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Improve the documentation for ease() and smoothstep()

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This adds a cheatsheet for `ease()` and a comparison graph for
`smoothstep()`, among other things.

(cherry picked from commit 567b6436c9)
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Hugo Locurcio 2021-09-20 16:01:33 +02:00 committed by Rémi Verschelde
parent 642addcc99
commit bb1e434d7c
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1 changed files with 14 additions and 1 deletions
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15
modules/gdscript/doc_classes/@GDScript.xml
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@ -252,7 +252,18 @@
<argument index="0" name="s" type="float" />
<argument index="1" name="curve" type="float" />
<description>
Easing function, based on exponent. The curve values are: 0 is constant, 1 is linear, 0 to 1 is ease-in, 1+ is ease out. Negative values are in-out/out in.
Returns an "eased" value of [code]x[/code] based on an easing function defined with [code]curve[/code]. This easing function is based on an exponent. The [code]curve[/code] can be any floating-point number, with specific values leading to the following behaviors:
[codeblock]
- Lower than -1.0 (exclusive): Ease in-out
- 1.0: Linear
- Between -1.0 and 0.0 (exclusive): Ease out-in
- 0.0: Constant
- Between 0.0 to 1.0 (exclusive): Ease in
- 1.0: Linear
- Greater than 1.0 (exclusive): Ease out
[/codeblock]
[url=https://raw.githubusercontent.com/godotengine/godot-docs/3.3/img/ease_cheatsheet.png]ease() curve values cheatsheet[/url]
See also [method smoothstep]. If you need to perform more advanced transitions, use [Tween] or [AnimationPlayer].
</description>
</method>
<method name="exp">
@ -922,6 +933,8 @@
smoothstep(0, 2, 1.0) # Returns 0.5
smoothstep(0, 2, 2.0) # Returns 1.0
[/codeblock]
Compared to [method ease] with a curve value of [code]-1.6521[/code], [method smoothstep] returns the smoothest possible curve with no sudden changes in the derivative. If you need to perform more advanced transitions, use [Tween] or [AnimationPlayer].
[url=https://raw.githubusercontent.com/godotengine/godot-docs/3.3/img/smoothstep_ease_comparison.png]Comparison between smoothstep() and ease(x, -1.6521) return values[/url]
</description>
</method>
<method name="sqrt">