编写本笔记原因：
源码编译没问题，但是在运行roslaunch turtlebot3_slam turtlebot3_slam.launch slam_methods:=cartgrapher时出现下面这个错误：
RLException: [turtlebot3_slam] is neither a launch file in package [turtlebot3_slam] nor is [turtlebot3_slam] a launch file name The traceback for the exception was written to the log file
去掉slam_methods:=cartgrapher后，运行成功
工作空间中下载turtlebot3源码：
git clone https://github.com/ROBOTIS-GIT/turtlebot3_msgs.git
git clone https://github.com/ROBOTIS-GIT/turtlebot3.git
git clone https://github.com/ROBOTIS-GIT/turtlebot3_simulations.git
catkin_make 编译后
环境变量设置到.bashrc文件中，该变量会在不少launch文件中调用，且在仿真过程中会开几个终端，因此设置
echo "export TURTLEBOT3_MODEL=burger" >> ~/.bashrc
1、建图
运行
roslaunch turtlebot3_gazebo turtlebot3_world.launch
启动gmapping仿真，我是在这里出现问题的，slam_methods默认好像就是gmapping，最后赋值语句貌似可以不用
roslaunch turtlebot3_slam turtlebot3_slam.launch slam_methods:=gmapping
启动键盘控制节点
rosrun teleop_twist_keyboard teleop_twist_keyboard.py
控制小车将地图浏览个遍，然后执行下面的命令存图，后面~/map为保存的地图路径
rosrun map_server map_saver -f ~/map
2、运行
其中map_file:=$HOME/map.yaml为设置地图路径
roslaunch turtlebot3_gazebo turtlebot3_world.launch
roslaunch turtlebot3_navigation turtlebot3_navigation.launch map_file:=$HOME/map.yaml
3、附加：
将turtlebot3_world.launch改为turtlebot3_house.launch再仿真一次
通过RVIZ 的 2D Nav Goal 设置目标点以及方向，这里等待十来秒，小车自行运动。
https://blog.csdn.net/qq_41821678/article/details/125763992
https://blog.csdn.net/qq_41821678/article/details/125711393
https://blog.csdn.net/gezongbo/article/details/123388655
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