Tilemaps.Components.IsometricTileToWorldXY is a new function that converts isometric tile coordinates to world coordinates.

src/tilemaps/components/IsometricTileToWorldXY.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 Vector2 = require('../../math/Vector2');
+
+/**
+ * Converts from isometric tile XY coordinates (tile units) to world XY coordinates (pixels), 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.IsometricTileToWorldXY
+ * @since 3.50.0
+ *
+ * @param {integer} tileX - The x coordinate, in tiles, not pixels.
+ * @param {integer} tileY - The y coordinate, in tiles, not pixels.
+ * @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=main 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 world coordinates.
+ */
+var IsometricTileToWorldXY = function (tileX, tileY, point, camera, layer)
+{
+    if (point === undefined) { point = new Vector2(); }
+
+    var tileWidth = layer.baseTileWidth;
+    var tileHeight = layer.baseTileHeight;
+    var tilemapLayer = layer.tilemapLayer;
+
+    var layerWorldX = 0;
+    var layerWorldY = 0;
+
+    if (tilemapLayer)
+    {
+        if (camera === undefined) { camera = tilemapLayer.scene.cameras.main; }
+
+        layerWorldX = tilemapLayer.x + camera.scrollX * (1 - tilemapLayer.scrollFactorX);
+
+        tileWidth *= tilemapLayer.scaleX;
+
+        layerWorldY = (tilemapLayer.y + camera.scrollY * (1 - tilemapLayer.scrollFactorY));
+
+        tileHeight *= tilemapLayer.scaleY;
+    }
+
+    var x = layerWorldX + (tileX - tileY) * (tileWidth / 2);
+    var y = layerWorldY + (tileX + tileY) * (tileHeight / 2);
+
+    return point.set(x, y);
+};
+
+module.exports = IsometricTileToWorldXY;