How to properly modify character's position?

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#1

Hello, I want to keep character’s position always on the same Y-Axis, so it only moves on Z-Axis and X-Axis.

Currently I do:

while Character.Parent ~= nil do
    local RootCFame = Root.CFrame
    local Position = RootCFame.Position
    local Angles = RootCFame - Position
    local YPosition = 5

    Root.CFrame = CFrame.new(Vector3.new(Position.X, YPosition, Position.Z)) * Angles

    RunService.Heartbeat:Wait()
end

But the problem is that this causes my character to heavily jitter, while moving or standing still, sometimes it just gets flung if you walk in to a wall, etc.

My question is, how do I properly set root part’s CFrame to avoid any jittering while keeping the character always on the same axis?

(I’m doing all of this on client)

#2

Hello there!
You could just do that:

while Character.Parent ~= nil do
    local RootCFame = Root.CFrame
    local Position = RootCFame.Position
    local Angles = RootCFame - Position
    local YPosition = 5

    Root.CFrame = CFrame.new(Vector3.new(Position.X, Position.Y, Position.Z)) * Angles

    RunService.Heartbeat:Wait()
end

(I’m really sorry but my english level isn’t high enough to explain what I modified, but I modified the 7th line.)

#3

But this doesn’t do anything, please re-read the post, I need to set the specific Y position.

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#4

Did you tried tweenservice? And if you ever tried it what was the result

#5

TweenService interpolates a property from 1 point to another each frame. It will not be helpful in this case

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#6

I don’t know what are you trying to achieve. But i can recommend you the “linear velocity”. If you get position to loop it will be jittered. But linear velocity won’t be jittered.

#7

Well as you know, character is affected by the physics, tweening is ideal for anchored models. I want to keep the character on the same Y-Axis while all of the physics are applied to it, just a normal character, but the Y-Axis for position stays the same.

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#8

I would do linear velocity and lock onto the Y-Axis and adjust to what I want, then change the HumanoidState to none or whatever to get the physics (not free fall or flying). I don’t know if this works but if it doesn’t, you must re-adjust the physics of the character(animation etc.) while linear velocity is lock onto the Y-Axis

Another way is to create a Part under the player and adjust the Y-Axis as you want, and make the Part follow player in the X-Axis and Z-Axis. You can keep the physics with this.

Sorry, if i can’t help you. This is max that i know.

Here is example script that i made:

local Runservice = game:GetService("RunService")
--Runservice

local Player = game:GetService("Players").LocalPlayer
Player.CharacterAdded:Wait()
local Character = Player.Character
local Root = Character:WaitForChild("HumanoidRootPart")
--Player,Character etc.

local Part = Instance.new("Part")
Part.Parent = game.Workspace
Part.Anchored = true
Part.Size = Vector3.new(19, 1, 22)
Part.Transparency = 1
--Part adjustments

Runservice.Heartbeat:Connect(function()
	if Root.Position.Y >= 8.498 then
		Part.Position = Vector3.new(Root.Position.X,5,Root.Position.Z)
		print(Root.Position)
	else
		print("Cannot")
	end
end)

You need to put in StarterPlayer. If you want this be in server i can make (actually thats what you need).

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#9

Yeah this is close to what I want, however I need to do this with a humanoid root part, not with an additional part, i will let you know regarding the humanoid state

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