/// <summary>
/// Remove all locations from the collection which overlap locations on the specified section
/// </summary>
/// <param name="locations">The collection to remove overlapping locations from</param>
/// <returns>The removed locations which overlap</returns>
private static List<Location_CanvasViewModel> RemoveOverlappingLocations(List<Location_CanvasViewModel> locations, int section_number)
{
List<Location_CanvasViewModel> listOverlappingLocations = new List<Location_CanvasViewModel>(locations.Count);
for (int i = locations.Count - 1; i >= 0; i--)
{
Location_CanvasViewModel loc = locations.ElementAt(i);
if (loc.TypeCode == LocationType.CIRCLE)
{
GridCircle locCircle = new GridCircle(loc.VolumePosition, loc.OffSectionRadius);
foreach (long linked in loc.Links)
{
LocationObj LinkedObj = Store.Locations.GetObjectByID(linked, false);
if (LinkedObj == null)
continue;
if (LinkedObj.Section == section_number)
{
if (locCircle.Intersects(LinkedObj.VolumePosition, LinkedObj.Radius))
{
listOverlappingLocations.Add(loc);
locations.RemoveAt(i);
break;
}
}
}
}
}
return listOverlappingLocations;
}
private static List<Location_CanvasViewModel> FindVisibleLocations(ICollection<Location_CanvasViewModel> locations, GridRectangle VisibleBounds)
{
GridCircle VisibleCircle = new GridCircle(VisibleBounds.Center, GridVector2.Distance(VisibleBounds.Center, new GridVector2(VisibleBounds.Left, VisibleBounds.Top)));
List<Location_CanvasViewModel> listLocationsToDraw = new List<Location_CanvasViewModel>(locations.Count);
foreach (Location_CanvasViewModel loc in locations)
{
if (loc == null)
continue;
if (!loc.VolumePositionHasBeenCalculated)
continue;
//Find out if we should draw the location
if (loc.TypeCode == LocationType.CIRCLE)
{
if (VisibleCircle.Intersects(loc.VolumePosition, loc.Radius) == false)
continue;
}
else if (loc.TypeCode == LocationType.POINT)
{
if (VisibleBounds.Contains(loc.VolumePosition) == false)
continue;
}
else
{
Debug.Fail("Unknown location type");
}
Structure ParentStructure = loc.Parent;
if (ParentStructure == null)
continue;
if (ParentStructure.Type == null)
continue;
listLocationsToDraw.Add(loc);
}
return listLocationsToDraw;
}
