Sittable bouncing ball

[grim condor]

how can i make ball like this on Roblox???

[hardy trench]

looks like just a a mesh that gets squized (change Y size) and perhaps a tiny bit of upwards force

[grim condor]

hm let me try

[grim condor]

um it's like this

[hardy trench]

Are you actually change the mesh's size or de model's size?

[grim condor]

i did it like this: `local TweenService = game:GetService("TweenService")
local ball = script.Parent
local seat = ball:FindFirstChildWhichIsA("Seat")

local originalSize = Vector3.new(4, 4, 4)
local squishSize = Vector3.new(4.4, 3.4, 4.4)

local bounceTween = nil

-- Tween info
local tweenInfo = TweenInfo.new(
0.3,
Enum.EasingStyle.Sine,
Enum.EasingDirection.InOut,
-1, -- loop forever
true -- reverse
)

-- Create the tween function
local function startBounce()
local goal = { Size = squishSize }
bounceTween = TweenService:Create(ball, tweenInfo, goal)
bounceTween:Play()
end

local function stopBounce()
if bounceTween then
bounceTween:Cancel()
ball.Size = originalSize
end
end

-- Detect when player sits
seat:GetPropertyChangedSignal("Occupant"):Connect(function()
if seat.Occupant then
startBounce()
else
stopBounce()
end
end)
`

[hardy trench]

is the ball a model or a mesh?

[grim condor]

uhm its part

ball shaped

[hardy trench]

I've never tried to work on something like this with parts to be frank

let me quickly run a very quick test

Nope, I would just use a mesh

Wanted to check if roblox had some property for it. But for some reason their balls suck

in case you don't have blender:

Just an isosphere and some subd. Should be smooth enough

In case it isn't, then I can send you a smoother one (the smoother it is, the laggier it is, of course)

[grim condor]

idc about lag but 1 sec let me understand things rn

[hardy trench]

Roblox handles "balls" weirdly. So it always looks at the "largest shape inside the box", without causing deformation

While a mesh, there it just allows you to deform it as you wish

[grim condor]

model u sent me, is it mesh?

[hardy trench]

Yes, .objs are almost always meshes

Example of what I meant: With a mesh I can do this

[grim condor]

it looks so good

[hardy trench]

With a ball, it would just try to fit the same "truck", just scaled down to be the largest it can be inside that shape

[grim condor]

do i have to anchor mesh

ig yes

[grim condor]

uhm like i can't make that bounce

it looked so easy at first 😭

[hardy trench]

Depends, if you move it up a tad with some force then it should be fine

But you could just anchor it

Do remember that it then will be floating

so move it down half the size change in the y position

(at the same speed as the size change)

[grim condor]

i mean it still doesn't bounc

do u want script?

[hardy trench]

Have you added the force that I told you to add?

[grim condor]

Oh- I didn’t

[grim condor]

i just dont understand like i even asked ChatGPT, but it still doesn't work.

[trail rover]

Use a mesh and bone to animate it squishing

[grim condor]

in Blender?

[trail rover]

idk, ask chatgpt