[OPEN-SOURCE] Machinery Modelling Toolkit

[Xazas]

@;576381

Is your secondary suspension arm is a skeletal mesh? As they do lag behind unless you move them in local space only. Otherwise not sure what is wrong. Can you show how you do calculation for animation?

At first I had it set up by doing a LookAt rotation towards a socket on the lower arm, rotating it in world space. However your answer gave me the idea to do it with trignometrics and a local rotation as seen here:

Unfortunatly the result is the same lag as in the gif I already posted. The upper arm is a static mesh, but in what way does it matter if it is a skeletal mesh and wether the rotation happens in word space or local space?

@;576381

In theory yes. But keep in mind that currently implemented Differential is a Locked Differential and for cars you need a bit more advanced version of it - Limited Slip Differential, which allows for differential to be open when there is no torque coming into the system and gets locked as you push pedal: https://www.youtube.com/watch?v=ujsxq9WBllU
Locked differential might work in principal for off-road vehicle, but you might have issue with turning it as wheels will be slipping not able to rotate with different velocities. For the tank it’s not a problem as there are clutches between track and differential.

Having said that, be aware that WheelAxle component was something that I’ve added very early in the development of the ModularDriveTrain and never used since, I don’t think it will work correctly. Instead, you could use TrackProcessorModular as a “wheel processor”, just make sure to set weight of the tread to something very small, like 1kg or less. Pretend that you are driving on sprockets
Otherwise, you are correct. Information passes from engine down to differentials and track/wheel processor, here we calculate how track/wheel should rotate because of the engine torque and provide information about “desired” wheel velocity to friction component. Friction component tells back how much “reaction” force we should apply to the track/wheel (handled by track/wheel processor) because of friction and then data flows back to the engine.

I’m not quite the expert in mechanical engineering but I’ll do some research in how differentials actually work and how it could be implemented, thanks for the heads up. As for driving with the sprocket, thats a great idea and makes things a bit simpler for me.