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Basalt2/docs/references/plugins/animation.md
2025-09-14 10:11:36 +00:00

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# AnimationInstance
_This is the AnimationInstance class. It represents a single animation instance_
## Functions
|Method|Returns|Description|
|---|---|---|
|[AnimationInstance.new](#animationinstance-new-element-animtype-args-duration-easing)|AnimationInstance|Creates a new animation instance|
|[AnimationInstance:start](#animationinstance-start)|AnimationInstance|Starts the animation|
|[AnimationInstance:update](#animationinstance-update-elapsed)|boolean|Updates the animation|
|[AnimationInstance:complete](#animationinstance-complete)|-|Called when the animation is completed|
## AnimationInstance.new(element, animType, args, duration, easing)
Creates a new AnimationInstance
### Parameters
* `element` `VisualElement` The element to animate
* `animType` `string` The type of animation
* `args` `table` The animation arguments
* `duration` `number` Duration in seconds
* `easing` `string` The easing function name
### Returns
* `AnimationInstance` `The` new animation instance
## AnimationInstance:start()
Starts the animation
### Returns
* `AnimationInstance` `self` The animation instance
## AnimationInstance:update(elapsed)
Updates the animation
### Parameters
* `elapsed` `number` The elapsed time in seconds
### Returns
* `boolean` `Whether` the animation is finished
## AnimationInstance:complete()
Gets called when the animation is completed
# Animation
_This is the animation plugin. It provides a animation system for visual elements_
_with support for sequences, easing functions, and multiple animation types._
## Functions
|Method|Returns|Description|
|---|---|---|
|[Animation.registerAnimation](#animation-registeranimation-name-handlers)|-|Registers a custom animation type|
|[Animation.registerEasing](#animation-registereasing-name-func)|-|Adds a custom easing function|
|[Animation.new](#animation-new-element)|Animation|Creates a new animation|
|[Animation:sequence](#animation-sequence)|Animation|Creates a new sequence|
|[Animation:onStart](#animation-onstart-callback)|-|Registers a callback for the start event|
|[Animation:onUpdate](#animation-onupdate-callback)|Animation|Registers a callback for the update event|
|[Animation:onComplete](#animation-oncomplete-callback)|Animation|Registers a callback for the complete event|
|[Animation:addAnimation](#animation-addanimation-type-args-duration-easing)|-|Adds a new animation to the sequence|
|[Animation:start](#animation-start)|Animation|Starts the animation|
|[Animation:event](#animation-event-event-timerid)|-|The event handler for the animation|
|[Animation:stop](#animation-stop)|-|Stops the animation|
## Animation.registerAnimation(name, handlers)
Registers a new animation type
### Parameters
* `name` `string` The name of the animation
* `handlers` `table` Table containing start, update and complete handlers
### Usage
```lua
Animation.registerAnimation("fade", {start=function(anim) end, update=function(anim,progress) end})
```
## Animation.registerEasing(name, func)
Registers a new easing function
### Parameters
* `name` `string` The name of the easing function
* `func` `function` The easing function (takes progress 0-1, returns modified progress)
## Animation.new(element)
Creates a new Animation
### Parameters
* `element` `VisualElement` The element to animate
### Returns
* `Animation` `The` new animation
## Animation:sequence()
Creates a new sequence
### Returns
* `Animation` `self` The animation instance
## Animation:onStart(callback)
Registers a callback for the start event
### Parameters
* `callback` `function` The callback function to register
## Animation:onUpdate(callback)
Registers a callback for the update event
### Parameters
* `callback` `function` The callback function to register
### Returns
* `Animation` `self` The animation instance
## Animation:onComplete(callback)
Registers a callback for the complete event
### Parameters
* `callback` `function` The callback function to register
### Returns
* `Animation` `self` The animation instance
## Animation:addAnimation(type, args, duration, easing)
Adds a new animation to the sequence
### Parameters
* `type` `string` The type of animation
* `args` `table` The animation arguments
* `duration` `number` The duration in seconds
* `easing` `string` The easing function name
## Animation:start()
Starts the animation
### Returns
* `Animation` `self` The animation instance
## Animation:event(event, timerId)
The event handler for the animation (listens to timer events)
### Parameters
* `event` `string` The event type
* `timerId` `number` The timer ID
## Animation:stop()
Stops the animation immediately: cancels timers, completes running anim instances and clears the element property
# VisualElement
_Adds additional methods for VisualElement when adding animation plugin_
## Functions
|Method|Returns|Description|
|---|---|---|
|[VisualElement.stopAnimation](#visualelement-stopanimation)|-|Convenience to stop animations from the element|
|[VisualElement:animate](#visualelement-animate)|Animation|Creates a new animation|
## VisualElement.stopAnimation()
Convenience to stop animations from the element
## VisualElement:animate()
Creates a new Animation Object
### Returns
* `Animation` `animation` The new animation