ros2 循环播放rosbag
时间: 2024-06-23 20:01:11 浏览: 369
ROS 2(Robot Operating System)是一个开源的机器人操作系统,主要用于构建复杂机器人系统。如果你想在 ROS2 中循环播放 rosbag(ROS 包含的记录的通信数据),你可以使用 `rclcpp` 和 `rclcpp_action` 的一些工具,如 `rclcpp::spin()` 和 `rclcpp::executors::SingleThreadedExecutor` 结合 `rosbag2::PlayBack`。
以下是一个简单的步骤和代码示例:
1. 首先,你需要安装 `ros2 bag play` 包,可以通过包管理器 `ros2` 命令行工具安装:
```
ros2 package update
ros2 package install rosbag2_common rosbag2_msg rosbag2_node rosbag2_py
```
2. 创建一个节点,引入所需的库:
```cpp
#include <rclcpp/rclcpp.hpp>
#include <rclcpp_action/client.hpp>
#include <rosbag2/bag.hpp>
#include <rosbag2/reader.hpp>
#include <rosbag2_msgs/msg/BagInfo.hpp>
```
3. 定义一个循环播放 rosbag 的函数:
```cpp
class RosbagPlayer : public rclcpp::Node
{
public:
RosbagPlayer(const std::string& bag_file)
: node_(rclcpp::Node::make_shared("rosbag_player", bag_file))
{
// 创建播放客户端
auto playback_client = rclcpp_action::create_client<rosbag2_msgs::msg::Play>(node_, "play");
while (!playback_client->wait_for_server(std::chrono::seconds(5))) {
RCLCPP_INFO(node_->get_logger(), "Waiting for play action server to become available");
}
// 准备播放动作
auto goal = rosbag2_msgs::msg::Play::goal();
goal.bag = bag_file;
// 开始循环播放
auto future = playback_client->async_send_goal(goal);
future.add_done_callback([this](rclcpp::Future<rosbag2_msgs::msg::Play::Result>&& result) {
if (rclcpp::executor::is Ok(result)) {
rclcpp::spin_some(node_);
} else {
RCLCPP_ERROR(node_->get_logger(), "Failed to send goal: %s", result.exception().message());
}
});
}
private:
rclcpp::Node::SharedPtr node_;
};
```
4. 在 `main()` 函数中创建并启动 RosbagPlayer:
```cpp
int main(int argc, char** argv)
{
rclcpp::init(argc, argv);
auto player = RosbagPlayer(argv);
rclcpp::spin(player);
rclcpp::shutdown();
return 0;
}
```
在运行程序时,传入你想要循环播放的 rosbag 文件名作为命令行参数,例如:
```
./your_node_name your_rosbag_file.bag
```
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