- orientation = `orthogonal`

  - TileToWorldX

    ```javascript
    var TileToWorldX = function(tileX, tileY) {
        return tileX * tile.width;
    }
    ```
  - TileToWorldY

    ```javascript
    var TileToWorldY = function(tileX, tileY) {
        return tileY * tile.height;
    }
    ```
  - WorldToTileX
    ```javascript
    var WorldToTileX = function(worldX, worldY) {
        return Math.floor( worldX / tile.width );
    }
    ```
  - WorldToTileY
    ```javascript
    var WorldToTileY = function(worldX, worldY) {
        return Math.floor( worldY / tile.height );
    }
    ```

- orientation  = `isometric`
  - TileToWorldX

    ```javascript
    var TileToWorldX = function(tileX, tileY) {
        return (tileX - tileY) * (tile.width * 0.5);
    }
    ```
  - TileToWorldY

    ```javascript
    var TileToWorldY = function(tileX, tileY) {
        return (tileX + tileY) * (tile.height * 0.5);
    }
    ```
  - WorldToTileX
    ```javascript
    var WorldToTileX = function(worldX, worldY) {
        return 0.5 * (
            Math.floor(worldY / (tile.height * 0.5)) +
            Math.floor(worldX / (tile.width * 0.5))
        );
    }
    ```
  - WorldToTileY
    ```javascript
    var WorldToTileY = function(worldX, worldY) {
        return 0.5 * (
            Math.floor(worldY / (tile.height * 0.5)) -
            Math.floor(worldX / (tile.width * 0.5))
        );
    }
    ```