How to change the world and scene

[lehoangan2906]

Hi Stephen, thank you so much for you and your team for the hardwork to get this project to run on ROS 2.

Currently I'm tweaking your project and face the following issues:

• When I change the scene name inside gazebo_tb3_house_demo_launch.py file from tb3_house_demo_crowd to other world and scene names defined in your project, the pedestrians and world are spawned, but the pedestrians are not moving anymore.
• When I create my own world and scene file and change the scene name inside the launch file to point into them, the above issue still persist.

I don't know in which files or sections should I modify other than the scene variable in the gazebo_tb3_house_demo_launch.py file to make the pedestrians move. Can you help me with that?