WallrunScript

local c = script.Parent

local holdingKey = false

local uis = game:GetService("UserInputService")

local leftAnim = c.Humanoid:LoadAnimation(script:WaitForChild("WallrunLeft"))
local rightAnim = c.Humanoid:LoadAnimation(script:WaitForChild("WallrunRight"))


uis.InputBegan:Connect(function(inp, p)

    if not p and inp.KeyCode == Enum.KeyCode.F then

        holdingKey = true
    end
end)

uis.InputEnded:Connect(function(inp)

    if inp.KeyCode == Enum.KeyCode.F then

        holdingKey = false
    end
end)


game:GetService("RunService").Heartbeat:Connect(function()

    local raycastParams = RaycastParams.new()
    raycastParams.FilterType = Enum.RaycastFilterType.Blacklist; raycastParams.FilterDescendantsInstances = {c}; raycastParams.IgnoreWater = true

    local rayL = workspace:Raycast(c.HumanoidRootPart.CFrame.Position, -c.HumanoidRootPart.CFrame.RightVector * 3, raycastParams)
    local rayR = workspace:Raycast(c.HumanoidRootPart.CFrame.Position, c.HumanoidRootPart.CFrame.RightVector * 3, raycastParams)

    local ray = rayL or rayR

    if ray and holdingKey then

        if ray == rayL then
            if not leftAnim.IsPlaying then leftAnim:Play() end
            rightAnim:Stop()

        else
            if not rightAnim.IsPlaying then rightAnim:Play() end
            leftAnim:Stop()
        end

        local part = ray.Instance

        local weld = c.HumanoidRootPart:FindFirstChild("WallrunWeld") or Instance.new("WeldConstraint")
        weld.Name = "WallrunWeld"

        weld.Part0 = c.HumanoidRootPart
        weld.Part1 = part

        local bp = c.HumanoidRootPart:FindFirstChild("WallrunBodyPosition") or Instance.new("BodyPosition", c.HumanoidRootPart)
        bp.Name = "WallrunBodyPosition"
        bp.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
        bp.Position = c.HumanoidRootPart.Position + c.HumanoidRootPart.CFrame.LookVector * 10

    else

        for i, child in pairs(c.HumanoidRootPart:GetChildren()) do

            if child.Name == "WallrunWeld" or child.Name == "WallrunBodyPosition" then

                child:Destroy()
            end
        end

        leftAnim:Stop()
        rightAnim:Stop()
    end
end)