arcade-physics/lib/geom/point/SetMagnitude.js

Use Arcade Physics without Phaser.

"use strict";
/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2020 Photon Storm Ltd.
 * @license      {@link https://opensource.org/licenses/MIT|MIT License}
 */
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const GetMagnitude_1 = __importDefault(require("./GetMagnitude"));
/**
 * Changes the magnitude (length) of a two-dimensional vector without changing its direction.
 *
 * @function Phaser.Geom.Point.SetMagnitude
 * @since 3.0.0
 *
 * @generic {Phaser.Geom.Point} O - [point,$return]
 *
 * @param {Phaser.Geom.Point} point - The Point to treat as the end point of the vector.
 * @param {number} magnitude - The new magnitude of the vector.
 *
 * @return {Phaser.Geom.Point} The modified Point.
 */
const SetMagnitude = (point, magnitude) => {
    if (point.x !== 0 || point.y !== 0) {
        const m = (0, GetMagnitude_1.default)(point);
        point.x /= m;
        point.y /= m;
    }
    point.x *= magnitude;
    point.y *= magnitude;
    return point;
};
exports.default = SetMagnitude;
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