/// <summary>
/// Draws all locations in "extraLocations" on Bitmap tile with box
/// containing the start and end point of the tile in geological coordinates.
/// Locations will only be drawn in certain zoomlevels.
/// </summary>
private void drawExtras(BBox box, Bitmap tile, Location[] extraLocations, int zoomLevel)
{
foreach (Location extraLocation in extraLocations)
{
Image icon = getIconFromLocationType(extraLocation.Type, zoomLevel);
if (icon != null)
{
drawExtra(box, tile, extraLocation, icon);
}
}
}
/// <summary>
/// Draws a location on the map with Image "icon" on
/// the Bitmap "tile", where box represents the position
/// and size of the tile in geological coordinates.
/// </summary>
private void drawExtra(BBox box, Bitmap tile, Location location, Image icon)
{
Graphics gr = Graphics.FromImage(tile);
gr.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
Point start = nodeToTilePoint(box, tile, new Node(box.XMin, box.YMax, 0));
Point p = nodeToTilePoint(box, tile, location);
gr.DrawImage(icon, new Point(p.X - start.X, -p.Y + start.Y));
}
