How Does roblox character movement work again?

[santafatso28 (TheOlive)]

You can write your topic however you want, but you need to answer these questions:

1. What do you want to achieve? Keep it simple and clear!
   I want to make this vehicle thing move around like the character.

2. What is the issue? Include screenshots / videos if possible!
   The issue is that I don’t know how roblox moves the character based on the camera angle. Whenever you are moving forward the y axis rotation of the camera influences what the player moving forward is. How do I use the default roblox code for my system?

[Scottifly]

I believe the sample off road vehicle checkpoint race uses Humanoids in their vehicles. I could be wrong, but I looked at the scripting there and it was way beyond what I could understand.

[anirudh851 (Ani)]

You could probably add a humanoid to the car model and then set player.Character to the car, this will make the car act exactly like the player character, while placing the player model in serverstorage for replacing back if needed afterwards. However, if you are making a driveable car then I’d recommend you to use physics constraints and vehicle seats rather than making it a character.

[santafatso28 (TheOlive)]

Thanks to both of you for the tip in using humaniods, I think thats the way to go.

I will get the humanoid.MoveDirection of the player and use that for the goals on my physics constraints rather than creating a new one.

[dthecoolest]

Alternatively you can use UserInputService and camera CFrame to get move direction the same as humanoid.MoveDirection without needing a humanoid.

@ThanksRoBama

local RunS = game:GetService("RunService")
local InputS = game:GetService("UserInputService")

local player = game.Players.LocalPlayer
local camera = game.Workspace.CurrentCamera
local character = player.Character or player.CharacterAdded:Wait()

player.CharacterAdded:Connect(function(_character)
	character = _character
end)

local walkKeyBinds = {
	Forward = { Key = Enum.KeyCode.W, Direction = Enum.NormalId.Front },
	Backward = { Key = Enum.KeyCode.S, Direction = Enum.NormalId.Back },
	Left = { Key = Enum.KeyCode.A, Direction = Enum.NormalId.Left },
	Right = { Key = Enum.KeyCode.D, Direction = Enum.NormalId.Right }
}

local function getWalkDirectionCameraSpace()
	local walkDir = Vector3.new()

	for keyBindName, keyBind in pairs(walkKeyBinds) do
		if InputS:IsKeyDown(keyBind.Key) then
			walkDir += Vector3.FromNormalId( keyBind.Direction )
		end
	end

	if walkDir.Magnitude > 0 then --(0, 0, 0).Unit = NaN, do not want
		walkDir = walkDir.Unit --Normalize, because we (probably) changed an Axis so it's no longer a unit vector
	end
	
	return walkDir
end

local function getWalkDirectionWorldSpace()
	local walkDir = camera.CFrame:VectorToWorldSpace( getWalkDirectionCameraSpace() )
	walkDir *= Vector3.new(1, 0, 1) --Set Y axis to 0

	if walkDir.Magnitude > 0 then --(0, 0, 0).Unit = NaN, do not want
		walkDir = walkDir.Unit --Normalize, because we (probably) changed an Axis so it's no longer a unit vector
	end

	return walkDir
end

local function updateMovement( dt )
	local humanoid = character:FindFirstChild("Humanoid")
	if humanoid then
		humanoid:Move( getWalkDirectionWorldSpace() )
	end
end	

RunS.RenderStepped:Connect(updateMovement)

[santafatso28 (TheOlive)]

Will try this tomorrow thanks for the help.
I think this is the 3rd thing you’ve helped me with lmao.

[santafatso28 (TheOlive)]

Definitely seems like the solution, I assume I would just hook up movevector to my physics constraints?

EDIT:
This worked, very very well.