I created a blueprint actor consisting from two boxes linked with a Physics Constraint.
The “upper” box is static, the lower is movable and Gravity is enabled for it.
The goal is for the Physics constraint to behave like a spring with zero friction and zero damping.
No matter what damping and friction I set to zero, when I start the simulation the “lower” box swings as expected, but always goes to a final rest.
How can I have a spring with no damping and no friction, so swings forever?!?
If you are trying to make an obstacle that continuously swings left and right, then it may be better to use a timeline and basically keyframe the swinging of left to right using curves.
Also, this most likely wouldn’t work if it was just physics constraints and gravity as the swinging slowing down isn’t due to friction but due to gravity itself pulling down on the lower box until it comes to a standstill.
Potentially could be also fixed by using the linear motion feature, but unsure if that would help