/// <summary>
/// Inserts an entity at a spot on the terrain. Used by Add and Move.
/// </summary>
/// <param name="toInsert">The entity to insert</param>
/// <param name="location">The location to insert at</param>
/// <param name="removeOldInstance">True if Insert should delete an existing occurrence of toInsert in the terrain</param>
void Insert(SingleEntity toInsert, Vector location, bool removeOldInstance)
{
try
{
if (location.X < 0 || location.Y < 0 || location.X > Size.X || location.Y > Size.Y)
{
return;
}
TerrainSpot oldSpot;
TerrainSpot newSpot;
if (Field.TryGetValue(location, out newSpot))
{
bool allowed = true;
foreach (var o in newSpot.Occupants)
{
var callee = o.CollideWith(new CollisionEventArgs(toInsert, location));
var caller = toInsert.CollideWith(new CollisionEventArgs(o, location));
allowed = !callee && !caller;
if (!allowed)
{
break;
}
}
if (allowed)
{
if (removeOldInstance)
{
Field.TryGetValue(toInsert.Position, out oldSpot);
oldSpot.Occupants.Remove(toInsert);
if (oldSpot.Occupants.Count == 0)
{
Field.Remove(toInsert.Position);
}
}
toInsert.Position = location;
newSpot.Occupants.Add(toInsert);
}
}
else
{
if (removeOldInstance)
{
Field.TryGetValue(toInsert.Position, out oldSpot);
oldSpot.Occupants.Remove(toInsert);
if (oldSpot.Occupants.Count == 0)
{
Field.Remove(toInsert.Position);
}
}
toInsert.Position = location;
Field.Add(location, new TerrainSpot(toInsert));
}
toInsert.ParentScene = ParentScene;
}
catch (Exception)
{
}
}
public TerrainSpot(SingleEntity first)
{
Occupants = new List <SingleEntity>();
Occupants.Add(first);
}
