Chapter 645: Clock

Core Idea

Class for keeping track of time.

autoStart : boolean: If set to true, the clock starts automatically when getDelta() is called for the first time.
elapsedTime : number: Keeps track of the total time that the clock has been running.
oldTime : number: Holds the time at which the clock's start(), getElapsedTime() or getDelta() methods were last called.
running : boolean: Whether the clock is running or not.
startTime : number: Holds the time at which the clock's start() method was last called.

Constructor

Signature
`new Clock( autoStart : boolean )`

Properties

Property	Description
`.autoStart : boolean`	If set to `true`, the clock starts automatically when `getDelta()` is called for the first time.
`.elapsedTime : number`	Keeps track of the total time that the clock has been running.
`.oldTime : number`	Holds the time at which the clock's `start()`, `getElapsedTime()` or `getDelta()` methods were last called.
`.running : boolean`	Whether the clock is running or not.
`.startTime : number`	Holds the time at which the clock's `start()` method was last called.

Methods

Method	Description
`.getDelta() : number`	Returns the delta time in seconds.
`.getElapsedTime() : number`	Returns the elapsed time in seconds.
`.start()`	Starts the clock. When `autoStart` is set to `true`, the method is automatically called by the class.
`.stop()`	Stops the clock.