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28 lines
799 B
TypeScript
28 lines
799 B
TypeScript
/*
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Copyright 2024 New Vector Ltd.
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Copyright 2021 Šimon Brandner <simon.bra.ag@gmail.com>
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SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
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Please see LICENSE files in the repository root for full details.
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*/
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import { lerp } from "../../../src/utils/AnimationUtils";
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describe("lerp", () => {
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it("correctly interpolates", () => {
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expect(lerp(0, 100, 0.5)).toBe(50);
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expect(lerp(50, 100, 0.5)).toBe(75);
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expect(lerp(0, 1, 0.1)).toBe(0.1);
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});
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it("clamps the interpolant", () => {
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expect(lerp(0, 100, 50)).toBe(100);
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expect(lerp(0, 100, -50)).toBe(0);
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});
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it("handles negative numbers", () => {
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expect(lerp(-100, 0, 0.5)).toBe(-50);
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expect(lerp(100, -100, 0.5)).toBe(0);
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});
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});
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