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ParseTileLayers.js
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ParseTileLayers.js
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/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2020 Photon Storm Ltd.
* @license {@link https://opensource.org/licenses/MIT|MIT License}
*/
var LayerData = require('../../mapdata/LayerData');
var Tile = require('../../Tile');
/**
* Parses all tilemap layers in an Impact JSON object into new LayerData objects.
*
* @function Phaser.Tilemaps.Parsers.Impact.ParseTileLayers
* @since 3.0.0
*
* @param {object} json - The Impact JSON object.
* @param {boolean} insertNull - Controls how empty tiles, tiles with an index of -1, in the map
* data are handled (see {@link Phaser.Tilemaps.Parsers.Tiled.ParseJSONTiled}).
*
* @return {Phaser.Tilemaps.LayerData[]} - An array of LayerData objects, one for each entry in
* json.layers with the type 'tilelayer'.
*/
var ParseTileLayers = function (json, insertNull)
{
var tileLayers = [];
for (var i = 0; i < json.layer.length; i++)
{
var layer = json.layer[i];
var layerData = new LayerData({
name: layer.name,
width: layer.width,
height: layer.height,
tileWidth: layer.tilesize,
tileHeight: layer.tilesize,
visible: layer.visible === 1
});
var row = [];
var tileGrid = [];
// Loop through the data field in the JSON. This is a 2D array containing the tile indexes,
// one after the other. The indexes are relative to the tileset that contains the tile.
for (var y = 0; y < layer.data.length; y++)
{
for (var x = 0; x < layer.data[y].length; x++)
{
// In Weltmeister, 0 = no tile, but the Tilemap API expects -1 = no tile.
var index = layer.data[y][x] - 1;
var tile;
if (index > -1)
{
tile = new Tile(layerData, index, x, y, layer.tilesize, layer.tilesize);
}
else
{
tile = insertNull
? null
: new Tile(layerData, -1, x, y, layer.tilesize, layer.tilesize);
}
row.push(tile);
}
tileGrid.push(row);
row = [];
}
layerData.data = tileGrid;
tileLayers.push(layerData);
}
return tileLayers;
};
module.exports = ParseTileLayers;