[OPEN-SOURCE] Machinery Modelling Toolkit

[Kalybio]

@;593337

That’s sure possible. New track friction component doesn’t require a suspension anymore and can use collision information. Which means that tracks as on heavy construction machinery (with little to no suspension) can be simulated.
The arm can be done with physics constraints, but it will take quite some time to tweak every joint and mass of part to make it look stable. Better results could be achieved with PhysX Articulations: Articulations — NVIDIA PhysX SDK 3.4.0 Documentation
but its not exposed in UE4. Potentially, it can be added with c++ code.

@;593338

I’ve seen your other post where you already tried using physics constraints. Using target orientation or position of the constraint is the way to go when it comes to controls. The jittering and parts getting disconnected is something normal for PhysX. You could minimize it by setting more position and velocity iterations on parts in properties, enabling projection on physics constraints and tweaking mass of the parts - there shouldn’t be more that 1 to 10 mass difference between constrained parts. Most likely you will still have problems when trying to lean on arm against the ground. More stable solution would be to use Articulations as I’ve mentioned in previous post.

There is something else you can try too. I’ve exposed function to BP which allows to set Inertia tensor of the simulated body. It can help with stability if you set a much smaller inertia on axis that should be mobile and very high inertia on axis that should be locked. There is an example of using this function on propeller, in Simple Examples map.

Thank you for both of your responses!
“Unfortunately”, the development of the backhoe simulator that you saw on my post in other topic (and the cause of me coming here asking these questions for you) is almost at the end. It would not be very good to go messing around with this right now, but there are another simulators coming in the near future and i’m sure these informations that you told me will be useful.

I’m not skillful on the UE4 yet, i’ve been developing in it for 6 months only (and not constantly), but I will surely be looking in what you said. Thank you again.