Add a note about `SceneTree.create_tween()` method #81087

mateuseap · 2023-08-28T19:32:06Z

What I did

I've added a note about create_tween() method of SceneTree class.

Closes: #7796 (issue from godot-docs repo)

doc/classes/Tween.xml

AThousandShips · 2023-08-28T19:50:48Z

doc/classes/Tween.xml

@@ -6,7 +6,8 @@
 	<description>
 		Tweens are mostly useful for animations requiring a numerical property to be interpolated over a range of values. The name [i]tween[/i] comes from [i]in-betweening[/i], an animation technique where you specify [i]keyframes[/i] and the computer interpolates the frames that appear between them. Animating something with a [Tween] is called tweening.
 		[Tween] is more suited than [AnimationPlayer] for animations where you don't know the final values in advance. For example, interpolating a dynamically-chosen camera zoom value is best done with a [Tween]; it would be difficult to do the same thing with an [AnimationPlayer] node. Tweens are also more light-weight than [AnimationPlayer], so they are very much suited for simple animations or general tasks that don't require visual tweaking provided by the editor. They can be used in a fire-and-forget manner for some logic that normally would be done by code. You can e.g. make something shoot periodically by using a looped [CallbackTweener] with a delay.
-		A [Tween] can be created by using either [method SceneTree.create_tween] or [method Node.create_tween]. [Tween]s created manually (i.e. by using [code]Tween.new()[/code]) are invalid and can't be used for tweening values.
+		A [Tween] can be created by using either [method SceneTree.create_tween] or [method Node.create_tween]. [Tween]s created manually (i.e. by using [code]Tween.new()[/code]) are invalid and can't be used for tweening values. 
+		[b]Note:[/b] When creating a [Tween] by using [method SceneTree.create_tween] the [Tween] will be detached from the actual [Node] and it won't be killed when the [Node] is freed. Prefer using [method Node.create_tween] if you want the [Tween] to be automatically killed when the [Node] is freed.


Move this below to the other "Note" cases

Done! I've moved this note to the end of the description section, where the other notes are located.

doc/classes/Tween.xml

mateuseap · 2023-08-28T21:39:44Z

@AThousandShips I've adjust the PR name and description, squashed all the commits and adjusted the commit message!

akien-mga · 2023-08-28T21:58:45Z

Like for #81088 (comment), I'd ask to amend the commit message to remove the Conventional Commit boilerplate which is not the format we use in this repo. This PR's title as we adjusted it would make a fine descriptive commit title.

akien-mga · 2023-08-29T07:22:33Z

Final nitpick: in the body of the commit message, you have a lot of past commit messages which are not relevant to the final state of this change:

I would edit it to be simply:

Add a note about Tween creation in its class description

Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com>

mateuseap · 2023-08-29T08:22:09Z

@akien-mga done! I forgot to adjust it earlier, but now the commit description looks good. Thanks for the patient and all the help :)

akien-mga · 2023-08-29T08:34:18Z

Looks good!

No need to change it further, but FYI, technically that commit message still has a redundant title both in the title field (first line) and the first line of the commit body (third line).

In the git log it will look like this:

Add a note about Tween creation in its class description

Add a note about Tween creation in its class description.

Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com>

KoBeWi · 2023-08-29T11:26:41Z

doc/classes/Tween.xml

@@ -91,6 +91,7 @@
 		[url=https://raw.githubusercontent.com/godotengine/godot-docs/master/img/tween_cheatsheet.webp]Tween easing and transition types cheatsheet[/url]
 		[b]Note:[/b] Tweens are not designed to be re-used and trying to do so results in an undefined behavior. Create a new Tween for each animation and every time you replay an animation from start. Keep in mind that Tweens start immediately, so only create a Tween when you want to start animating.
 		[b]Note:[/b] The tween is processed after all of the nodes in the current frame, i.e. node's [method Node._process] method would be called before the tween (or [method Node._physics_process] depending on the value passed to [method set_process_mode]).
+		[b]Note:[/b] When creating a [Tween] by using [method SceneTree.create_tween] the [Tween] will be detached from the actual [Node] and it won't be killed when the [Node] is freed. Prefer using [method Node.create_tween] if you want the [Tween] to be automatically killed when the [Node] is freed.


This is not entirely true. When a Node is freed, PropertyTweeners that target it will end automatically and Tween will kill itself if it has no Tweeners to animate. I think if Callable's get_object() return value is reliable, we could add a similar safeguard to MethodTweener and CallbackTweener to prevent errors.
By "not entirely true" I mean that Tween will continue to animate, but it will finish if there is nothing to animate (this is mostly relevant if you are also animating other objects).

Also shouldn't this note be in SceneTree.create_tween() description instead?

@KoBeWi I've rewritten the note and moved it to SceneTree class reference file

AThousandShips · 2023-08-31T18:49:36Z

doc/classes/SceneTree.xml

@@ -90,6 +90,7 @@
 			<return type="Tween" />
 			<description>
 				Creates and returns a new [Tween]. The Tween will start automatically on the next process frame or physics frame (depending on [enum Tween.TweenProcessMode]).
+				[b]Note:[/b] When creating a [Tween] using [method SceneTree.create_tween], the [Tween] will be detached from the actual [Node]. It will continue to animate even if the [Node] is freed, but it will automatically finish if there's nothing left to animate. If you want the [Tween] to be automatically killed when the [Node] is freed, prefer using [method Node.create_tween].


Suggested change

[b]Note:[/b] When creating a [Tween] using [method SceneTree.create_tween], the [Tween] will be detached from the actual [Node]. It will continue to animate even if the [Node] is freed, but it will automatically finish if there's nothing left to animate. If you want the [Tween] to be automatically killed when the [Node] is freed, prefer using [method Node.create_tween].

[b]Note:[/b] When creating a [Tween] using this method, the [Tween] will be detached from the actual [Node]. It will continue to animate even if the [Node] is freed, but it will automatically finish if there's nothing left to animate. If you want the [Tween] to be automatically killed when the [Node] is freed, prefer using [method Node.create_tween].

No need to mention the method itself here

Thanks, mention removed

doc/classes/SceneTree.xml

KoBeWi

One last comment, otherwise looks ok.

Add note regarding SceneTree.create_tween() method behavior. Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com> Co-authored-by: Tomek <kobewi4e@gmail.com>

akien-mga · 2023-09-01T14:11:04Z

Thanks!

mateuseap requested a review from a team as a code owner August 28, 2023 19:32

AThousandShips added enhancement topic:core documentation labels Aug 28, 2023

AThousandShips added this to the 4.x milestone Aug 28, 2023

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mateuseap changed the title ~~Add an alert in Tween class description~~ Add a note in Tween class description Aug 28, 2023

mateuseap force-pushed the docs/tweenClassReference branch 2 times, most recently from 38a8698 to 639e527 Compare August 28, 2023 21:37

mateuseap requested a review from AThousandShips August 28, 2023 21:38

akien-mga changed the title ~~Add a note in Tween class description~~ Add a note about Tween creation in its class description Aug 28, 2023

akien-mga modified the milestones: 4.x, 4.2 Aug 28, 2023

mateuseap force-pushed the docs/tweenClassReference branch from 639e527 to 26f8207 Compare August 28, 2023 22:03

mateuseap force-pushed the docs/tweenClassReference branch from 26f8207 to 99dabaf Compare August 29, 2023 08:18

mateuseap force-pushed the docs/tweenClassReference branch from 99dabaf to 08892d7 Compare August 29, 2023 08:31

akien-mga requested a review from KoBeWi August 29, 2023 08:34

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Prevent errors if Tween callback's object is freed #81127

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mateuseap force-pushed the docs/tweenClassReference branch from 08892d7 to efe7199 Compare August 31, 2023 18:38

mateuseap changed the title ~~Add a note about Tween creation in its class description~~ Add a note about create_tween() method of Scene class Aug 31, 2023

mateuseap changed the title ~~Add a note about create_tween() method of Scene class~~ Add a note about create_tween() method of SceneTree class Aug 31, 2023

mateuseap force-pushed the docs/tweenClassReference branch from efe7199 to 4447c22 Compare August 31, 2023 18:40

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mateuseap force-pushed the docs/tweenClassReference branch from 4447c22 to c172d1f Compare August 31, 2023 18:57

mateuseap changed the title ~~Add a note about create_tween() method of SceneTree class~~ Add a note about SceneTree.create_tween() method Aug 31, 2023

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Add a note about create_tween() method of SceneTree class

5030549

Add note regarding SceneTree.create_tween() method behavior. Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com> Co-authored-by: Tomek <kobewi4e@gmail.com>

mateuseap force-pushed the docs/tweenClassReference branch from ec33813 to 5030549 Compare August 31, 2023 20:50

akien-mga merged commit fa3072f into godotengine:master Sep 1, 2023

mateuseap deleted the docs/tweenClassReference branch September 3, 2023 20:32

akien-mga removed the topic:core label Nov 29, 2023

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Add a note about `SceneTree.create_tween()` method #81087

Add a note about `SceneTree.create_tween()` method #81087

mateuseap commented Aug 28, 2023 •

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akien-mga commented Sep 1, 2023

	[b]Note:[/b] When creating a [Tween] using [method SceneTree.create_tween], the [Tween] will be detached from the actual [Node]. It will continue to animate even if the [Node] is freed, but it will automatically finish if there's nothing left to animate. If you want the [Tween] to be automatically killed when the [Node] is freed, prefer using [method Node.create_tween].
	[b]Note:[/b] When creating a [Tween] using this method, the [Tween] will be detached from the actual [Node]. It will continue to animate even if the [Node] is freed, but it will automatically finish if there's nothing left to animate. If you want the [Tween] to be automatically killed when the [Node] is freed, prefer using [method Node.create_tween].

Add a note about SceneTree.create_tween() method #81087

Add a note about SceneTree.create_tween() method #81087

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mateuseap commented Aug 28, 2023 • edited Loading

What I did

Closes: #7796 (issue from godot-docs repo)

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akien-mga commented Sep 1, 2023

Add a note about `SceneTree.create_tween()` method #81087

Add a note about `SceneTree.create_tween()` method #81087

mateuseap commented Aug 28, 2023 •

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mateuseap commented Aug 29, 2023 •

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