030b7e90bf
* Enable `@typescript-eslint/explicit-member-accessibility` on /src * Prettier * Enable `@typescript-eslint/explicit-function-return-type` in /src * Fix types * tsc strict fixes * Delint * Fix test * Fix bad merge
32 lines
1.1 KiB
TypeScript
32 lines
1.1 KiB
TypeScript
/*
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Copyright 2021 Šimon Brandner <simon.bra.ag@gmail.com>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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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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