/// <summary>
/// Try to find the closest entity from whitelist on a current map
/// Will return null if can't find anything
/// </summary>
private EntityUid?FindTargetFromComponent(EntityUid uid, Type whitelist, TransformComponent?transform = null)
{
var xformQuery = GetEntityQuery <TransformComponent>();
if (transform == null)
{
xformQuery.TryGetComponent(uid, out transform);
}
if (transform == null)
{
return(null);
}
// sort all entities in distance increasing order
var mapId = transform.MapID;
var l = new SortedList <float, EntityUid>();
var worldPos = _transform.GetWorldPosition(transform, xformQuery);
foreach (var comp in EntityManager.GetAllComponents(whitelist))
{
if (!xformQuery.TryGetComponent(comp.Owner, out var compXform) ||
compXform.MapID != mapId)
{
continue;
}
var dist = (_transform.GetWorldPosition(compXform, xformQuery) - worldPos).LengthSquared;
l.TryAdd(dist, comp.Owner);
}
// return uid with a smallest distacne
return(l.Count > 0 ? l.First().Value : null);
}
private Dictionary <EntityUid, HashSet <Vector2i> > GetChunksForViewers(
HashSet <EntityUid> viewers,
int chunkSize,
ObjectPool <HashSet <Vector2i> > indexPool,
ObjectPool <Dictionary <EntityUid, HashSet <Vector2i> > > viewerPool,
float viewEnlargement,
EntityQuery <TransformComponent> xformQuery)
{
Dictionary <EntityUid, HashSet <Vector2i> > chunks = viewerPool.Get();
DebugTools.Assert(chunks.Count == 0);
foreach (var viewerUid in viewers)
{
var xform = xformQuery.GetComponent(viewerUid);
var pos = _transform.GetWorldPosition(xform, xformQuery);
var bounds = _baseViewBounds.Translated(pos).Enlarged(viewEnlargement);
foreach (var grid in _mapManager.FindGridsIntersecting(xform.MapID, bounds, true))
{
if (!chunks.TryGetValue(grid.GridEntityId, out var set))
{
chunks[grid.GridEntityId] = set = indexPool.Get();
DebugTools.Assert(set.Count == 0);
}
var enumerator = new ChunkIndicesEnumerator(_transform.GetInvWorldMatrix(grid.GridEntityId, xformQuery).TransformBox(bounds), chunkSize);
while (enumerator.MoveNext(out var indices))
{
set.Add(indices.Value);
}
}
}
return(chunks);
}
