/// <summary>
/// Tries to arrive nearby without overlapping with other grids.
/// </summary>
public bool TryFTLProximity(ShuttleComponent component, EntityUid targetUid, TransformComponent?xform = null, TransformComponent?targetXform = null)
{
if (!Resolve(targetUid, ref targetXform) || targetXform.MapUid == null || !Resolve(component.Owner, ref xform))
{
return(false);
}
var xformQuery = GetEntityQuery <TransformComponent>();
var shuttleAABB = Comp <IMapGridComponent>(component.Owner).Grid.LocalAABB;
Box2?aabb = null;
// Spawn nearby.
// We essentially expand the Box2 of the target area until nothing else is added then we know it's valid.
// Can't just get an AABB of every grid as we may spawn very far away.
var targetAABB = _transform.GetWorldMatrix(targetXform, xformQuery)
.TransformBox(Comp <IMapGridComponent>(targetUid).Grid.LocalAABB).Enlarged(shuttleAABB.Size.Length);
var nearbyGrids = new HashSet <EntityUid>(1)
{
targetUid
};
var iteration = 0;
var lastCount = 1;
var mapId = targetXform.MapID;
while (iteration < 3)
{
foreach (var grid in _mapManager.FindGridsIntersecting(mapId, targetAABB))
{
if (!nearbyGrids.Add(grid.GridEntityId))
{
continue;
}
targetAABB = targetAABB.Union(_transform.GetWorldMatrix(grid.GridEntityId, xformQuery)
.TransformBox(Comp <IMapGridComponent>(grid.GridEntityId).Grid.LocalAABB));
}
// Can do proximity
if (nearbyGrids.Count == lastCount)
{
break;
}
targetAABB = targetAABB.Enlarged(shuttleAABB.Size.Length / 2f);
iteration++;
lastCount = nearbyGrids.Count;
// Mishap moment, dense asteroid field or whatever
if (iteration != 3)
{
continue;
}
foreach (var grid in _mapManager.GetAllGrids())
{
// Don't add anymore as it is irrelevant, but that doesn't mean we need to re-do existing work.
if (nearbyGrids.Contains(grid.GridEntityId))
{
continue;
}
targetAABB = targetAABB.Union(_transform.GetWorldMatrix(grid.GridEntityId, xformQuery)
.TransformBox(Comp <IMapGridComponent>(grid.GridEntityId).Grid.LocalAABB));
}
break;
}
var minRadius = (MathF.Max(targetAABB.Width, targetAABB.Height) + MathF.Max(shuttleAABB.Width, shuttleAABB.Height)) / 2f;
var spawnPos = targetAABB.Center + _random.NextVector2(minRadius, minRadius + 64f);
if (TryComp <PhysicsComponent>(component.Owner, out var shuttleBody))
{
shuttleBody.LinearVelocity = Vector2.Zero;
shuttleBody.AngularVelocity = 0f;
}
xform.Coordinates = new EntityCoordinates(targetXform.MapUid.Value, spawnPos);
xform.WorldRotation = _random.NextAngle();
return(true);
}
