arcade-physics/lib/geom/line/NormalY.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 const_1 = __importDefault(require("../../math/const"));
const Angle_1 = __importDefault(require("./Angle"));
/**
 * The Y value of the normal of the given line.
 * The normal of a line is a vector that points perpendicular from it.
 *
 * @function Phaser.Geom.Line.NormalY
 * @since 3.0.0
 *
 * @param {Phaser.Geom.Line} line - The line to calculate the normal of.
 *
 * @return {number} The Y value of the normal of the Line.
 */
const NormalY = line => {
    return Math.sin((0, Angle_1.default)(line) - const_1.default.TAU);
};
exports.default = NormalY;
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