Limit speed of BodyPosition

Help and Feedback Scripting Support
#1

So I am using BodyPosition to move parts around the workspace, but they go really fast in the middle of the movement. I need to limit the speed, and I’ve tried using MaxForce and such… I can’t get it to work…
(Sorry if wrong category)

#2

It’s a bit odd that a BodyPosition is accelerating. Have you tried lowering P (the power) and increasing the D (damper)?

Are you using a script to manipulate the BodyPosition? Also, this would belong in #help-and-feedback:scripting-support

1 Like
#3

I had assumed it wouldn’t go there since its not actually scripting related…
I’ll try changing the P and D values but I need it to not be too (can’t think of the word) tween-y… What I mean is accelerating at the start and decelerating at the end too long… I want it to accelerate for about 0.1 seconds, hit max speed, and at the end decelerate for 0.1 seconds.

No I am not using a script to manipulate it (other than set position once)

#4

Personally, I (almost) always put the MaxForce to math.huge and control the speed using P and D. I found I have a lot more control over it like that.

I don’t have much information on your case but it looks like decreasing D would work.

#5

I need it to not overshoot at all… What I want is it to stay at a constant speed, where tweens would be too inefficient (I believe) as there will be a lot of objects

#6

In that case you should look at repeatedly setting the BodyPosition.Position a little more in the direction you’d like, until you reach your desired position.

#7

I can’t exactly do that due to the way the script is set up. it’s very critically time based. I’ll try change it
EDIT: Nope… not possible and wont be because the parts are following the player. They stop when they have reached the player, they can’t have the position tweened to the player

#8

I’m not sure if it’s possible in any other way, if it’s time based I’d advise tweening the CFrame or Position property of the part you’re trying to move.

#9

I couldn’t do that either because it’s using magnitude to determine when to stop, and I’m having 300+ 2 part models moving at a time which would cause performance issues I believe

EDIT: I can use AlignPosition!

1 Like
#10

You might get better results with a BodyVelocity. You’ll have to manually set the velocity to face towards the target though. It’d also make sense to make it slow down a bit when it gets close to the destination. Here’s an example script showing how it might be done:

local followerBodyVel = --- your body velocity
local targetPosition = --- some Vector3 world-space position

local targetSpeed = 20
local rampDistance = 20 --at 20 studs distance, speed is 100% of targetSpeed. At 1 studs distance, it's 1/rampDistance = 5%

game:GetService("RunService").Stepped:Connect(function( dt )
	local difference = (targetPosition - followerBodyVel.Parent.Position)
	local distance = difference.Magnitude
	local direction = difference.Unit

	local rampAmount = math.min(1, distance/rampDistance)

	followerBodyVel.Velocity = direction * targetSpeed * rampAmount
end)

EDIT: Or use an AlignPosition constraint :stuck_out_tongue: