Help fixing an oversight in "velocity" calculations (custom spear recreation) (1.21.8+)

Currently there's an oversight in the calculations where if you pearl for example that displacement is shown in the calculations and ends up scaling the damage when I'd prefer parking didn't effect the value at all. Also there's a issue with the smoothing where sometimes you can one shot somebody because it's using an old value yet to be overridden or at least I think that's the cause.