如何用Python实现rviz定点导航

可以使用ROS中的Python库rospy来实现rviz定点导航。具体步骤如下：

1. 导入必要的库

import rospy
from geometry_msgs.msg import PoseStamped
from move_base_msgs.msg import MoveBaseAction, MoveBaseGoal

2. 初始化ROS节点

rospy.init_node('rviz_navigation', anonymous=True)

3. 创建MoveBaseAction的发布者

move_base = actionlib.SimpleActionClient("move_base", MoveBaseAction)
move_base.wait_for_server(rospy.Duration(5))

4. 创建一个PoseStamped对象，设置导航目标点的坐标

goal = PoseStamped()
goal.header.frame_id = "map"
goal.pose.position.x = 1.0
goal.pose.position.y = 2.0
goal.pose.orientation.w = 1.0

5. 创建MoveBaseGoal对象，将目标点设置为该对象的目标

mb_goal = MoveBaseGoal()
mb_goal.target_pose = goal

6. 发布MoveBaseGoal对象，启动导航

move_base.send_goal(mb_goal)
move_base.wait_for_result(rospy.Duration(60))

以上就是用Python实现rviz定点导航的基本步骤。