Problem with Unreal Physics

[cez0000]

Hi guys, I have a problem with the unreal-physics option for robot movement. I created a basic script that loads the drone into the scene. I’ve successfully connected it with PX4 and QGroundControl, and the UAV responds to my controller or PX4 commands — but only with the fast-physics option.

My goal is to attach a payload to it in order to simulate cargo drone physics in UE. Maybe I’m missing some configuration steps. What I did so far is change the physics setting from fast-physics to unreal-physics in the default robot file, and also in the schema, where I added it to the list of available physics types (which was strange, since it was missing there).

[jonyMarino]

Hi @cez0000, unreal physics was deprecated in PA. First we need to work on clock syncronization with UE. You can try with this branch for payload simulation.

[cez0000]

Ok, thanks for the reply. I’ll play around with Unreal Physics too and let you know if I come up with something :)

[robin271828]

[jonyMarino]

@robin271828 The GazeboDrone was originally developed by me as a bridge for AirSim v1, where it mimicked the behavior of a Gazebo drone inside the Unreal Engine environment. Its purpose was to synchronize simulation states between Gazebo and AirSim, effectively acting as a visualization layer over Gazebo's dynamics.

In contrast, ProjectAirSim/AirSim uses its own internal physics simulation, meaning it does not depend on Gazebo or the Chaos physics engine for the drones. The idea with UnrealPhysics was enabling Chaos for drone physics simulation.

[robin271828]

Great, how would does performance compare across these physic engines?

[jonyMarino]

I don't know because I wasn't behind that at Microsoft.