mirror of
https://github.com/photonstorm/phaser
synced 2024-12-23 11:33:28 +00:00
61 lines
2.5 KiB
JavaScript
61 lines
2.5 KiB
JavaScript
/**
|
|
* @author Richard Davey <rich@photonstorm.com>
|
|
* @copyright 2020 Photon Storm Ltd.
|
|
* @license {@link https://opensource.org/licenses/MIT|MIT License}
|
|
*/
|
|
|
|
var Vector2 = require('../../math/Vector2');
|
|
|
|
/**
|
|
* Converts from world XY coordinates (pixels) to isometric tile XY coordinates (tile units), factoring in the
|
|
* layer's position, scale and scroll. This will return a new Vector2 object or update the given
|
|
* `point` object.
|
|
*
|
|
* @function Phaser.Tilemaps.Components.IsometricWorldToTileXY
|
|
* @since 3.50.0
|
|
*
|
|
* @param {number} worldX - The x coordinate to be converted, in pixels, not tiles.
|
|
* @param {number} worldY - The y coordinate to be converted, in pixels, not tiles.
|
|
* @param {boolean} snapToFloor - Whether or not to round the tile coordinate down to the nearest integer.
|
|
* @param {Phaser.Math.Vector2} point - A Vector2 to store the coordinates in. If not given a new Vector2 is created.
|
|
* @param {Phaser.Cameras.Scene2D.Camera} camera - The Camera to use when calculating the tile index from the world values.
|
|
* @param {Phaser.Tilemaps.LayerData} layer - The Tilemap Layer to act upon.
|
|
*
|
|
* @return {Phaser.Math.Vector2} The XY location in tile units.
|
|
*/
|
|
var IsometricWorldToTileXY = function (worldX, worldY, snapToFloor, point, camera, layer)
|
|
{
|
|
if (!point) { point = new Vector2(); }
|
|
|
|
var tileWidth = layer.baseTileWidth;
|
|
var tileHeight = layer.baseTileHeight;
|
|
var tilemapLayer = layer.tilemapLayer;
|
|
|
|
if (tilemapLayer)
|
|
{
|
|
if (!camera) { 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 vertical scroll
|
|
|
|
worldY = worldY - (tilemapLayer.y + camera.scrollY * (1 - tilemapLayer.scrollFactorY));
|
|
|
|
tileHeight *= tilemapLayer.scaleY;
|
|
|
|
// Find the world position relative to the static or dynamic layer's top left origin,
|
|
// factoring in the camera's horizontal scroll
|
|
|
|
worldX = worldX - (tilemapLayer.x + camera.scrollX * (1 - tilemapLayer.scrollFactorX));
|
|
|
|
tileWidth *= tilemapLayer.scaleX;
|
|
}
|
|
|
|
worldX -= tileWidth / 2;
|
|
|
|
var x = (snapToFloor) ? Math.floor((worldX / (tileWidth / 2) + worldY / (tileHeight / 2)) / 2) : ((worldX / (tileWidth / 2) + worldY / (tileHeight / 2)) / 2);
|
|
var y = (snapToFloor) ? Math.floor((worldY / (tileHeight / 2) - worldX / (tileWidth / 2)) / 2) : ((worldY / (tileHeight / 2) - worldX / (tileWidth / 2)) / 2);
|
|
|
|
return point.set(x, y);
|
|
};
|
|
|
|
module.exports = IsometricWorldToTileXY;
|