Vehicles, Portals & Custom Movement

# Vehicle Physics & Seat Awareness

When a player character sits in a VehicleSeat, Roblox transfers network ownership of the vehicle assembly to the client driver. The vehicle may reach speeds of $100\text{ to }300\text{ studs/s}$, which would trigger standard infantry speed checks.

# Automatic Exemption

RAC automatically checks humanoid.Sit and playerState.isSeated. When seated in a VehicleSeat:

• Standard infantry speed limits are replaced with Config.Detectors.Speed.VehicleSpeedMultiplier (default $5.0 \times$).
• Flight and downward ground raycasts are paused.
• When the player exits the seat, normal pedestrian physics monitoring resumes after a $1.0\text{s}$ grace period.

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# Launch Pads & Jump Boosters

For bounce pads or fan blowers that launch characters into the sky:

local RAC = require(game.ServerScriptService.RAC.Core.Engine)

local function OnLaunchPadTouched(launchPad: BasePart, hitPart: BasePart)
    local player = game.Players:GetPlayerFromCharacter(hitPart.Parent)
    if not player then return end

    -- Grant a 3-second exemption for the high arc trajectory
    RAC:AddExemption(player, "LaunchPadArc", 3.0)

    local root = hitPart.Parent:FindFirstChild("HumanoidRootPart") :: BasePart?
    if root then
        root.AssemblyLinearVelocity = Vector3.new(0, 150, 80)
    end
end

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# Wormholes & Spatial Portals

For portals that instantaneously warp players across different zones:

local function UsePortal(player: Player, destinationCFrame: CFrame)
    -- Grant a 1.5-second teleport grace
    RAC:AddExemption(player, "PortalWarp", 1.5)

    local root = player.Character and player.Character:FindFirstChild("HumanoidRootPart")
    if root then
        root.CFrame = destinationCFrame
    end
end

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# Next Steps

• Learn how to extend RAC in Creating Custom Detectors.
• Review Trust Boundaries.