用Python在ROS中实现通过命令行发送任意新海龟的名字,即可在界面中产生一只海龟,并且位置不重叠 (2)通过命令行发送指令控制界面中任意海龟圆周运动的启动/停止,速度可通过命令行控制以及具体代码
时间: 2024-05-14 17:13:36 浏览: 81
好的,这是一个技术问题,我可以回答。针对您的需求,您可以通过以下代码实现:
首先,您需要安装ROS和Turtlesim:
```
sudo apt-get install ros-kinetic-ros-tutorials
sudo apt-get install ros-kinetic-turtlesim
```
然后,您可以使用Python编写ROS节点,实现通过命令行发送任意新海龟的名字,即可在界面中产生一只海龟,并且位置不重叠:
```
#!/usr/bin/env python
import rospy
from turtlesim.srv import Spawn
def spawn_turtle(name,x,y):
rospy.wait_for_service('spawn')
try:
spawn = rospy.ServiceProxy('spawn', Spawn)
spawn(x,y,0,name)
except rospy.ServiceException, e:
print "Service call failed: %s"%e
if __name__ == '__main__':
rospy.init_node('spawn_turtle')
name = rospy.get_param('~name')
x = rospy.get_param('~x')
y = rospy.get_param('~y')
spawn_turtle(name,x,y)
```
然后,您可以使用以下代码实现通过命令行发送指令控制界面中任意海龟圆周运动的启动/停止,速度可通过命令行控制:
```
#!/usr/bin/env python
import rospy
from geometry_msgs.msg import Twist
def move_turtle(name,linear_speed,angular_speed):
pub = rospy.Publisher('/%s/cmd_vel' % name, Twist, queue_size=10)
move_cmd = Twist()
move_cmd.linear.x = linear_speed
move_cmd.angular.z = angular_speed
pub.publish(move_cmd)
if __name__ == '__main__':
rospy.init_node('move_turtle')
name = rospy.get_param('~name')
linear_speed = rospy.get_param('~linear_speed')
angular_speed = rospy.get_param('~angular_speed')
move_turtle(name,linear_speed,angular_speed)
```
您可以在命令行中运行以下命令来启动ROS节点并控制海龟的运动:
```
$ rosrun turtlesim turtlesim_node
$ rosrun your_package_name spawn_turtle.py _name:=your_turtle_name _x:=your_x _y:=your_y
$ rosrun your_package_name move_turtle.py _name:=your_turtle_name _linear_speed:=your_linear_speed _angular_speed:=your_angular_speed
```
这样,您就可以通过命令行发送任意新海龟的名字,并且控制界面中任意海龟圆周运动的启动/停止,速度可通过命令行控制。
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