Game Script

Usage

1. Write the script by referring to the writing style of the Template and Example.
2. Import the script into the editor.
3. If the script uses Collision Events or Trigger Events, ensure the item has enabled and properly configured the corresponding components and features.
4. Add the script in the Executor component and set up the necessary variables.
5. Enter the game, and the script will execute automatically.

Hooks

The game provides a total of 6 hooks, see BST/_Typings/gameApi/exportFuncs.d.ts.

init

export const init: (self: Item, vars: { [key: string]: any }) => void

Executed when the executor loads the script. It executes before all other events and only executes once.

WARNING

Do not perform any operations on in-game objects in this function, because the scene has not finished loading at this point.

• self: A reference to the item where the executor component is located.
• vars: The variables set on the executor, passed in as key-value pairs.

execute

export const execute: (...args: any[]) => void

Executed when execute() is called by another executor in the game.

registerEvents

export const registerEvents: RegisterEvent[]

Exports a string array to register the events it needs to receive.

Event List

WARNING

All messages passed in events are in the form of an array.

• OnPhysicsUpdate Physics update
• OnLoadLevel When the level has finished loading, before the level starts
• OnStartLevel When the level starts, including the first time and after restarting
• OnQuitLevel When quitting the level without finishing
• OnTimerActive When the player ball is spawned and the timer is enabled
• OnPreRestartLevel Before executing a level restart
  • Cancellable
  • Does not include restarts after completing the level
• OnPostRestartLevel After executing a level restart
• OnPrePlayerDeadStart Before the player falls into a death area / durability reaches zero / suicides
  • Cancellable
• OnPostPlayerDeadStart After the player falls into a death area / durability reaches zero / suicides
• OnPlayerDeadEnd After the death animation ends
• OnPreCheckpointReached Before reaching a checkpoint
  • Message: [Item] the checkpoint item
  • Cancellable
• OnPostCheckpointReached After reaching a checkpoint
  • Message: [Item] the checkpoint item
• OnPreDestinationReached Before reaching the destination
  • Message: [Item] the destination item
  • Cancellable
• OnPostDestinationReached After reaching the destination
  • Message: [Item] the destination item
• OnPreGetCollection Before getting a collection
  • Message: string[] the name of the collection being collected
  • Cancellable
• OnPostGetCollection After getting a collection
  • Message: string[] the name of the collection being collected
• OnPreSwitchBallStart Before the ball switch animation starts
  • Message: [BallType] the ball type being switched to
  • Cancellable
• OnPreSwitchBallEnd Before the ball switch animation ends
  • Message: [BallType] the ball type being switched to
  • Cancellable
• OnPostSwitchBallEnd After the ball switch animation ends
  • Message: [BallType] the ball type being switched to
• OnPreTransferBallStart Before the ball transfer animation starts
  • Message: [Item, Item] the teleporter items; the first is the current one, the second is the target
  • Cancellable
• OnPreTransferBallEnd Before the ball transfer animation ends
  • Message: [Item, Item] the teleporter items; the first is the current one, the second is the target
  • Cancellable
• OnPostTransferBallEnd After the ball transfer animation ends
  • Message: [Item, Item] the teleporter items; the first is the current one, the second is the target
• OnPlayerCollideEnter Player collision enter event
  • Message: CollisionEvent[] the collision events
• OnPlayerCollideStay Player collision stay event
  • Message: CollisionEvent[] the collision events
• OnPlayerCollideExit Player collision exit event
  • Message: CollisionEvent[] the collision events
• OnReceiveCustomEvent When a custom event is received
  • Message: any[] the value of the custom event
• OnTntExploded TNT explosion event
  • Message: Float3[] the explosion positions of all TNTs

onEvents

export const onEvents: (self: Item, events: Events) => void

Executed when a registered event is triggered.

• self: A reference to the item where the executor component is located.
• events: The triggered events and their passed messages, passed in as key-value pairs. The key is the event name, and the value is the passed message array.

onTrigger

export const onTrigger: (
  self: Item,
  triggeredItem: Item | Player,
  type: "Enter" | "Stay" | "Exit"
) => void

Executed when a trigger is activated.

• self: A reference to the item where the trigger component is located.
• triggeredItem: A reference to the item or player that activated the trigger.
• type: The type of trigger event.

onCollide

export const onCollide: (self: Item, collisionEvent: CollisionEvent) => void

Executed when an object collides.

• self: A reference to the object on which the collision occurred.
• collisionEvent: The collision event object, which contains information about the colliding object, the type of collision, the position of the collision, etc.

Modules

The game provides the following 10 modules:

• audioManager
• console
• inputManager
• levelManager
• scene
• settings
• tweenManager
• uiCanvas
• variables
• math

For details, see BST/_Typings/gameApi/modules.

To import modules, use the following syntax:

import {
  // modules
  console,
  scene,
  variables,
  settings,
  audioManager,
  levelManager,
  inputManager,
  tweenManager,
  math,
  uiCanvas,

  // basic data types
  Float2,
  Float3,
  Float4,
  ColorRGBA,
  Bool3,
  Trans,
  Quaternion,
} from "gameApi"

TIP

To import custom modules from within the project, please use BME's resource path, for example:

import { dotProduct } from "Scripts/Utility/MathExtension.js"

WARNING

The .js suffix cannot be omitted here.

Template

See BST/Templates/gameTemplate.js.

Example

See BST/Samples/gameSamples.