arcade-physics/lib/geom/rectangle/PerimeterPoint.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 Point_1 = __importDefault(require("../point/Point"));
const DegToRad_1 = __importDefault(require("../../math/DegToRad"));
/**
 * Returns a Point from the perimeter of a Rectangle based on the given angle.
 *
 * @function Phaser.Geom.Rectangle.PerimeterPoint
 * @since 3.0.0
 *
 * @generic {Phaser.Geom.Point} O - [out,$return]
 *
 * @param {Phaser.Geom.Rectangle} rectangle - The Rectangle to get the perimeter point from.
 * @param {number} angle - The angle of the point, in degrees.
 * @param {Phaser.Geom.Point} [out] - The Point object to store the position in. If not given, a new Point instance is created.
 *
 * @return {Phaser.Geom.Point} A Point object holding the coordinates of the Rectangle perimeter.
 */
const PerimeterPoint = (rectangle, angle, out) => {
    if (out === undefined) {
        out = new Point_1.default();
    }
    angle = (0, DegToRad_1.default)(angle);
    const s = Math.sin(angle);
    const c = Math.cos(angle);
    let dx = c > 0 ? rectangle.width / 2 : rectangle.width / -2;
    let dy = s > 0 ? rectangle.height / 2 : rectangle.height / -2;
    if (Math.abs(dx * s) < Math.abs(dy * c)) {
        dy = (dx * s) / c;
    }
    else {
        dx = (dy * c) / s;
    }
    out.x = dx + rectangle.centerX;
    out.y = dy + rectangle.centerY;
    return out;
};
exports.default = PerimeterPoint;
//# sourceMappingURL=PerimeterPoint.js.map