This is an environment using velodyne simulation with 4 pedestrians walking in different style
Using ros melodic and Gazebo 9
cd catkin_ws/src
git clone https://github.com/SDUPiggy/pedestrian_with_collision_gazebo.git
cd ..
catkin_make
sudo cp libActorCollisionsPlugin.so /usr/lib/x86_64-linux-gnu/gazebo-9/plugins/
source ./devel/setup.bash
roslaunch velodyne_description example.launch
https://github.com/osrf/gazebo/tree/gazebo11/examples/plugins/actor_collisions
https://github.com/BruceChanJianLe/gazebo-actor
https://blog.csdn.net/tanjia6999/article/details/102629735