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37 lines
1.1 KiB
Markdown
37 lines
1.1 KiB
Markdown
# Animation API
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## spring()
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Returns a new source with a dynamically animated value of the input source.
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- **Type**
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```lua
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function spring<T>(
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source: () -> T & Animatable,
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period: number = 1,
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damping_ratio: number = 1
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): () -> T
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type Animatable = number | CFrame | Color3 | UDim | UDim2 | Vector2 | Vector3
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```
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- **Details**
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The output source value is updated every frame based on the input source
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value.
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The output is physically simulated according to a
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[spring](https://en.wikipedia.org/wiki/Simple_harmonic_motion).
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`period` is the amount of time in seconds it takes for the spring to
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complete one full oscillation.
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`damping_ratio` is the amount of resistance applied to the spring.
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- \>1 = Overdamped - slowly reaches target without any overshoot.
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- 1 = Critically damped - reaches target without any overshoot.
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- <1 = Underdamped - reaches target with some overshoot.
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- 0 = Undamped - never stabilizes, oscillates forever.
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Velocity is conserved between source updates for smooth animation.
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