2020-04-10 18:40:52 +00:00
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/**
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* @author Seth Berrier <berriers@uwstout.edu>
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* @copyright 2020 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 GetFastValue = require('../../../utils/object/GetFastValue');
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/**
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* Parse a Tiled group layer and create a state object for inheriting.
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*
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* @function Phaser.Tilemaps.Parsers.Tiled.CreateGroupLayer
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* @since 3.21.0
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*
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* @param {object} json - The Tiled JSON object.
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* @param {object} [currentl] - The current group layer from the Tiled JSON file.
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* @param {object} [parentstate] - The state of the parent group (if any).
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*
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* @return {object} A group state object with proper values for updating children layers.
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*/
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var CreateGroupLayer = function (json, groupl, parentstate)
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{
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if (!groupl)
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{
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// Return a default group state object
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return {
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i: 0, // Current layer array iterator
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layers: json.layers, // Current array of layers
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// Values inherited from parent group
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name: '',
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opacity: 1,
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visible: true,
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x: 0,
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y: 0
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};
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}
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// Compute group layer x, y
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var layerX = groupl.x + GetFastValue(groupl, 'startx', 0) * json.tilewidth + GetFastValue(groupl, 'offsetx', 0);
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var layerY = groupl.y + GetFastValue(groupl, 'starty', 0) * json.tileheight + GetFastValue(groupl, 'offsety', 0);
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// Compute next state inherited from group
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return {
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i: 0,
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layers: groupl.layers,
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name: parentstate.name + groupl.name + '/',
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opacity: parentstate.opacity * groupl.opacity,
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visible: parentstate.visible && groupl.visible,
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x: parentstate.x + layerX,
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y: parentstate.y + layerY
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};
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};
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module.exports = CreateGroupLayer;
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