2017-11-27 13:33:30 +00:00
|
|
|
/**
|
|
|
|
* Converts from world X coordinates (pixels) to tile X coordinates (tile units), factoring in the
|
|
|
|
* layer's position, scale and scroll.
|
|
|
|
*
|
|
|
|
* @param {number} worldX - [description]
|
|
|
|
* @param {boolean} [snapToFloor=true] - Whether or not to round the tile coordinate down to the
|
|
|
|
* nearest integer.
|
|
|
|
* @param {Camera} [camera=main camera] - [description]
|
|
|
|
* @param {LayerData} layer - [description]
|
|
|
|
* @returns {number} The X location in tile units.
|
|
|
|
*/
|
2017-11-25 13:08:06 +00:00
|
|
|
var WorldToTileX = function (worldX, snapToFloor, camera, layer)
|
2017-11-17 02:36:45 +00:00
|
|
|
{
|
2017-11-25 13:08:06 +00:00
|
|
|
if (snapToFloor === undefined) { snapToFloor = true; }
|
|
|
|
|
2017-11-25 23:12:24 +00:00
|
|
|
var tileWidth = layer.tileWidth;
|
2017-11-17 02:36:45 +00:00
|
|
|
var tilemapLayer = layer.tilemapLayer;
|
2017-11-25 23:12:24 +00:00
|
|
|
|
2017-11-17 02:36:45 +00:00
|
|
|
if (tilemapLayer)
|
|
|
|
{
|
|
|
|
if (camera === undefined) { camera = tilemapLayer.scene.cameras.main; }
|
|
|
|
|
|
|
|
// Find the world position relative to the static or dynamic layer's top left origin,
|
|
|
|
// factoring in the camera's horizontal scroll
|
|
|
|
worldX = worldX + (camera.scrollX * tilemapLayer.scrollFactorX) - tilemapLayer.x;
|
2017-11-25 23:12:24 +00:00
|
|
|
|
|
|
|
tileWidth *= tilemapLayer.scaleX;
|
2017-11-17 02:36:45 +00:00
|
|
|
}
|
|
|
|
|
2017-11-25 13:08:06 +00:00
|
|
|
return snapToFloor
|
2017-11-25 23:12:24 +00:00
|
|
|
? Math.floor(worldX / tileWidth)
|
|
|
|
: worldX / tileWidth;
|
2017-11-17 02:36:45 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
module.exports = WorldToTileX;
|