How to make rim physics for basketball game?

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1

So im making a basketball game and i wanna add physics to my rim. For example like a little wobble effect when dunking or when the ball bounces off the rim.

Ive tried using hinge constrains and a TorsionSpringConstraint, but cant get it working

Id also like for it to move it all directions

heres a example from Practical Basketball

I want it exactly or as close to as this

i made a Module for this and i feel like im close but it dosnt look good.

local RimBend = {}
RimBend.__index = RimBend

local RunService = game:GetService(“RunService”)
local TweenService = game:GetService(“TweenService”)

local RADIUS = 3
local BEND_POWER = 0.25
local MAX_ANGLE = math.rad(40)
local IMPACT_THRESHOLD = 0

local BEND_TIME = 0.4
local RETURN_TIME = 0.2

function RimBend.new(rimPart)
local self = setmetatable({}, RimBend)
self.Rim = rimPart
self.OriginalCFrame = rimPart.CFrame

self.IsBent = false
self.InContact = false
self.Cooldown = false

return self

end

function RimBend:ApplyBend(dir, vel)
self.IsBent = true

local angle = math.clamp(vel * BEND_POWER, 0, MAX_ANGLE)
local axis = dir:Cross(Vector3.new(0,1,0))

local bentCFrame = self.OriginalCFrame * CFrame.fromAxisAngle(axis, angle)

local bendTween = TweenService:Create(
	self.Rim,
	TweenInfo.new(BEND_TIME, Enum.EasingStyle.Quad),
	{CFrame = bentCFrame}
)
bendTween:Play()

bendTween.Completed:Once(function()
	local returnTween = TweenService:Create(
		self.Rim,
		TweenInfo.new(RETURN_TIME, Enum.EasingStyle.Back),
		{CFrame = self.OriginalCFrame}
	)
	returnTween:Play()

	returnTween.Completed:Once(function()
		self.IsBent = false
	end)
end)

end

function RimBend:Start(parts)
RunService.Heartbeat:Connect(function()
local touchingSomething = false

	for _, part in ipairs(parts) do
		if part and part:IsA("BasePart") then
			local dist = (part.Position - self.Rim.Position).Magnitude
			if dist <= RADIUS then
				touchingSomething = true

				if not self.IsBent then
					local vel = part.AssemblyLinearVelocity.Magnitude
					if vel >= IMPACT_THRESHOLD then
						local dir = (part.Position - self.Rim.Position).Unit
						self:ApplyBend(dir, vel)
					end
				end
			end
		end
	end

	if self.InContact and not touchingSomething then
		self.IsBent = false
	end

	self.InContact = touchingSomething
end)

end

return RimBend
. This is what it looks like.

2 Likes
2

I would add a part that acts as a hinge. So you apply the animations and whatnot to that then weld the rim mesh to the hinge.

2 Likes