/// <summary>
/// Pathfinding logic to get this actor to the specified position.
/// </summary>
/// <param name = "newPosition">The new position to move to.</param>
private void MoveToPosition(MovementDestination <Point> newPosition)
{
PathFinder <Point> pathFinder = Global.PathFinder;
if (newPosition.PointToMoveTo == _position && newPosition.MovementDestinationType == MovementDestinationType.SinglePoint)
{
Directions.Clear();
}
else if (newPosition.MovementDestinationType == MovementDestinationType.MultiPoint && newPosition.PointsAcceptable.Contains(_position))
{
Directions.Clear();
}
else
{
PathfindRequest <Point> newrequest = null;
switch (newPosition.MovementDestinationType)
{
case MovementDestinationType.SinglePoint:
newrequest = new PathfindRequest <Point>(_position, newPosition.PointToMoveTo, this);
break;
case MovementDestinationType.MultiPoint:
newrequest = new PathfindRequest <Point>(_position, this, newPosition.PointsAcceptable);
break;
default:
throw new Exception("Can not move to an unaccessable position.");
}
pathFinder.NewSearch(newrequest);
if (pathFinder.SearchStep(999) == SearchState.SearchStateSucceeded)
{
PathfindAnswer theAnswer = pathFinder.FinalResult();
Directions = theAnswer.Directions;
}
else
{
throw new Exception("Unable to path to that position.");
}
}
}
/// <summary>
/// Start a new search.
/// </summary>
/// <param name="request">Contains all the necessary information to perform the search by.</param>
public void NewSearch(PathfindRequest <T> request)
{
ClearCollections();
_startNode = new Node <T>(request.start);
_startNode.IsRootNode = true;
_singlePointSolution = request.SinglePointSolution;
if (_singlePointSolution)
{
_goalNode = new Node <T>(request.end);
}
else
{
_goalNode = new Node <T>(request.possibleSolutions[0]);
}
_startNode.H = GoalDistanceEstimate(request.start, request.end);
_startNode.F = _startNode.H + _startNode.G;
// Add the start node into the open list to begin the search
PushHeap(_startNode);
_stepCount = 0;
_searchState = SearchState.SearchStateSearching;
_traceManager.WriteLine("New Request - " + request, "path");
_possibleSolutions = request.possibleSolutions;
}
