phaser/src/tilemaps/components/SwapByIndex.js

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/**
* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2019 Photon Storm Ltd.
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* @license {@link https://opensource.org/licenses/MIT|MIT License}
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*/
var GetTilesWithin = require('./GetTilesWithin');
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/**
* Scans the given rectangular area (given in tile coordinates) for tiles with an index matching
* `indexA` and swaps then with `indexB`. This only modifies the index and does not change collision
* information.
*
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* @function Phaser.Tilemaps.Components.SwapByIndex
* @private
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* @since 3.0.0
*
* @param {integer} tileA - First tile index.
* @param {integer} tileB - Second tile index.
* @param {integer} [tileX=0] - The left most tile index (in tile coordinates) to use as the origin of the area.
* @param {integer} [tileY=0] - The top most tile index (in tile coordinates) to use as the origin of the area.
* @param {integer} [width=max width based on tileX] - How many tiles wide from the `tileX` index the area will be.
* @param {integer} [height=max height based on tileY] - How many tiles tall from the `tileY` index the area will be.
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* @param {Phaser.Tilemaps.LayerData} layer - The Tilemap Layer to act upon.
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*/
var SwapByIndex = function (indexA, indexB, tileX, tileY, width, height, layer)
{
var tiles = GetTilesWithin(tileX, tileY, width, height, null, layer);
for (var i = 0; i < tiles.length; i++)
{
if (tiles[i])
{
if (tiles[i].index === indexA)
{
tiles[i].index = indexB;
}
else if (tiles[i].index === indexB)
{
tiles[i].index = indexA;
}
}
}
};
module.exports = SwapByIndex;