feat: add lms-nav2-gazebo-simulator module

src/turtlebot3_gazebo/launch/empty_world.launch.py

@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+#
+# Copyright 2019 ROBOTIS CO., LTD.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Authors: Joep Tool
+
+import os
+
+from ament_index_python.packages import get_package_share_directory
+from launch import LaunchDescription
+from launch.actions import IncludeLaunchDescription
+from launch.launch_description_sources import PythonLaunchDescriptionSource
+from launch.substitutions import LaunchConfiguration
+
+
+def generate_launch_description():
+    launch_file_dir = os.path.join(get_package_share_directory('turtlebot3_gazebo'), 'launch')
+    pkg_gazebo_ros = get_package_share_directory('gazebo_ros')
+
+    use_sim_time = LaunchConfiguration('use_sim_time', default='true')
+    x_pose = LaunchConfiguration('x_pose', default='0.0')
+    y_pose = LaunchConfiguration('y_pose', default='0.0')
+
+    world = os.path.join(
+        get_package_share_directory('turtlebot3_gazebo'),
+        'worlds',
+        'empty_world.world'
+    )
+
+    gzserver_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzserver.launch.py')
+        ),
+        launch_arguments={'world': world}.items()
+    )
+
+    gzclient_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzclient.launch.py')
+        )
+    )
+
+    robot_state_publisher_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'robot_state_publisher.launch.py')
+        ),
+        launch_arguments={'use_sim_time': use_sim_time}.items()
+    )
+
+    spawn_turtlebot_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'spawn_turtlebot3.launch.py')
+        ),
+        launch_arguments={
+            'x_pose': x_pose,
+            'y_pose': y_pose
+        }.items()
+    )
+
+    ld = LaunchDescription()
+
+    # Add the commands to the launch description
+    ld.add_action(gzserver_cmd)
+    ld.add_action(gzclient_cmd)
+    ld.add_action(robot_state_publisher_cmd)
+    ld.add_action(spawn_turtlebot_cmd)
+
+    return ld

src/turtlebot3_gazebo/launch/multi_robot.launch.py

@@ -0,0 +1,137 @@
+#!/usr/bin/env python3
+#
+# Copyright 2019 ROBOTIS CO., LTD.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Authors: Joep Tool, HyunGyu Kim
+
+import os
+import xml.etree.ElementTree as ET
+
+from ament_index_python.packages import get_package_share_directory
+from launch import LaunchDescription
+from launch.actions import GroupAction
+from launch.actions import IncludeLaunchDescription
+from launch.actions import RegisterEventHandler
+from launch.event_handlers import OnShutdown
+from launch.launch_description_sources import PythonLaunchDescriptionSource
+from launch.substitutions import LaunchConfiguration
+from launch_ros.actions import PushRosNamespace
+
+
+def generate_launch_description():
+    TURTLEBOT3_MODEL = os.environ['TURTLEBOT3_MODEL']
+
+    number_of_robots = 4
+    namespace = 'TB3'
+    pose = [[-2, -0.5], [0.5, -2], [2, 0.5], [-0.5, 2]]
+    model_folder = 'turtlebot3_' + TURTLEBOT3_MODEL
+    urdf_path = os.path.join(
+        get_package_share_directory('turtlebot3_gazebo'),
+        'models',
+        model_folder,
+        'model.sdf'
+    )
+    save_path = os.path.join(
+        get_package_share_directory('turtlebot3_gazebo'),
+        'models',
+        model_folder,
+        'tmp'
+    )
+    launch_file_dir = os.path.join(get_package_share_directory('turtlebot3_gazebo'), 'launch')
+    pkg_gazebo_ros = get_package_share_directory('gazebo_ros')
+
+    use_sim_time = LaunchConfiguration('use_sim_time', default='false')
+
+    world = os.path.join(
+        get_package_share_directory('turtlebot3_gazebo'),
+        'worlds',
+        'turtlebot3_world.world'
+    )
+
+    gzserver_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzserver.launch.py')
+        ),
+        launch_arguments={'world': world}.items()
+    )
+
+    gzclient_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzclient.launch.py')
+        )
+    )
+
+    robot_state_publisher_cmd_list = []
+
+    for count in range(number_of_robots):
+        robot_state_publisher_cmd_list.append(
+            IncludeLaunchDescription(
+                PythonLaunchDescriptionSource(
+                    os.path.join(launch_file_dir, 'robot_state_publisher.launch.py')
+                ),
+                launch_arguments={
+                    'use_sim_time': use_sim_time,
+                    'frame_prefix': f'{namespace}_{count+1}'
+                    }.items()
+            )
+        )
+
+    spawn_turtlebot_cmd_list = []
+
+    for count in range(number_of_robots):
+        tree = ET.parse(urdf_path)
+        root = tree.getroot()
+        for odom_frame_tag in root.iter('odometry_frame'):
+            odom_frame_tag.text = f'{namespace}_{count+1}/odom'
+        for base_frame_tag in root.iter('robot_base_frame'):
+            base_frame_tag.text = f'{namespace}_{count+1}/base_footprint'
+        for scan_frame_tag in root.iter('frame_name'):
+            scan_frame_tag.text = f'{namespace}_{count+1}/base_scan'
+        urdf_modified = ET.tostring(tree.getroot(), encoding='unicode')
+        urdf_modified = '<?xml version="1.0" ?>\n'+urdf_modified
+        with open(f'{save_path}{count+1}.sdf', 'w') as file:
+            file.write(urdf_modified)
+
+        spawn_turtlebot_cmd_list.append(
+            IncludeLaunchDescription(
+                PythonLaunchDescriptionSource(
+                    os.path.join(launch_file_dir, 'multi_spawn_turtlebot3.launch.py')
+                ),
+                launch_arguments={
+                        'x_pose': str(pose[count][0]),
+                        'y_pose': str(pose[count][1]),
+                        'robot_name': f'{TURTLEBOT3_MODEL}_{count+1}',
+                        'namespace': f'{namespace}_{count+1}',
+                        'sdf_path': f'{save_path}{count+1}.sdf'
+                }.items()
+            )
+        )
+
+    ld = LaunchDescription()
+    # Add the commands to the launch description
+    ld.add_action(gzserver_cmd)
+    ld.add_action(gzclient_cmd)
+    ld.add_action(RegisterEventHandler(
+        OnShutdown(
+            on_shutdown=lambda event,
+            context: [os.remove(f'{save_path}{count+1}.sdf') for count in range(number_of_robots)]
+        )
+    ))
+    for count, spawn_turtlebot_cmd in enumerate(spawn_turtlebot_cmd_list, start=1):
+        ld.add_action(GroupAction([PushRosNamespace(f'{namespace}_{count}'),
+                                  robot_state_publisher_cmd_list[count-1],
+                                  spawn_turtlebot_cmd]))
+
+    return ld

src/turtlebot3_gazebo/launch/multi_spawn_turtlebot3.launch.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+# Copyright 2019 Open Source Robotics Foundation, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Authors: HyunGyu Kim
+
+import os
+
+from launch import LaunchDescription
+from launch.actions import DeclareLaunchArgument
+from launch.substitutions import LaunchConfiguration
+from launch_ros.actions import Node
+
+
+def generate_launch_description():
+    TURTLEBOT3_MODEL = os.environ['TURTLEBOT3_MODEL']
+
+    x_pose = LaunchConfiguration('x_pose', default='0.0')
+    y_pose = LaunchConfiguration('y_pose', default='0.0')
+    robot_name = LaunchConfiguration('robot_name', default=TURTLEBOT3_MODEL)
+    namespace = LaunchConfiguration('namespace', default='')
+    sdf_path = LaunchConfiguration('sdf_path', default='')
+
+    declare_x_position_cmd = DeclareLaunchArgument(
+        'x_pose', default_value='0.0',
+        description='Specify namespace of the robot')
+
+    declare_y_position_cmd = DeclareLaunchArgument(
+        'y_pose', default_value='0.0',
+        description='Specify namespace of the robot')
+    start_gazebo_ros_spawner_cmd = Node(
+        package='gazebo_ros',
+        executable='spawn_entity.py',
+        arguments=[
+            '-entity', robot_name,
+            '-file', sdf_path,
+            '-x', x_pose,
+            '-y', y_pose,
+            '-z', '0.01',
+            '-robot_namespace', namespace
+        ],
+        output='screen',
+    )
+
+    ld = LaunchDescription()
+    ld.add_action(declare_x_position_cmd)
+    ld.add_action(declare_y_position_cmd)
+    ld.add_action(start_gazebo_ros_spawner_cmd)
+    return ld

src/turtlebot3_gazebo/launch/robot_state_publisher.launch.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+#
+# Copyright 2019 ROBOTIS CO., LTD.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Authors: Darby Lim
+
+import os
+
+from ament_index_python.packages import get_package_share_directory
+from launch import LaunchDescription
+from launch.actions import DeclareLaunchArgument
+from launch.substitutions import LaunchConfiguration
+from launch.substitutions import PythonExpression
+from launch_ros.actions import Node
+
+
+def generate_launch_description():
+    TURTLEBOT3_MODEL = os.environ['TURTLEBOT3_MODEL']
+
+    use_sim_time = LaunchConfiguration('use_sim_time', default='true')
+    urdf_file_name = 'turtlebot3_' + TURTLEBOT3_MODEL + '.urdf'
+    frame_prefix = LaunchConfiguration('frame_prefix', default='')
+
+    print('urdf_file_name : {}'.format(urdf_file_name))
+
+    urdf_path = os.path.join(
+        get_package_share_directory('turtlebot3_description'),
+        'urdf',
+        urdf_file_name)
+
+    with open(urdf_path, 'r') as infp:
+        robot_desc = infp.read()
+
+    return LaunchDescription([
+        DeclareLaunchArgument(
+            'use_sim_time',
+            default_value='false',
+            description='Use simulation (Gazebo) clock if true'),
+        Node(
+            package='robot_state_publisher',
+            executable='robot_state_publisher',
+            name='robot_state_publisher',
+            output='screen',
+            parameters=[{
+                'use_sim_time': use_sim_time,
+                'robot_description': robot_desc,
+                'frame_prefix': PythonExpression(["'", frame_prefix, "/'"])
+            }],
+        ),
+    ])

src/turtlebot3_gazebo/launch/spawn_turtlebot3.launch.py

@@ -0,0 +1,70 @@
+# Copyright 2019 Open Source Robotics Foundation, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+
+from ament_index_python.packages import get_package_share_directory
+from launch import LaunchDescription
+from launch.actions import DeclareLaunchArgument
+from launch.substitutions import LaunchConfiguration
+from launch_ros.actions import Node
+
+
+def generate_launch_description():
+    # Get the urdf file
+    TURTLEBOT3_MODEL = os.environ['TURTLEBOT3_MODEL']
+    model_folder = 'turtlebot3_' + TURTLEBOT3_MODEL
+    urdf_path = os.path.join(
+        get_package_share_directory('turtlebot3_gazebo'),
+        'models',
+        model_folder,
+        'model.sdf'
+    )
+
+    # Launch configuration variables specific to simulation
+    x_pose = LaunchConfiguration('x_pose', default='0.0')
+    y_pose = LaunchConfiguration('y_pose', default='0.0')
+
+    # Declare the launch arguments
+    declare_x_position_cmd = DeclareLaunchArgument(
+        'x_pose', default_value='0.0',
+        description='Specify namespace of the robot')
+
+    declare_y_position_cmd = DeclareLaunchArgument(
+        'y_pose', default_value='0.0',
+        description='Specify namespace of the robot')
+
+    start_gazebo_ros_spawner_cmd = Node(
+        package='gazebo_ros',
+        executable='spawn_entity.py',
+        arguments=[
+            '-entity', TURTLEBOT3_MODEL,
+            '-file', urdf_path,
+            '-x', x_pose,
+            '-y', y_pose,
+            '-z', '0.01'
+        ],
+        output='screen',
+    )
+
+    ld = LaunchDescription()
+
+    # Declare the launch options
+    ld.add_action(declare_x_position_cmd)
+    ld.add_action(declare_y_position_cmd)
+
+    # Add any conditioned actions
+    ld.add_action(start_gazebo_ros_spawner_cmd)
+
+    return ld

src/turtlebot3_gazebo/launch/turtlebot3_autorace_2020.launch.py

@@ -0,0 +1,77 @@
+#!/usr/bin/env python3
+#
+# Copyright 2019 ROBOTIS CO., LTD.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Authors: Joep Tool, Hyungyu Kim
+
+import os
+
+from ament_index_python.packages import get_package_share_directory
+from launch import LaunchDescription
+from launch.actions import IncludeLaunchDescription
+from launch.launch_description_sources import PythonLaunchDescriptionSource
+from launch.substitutions import LaunchConfiguration
+
+
+def generate_launch_description():
+    launch_file_dir = os.path.join(get_package_share_directory('turtlebot3_gazebo'), 'launch')
+    pkg_gazebo_ros = get_package_share_directory('gazebo_ros')
+
+    use_sim_time = LaunchConfiguration('use_sim_time', default='true')
+    x_pose = LaunchConfiguration('x_pose', default='0.8')
+    y_pose = LaunchConfiguration('y_pose', default='-1.747')
+
+    world = os.path.join(
+        get_package_share_directory('turtlebot3_gazebo'),
+        'worlds',
+        'turtlebot3_autorace_2020.world'
+    )
+
+    gzserver_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzserver.launch.py')
+        ),
+        launch_arguments={'world': world}.items()
+    )
+
+    gzclient_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzclient.launch.py')
+        )
+    )
+
+    robot_state_publisher_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'robot_state_publisher.launch.py')
+        ),
+        launch_arguments={'use_sim_time': use_sim_time}.items()
+    )
+
+    spawn_turtlebot_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'spawn_turtlebot3.launch.py')
+        ),
+        launch_arguments={
+            'x_pose': x_pose,
+            'y_pose': y_pose
+        }.items()
+    )
+
+    ld = LaunchDescription()
+    ld.add_action(gzserver_cmd)
+    ld.add_action(gzclient_cmd)
+    ld.add_action(robot_state_publisher_cmd)
+    ld.add_action(spawn_turtlebot_cmd)
+    return ld

src/turtlebot3_gazebo/launch/turtlebot3_dqn_stage1.launch.py

@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+#
+# Copyright 2019 ROBOTIS CO., LTD.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Authors: Joep Tool
+
+import os
+
+from ament_index_python.packages import get_package_share_directory
+from launch import LaunchDescription
+from launch.actions import IncludeLaunchDescription
+from launch.launch_description_sources import PythonLaunchDescriptionSource
+from launch.substitutions import LaunchConfiguration
+
+
+def generate_launch_description():
+    launch_file_dir = os.path.join(get_package_share_directory('turtlebot3_gazebo'), 'launch')
+    pkg_gazebo_ros = get_package_share_directory('gazebo_ros')
+
+    use_sim_time = LaunchConfiguration('use_sim_time', default='true')
+    x_pose = LaunchConfiguration('x_pose', default='0.0')
+    y_pose = LaunchConfiguration('y_pose', default='0.0')
+
+    world = os.path.join(
+        get_package_share_directory('turtlebot3_gazebo'),
+        'worlds',
+        'turtlebot3_dqn_stage1.world'
+    )
+
+    gzserver_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzserver.launch.py')
+        ),
+        launch_arguments={'world': world}.items()
+    )
+
+    gzclient_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzclient.launch.py')
+        )
+    )
+
+    robot_state_publisher_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'robot_state_publisher.launch.py')
+        ),
+        launch_arguments={'use_sim_time': use_sim_time}.items()
+    )
+
+    spawn_turtlebot_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'spawn_turtlebot3.launch.py')
+        ),
+        launch_arguments={
+            'x_pose': x_pose,
+            'y_pose': y_pose
+        }.items()
+    )
+
+    ld = LaunchDescription()
+
+    # Add the commands to the launch description
+    ld.add_action(gzserver_cmd)
+    ld.add_action(gzclient_cmd)
+    ld.add_action(robot_state_publisher_cmd)
+    ld.add_action(spawn_turtlebot_cmd)
+
+    return ld

src/turtlebot3_gazebo/launch/turtlebot3_dqn_stage2.launch.py

@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+#
+# Copyright 2019 ROBOTIS CO., LTD.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Authors: Joep Tool
+
+import os
+
+from ament_index_python.packages import get_package_share_directory
+from launch import LaunchDescription
+from launch.actions import IncludeLaunchDescription
+from launch.launch_description_sources import PythonLaunchDescriptionSource
+from launch.substitutions import LaunchConfiguration
+
+
+def generate_launch_description():
+    launch_file_dir = os.path.join(get_package_share_directory('turtlebot3_gazebo'), 'launch')
+    pkg_gazebo_ros = get_package_share_directory('gazebo_ros')
+
+    use_sim_time = LaunchConfiguration('use_sim_time', default='true')
+    x_pose = LaunchConfiguration('x_pose', default='0.0')
+    y_pose = LaunchConfiguration('y_pose', default='0.0')
+
+    world = os.path.join(
+        get_package_share_directory('turtlebot3_gazebo'),
+        'worlds',
+        'turtlebot3_dqn_stage2.world'
+    )
+
+    gzserver_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzserver.launch.py')
+        ),
+        launch_arguments={'world': world}.items()
+    )
+
+    gzclient_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzclient.launch.py')
+        )
+    )
+
+    robot_state_publisher_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'robot_state_publisher.launch.py')
+        ),
+        launch_arguments={'use_sim_time': use_sim_time}.items()
+    )
+
+    spawn_turtlebot_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'spawn_turtlebot3.launch.py')
+        ),
+        launch_arguments={
+            'x_pose': x_pose,
+            'y_pose': y_pose
+        }.items()
+    )
+
+    ld = LaunchDescription()
+
+    # Add the commands to the launch description
+    ld.add_action(gzserver_cmd)
+    ld.add_action(gzclient_cmd)
+    ld.add_action(robot_state_publisher_cmd)
+    ld.add_action(spawn_turtlebot_cmd)
+
+    return ld

src/turtlebot3_gazebo/launch/turtlebot3_dqn_stage3.launch.py

@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+#
+# Copyright 2019 ROBOTIS CO., LTD.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Authors: Joep Tool
+
+import os
+
+from ament_index_python.packages import get_package_share_directory
+from launch import LaunchDescription
+from launch.actions import IncludeLaunchDescription
+from launch.launch_description_sources import PythonLaunchDescriptionSource
+from launch.substitutions import LaunchConfiguration
+
+
+def generate_launch_description():
+    launch_file_dir = os.path.join(get_package_share_directory('turtlebot3_gazebo'), 'launch')
+    pkg_gazebo_ros = get_package_share_directory('gazebo_ros')
+
+    use_sim_time = LaunchConfiguration('use_sim_time', default='true')
+    x_pose = LaunchConfiguration('x_pose', default='0.0')
+    y_pose = LaunchConfiguration('y_pose', default='0.0')
+
+    world = os.path.join(
+        get_package_share_directory('turtlebot3_gazebo'),
+        'worlds',
+        'turtlebot3_dqn_stage3.world'
+    )
+
+    gzserver_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzserver.launch.py')
+        ),
+        launch_arguments={'world': world}.items()
+    )
+
+    gzclient_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzclient.launch.py')
+        )
+    )
+
+    robot_state_publisher_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'robot_state_publisher.launch.py')
+        ),
+        launch_arguments={'use_sim_time': use_sim_time}.items()
+    )
+
+    spawn_turtlebot_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'spawn_turtlebot3.launch.py')
+        ),
+        launch_arguments={
+            'x_pose': x_pose,
+            'y_pose': y_pose
+        }.items()
+    )
+
+    ld = LaunchDescription()
+
+    # Add the commands to the launch description
+    ld.add_action(gzserver_cmd)
+    ld.add_action(gzclient_cmd)
+    ld.add_action(robot_state_publisher_cmd)
+    ld.add_action(spawn_turtlebot_cmd)
+
+    return ld

src/turtlebot3_gazebo/launch/turtlebot3_dqn_stage4.launch.py

@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+#
+# Copyright 2019 ROBOTIS CO., LTD.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Authors: Joep Tool
+
+import os
+
+from ament_index_python.packages import get_package_share_directory
+from launch import LaunchDescription
+from launch.actions import IncludeLaunchDescription
+from launch.launch_description_sources import PythonLaunchDescriptionSource
+from launch.substitutions import LaunchConfiguration
+
+
+def generate_launch_description():
+    launch_file_dir = os.path.join(get_package_share_directory('turtlebot3_gazebo'), 'launch')
+    pkg_gazebo_ros = get_package_share_directory('gazebo_ros')
+
+    use_sim_time = LaunchConfiguration('use_sim_time', default='true')
+    x_pose = LaunchConfiguration('x_pose', default='0.0')
+    y_pose = LaunchConfiguration('y_pose', default='0.0')
+
+    world = os.path.join(
+        get_package_share_directory('turtlebot3_gazebo'),
+        'worlds',
+        'turtlebot3_dqn_stage4.world'
+    )
+
+    gzserver_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzserver.launch.py')
+        ),
+        launch_arguments={'world': world}.items()
+    )
+
+    gzclient_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzclient.launch.py')
+        )
+    )
+
+    robot_state_publisher_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'robot_state_publisher.launch.py')
+        ),
+        launch_arguments={'use_sim_time': use_sim_time}.items()
+    )
+
+    spawn_turtlebot_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'spawn_turtlebot3.launch.py')
+        ),
+        launch_arguments={
+            'x_pose': x_pose,
+            'y_pose': y_pose
+        }.items()
+    )
+
+    ld = LaunchDescription()
+
+    # Add the commands to the launch description
+    ld.add_action(gzserver_cmd)
+    ld.add_action(gzclient_cmd)
+    ld.add_action(robot_state_publisher_cmd)
+    ld.add_action(spawn_turtlebot_cmd)
+
+    return ld

src/turtlebot3_gazebo/launch/turtlebot3_house.launch.py

@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+#
+# Copyright 2019 ROBOTIS CO., LTD.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Authors: Joep Tool
+
+import os
+
+from ament_index_python.packages import get_package_share_directory
+from launch import LaunchDescription
+from launch.actions import IncludeLaunchDescription
+from launch.launch_description_sources import PythonLaunchDescriptionSource
+from launch.substitutions import LaunchConfiguration
+
+
+def generate_launch_description():
+    launch_file_dir = os.path.join(get_package_share_directory('turtlebot3_gazebo'), 'launch')
+    pkg_gazebo_ros = get_package_share_directory('gazebo_ros')
+
+    use_sim_time = LaunchConfiguration('use_sim_time', default='true')
+    x_pose = LaunchConfiguration('x_pose', default='-2.0')
+    y_pose = LaunchConfiguration('y_pose', default='-0.5')
+
+    world = os.path.join(
+        get_package_share_directory('turtlebot3_gazebo'),
+        'worlds',
+        'turtlebot3_house.world'
+    )
+
+    gzserver_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzserver.launch.py')
+        ),
+        launch_arguments={'world': world}.items()
+    )
+
+    gzclient_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzclient.launch.py')
+        )
+    )
+
+    robot_state_publisher_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'robot_state_publisher.launch.py')
+        ),
+        launch_arguments={'use_sim_time': use_sim_time}.items()
+    )
+
+    spawn_turtlebot_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'spawn_turtlebot3.launch.py')
+        ),
+        launch_arguments={
+            'x_pose': x_pose,
+            'y_pose': y_pose
+        }.items()
+    )
+
+    ld = LaunchDescription()
+
+    # Add the commands to the launch description
+    ld.add_action(gzserver_cmd)
+    ld.add_action(gzclient_cmd)
+    ld.add_action(robot_state_publisher_cmd)
+    ld.add_action(spawn_turtlebot_cmd)
+
+    return ld

src/turtlebot3_gazebo/launch/turtlebot3_world.launch.py

@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+#
+# Copyright 2019 ROBOTIS CO., LTD.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Authors: Joep Tool
+
+import os
+
+from ament_index_python.packages import get_package_share_directory
+from launch import LaunchDescription
+from launch.actions import IncludeLaunchDescription
+from launch.launch_description_sources import PythonLaunchDescriptionSource
+from launch.substitutions import LaunchConfiguration
+
+
+def generate_launch_description():
+    launch_file_dir = os.path.join(get_package_share_directory('turtlebot3_gazebo'), 'launch')
+    pkg_gazebo_ros = get_package_share_directory('gazebo_ros')
+
+    use_sim_time = LaunchConfiguration('use_sim_time', default='true')
+    x_pose = LaunchConfiguration('x_pose', default='-2.0')
+    y_pose = LaunchConfiguration('y_pose', default='-0.5')
+
+    world = os.path.join(
+        get_package_share_directory('turtlebot3_gazebo'),
+        'worlds',
+        'turtlebot3_world.world'
+    )
+
+    gzserver_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzserver.launch.py')
+        ),
+        launch_arguments={'world': world}.items()
+    )
+
+    gzclient_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(pkg_gazebo_ros, 'launch', 'gzclient.launch.py')
+        )
+    )
+
+    robot_state_publisher_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'robot_state_publisher.launch.py')
+        ),
+        launch_arguments={'use_sim_time': use_sim_time}.items()
+    )
+
+    spawn_turtlebot_cmd = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, 'spawn_turtlebot3.launch.py')
+        ),
+        launch_arguments={
+            'x_pose': x_pose,
+            'y_pose': y_pose
+        }.items()
+    )
+
+    ld = LaunchDescription()
+
+    # Add the commands to the launch description
+    ld.add_action(gzserver_cmd)
+    ld.add_action(gzclient_cmd)
+    ld.add_action(robot_state_publisher_cmd)
+    ld.add_action(spawn_turtlebot_cmd)
+
+    return ld