public override bool ShouldCull(Position position, Distance distance)
{
if (Bounds == null)
{
return(true);
}
return(MapLocationSystem.CalculateDistance(position, Bounds.Center) <= distance);
}
public override bool ShouldCull(Position position, Distance distance)
{
if (Positions == null || Positions.Count == 0)
{
return(true);
}
return(Positions.All(x =>
MapLocationSystem.CalculateDistance(position, x) > distance));
}
internal override Position?GetRelativePosition(Position reference)
{
if (Positions == null || Positions.Count == 0)
{
return(null);
}
return(Positions
.OrderBy(x => MapLocationSystem.CalculateDistance(reference, x))
.First());
}
internal override Position?GetRelativePosition(Position reference)
{
return(new Position[]
{
Bounds.NorthEast,
Bounds.NorthWest,
Bounds.SouthEast,
Bounds.SouthWest,
Bounds.Center
}
.OrderBy(x => MapLocationSystem.CalculateDistance(reference, x))
.First());
}
public override void UpdateMapRegion(MapRegion region)
{
base.UpdateMapRegion(region);
Region = region;
if (region == null)
{
return;
}
if (!IsVisible)
{
return;
}
Center = region.GetCenter();
if (lastCullCenter.HasValue && CullUpdateThreshold.Meters > 0 &&
MapLocationSystem.CalculateDistance(Center, lastCullCenter.Value) < CullUpdateThreshold)
{
return;
}
if (MaxRunningTasks.HasValue && activeTasksCount >= MaxRunningTasks)
{
Push();
return;
}
if (lastQueryCenter.HasValue && QueryThreshold.Meters > 0 &&
MapLocationSystem.CalculateDistance(Center, lastQueryCenter.Value) < QueryThreshold)
{
Push();
return;
}
lastQueryCenter = Center;
Task.Run(DoAsync);
}