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25 lines
808 B
TypeScript
25 lines
808 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 { clamp } from "lodash";
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/**
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* This method linearly interpolates between two points (start, end). This is
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* most commonly used to find a point some fraction of the way along a line
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* between two endpoints (e.g. to move an object gradually between those
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* points).
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* @param {number} start the starting point
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* @param {number} end the ending point
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* @param {number} amt the interpolant
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* @returns
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*/
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export function lerp(start: number, end: number, amt: number): number {
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amt = clamp(amt, 0, 1);
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return (1 - amt) * start + amt * end;
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}
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