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| -rw-r--r-- | doc/classes/Tween.xml | 40 |
1 files changed, 20 insertions, 20 deletions
diff --git a/doc/classes/Tween.xml b/doc/classes/Tween.xml index f9ec0d115d..b18232f5c3 100644 --- a/doc/classes/Tween.xml +++ b/doc/classes/Tween.xml @@ -4,41 +4,41 @@ Lightweight object used for general-purpose animation via script, using [Tweener]s. </brief_description> <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. + 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] animation is composed of a sequence of [Tweener]s, which by default are executed one after another. You can create a sequence by appending [Tweener]s to the [Tween]. Animating something with a [Tweener] is called tweening. Example tweening sequence looks like this: + A tween animation is created by adding [Tweener]s to the [Tween] object, using [method tween_property], [method tween_interval], [method tween_callback] or [method tween_method]: [codeblock] var tween = get_tree().create_tween() tween.tween_property($Sprite, "modulate", Color.red, 1) tween.tween_property($Sprite, "scale", Vector2(), 1) tween.tween_callback($Sprite.queue_free) [/codeblock] - This sequence will make the [code]$Sprite[/code] node turn red, then shrink and finally the [method Node.queue_free] is called to remove the sprite. See methods [method tween_property], [method tween_interval], [method tween_callback] and [method tween_method] for more usage information. - When a [Tweener] is created with one of the [code]tween_*[/code] methods, a chained method call can be used to tweak the properties of this [Tweener]. For example, if you want to set different transition type in the above example, you can do: + This sequence will make the [code]$Sprite[/code] node turn red, then shrink, before finally calling [method Node.queue_free] to free the sprite. [Tweener]s are executed one after another by default. This behavior can be changed using [method parallel] and [method set_parallel]. + When a [Tweener] is created with one of the [code]tween_*[/code] methods, a chained method call can be used to tweak the properties of this [Tweener]. For example, if you want to set a different transition type in the above example, you can use [method set_trans]: [codeblock] var tween = get_tree().create_tween() tween.tween_property($Sprite, "modulate", Color.red, 1).set_trans(Tween.TRANS_SINE) tween.tween_property($Sprite, "scale", Vector2(), 1).set_trans(Tween.TRANS_BOUNCE) tween.tween_callback($Sprite.queue_free) [/codeblock] - Most of the [Tween] methods can be chained this way too. In this example the [Tween] is bound and have set a default transition: + Most of the [Tween] methods can be chained this way too. In the following example the [Tween] is bound to the running script's node and a default transition is set for its [Tweener]s: [codeblock] var tween = get_tree().create_tween().bind_node(self).set_trans(Tween.TRANS_ELASTIC) tween.tween_property($Sprite, "modulate", Color.red, 1) tween.tween_property($Sprite, "scale", Vector2(), 1) tween.tween_callback($Sprite.queue_free) [/codeblock] - Another interesting use for [Tween]s is animating arbitrary set of objects: + Another interesting use for [Tween]s is animating arbitrary sets of objects: [codeblock] var tween = create_tween() for sprite in get_children(): - tween.tween_property(sprite, "position", Vector2(), 1) + tween.tween_property(sprite, "position", Vector2(0, 0), 1) [/codeblock] In the example above, all children of a node are moved one after another to position (0, 0). - Some [Tweener]s use transitions and eases. The first accepts an [enum TransitionType] constant, and refers to the way the timing of the animation is handled (see [url=https://easings.net/]easings.net[/url] for some examples). The second accepts an [enum EaseType] constant, and controls where the [code]trans_type[/code] is applied to the interpolation (in the beginning, the end, or both). If you don't know which transition and easing to pick, you can try different [enum TransitionType] constants with [constant EASE_IN_OUT], and use the one that looks best. + Some [Tweener]s use transitions and eases. The first accepts a [enum TransitionType] constant, and refers to the way the timing of the animation is handled (see [url=https://easings.net/]easings.net[/url] for some examples). The second accepts an [enum EaseType] constant, and controls where the [code]trans_type[/code] is applied to the interpolation (in the beginning, the end, or both). If you don't know which transition and easing to pick, you can try different [enum TransitionType] constants with [constant EASE_IN_OUT], and use the one that looks best. [url=https://raw.githubusercontent.com/godotengine/godot-docs/master/img/tween_cheatsheet.png]Tween easing and transition types cheatsheet[/url] - [b]Note:[/b] All [Tween]s will automatically start by default. To prevent a [Tween] from autostarting, you can call [method stop] immediately after it was created. + [b]Note:[/b] All [Tween]s will automatically start by default. To prevent a [Tween] from autostarting, you can call [method stop] immediately after it is created. </description> <tutorials> </tutorials> @@ -67,15 +67,15 @@ <return type="bool" /> <argument index="0" name="delta" type="float" /> <description> - Processes the [Tween] by given [code]delta[/code] value, in seconds. Mostly useful when the [Tween] is paused, for controlling it manually. Can also be used to end the [Tween] animation immediately, by using [code]delta[/code] longer than the whole duration. + Processes the [Tween] by the given [code]delta[/code] value, in seconds. This is mostly useful for manual control when the [Tween] is paused. It can also be used to end the [Tween] animation immediately, by setting [code]delta[/code] longer than the whole duration of the [Tween] animation. Returns [code]true[/code] if the [Tween] still has [Tweener]s that haven't finished. - [b]Note:[/b] The [Tween] will become invalid after finished, but you can call [method stop] after the step, to keep it and reset. + [b]Note:[/b] The [Tween] will become invalid in the next processing frame after its animation finishes. Calling [method stop] after performing [method custom_step] instead keeps and resets the [Tween]. </description> </method> <method name="get_total_elapsed_time" qualifiers="const"> <return type="float" /> <description> - Returns the total time in seconds the [Tween] has been animating (i.e. time since it started, not counting pauses etc.). The time is affected by [method set_speed_scale] and [method stop] will reset it to [code]0[/code]. + Returns the total time in seconds the [Tween] has been animating (i.e. the time since it started, not counting pauses etc.). The time is affected by [method set_speed_scale], and [method stop] will reset it to [code]0[/code]. [b]Note:[/b] As it results from accumulating frame deltas, the time returned after the [Tween] has finished animating will be slightly greater than the actual [Tween] duration. </description> </method> @@ -105,7 +105,7 @@ <method name="is_valid"> <return type="bool" /> <description> - Returns whether the [Tween] is valid. A valid [Tween] is a [Tween] contained by the scene tree (i.e. the array from [method SceneTree.get_processed_tweens] will contain this [Tween]). [Tween] might become invalid when it has finished tweening or was killed, also when created with [code]Tween.new()[/code]. Invalid [Tween] can't have [Tweener]s appended, because it can't animate them. + Returns whether the [Tween] is valid. A valid [Tween] is a [Tween] contained by the scene tree (i.e. the array from [method SceneTree.get_processed_tweens] will contain this [Tween]). A [Tween] might become invalid when it has finished tweening, is killed, or when created with [code]Tween.new()[/code]. Invalid [Tween]s can't have [Tweener]s appended. </description> </method> <method name="kill"> @@ -152,8 +152,8 @@ <argument index="0" name="loops" type="int" default="0" /> <description> Sets the number of times the tweening sequence will be repeated, i.e. [code]set_loops(2)[/code] will run the animation twice. - Calling this method without arguments will make the [Tween] run infinitely, until it is either killed by [method kill] or by freeing bound node, or all the animated objects have been freed (which makes further animation impossible). - [b]Warning:[/b] Make sure to always add some duration/delay when using infinite loops. 0-duration looped animations (e.g. single [CallbackTweener] with no delay or [PropertyTweener] with invalid node) are equivalent to infinite [code]while[/code] loops and will freeze your game. If a [Tween]'s lifetime depends on some node, always use [method bind_node]. + Calling this method without arguments will make the [Tween] run infinitely, until either it is killed with [method kill], the [Tween]'s bound node is freed, or all the animated objects have been freed (which makes further animation impossible). + [b]Warning:[/b] Make sure to always add some duration/delay when using infinite loops. To prevent the game freezing, 0-duration looped animations (e.g. a single [CallbackTweener] with no delay) are stopped after a small number of loops, which may produce unexpected results. If a [Tween]'s lifetime depends on some node, always use [method bind_node]. </description> </method> <method name="set_parallel"> @@ -221,7 +221,7 @@ <return type="IntervalTweener" /> <argument index="0" name="time" type="float" /> <description> - Creates and appends an [IntervalTweener]. This method can be used to create delays in the tween animation, as an alternative for using the delay in other [Tweener]s or when there's no animation (in which case the [Tween] acts as a timer). [code]time[/code] is the length of the interval, in seconds. + Creates and appends an [IntervalTweener]. This method can be used to create delays in the tween animation, as an alternative to using the delay in other [Tweener]s, or when there's no animation (in which case the [Tween] acts as a timer). [code]time[/code] is the length of the interval, in seconds. Example: creating an interval in code execution. [codeblock] # ... some code @@ -271,7 +271,7 @@ <argument index="2" name="final_val" type="Variant" /> <argument index="3" name="duration" type="float" /> <description> - Creates and appends a [PropertyTweener]. This method tweens a [code]property[/code] of an [code]object[/code] between an initial value and [code]final_val[/code] in a span of time equal to [code]duration[/code], in seconds. The initial value by default is a value at the time the tweening of the [PropertyTweener] start. For example: + Creates and appends a [PropertyTweener]. This method tweens a [code]property[/code] of an [code]object[/code] between an initial value and [code]final_val[/code] in a span of time equal to [code]duration[/code], in seconds. The initial value by default is the property's value at the time the tweening of the [PropertyTweener] starts. For example: [codeblock] var tween = create_tween() tween.tween_property($Sprite, "position", Vector2(100, 200), 1) @@ -292,19 +292,19 @@ <signal name="finished"> <description> Emitted when the [Tween] has finished all tweening. Never emitted when the [Tween] is set to infinite looping (see [method set_loops]). - [b]Note:[/b] The [Tween] is removed (invalidated) after this signal is emitted, but it doesn't happen immediately, but on the next processing frame. Calling [method stop] inside the signal callback will preserve the [Tween]. + [b]Note:[/b] The [Tween] is removed (invalidated) in the next processing frame after this signal is emitted. Calling [method stop] inside the signal callback will prevent the [Tween] from being removed. </description> </signal> <signal name="loop_finished"> <argument index="0" name="loop_count" type="int" /> <description> - Emitted when a full loop is complete (see [method set_loops]), providing the loop index. This signal is not emitted after final loop, use [signal finished] instead for this case. + Emitted when a full loop is complete (see [method set_loops]), providing the loop index. This signal is not emitted after the final loop, use [signal finished] instead for this case. </description> </signal> <signal name="step_finished"> <argument index="0" name="idx" type="int" /> <description> - Emitted when one step of the [Tween] is complete, providing the step index. One step is either a single [Tweener] or a group of [Tweener]s running parallelly. + Emitted when one step of the [Tween] is complete, providing the step index. One step is either a single [Tweener] or a group of [Tweener]s running in parallel. </description> </signal> </signals> |