private void GroupMarkers()
{
List <MarkerGroup> groups = new List <MarkerGroup>();
for (int zoom = OnlineMaps.MAXZOOM; zoom >= 3; zoom--)
{
List <OnlineMapsMarker> ms = markers.Select(m => m).ToList();
for (int j = 0; j < ms.Count - 1; j++)
{
OnlineMapsMarker marker = ms[j];
MarkerGroup group = null;
double px, py;
marker.GetTilePosition(out px, out py);
int k = j + 1;
while (k < ms.Count)
{
OnlineMapsMarker marker2 = ms[k];
double p2x, p2y;
marker2.GetTilePosition(out p2x, out p2y);
if (OnlineMapsUtils.Magnitude(px, py, p2x, p2y) < distance)
{
if (group == null)
{
group = new MarkerGroup(zoom, groupTexture);
groups.Add(group);
group.Add(marker);
if (marker.range.min == 3)
{
marker.range.min = zoom + 1;
}
}
group.Add(marker2);
if (marker2.range.min == 3)
{
marker2.range.min = zoom + 1;
}
ms.RemoveAt(k);
px = group.tilePositionX;
py = group.tilePositionY;
}
else
{
k++;
}
}
}
}
foreach (MarkerGroup g in groups)
{
g.Apply(font);
}
}
private Rect GetMarkerRect(OnlineMapsMarker marker)
{
const int s = OnlineMapsUtils.tileSize;
double tx, ty;
marker.GetTilePosition(out tx, out ty);
tx -= bufferPosition.x;
ty -= bufferPosition.y;
OnlineMapsVector2i ip = marker.GetAlignedPosition((int)(tx * s), (int)(ty * s));
return(new Rect(ip.x, ip.y, marker.width, marker.height));
}