FTilemap.getTileAt C# (CSharp) Method

    public FSprite getTileAt(float givenX, float givenY)
    {
        if (!_skipZero) {
            int node = (int)((_tilesWide % Mathf.Floor(givenX / _tileWidth)) + Mathf.Floor(givenY / _tileHeight) * _tilesWide);

            if (node < _tilesWide * _tilesHigh) {
                return _childNodes[node] as FSprite;
            } else {
                Debug.Log ("FTilemap: index [" + node + "] outside of range: " + (_tilesWide * _tilesHigh));
                return null;
            }
        } else {
            float checkX = Mathf.Floor(givenX / _tileWidth);
            float checkY = Mathf.Floor(givenY / _tileHeight);

            // loop through the available sprites
            foreach (FNode sprite in _childNodes) {

                float compareX = Mathf.Floor((sprite.x - _tileWidth/2) / (float)_tileWidth);
                float compareY = -Mathf.Floor((sprite.y + _tileHeight/2) / (float)_tileHeight);

                if (checkX == compareX && checkY == compareY) {
                    return sprite as FSprite;
                }
            }

            Debug.Log ("FTilemap: index [" + checkX + ", " + checkY + "] not found.");
            return null;
        }
    }