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https://github.com/photonstorm/phaser
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52 lines
2 KiB
JavaScript
52 lines
2 KiB
JavaScript
/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2022 Photon Storm Ltd.
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* @license {@link https://opensource.org/licenses/MIT|MIT License}
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*/
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var GetTilesWithin = require('./GetTilesWithin');
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var GetRandom = require('../../utils/array/GetRandom');
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/**
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* Randomizes the indexes of a rectangular region of tiles (in tile coordinates) within the
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* specified layer. Each tile will receive a new index. If an array of indexes is passed in, then
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* those will be used for randomly assigning new tile indexes. If an array is not provided, the
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* indexes found within the region (excluding -1) will be used for randomly assigning new tile
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* indexes. This method only modifies tile indexes and does not change collision information.
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*
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* @function Phaser.Tilemaps.Components.Randomize
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* @since 3.0.0
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*
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* @param {number} tileX - The left most tile index (in tile coordinates) to use as the origin of the area.
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* @param {number} tileY - The top most tile index (in tile coordinates) to use as the origin of the area.
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* @param {number} width - How many tiles wide from the `tileX` index the area will be.
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* @param {number} height - How many tiles tall from the `tileY` index the area will be.
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* @param {number[]} indexes - An array of indexes to randomly draw from during randomization.
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* @param {Phaser.Tilemaps.LayerData} layer - The Tilemap Layer to act upon.
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*/
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var Randomize = function (tileX, tileY, width, height, indexes, layer)
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{
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var i;
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var tiles = GetTilesWithin(tileX, tileY, width, height, {}, layer);
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// If no indices are given, then find all the unique indexes within the specified region
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if (!indexes)
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{
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indexes = [];
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for (i = 0; i < tiles.length; i++)
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{
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if (indexes.indexOf(tiles[i].index) === -1)
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{
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indexes.push(tiles[i].index);
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}
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}
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}
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for (i = 0; i < tiles.length; i++)
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{
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tiles[i].index = GetRandom(indexes);
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}
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};
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module.exports = Randomize;
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