public Rectangle TileToScreen(System.Drawing.RectangleF tileRect)
{
return new Rectangle(
(int)((tileRect.X + m_offsetX) * m_tileSize),
(int)((tileRect.Y + m_offsetY) * m_tileSize),
(int)(tileRect.Width * m_tileSize),
(int)(tileRect.Height * m_tileSize));
}