How the launch file is processed

asked 2023-01-11 21:44:50 -0500

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Hello, I have a question to ask: how is the .launch file processed (the underlying mechanism)

for example,when turtlebot3 runs the roslaunch * *. launch command when running a function package,

another question:where are the parameters in the launch file used (in which code? ROS Master? In turtlebot3’s firmware? )

thank you

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