/// <summary>
/// Function to find a path between a starting position and a grid entity
/// </summary>
/// <param name="startPos">starting position</param>
/// <param name="entity">target entity</param>
/// <returns>Queue containing the nodes an entity shall traverse</returns>
public Queue <IPath> FindPath(Vector3 startPos, IGridEntity entity)
{
var cels = entity.OccupyingCels;
List <IPath> neighbours = new List <IPath>();
foreach (IPath cel in cels)
{
neighbours.AddRange(GetNeighbours(cel));
}
float distance = Mathf.Infinity;
Vector3 targetPos = Vector3.zero;
foreach (var neighbour in neighbours)
{
// TODO: Consider neighbour state
// if (neighbour.celState != IPathState.Walkable)
// continue;
if (Vector3.Distance(neighbour.WorldPos, startPos) < distance)
{
distance = Vector3.Distance(neighbour.WorldPos, startPos);
targetPos = neighbour.WorldPos;
}
}
return(FindPath(startPos, targetPos));
}
static IEnumerable <Transform> LazyGetChildren(Transform parent)
{
foreach (Transform child in parent)
{
IGridEntity entidad = child.GetComponentInChildren <IGridEntity>();
if (entidad != null)
{
yield return(child);
}
}
}
/// <summary>
/// Actualiza la posicion de una entidad dentro de la grilla.
/// </summary>
/// <param name="entity">La entidad que va a calcular su posición en la grilla</param>
public void UpdateEntityPosition(IGridEntity entity)
{
MonoBehaviour.print(entity + " its moving...");
//Chequeamos la posicion actual de la entidad y si hay un registro anterior de el, de lo contrario su registro sera "afuera"
Vector2 lastPos = _lastPositions.ContainsKey(entity) ? _lastPositions[entity] : outside;
Vector2 currentPos = GetPositionInGrid(entity.positionInWorld);
//Misma posición, no necesito hacer nada
if (lastPos == currentPos)
{
MonoBehaviour.print(entity + " Position its the same, no action required.");
return;
}
//Si la nueva posición cambio y esta dentro de la grilla...
bool toChange = IsInsideGrid(currentPos);
if (toChange)
{
//Lo "sacamos" de la celda anterior si la posición estaba dentro de la grilla.
if (lastPos != outside)
{
_buckets[(int)lastPos.x, (int)lastPos.y].Remove(entity);
}
//Lo "metemos" a la celda nueva, o lo sacamos si salio de la grilla
_buckets[(int)currentPos.x, (int)currentPos.y].Add(entity);
_lastPositions[entity] = currentPos;
MonoBehaviour.print(entity + " Position has been actualized, last position was: " + lastPos + " and his new position its: " + currentPos);
}
else //Esta afuera de la grilla
{
MonoBehaviour.print(entity + " Its outside of the Grid. ");
_lastPositions.Remove(entity);
}
}
