arcade-physics/lib/geom/rectangle/Intersection.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 Rectangle_1 = __importDefault(require("./Rectangle"));
const RectangleToRectangle_1 = __importDefault(require("../intersects/RectangleToRectangle"));
/**
 * Takes two Rectangles and first checks to see if they intersect.
 * If they intersect it will return the area of intersection in the `out` Rectangle.
 * If they do not intersect, the `out` Rectangle will have a width and height of zero.
 *
 * @function Phaser.Geom.Rectangle.Intersection
 * @since 3.11.0
 *
 * @generic {Phaser.Geom.Rectangle} O - [rect,$return]
 *
 * @param {Phaser.Geom.Rectangle} rectA - The first Rectangle to get the intersection from.
 * @param {Phaser.Geom.Rectangle} rectB - The second Rectangle to get the intersection from.
 * @param {Phaser.Geom.Rectangle} [out] - A Rectangle to store the intersection results in.
 *
 * @return {Phaser.Geom.Rectangle} The intersection result. If the width and height are zero, no intersection occurred.
 */
const Intersection = (rectA, rectB, out) => {
    if (out === undefined) {
        out = new Rectangle_1.default();
    }
    if ((0, RectangleToRectangle_1.default)(rectA, rectB)) {
        out.x = Math.max(rectA.x, rectB.x);
        out.y = Math.max(rectA.y, rectB.y);
        out.width = Math.min(rectA.right, rectB.right) - out.x;
        out.height = Math.min(rectA.bottom, rectB.bottom) - out.y;
    }
    else {
        out.setEmpty();
    }
    return out;
};
exports.default = Intersection;
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