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phaser/changelog/3.60/TweenManager.md
samme 76a6786fba Docs: change persists to persist
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Phaser 3.60.0 Change Log

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New Feature - New Tween Manager

Tween Manager

TODO - TweenData to class TODO - TweenData and Tween State methods TODO - CONST removals

The Phaser 3.60 Tween system has been rewritten to help with performance, resolve some of its lingering issues and unifies the Tween events and callbacks.

The following are breaking changes:

  • Tween Timelines have been removed entirely. Due to the way they were implemented they tended to cause a range of esoteric timing bugs which were non-trivial to resolve. To that end, we made the decision to remove Timelines entirely and introduced the ability to chain tweens together using the new chain method. This should give most developers the same level of sequencing they had using Timelines, without the timing issues.
  • The Tween.seek method used to take a value between 0 and 1, based on how far through the Tween you wished to seek. However, it did not work with infinitely looping or repeating Tweens and would crash the browser tab. The new seek method takes a value in milliseconds instead and works perfectly on infinite Tweens.
  • When creating a Tween, you can no longer pass a function for the following properties: duration, hold, repeat and repeatDelay. These should be numbers only. You can, however, still provide a function for delay, to keep it compatible with the StaggerBuilder.
  • The TweenManager#getAllTweens method has been renamed to TweenManager#getTweens. Functionally, it is the same.
  • The property and feature Tween.useFrames has been removed and is no longer a valid Tween Config option. Tweens are now entirely millisecond based.
  • The TweenOnUpdateCallback now has the following parameters: tween, targets, key (the property being tweened), current (the current value of the property), previous (the previous value of the property) and finally any of the params that were passed in the onUpdateParams array when the Tween was created.
  • The TweenOnYoyoCallback now has the following parameters: tween, targets, key (the property being tweened), current (the current value of the property), previous (the previous value of the property) and finally any of the params that were passed in the onYoyoParams array when the Tween was created.
  • The TweenOnRepeatCallback now has the following parameters: tween, targets, key (the property being tweened), current (the current value of the property), previous (the previous value of the property) and finally any of the params that were passed in the onRepeatParams array when the Tween was created.
  • Tween.stop has had the resetTo parameter removed from it. Calling stop on a Tween will now prepare the tween for immediate destruction. If you only wish to pause the tween, see Tween.pause instead.
  • Tweens will now be automatically destroyed by the Tween Manager upon completion. This helps massively in reducing stale references and memory consumption. However, if you require your Tween to live-on, even after playback, then you can now specify a new persist boolean flag when creating it, or toggle the Tween.persist property before playback. This will force the Tween to not be destroyed by the Tween Manager, allowing you to replay it at any later point. The trade-off is that you are now entirely responsible for destroying the Tween when you are finished with it, in order to free-up resources.
  • All of the 'Scope' tween configuration callback properties have been removed, including onActiveScope, onCompleteScope, onLoopScope, onPauseScope, onRepeatScope, onResumeScope, onStartScope, onStopScope, onUpdateScope and onYoyoScope. You should set the callbackScope property instead, which will globally set the scope for all callbacks. You can also set the Tween.callbackScope property.

The following are to do with the new Chained Tweens feature:

  • TweenManager.chain - TODO

  • Tween.getChainedTweens is a new method that will return all of the tweens in a chained sequence, starting from the point of the Tween this is called on.

  • TweenManager.getChainedTweens(tween) is a new method that will return all of the tweens in a chained sequence, starting from the given tween.

  • You can now specify a target property as 'random' to have the Tween pick a random float between two given values, for example: alpha: 'random(0.25, 0.75)'. If you wish to force it to select a random integer, use 'int' instead: x: 'int(300, 600)'.

The following are further updates within the Tween system:

  • TweenManager.add and TweenManager.create can now optionally take an array of Tween Configuration objects. Each Tween will be created, added to the Tween Manager and then returned in an array. You can still pass in a single config if you wish.
  • Tween.pause is a new method that allows you to pause a Tween. This will emit the PAUSE event and, if set, fire the onPause callback.
  • Tween.resume is a new method that allows you to resume a paused Tween. This will emit the RESUME event and, if set, fire the onResume callback.
  • There is a new TweenOnPauseCallback available when creating a Tween (via the onPause property). This comes with associated onPauseParams and onPauseScope properties, too, like all other callbacks and can also be added via the Tween.setCallbacks method. This callback is invoked if you pause the Tween.
  • There is a new TweenOnResumeCallback available when creating a Tween (via the onResume property). This comes with associated onResumeParams and onResumeScope properties, too, like all other callbacks and can also be added via the Tween.setCallbacks method. This callback is invoked if you resume a previously paused Tween.
  • The property value of a Tween can now be an array, i.e. x: [ 100, 300, 200, 600 ] in which case the Tween will use interpolation to determine the value.
  • You can now specify an interpolation property in the Tween config to set which interpolation method the Tween will use if an array of numeric values have been given as the tween value. Valid values includes linear, bezier and catmull (or catmullrom), or you can provide your own function to use.
  • You can now specify a scale property in a Tween config and, if the target does not have a scale property itself (i.e. a GameObject) then it will automatically apply the value to both scaleX and scaleY together during the tween. This is a nice short-cut way to tween the scale of Game Objects by only specifying one property, instead of two.
  • killTweensOf(targets) now supports deeply-nested arrays of items as the target parameter. Fix #6016 (thanks @michalfialadev)
  • killTweensOf(target) did not stop target tweens if called immediately after tween creation. Fix #6173 (thanks @michalfialadev)
  • It wasn't possible to resume a Tween that was immediately paused after creation. Fix #6169 (thanks @trynx)
  • Calling Tween.setCallback() without specifying the params argument would cause an error invoking the callback params. This parameter is now fully optional. Fix #6047 (thanks @orcomarcio)
  • Calling Tween.play immediately after creating a tween with paused: true in the config wouldn't start playback. Fix #6005 (thanks @MartinEyebab)
  • Fixed an issue where neither Tweens or Timelines would factor in the Tween Manager timeScale value unless they were using frame-based timing instead of delta timing.
  • The first parameter to Tween.seek, toPosition now defaults to zero. Previously, you had to specify a value.
  • The TweenBuilder now uses the new GetInterpolationFunction function internally.
  • The TweenBuilder has been optimized to perform far less functions when creating the TweenData instances.
  • The keyword interpolation has been added to the Reserved Words list and Defaults list (it defaults to null).
  • The keyword persist has been added to the Reserved Words list and Defaults list (it defaults to false).
  • Tween.initTweenData is a new method that handles the initialisation of all the Tween Data and Tween values. This replaces what took place in the init and seek methods previously. This is called automatically and should not usually be invoked directly.
  • The internal Tween.calcDuration method has been removed. This is now handled as part of the initTweenData call.
  • Fixed a bug where setting repeat and hold would cause the Tween to include one final hold before marking itself as complete. It now completes as soon as the final repeat concludes, not after an addition hold.
  • TweenManager.reset is a new method that will take a tween, remove it from all internal arrays, then seek it back to its start and set it as being active.
  • dispatchTweenEvent would overwrite one of the callback's parameters. This fix ensures that Tween.setCallback now works consistently. Fix #5753 (thanks @andrei-pmbcn @samme)
  • Calling Tween.reset when a tween was in a state of PENDING_REMOVE would cause it to fail to restart. It now restarts fully. Fix #4793 (thanks @spayton)
  • The default Tween._pausedState has changed from INIT to PENDING_ADD. This fixes a bug where if you called Tween.play immediately after creating it, it would force the tween to freeze. Fix #5454 (thanks @michal-bures)
  • Calling Tween.stop(0) would run for an additional delta before stopping, causing the Tween to not be truly 100% "reset". Fix #5986 (thanks @Mesonyx)

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