Hello forum. I’m trying to make a rolling ability similar to that in the game Knockout City, but I am running into an issue that I have been unable to debug for about half an hour now.
Issue
As you can see in the video below, my character gets up perfectly fine when I am moving forward and exit the marble, but if I am traveling sideways or backward, the character glitches out and spins really fast.
robloxapp-20240531-2149577.wmv (4.8 MB)
Code:
Server:
ReplicatedStorage.BallForm.OnServerEvent:Connect(function(Player, Argument)
if not Player or not Argument then return end
if Argument == 'Add' then
local Ball = makeBall()
for _, part in Player.Character:GetDescendants() do
if part:IsA('Part', 'Meshpart') then
part.CanCollide = false
print(part.Name)
end
end
Ball.Parent = Player.Character
Ball.CFrame = Player.Character.HumanoidRootPart.CFrame
local Weld = Instance.new('Weld', Ball)
Weld.Part0 = Player.Character.HumanoidRootPart
Weld.Part1 = Ball
local Velocity = Instance.new('BodyAngularVelocity', Ball)
Player.Character.Humanoid.PlatformStand = true
coroutine.wrap(function()
while task.wait() do
pcall(function()
Velocity.AngularVelocity = Vector3.new(Player.Character.Humanoid.MoveDirection.Z * SPEED, 0, Player.Character.Humanoid.MoveDirection.X * -SPEED)
Velocity.MaxTorque = Vector3.new(30000, 0, 30000)
if Player.Character.Humanoid.MoveDirection == Vector3.zero then
Velocity.MaxTorque = Vector3.zero
end
end)
end
end)()
elseif Argument == 'Remove' then
if Player.Character:FindFirstChild('Ball') then
Player.Character.Ball:Destroy()
Player.Character.Humanoid.PlatformStand = false
end
end
end)
Client:
local inBallForm = false
UserInputService.InputBegan:Connect(function(input, processed)
if input.KeyCode == Enum.KeyCode.R and not processed then
if inBallForm then
ReplicatedStorage.BallForm:FireServer('Remove')
cam.CameraSubject = plr.Character.Humanoid
ballFormAnim:Stop()
char:PivotTo(CFrame.lookAlong(char.PrimaryPart.Position, cam.CFrame.LookVector))
inBallForm = false
else
ReplicatedStorage.BallForm:FireServer('Add')
cam.CameraSubject = plr.Character.HumanoidRootPart
ballFormAnim:Play()
inBallForm = true
end
end
end)
RunService.RenderStepped:Connect(function()
if char:FindFirstChild('Torso') then
if inBallForm then
char.Torso.CanCollide = false
end
end
end)
I set the torso to CanCollide = false in the RenderStepped function because roblox automatically sets it to true each frame
(also I know that BodyAngularVelocity is deprecated but I’m too stubborn to use attachments)
The marble is welded to the player’s HumanoidRootPart, the character’s body parts all have CanCollide == False, and the player’s Humanoid has PlatformStand == true. The mouse is locked to the center of the screen, and the camera’s RotationType is set to CameraRelative.
When the marble is disabled, all that happens is the ball is destroyed, and the Humanoid’s PlatformStand property is set to false.
I believe that this occurs because the character has to snap to the camera rotation after exiting the marble with a drastically different orientation, but I am unsure. I have tried setting the character’s CFrame manually after exiting the marble but it has not resolved my issue.
If anybody has any idea of how to fix this issue, a reply would be greatly appreciated. 
