def create_pose(self, x, y): pose = PoseStamped() pose.header.stamp = rospy.Time.now() pose.pose.position.x = y pose.pose.position.y = x self.msg_epath.poses.append(pose)

这段代码是一个方法，用于创建一个姿态对象，并将其添加到self.msg_epath.poses列表中。

首先，创建了一个PoseStamped类型的对象pose。

然后，设置pose的时间戳为当前的rospy时间。

接着，将传入的x和y坐标分别赋值给pose.pose.position.y和pose.pose.position.x。

最后，将pose添加到self.msg_epath.poses列表中。这个方法的作用可能是将一个姿态对象添加到路径消息的姿态列表中。

相关问题

将下列Python代码更正local_pos_pub3 = rospy.Publisher('mavros/setpoint_position/local', PoseStamped, queue_size=10) # poscom = PoseStamped() #消息类型PositionCommand() 改成PoseStamped() rate = rospy.Rate(20.0) i = 0 while not rospy.is_shutdown(): poscom.header.stamp = rospy.Time.now() poscom.header.frame_id = "world" poscom.pose.position.x = 2.5 * math.sin(math.pi * i / 400) poscom.pose.position.y = 5 * math.sin(math.pi * i / 800) poscom.pose.position.z = 2 poscom_twist = TwistStamped() poscom_twist.header.stamp = rospy.Time.now() poscom_twist.header.frame_id = "base_link" poscom_twist.twist.linear.x = 0 poscom_twist.twist.linear.y = 0 poscom_twist.twist.linear.z = 0 poscom_twist.twist.angular.x = 0 poscom_twist.twist.angular.y = 0 poscom_twist.twist.angular.z = 0 local_pos_pub3.publish(poscom) local_pos_pub4.publish(poscom_twist)

根据你的描述，需要将代码中的 `poscom = PositionCommand()` 改为 `poscom = PoseStamped()`，并且需要添加对 `local_pos_pub4` 的定义。下面是更正后的代码：

local_pos_pub3 = rospy.Publisher('mavros/setpoint_position/local', PoseStamped, queue_size=10)
local_pos_pub4 = rospy.Publisher('topic_name', TwistStamped, queue_size=10) # 定义 local_pos_pub4
poscom = PoseStamped() # 改为 PoseStamped()
rate = rospy.Rate(20.0)
i = 0

while not rospy.is_shutdown():
    poscom.header.stamp = rospy.Time.now()
    poscom.header.frame_id = "world"
    poscom.pose.position.x = 2.5 * math.sin(math.pi * i / 400)
    poscom.pose.position.y = 5 * math.sin(math.pi * i / 800)
    poscom.pose.position.z = 2

    poscom_twist = TwistStamped()
    poscom_twist.header.stamp = rospy.Time.now()
    poscom_twist.header.frame_id = "base_link"
    poscom_twist.twist.linear.x = 0
    poscom_twist.twist.linear.y = 0
    poscom_twist.twist.linear.z = 0
    poscom_twist.twist.angular.x = 0
    poscom_twist.twist.angular.y = 0
    poscom_twist.twist.angular.z = 0

    local_pos_pub3.publish(poscom)
    local_pos_pub4.publish(poscom_twist)
    
    i += 1
    rate.sleep()

注意，`local_pos_pub4` 的定义语句中的 `topic_name` 需要替换成实际的话题名称。

bool MoveObject::goObject() { //connet to the Server, 5s limit while (!move_base.waitForServer(ros::Duration(5.0))) { ROS_INFO("Waiting for move_base action server..."); } ROS_INFO("Connected to move base server"); /t the targetpose move_base_msgs::MoveBaseGoal goal; goal.target_pose.header.frame_id = "map"; goal.target_pose.header.stamp = ros::Time::now(); // goal.target_pose.pose.position.x = Obj_pose.pose.position.x; // goal.target_pose.pose.position.y = Obj_pose.pose.position.y; // target_odom_point.pose.pose.position.x=goal.target_pose.pose.position.x // target_odom_point.pose.pose.position.y=goal.target_pose.pose.position.y target_odom_point.pose.pose.position.x=Obj_pose.pose.position.x; target_odom_point.pose.pose.position.y=Obj_pose.pose.position.y; cout << goal.target_pose.pose.position.x << endl; cout << goal.target_pose.pose.position.y << endl; //goal.target_pose.pose.orientation = tf::createQuaternionMsgFromYaw(g.response.yaw); goal.target_pose.pose.orientation.z = 0.0; goal.target_pose.pose.orientation.w = 1.0; tf::quaternionMsgToTF(target_odom_point.pose.orientation, quat); tf::Matrix3x3(quat).getRPY(roll, pitch, yaw);//进行转换 yaw +=1.5708;//旋转90 target_odom_point.pose.position.x -=keep_distance*cos(yaw); target_odom_point.pose.position.y -=keep_distance*sin(yaw); goal.target_pose.pose.position.x=target_odom_point.pose.pose.position.x goal.target_pose.pose.position.y=target_odom_point.pose.pose.position.y target_odom_point.pose.orientation = tf::createQuaternionMsgFromYaw(yaw); ROS_INFO("Sending goal"); move_base.sendGoal(goal); move_base.waitForResult(); if (move_base.getState() == actionlib::SimpleClientGoalState::SUCCEEDED) { ROS_INFO("Goal succeeded!"); return true; } else { ROS_INFO("Goal failed"); return false; } }

这段代码是一个移动机器人到目标点的函数。首先会等待 move_base action server 的连接，如果在 5 秒内没有连接成功，则会输出 "Waiting for move_base action server..."。如果连接成功，则会输出 "Connected to move base server"。

接下来，设置目标点的坐标和姿态，这里的目标点是以地图为参考系的。然后通过计算机器人需要旋转的角度，将目标点向机器人前进方向偏移一定距离，即目标点距离机器人保持一定距离。最后通过 move_base.sendGoal(goal) 发送目标点，等待机器人到达目标点，如果成功到达则返回 true，否则返回 false。