arcade-physics/lib/math/ToXY.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 Vector2_1 = __importDefault(require("./Vector2"));
/**
 * Returns a Vector2 containing the x and y position of the given index in a `width` x `height` sized grid.
 *
 * For example, in a 6 x 4 grid, index 16 would equal x: 4 y: 2.
 *
 * If the given index is out of range an empty Vector2 is returned.
 *
 * @function Phaser.Math.ToXY
 * @since 3.19.0
 *
 * @param {number} index - The position within the grid to get the x/y value for.
 * @param {number} width - The width of the grid.
 * @param {number} height - The height of the grid.
 * @param {Phaser.Math.Vector2} [out] - An optional Vector2 to store the result in. If not given, a new Vector2 instance will be created.
 *
 * @return {Phaser.Math.Vector2} A Vector2 where the x and y properties contain the given grid index.
 */
const ToXY = (index, width, height, out) => {
    if (out === undefined) {
        out = new Vector2_1.default();
    }
    let x = 0;
    let y = 0;
    const total = width * height;
    if (index > 0 && index <= total) {
        if (index > width - 1) {
            y = Math.floor(index / width);
            x = index - y * width;
        }
        else {
            x = index;
        }
    }
    return out.set(x, y);
};
exports.default = ToXY;
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