Class: FadeAlphaAction

The Action class has static methods for creating actions to be executed by an M2Node.

Extends

• Action

Constructors

new FadeAlphaAction()

new FadeAlphaAction(alpha, duration, runDuringTransition): FadeAlphaAction

Parameters

• alpha: number

• duration: Futurable

• runDuringTransition: boolean = false

Returns

FadeAlphaAction

Overrides

Action.constructor

Defined in

m2c2kit/packages/core/src/Action.ts:1246

Properties

alpha

alpha: number

Defined in

m2c2kit/packages/core/src/Action.ts:1243

---

delta

delta: number = 0

Defined in

m2c2kit/packages/core/src/Action.ts:1244

---

duration

duration: Futurable

Inherited from

Action.duration

Defined in

m2c2kit/packages/core/src/Action.ts:39

---

key?

optional key: string

Inherited from

Action.key

Defined in

m2c2kit/packages/core/src/Action.ts:42

---

parent?

optional parent: ActionContainer

Inherited from

Action.parent

Defined in

m2c2kit/packages/core/src/Action.ts:41

---

runDuringTransition

runDuringTransition: boolean

Inherited from

Action.runDuringTransition

Defined in

m2c2kit/packages/core/src/Action.ts:40

---

running

running: boolean = false

Inherited from

Action.running

Defined in

m2c2kit/packages/core/src/Action.ts:32

---

runStartTime

runStartTime: number = -1

Start time of a running action is always known; it is not a Futurable. -1 indicates that the root action has not yet started running.

Inherited from

Action.runStartTime

Defined in

m2c2kit/packages/core/src/Action.ts:38

---

started

started: boolean = false

Inherited from

Action.started

Defined in

m2c2kit/packages/core/src/Action.ts:31

---

startOffset

startOffset: Futurable

Inherited from

Action.startOffset

Defined in

m2c2kit/packages/core/src/Action.ts:30

---

type

type: ActionType = ActionType.FadeAlpha

Overrides

Action.type

Defined in

m2c2kit/packages/core/src/Action.ts:1242

Accessors

completed

Get Signature

get completed(): boolean

Indicates whether the action has completed.

Returns

boolean

Set Signature

set completed(value): void

Parameters

• value: boolean

Returns

void

Inherited from

Action.completed

Defined in

m2c2kit/packages/core/src/Action.ts:948

Methods

assignRunStartTimes()

assignRunStartTimes(action, runStartTime): void

Assigns RunStartTime to all actions in the hierarchy.

Parameters

• action: Action

the action to assign RunStartTime to

• runStartTime: number

Returns

void

Remarks

Uses recursion to handle arbitrary level of nesting parent actions within parent actions.

Inherited from

Action.assignRunStartTimes

Defined in

m2c2kit/packages/core/src/Action.ts:651

---

clone()

clone(): FadeAlphaAction

Clones the action, and any actions it contains, recursively.

Returns

FadeAlphaAction

a clone of the action

Remarks

We need to clone an action before running it because actions have state that is updated over time such as whether they are running or not, etc. If we didn't clone actions, two nodes reusing the same action would share state. On Action, this method is abstract and is implemented in each subclass.

Overrides

Action.clone

Defined in

m2c2kit/packages/core/src/Action.ts:1251

---

initialize()

initialize(key?): Action

Prepares the Action for evaluation.

Parameters

• key?: string

optional string to identify an action

Returns

Action

action prepared for evaluation

Remarks

Calculates start times for all actions in the hierarchy and returns a copy of the action that is prepared for evaluation during the update loop.

Inherited from

Action.initialize

Defined in

m2c2kit/packages/core/src/Action.ts:58

---

isParent()

isParent(action): action is ActionContainer

Type guard that returns true if the action is a parent action.

Parameters

• action: Action

action to check

Returns

action is ActionContainer

true if the action is a parent action

Remarks

Parent actions are Group, Sequence, Repeat, and RepeatForever actions.

Inherited from

Action.isParent

Defined in

m2c2kit/packages/core/src/Action.ts:918

---

restartAction()

restartAction(action, now): void

Configures action to be run again.

Parameters

• action: Action

action to restart

• now: number

current time

Returns

void

Remarks

This method is called on a repeating action's children when they need to be run again.

Inherited from

Action.restartAction

Defined in

m2c2kit/packages/core/src/Action.ts:669

---

shouldBeRunning()

shouldBeRunning(now): boolean

Determines if the action should be running.

Parameters

• now: number

current time

Returns

boolean

true if the action should be running

Remarks

An action should be running if current time is in the interval [ start time + start offset, start time + start offset + duration ]

Inherited from

Action.shouldBeRunning

Defined in

m2c2kit/packages/core/src/Action.ts:708

---

custom()

static custom(options): CustomAction

Creates an action that will execute a callback function.

Parameters

• options: CustomActionOptions

CustomActionOptions

Returns

CustomAction

The custom action

Inherited from

Action.custom

Defined in

m2c2kit/packages/core/src/Action.ts:750

---

evaluateAction()

static evaluateAction(action, node, now, dt): void

Evaluates an action, updating the node's properties as needed.

Parameters

• action: Action

the Action to be evaluated and possibly run

• node: M2Node

the M2Node that the action will be run on

• now: number

the current elapsed time, from performance.now()

• dt: number

the time since the last frame (delta time)

Returns

void

Remarks

This method is called every frame by the M2Node's update() method.

Inherited from

Action.evaluateAction

Defined in

m2c2kit/packages/core/src/Action.ts:280

---

fadeAlpha()

static fadeAlpha(options): FadeAlphaAction

Creates an action that will change the node's alpha (opacity).

Parameters

• options: FadeAlphaActionOptions

FadeAlphaActionOptions

Returns

FadeAlphaAction

The fadeAlpha action

Remarks

Alpha has multiplicative inheritance. For example, if the node's parent is alpha .5 and this node's action fades alpha to .4, then the node will appear with alpha .2.

Inherited from

Action.fadeAlpha

Defined in

m2c2kit/packages/core/src/Action.ts:799

---

group()

static group(actions): GroupAction

Create an array of actions that will be run simultaneously.

Parameters

• actions: Action[]

One or more actions that form the group

Returns

GroupAction

Remarks

All actions within the group will begin to run at the same time. The group will be considered completed when the longest-running action has completed.

Inherited from

Action.group

Defined in

m2c2kit/packages/core/src/Action.ts:876

---

move()

static move(options): MoveAction

Creates an action that will move a node to a point on the screen.

Parameters

• options: MoveActionOptions

MoveActionOptions

Returns

MoveAction

The move action

Inherited from

Action.move

Defined in

m2c2kit/packages/core/src/Action.ts:721

---

play()

static play(options?): PlayAction

Creates an action that will play a sound.

Parameters

• options?: PlayActionOptions

PlayActionOptions

Returns

PlayAction

The play action

Remarks

This action can only be used with a SoundPlayer node. It will throw an error if used with any other node type.

Inherited from

Action.play

Defined in

m2c2kit/packages/core/src/Action.ts:766

---

repeat()

static repeat(options): RepeatAction

Creates an action that will repeat another action a given number of times.

Parameters

• options: RepeatActionOptions

RepeatActionOptions

Returns

RepeatAction

The repeat action

Inherited from

Action.repeat

Defined in

m2c2kit/packages/core/src/Action.ts:888

---

repeatForever()

static repeatForever(options): RepeatForeverAction

Creates an action that will repeat another action forever.

Parameters

• options: RepeatForeverActionOptions

RepeatForeverActionOptions

Returns

RepeatForeverAction

The repeat forever action

Remarks

A repeat forever action is a special case of a repeat action where the count is set to infinity.

Inherited from

Action.repeatForever

Defined in

m2c2kit/packages/core/src/Action.ts:905

---

rotate()

static rotate(options): RotateAction

Creates an action that will rotate the node.

Parameters

• options: RotateActionOptions

RotateActionOptions

Returns

RotateAction

The rotate action

Remarks

Rotate actions are applied to their children. In addition to this node's rotate action, all ancestors' rotate actions will also be applied.

Inherited from

Action.rotate

Defined in

m2c2kit/packages/core/src/Action.ts:816

---

scale()

static scale(options): ScaleAction

Creates an action that will scale the node's size.

Parameters

• options: ScaleActionOptions

ScaleActionOptions

Returns

ScaleAction

The scale action

Remarks

Scaling is relative to any inherited scaling, which is multiplicative. For example, if the node's parent is scaled to 2.0 and this node's action scales to 3.0, then the node will appear 6 times as large as original.

Inherited from

Action.scale

Defined in

m2c2kit/packages/core/src/Action.ts:781

---

sequence()

static sequence(actions): SequenceAction

Creates an array of actions that will be run in order.

Parameters

• actions: Action[]

One or more actions that form the sequence

Returns

SequenceAction

Remarks

The next action will not begin until the current one has finished. The sequence will be considered completed when the last action has completed.

Inherited from

Action.sequence

Defined in

m2c2kit/packages/core/src/Action.ts:860

---

wait()

static wait(options): WaitAction

Creates an action that will wait a given duration before it is considered complete.

Parameters

• options: WaitActionOptions

WaitActionOptions

Returns

WaitAction

The wait action

Inherited from

Action.wait

Defined in

m2c2kit/packages/core/src/Action.ts:737