phaser
Version:
A fast, free and fun HTML5 Game Framework for Desktop and Mobile web browsers from the team at Phaser Studio Inc.
55 lines (49 loc) • 1.78 kB
JavaScript
/**
* @author Seth Berrier <berriers@uwstout.edu>
* @copyright 2013-2025 Phaser Studio Inc.
* @license {@link https://opensource.org/licenses/MIT|MIT License}
*/
var GetFastValue = require('../../../utils/object/GetFastValue');
/**
* Parse a Tiled group layer and create a state object for inheriting.
*
* @function Phaser.Tilemaps.Parsers.Tiled.CreateGroupLayer
* @since 3.21.0
*
* @param {object} json - The Tiled JSON object.
* @param {object} [group] - The current group layer from the Tiled JSON file.
* @param {object} [parentState] - The state of the parent group (if any).
*
* @return {object} A group state object with proper values for updating children layers.
*/
var CreateGroupLayer = function (json, group, parentState)
{
if (!group)
{
// Return a default group state object
return {
i: 0, // Current layer array iterator
layers: json.layers, // Current array of layers
// Values inherited from parent group
name: '',
opacity: 1,
visible: true,
x: 0,
y: 0
};
}
// Compute group layer x, y
var layerX = group.x + GetFastValue(group, 'startx', 0) * json.tilewidth + GetFastValue(group, 'offsetx', 0);
var layerY = group.y + GetFastValue(group, 'starty', 0) * json.tileheight + GetFastValue(group, 'offsety', 0);
// Compute next state inherited from group
return {
i: 0,
layers: group.layers,
name: parentState.name + group.name + '/',
opacity: parentState.opacity * group.opacity,
visible: parentState.visible && group.visible,
x: parentState.x + layerX,
y: parentState.y + layerY
};
};
module.exports = CreateGroupLayer;