A world model with a ground plane, 20x20 meter empty room, and 9 dynamic obstacles.
How to Add a Dynamic Obstacle
dynamic_world/world.model
<model name="DynamicObstacle">
-- Position of the new obstacle
<pose>-4 4 0.15 0 0 0</pose>
<include>
<uri>model://dynamic_obstacle</uri>
</include>
</model>