# RunService（ロブロックス クラス）

> ゲームの1フレームごとに処理を実行するためのサービスです。パーツを回し続けるなど、なめらかに動かし続けたいときに使います。

- URL：https://roblox.minecraft-okinawa.com/reference/classes/RunService/
- 公式：https://create.roblox.com/docs/reference/engine/classes/RunService
- 受け継いでいるクラス：Instance

## 使用例：回り続けるパーツ

（Script／置く場所：パーツの中）

```lua
local RunService = game:GetService("RunService")
local part = script.Parent :: BasePart
part.Anchored = true

RunService.Heartbeat:Connect(function(deltaTime)
	part.CFrame = part.CFrame * CFrame.Angles(0, math.rad(90) * deltaTime, 0)
end)
```

## プロパティ

- `RunService.RunState: RunState`：The current run state of the game's simulation.

## メソッド

- `RunService:BindToAnimation(function: Function, frequency: StepFrequency, priority: int): RBXScriptConnection`：Binds a custom function to be called at a fixed frequency before Animators update when fixed simulation is enabled, or immediately before BindToSimulation callbacks otherwise.
- `RunService:BindToAnimationParallel(function: Function, frequency: StepFrequency, priority: int): RBXScriptConnection`：Binds an Actor-scoped function to run in parallel at a fixed frequency after serial Class.RunService:BindToAnimation()|BindToAnimation() callbacks.
- `RunService:BindToRenderStep(name: string, priority: int, function: Function): ()`：Given a string name of a function and a priority, this method binds the function to RunService.PreRender.
- `RunService:BindToSimulation(function: Function, frequency: StepFrequency, priority: int): RBXScriptConnection`：Binds a custom function to be called at a fixed frequency which is independent of the frame rate.
- `RunService:BindToSimulationParallel(function: Function, frequency: StepFrequency, priority: int): RBXScriptConnection`：Binds an Actor-scoped function to run in parallel at a fixed frequency after serial Class.RunService:BindToSimulation()|BindToSimulation() callbacks.
- `RunService:GetPredictionStatus(context: Instance): PredictionStatus`：Checks the PredictionStatus of a specific context instance, useful for debugging scripts affecting multiple instances where some might be predicted and others might not.
- `RunService:IsClient(): boolean`：クライアントで実行されているかを調べます。
- `RunService:IsEdit(): boolean`：Returns whether the current environment is in Edit mode.
- `RunService:IsResimulating(): boolean`：Returns whether the client is currently in a resimulation step after a misprediction in the server authority model.
- `RunService:IsRunMode(): boolean`：Returns whether a **Run** playtest has been initiated in Studio.
- `RunService:IsRunning(): boolean`：Returns whether the experience is currently running.
- `RunService:IsServer(): boolean`：サーバーで実行されているかを調べます。
- `RunService:IsStudio(): boolean`：Returns whether the current environment is running in Studio.
- `RunService:Pause(): ()`：Pauses the experience's simulation if it is running, suspending physics and scripts.
- `RunService:Run(): ()`：Runs the game's simulation, running physics and scripts.
- `RunService:SetPredictionMode(context: Instance, mode: PredictionMode): ()`：Sets the prediction mode for an Instance to an PredictionMode value.
- `RunService:Stop(): ()`：Stops the experience's simulation if it is running.
- `RunService:UnbindFromRenderStep(name: string): ()`：Unbinds a function that was bound to the render loop using Class.RunService:BindToRenderStep().

## イベント

- `RunService.Heartbeat(deltaTime: double)`：毎フレーム、物理の計算のあとに発生するイベントです。前のフレームからの経過時間（秒）が渡されます。
- `RunService.Misprediction(time: double, instances: Array, stats: Dictionary)`：In the server authority model, fires during prediction when the engine detects that the client has diverged from the server's authoritative state. Intended for plugin-based debugging.
- `RunService.PostSimulation(deltaTimeSim: double)`：Fires every frame, after the physics simulation has completed.
- `RunService.PreAnimation(deltaTimeSim: double)`：Fires every frame, prior to the physics simulation but after rendering.
- `RunService.PreRender(deltaTimeRender: double)`：Fires every frame, prior to the frame being rendered.
- `RunService.PreSimulation(deltaTimeSim: double)`：Fires every frame, prior to the physics simulation.
- `RunService.RenderStepped(deltaTime: double)`：毎フレーム、画面を描く前に発生するイベントです（LocalScript専用）。
- `RunService.Rollback(time: double)`：In the server authority model, this fires after rolling back the predicted state due to a misprediction, but before resimulation begins.
- `RunService.Stepped(time: double, deltaTime: double)`：Fires every frame, prior to the physics simulation.

英語の説明とメンバー一覧：Roblox Creator Documentation（CC BY 4.0）。日本語の解説はこのサイト独自のものです。

執筆：鈴木孝昌（現役プロジェクトマネージャー／プログラミング講師）／運営：沖縄マイクラ部 プログラミングスクール「クロスウェーブ」（https://minecraft-okinawa.com/）