3.2.2 to 3.2.3 VehicleBody behaviour

defomort

I recently moved a project from 3.2.2 to 3.2.3 and haven't been able to get my vehicles to behave consistently.

Engine force applied to the wheels is the same but the vehicle accelerates at a much slower rate and is incapable of attaining the same top speed. Multiplying the engine_force by x2 or x4 helps but feels weird in-game. I thought this was tied to recent changes to physics dampening but setting dampening to 0 or -1 on the vehicle didn't help.

There is a github thread for this already but as this is from moving from 3.1 to 3.2 I haven't been able to use their solution for my project.

This is the line being called every physics frame to move the vehicle: engine_force = throttle_val * MAX_ENGINE_FORCE * gear_ratio * diff It is producing the same engine_force in 3.1 and 3.2.

Has anyone figured out how to consistently mimic 3.2.2 VehicleBody engine_force in 3.2.3?

woopdeedoo

I don't know exactly how to help you, but I presume this may be related to your problem. From 3.2.3 changelog:

Physics: Better damping implementation for Bullet rigid bodies (GH-39084). Note: This makes the behavior of the GodotPhysics and Bullet backends consistent, and more user-friendly with Bullet. If you're using damping with the Bullet backend, you may need to adjust some properties to restore the behavior from 3.2.2 or earlier (see GH-42051).