38 lines
1.1 KiB
TypeScript
38 lines
1.1 KiB
TypeScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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*/
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/**
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* This class implements common easing functions. The math is pretty obscure,
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* but this cool website has nice visual illustrations of what they represent:
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* http://xaedes.de/dev/transitions/
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*/
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export type EasingFunction = (value: number) => number;
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export interface EasingStatic {
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step0: EasingFunction;
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step1: EasingFunction;
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linear: EasingFunction;
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ease: EasingFunction;
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quad: EasingFunction;
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cubic: EasingFunction;
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poly(n: number): EasingFunction;
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sin: EasingFunction;
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circle: EasingFunction;
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exp: EasingFunction;
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elastic(bounciness: number): EasingFunction;
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back(s: number): EasingFunction;
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bounce: EasingFunction;
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bezier(x1: number, y1: number, x2: number, y2: number): EasingFunction;
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in(easing: EasingFunction): EasingFunction;
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out(easing: EasingFunction): EasingFunction;
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inOut(easing: EasingFunction): EasingFunction;
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}
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export type Easing = EasingStatic;
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export const Easing: EasingStatic;
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