KinematicBody2D with PinJoint to Rigidbody behaving weird when KinematicBody rotates to 180 degree

Hiasae

I have a KinematicBody2D character and some Rigidbody chains. The chains and the character are connected via PinJoints. Now when i move the character the chains follow accordingly. If the characters rotation is about 180 degree, then the chains act weird.

The rotation in the scripts is simply: rotation += delta*ROTATION_SPEED

I have found a workaround, but was wondering if someone can explain me what causes this problem, so i can understand it and avoid related issues.

Saitodepaula

By the time you made this question, you've probably solved it, but I'll leave this as a possible approach for anyone dealing with angles.

I don't know how to explain it in a formal way, with trigonometry and all that, but you can take a look here if want to understand it: https://tauday.com/tau-manifesto

When you are in the inspector, you can see that any rotation "resets" when crossing the 0/180 degrees threshold. When you are rotating something by code and want to avoid weird behaviours due to this angles, you can use the lerp_angle function:

https://docs.godotengine.org/en/stable/classes/class_@gdscript.html#class-gdscript-method-lerp-angle