public List <ProxListPosition> GetNeighbors(
ProxListPosition item
)
{
var x = item.box.X;
var y = item.box.Y;
var result = new List <ProxListPosition>();
var x_mod = 1;
var y_mod = 1;
if (item.Position.X < 0.5f)
{
x_mod = -1;
}
if (item.Position.Y < 0.5f)
{
y_mod = -1;
}
TryAddRange(result, x, y);
TryAddRange(result, x + x_mod, y);
TryAddRange(result, x, y + y_mod);
TryAddRange(result, x + x_mod, y + y_mod);
result.Remove(item);
return(result);
}
public void Remove(ProxListPosition item)
{
if (!_groups[item.box.X, item.box.Y].Remove(item))
{
throw new Exception("Failed to remove given item.");
}
}
internal Point AddToArray(ProxListPosition item, Point2 position)
{
var new_box = GetBox(position);
_groups[new_box.X, new_box.Y].Add(item);
return(new_box);
}
internal Point UpdateBox(ProxListPosition item, Point2 position)
{
var new_box = GetBox(position);
if (new_box == item.box)
{
return(item.box);
}
if (!_groups[item.box.X, item.box.Y].Remove(item))
{
throw new Exception("Error updating position.");
}
_groups[new_box.X, new_box.Y].Add(item);
return(new_box);
}
