refactor: reorganize multi-camera examples

orbbec_camera/examples/multi_net_camera/multi_net_camera.launch.py

@@ -0,0 +1,47 @@
+from launch import LaunchDescription
+from launch.actions import IncludeLaunchDescription, GroupAction, TimerAction
+from launch.launch_description_sources import PythonLaunchDescriptionSource
+from launch_ros.actions import Node
+from ament_index_python.packages import get_package_share_directory
+import os
+
+
+def generate_launch_description():
+    # Include launch files
+    package_dir = get_package_share_directory("orbbec_camera")
+    launch_file_dir = os.path.join(package_dir, "launch")
+    launch1_include = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, "femto_mega.launch.py")  # If you are using Gemini 335Le, replace femto_mega.launch.py ​​with gemini_330_series.launch.py
+        ),
+        launch_arguments={
+            "camera_name": "camera_01",
+            "net_device_ip": "192.168.1.10",
+            "net_device_port": "8090",
+            "sync_mode": "standalone",
+        }.items(),
+    )
+
+    launch2_include = IncludeLaunchDescription(
+        PythonLaunchDescriptionSource(
+            os.path.join(launch_file_dir, "femto_mega.launch.py")  # If you are using Gemini 335Le, replace femto_mega.launch.py ​​with gemini_330_series.launch.py
+        ),
+        launch_arguments={
+            "camera_name": "camera_02",
+            "net_device_ip": "192.168.1.11",
+            "net_device_port": "8090",
+            "sync_mode": "standalone",
+        }.items(),
+    )
+
+    # If you need more cameras, just add more launch_include here, and change the usb_port and device_num
+
+    # Launch description
+    ld = LaunchDescription(
+        [
+            TimerAction(period=0.0, actions=[GroupAction([launch1_include])]),
+            TimerAction(period=2.0, actions=[GroupAction([launch2_include])]),
+        ]
+    )
+
+    return ld