public List <F.Tuple <float, BaseUnitState> > GetNearestUnitTuples(NearestUnit parameters,
Func <BaseUnitState, bool> filter)
{
// Try preference first
var pos = parameters.SearchFrom;
var maxDistance = parameters.MaxDistance;
var laneKey = parameters.LaneKey;
var listOfTuples = new List <F.Tuple <float, BaseUnitState> >();
// Check against other units in lane
var units = _unitsByLane[laneKey];
var a = F.Reduce((accum, value) =>
{
if (filter(value) == false)
{
return(accum);
}
var dist = Vector2.Distance(pos, value.Position);
if (dist > maxDistance)
{
return(accum);
}
accum.Add(new F.Tuple <float, BaseUnitState>(dist, value));
return(accum);
}, listOfTuples, units);
return(a.ToList());
}
public BaseUnitState GetNearestUnit(NearestUnit parameters, Func <BaseUnitState, bool> filter)
{
var a = GetNearestUnitTuples(parameters, filter);
var preferredId = parameters.PreferredId;
if (preferredId != null && a.Any(t => t.Second.Id == preferredId))
{
return(GetUnitById(preferredId));
}
var b = a.OrderBy(x => x.First);
return(a.Count > 0 ? b.First().Second : null);
}
public BaseUnitState GetNearestUnit(BaseUnitState fromUnit, float distance)
{
var q = new NearestUnit
{
LaneKey = fromUnit.LaneKey,
MaxDistance = distance,
PreferredId = fromUnit.TargetId,
SearchFrom = fromUnit.Position
};
return(GetNearestUnit(q, unit =>
{
return unit.Id != fromUnit.Id &&
unit.Side != fromUnit.Side &&
unit.UnitType != UnitType.ControlPoint;
}));
}
