Why doesn't this make me go forwards?

Help and Feedback Scripting Support
1

No matter how I rotate the velocity just won’t go in that direction. What’s wrong?

		SwimForce.VectorVelocity = Root.CFrame.LookVector * SwimSpeed
2

This makes me question why they deprecated BodyVelocity / BodyPosition since that was easier to work with. Why doesn’t this work?

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3 
local function SetLinearVelocity(Part, MaxForce, Velocity)
	local LinearVelocity = Part:FindFirstChildOfClass("LinearVelocity")
	if not LinearVelocity then
		LinearVelocity = Instance.new("LinearVelocity")
		LinearVelocity.Parent = Part
	end
	if not LinearVelocity.Attachment0 then
		local Attachment = Instance.new("Attachment")
		Attachment.Parent = Part
		LinearVelocity.Attachment0 = Attachment
	end
	LinearVelocity.MaxForce = MaxForce
	LinearVelocity.VectorVelocity = Velocity
end


for i = 1, 100 do
	wait(.1)
	SetLinearVelocity(script.Parent, 10000, Vector3.new(0, i*5, 0))
end
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4

I think I understand that part, but like if I change it to this Vector3.new(0,0,i*5) you’d think that the velocity would move in wherever my characters facing but it’s not doing that.

5

Actually nvm it works but for some reason it wants to go backwards lol?? Roblox made some weird new bodymovers… I could just make it negative though and maybe it’ll go straight.

6

It’s also kind of buggy and sometimes i glide to the left before the whole acceleration starts up… I don’t really understand this bodymover very much tbh

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7

try this in an empty baseplate as a localscript under startercharacterscripts

it should go straight

local HumanoidRootPart = script.Parent:WaitForChild("HumanoidRootPart")
local function SetLinearVelocity(Part, MaxForce, Velocity)
	local LinearVelocity = Part:FindFirstChildOfClass("LinearVelocity")
	if not LinearVelocity then
		LinearVelocity = Instance.new("LinearVelocity")
		LinearVelocity.Parent = Part
	end
	if not LinearVelocity.Attachment0 then
		local Attachment = Instance.new("Attachment")
		Attachment.Parent = Part
		LinearVelocity.Attachment0 = Attachment
	end
	LinearVelocity.MaxForce = MaxForce
	LinearVelocity.VectorVelocity = Velocity
end


while true do
	for i = 1, 10 do
		wait(.1)
		SetLinearVelocity(HumanoidRootPart, 100000, (HumanoidRootPart.CFrame.LookVector*10*i) * Vector3.new(1, 0, 1))
	end
	SetLinearVelocity(HumanoidRootPart, 100000, Vector3.new())
	wait(2)
end
8

Mover Constraints | Roblox Creator Documentation

9

https://gyazo.com/2bc745c72668343d3686eb07f6e0d0ba

I don’t understand… Why is it so difficult just to make the character move in the direction theyre facing

local SwimForce = Instance.new("LinearVelocity")
local SwimAttachment = Instance.new("Attachment")
local wPressed = false
local RunService = game:GetService("RunService")
local SwimSpeed = 0
local MaxSwimSpeed = 20
local Player = game.Players.LocalPlayer

local Root = script.Parent:WaitForChild("HumanoidRootPart")
local Hum = script.Parent:WaitForChild("Humanoid")
Hum.WalkSpeed = 0

SwimAttachment.Orientation = Root.Orientation

SwimAttachment.Parent = Root
SwimForce.Attachment0 = SwimAttachment
SwimForce.RelativeTo = Enum.ActuatorRelativeTo.Attachment0
SwimForce.Parent = Root
SwimForce.Enabled = false
SwimForce.MaxForce = 10000

local TS = game:GetService("TweenService")
local SwimForceInfo = TweenInfo.new(1, Enum.EasingStyle.Quad, Enum.EasingDirection.InOut, 0, false, 0)

local UIS = game:GetService("UserInputService")
UIS.InputBegan:Connect(function(input, processed)
	if not processed then
		if input.KeyCode == Enum.KeyCode.W then
			wPressed = true
		end
	end
end)
UIS.InputEnded:Connect(function(input)
	if input.KeyCode == Enum.KeyCode.W then
		wPressed = false
	end
end)
RunService.Stepped:Connect(function()
	if wPressed then
		SwimForce.Enabled = true
		local Direction = (Root.CFrame.LookVector*10*SwimSpeed)*Vector3.new(1,0,1)
		--local Track = TS:Create(SwimForce, SwimForceInfo, {VectorVelocity = Direction}):Play()
		SwimForce.VectorVelocity = Direction
		if SwimSpeed < MaxSwimSpeed then
			SwimSpeed += 1
		end
	else
		SwimForce.VectorVelocity = Vector3.new()
	end
end)
10

Shouldn’t this be relative to world since part CFrame look vector is a world space vector?

11

The example works fine, implement it and and find out whats different in yours

12

Same thing happening to me rn. Fr questioning why they deprecated Body Velocity. It was so easy to work with

No matter what I do, my character wont go forward. It just keeps turning to every direction BUT forward

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