arcade-physics/lib/geom/triangle/BuildEquilateral.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 Triangle_1 = __importDefault(require("./Triangle"));
/**
 * Builds an equilateral triangle. In the equilateral triangle, all the sides are the same length (congruent) and all the angles are the same size (congruent).
 * The x/y specifies the top-middle of the triangle (x1/y1) and length is the length of each side.
 *
 * @function Phaser.Geom.Triangle.BuildEquilateral
 * @since 3.0.0
 *
 * @param {number} x - x coordinate of the top point of the triangle.
 * @param {number} y - y coordinate of the top point of the triangle.
 * @param {number} length - Length of each side of the triangle.
 *
 * @return {Phaser.Geom.Triangle} The Triangle object of the given size.
 */
const BuildEquilateral = (x, y, length) => {
    const height = length * (Math.sqrt(3) / 2);
    const x1 = x;
    const y1 = y;
    const x2 = x + length / 2;
    const y2 = y + height;
    const x3 = x - length / 2;
    const y3 = y + height;
    return new Triangle_1.default(x1, y1, x2, y2, x3, y3);
};
exports.default = BuildEquilateral;
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