Blade Ball Script | AUTO PARRY – 23RD SEPTEMBER

local Debug = false -- Set this to true if you want my debug output.
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Players = game:GetService("Players")

local Player = Players.LocalPlayer or Players.PlayerAdded:Wait()
local Remotes = ReplicatedStorage:WaitForChild("Remotes", 9e9) -- A second argument in waitforchild what could it mean?
local Balls = workspace:WaitForChild("Balls", 9e9)

-- Functions

local function print(...) -- Debug print.
    if Debug then
        warn(...)
    end
end

local function VerifyBall(Ball) -- Returns nil if the ball isn't a valid projectile; true if it's the right ball.
    if typeof(Ball) == "Instance" and Ball:IsA("BasePart") and Ball:IsDescendantOf(Balls) and Ball:GetAttribute("realBall") == true then
        return true
    end
end

local function IsTarget() -- Returns true if we are the current target.
    return (Player.Character and Player.Character:FindFirstChild("Highlight"))
end

local function Parry() -- Parries.
    Remotes:WaitForChild("ParryButtonPress"):Fire()
end

-- The actual code

Balls.ChildAdded:Connect(function(Ball)
    if not VerifyBall(Ball) then
        return
    end
    
    print(`Ball Spawned: {Ball}`)
    
    local OldPosition = Ball.Position
    local OldTick = tick()
    
    Ball:GetPropertyChangedSignal("Position"):Connect(function()
        if IsTarget() then -- No need to do the math if we're not being attacked.
            local Distance = (Ball.Position - workspace.CurrentCamera.Focus.Position).Magnitude
            local Velocity = (OldPosition - Ball.Position).Magnitude -- Fix for .Velocity not working. Yes I got the lowest possible grade in accuplacer math.
            
            print(`Distance: {Distance}\nVelocity: {Velocity}\nTime: {Distance / Velocity}`)
        
            if (Distance / Velocity) <= 10 then -- Sorry for the magic number. This just works. No, you don't get a slider for this because it's 2am.
                Parry()
            end
        end
        
        if (tick() - OldTick >= 1/60) then -- Don't want it to update too quickly because my velocity implementation is aids. Yes, I tried Ball.Velocity. No, it didn't work.
            OldTick = tick()
            OldPosition = Ball.Position
        end
    end)
end)