy 获取小车坐标
可以使用以下代码获取小车的坐标:
```python
import roslibpy
client = roslibpy.Ros(host='localhost', port=9090)
client.run()
# Subscribe to the topic that provides the car's position
position_topic = roslibpy.Topic(client, '/car/position', 'geometry_msgs/Point')
position_msg = roslibpy.Message({
'x': 0.0,
'y': 0.0,
'z': 0.0
})
def position_callback(message):
position_msg = message
print('Robot position:', position_msg)
position_topic.subscribe(position_callback)
# Wait for messages
while position_topic.is_subscribed:
client.spin_once()
client.terminate()
```
在这里,我们使用了`roslibpy` Python库来连接`ROS`主机,并订阅了一个提供汽车位置信息的主题。每次收到消息时,回调函数`position_callback()`都会打印收到的消息,包括小车的坐标。
阅读全文