public bool TryAssignAttack(bool replace = true)
{
bool didAssignAttack = TryAssignAttackUnit(replace, Owner, AllUnits, AggroRadius);
// we prioritize units over buildings, since units can fight back
// At this time, only bad guys can attack buildings. May need to change
// this if we decide to add units that are built by the bad guys:
if (!didAssignAttack && Owner.UnitData.IsEnemy)
{
#if DEBUG
if (AllBuildings == null)
{
throw new NullReferenceException($"Need to assign {nameof(AllBuildings)} when instantiating this unit.");
}
#endif
float buildingAggroSquared = (AggroRadius + 24) * (AggroRadius + 24);
var foundBuilding = AllBuildings
.Where(item => (item.Position - Owner.Position).LengthSquared() < buildingAggroSquared)
.OrderBy(item => (item.Position - Owner.Position).LengthSquared())
.FirstOrDefault();
if (foundBuilding != null)
{
var attackBuildingGoal = Owner.AssignAttackGoal(foundBuilding, replace);
// prefer attacking units:
attackBuildingGoal.PreferAttackingUnits = true;
didAssignAttack = true;
}
}
return(didAssignAttack);
}
internal void AssignAttackThenRetreat(float worldX, float worldY, bool replace = true)
{
// we'll just make a circle:
var circle = new Circle();
circle.Radius = AttackThenRetreat.BuildingAttackingRadius;;
circle.X = worldX;
circle.Y = worldY;
var buildingsToTarget = AllBuildings
.Where(item => item.CollideAgainst(circle))
.Take(3)
.ToList();
// if there's no buildings, then just do a regular attack move:
if (buildingsToTarget.Count == 0)
{
AssignMoveAttackGoal(worldX, worldY, replace);
}
else
{
var goal = new AttackThenRetreat();
goal.StartX = this.X;
goal.StartY = this.Y;
goal.TargetX = worldX;
goal.TargetY = worldY;
goal.AllUnits = AllUnits;
goal.BuildingsToFocusOn.AddRange(buildingsToTarget);
goal.Owner = this;
if (replace)
{
this.HighLevelGoals.Clear();
}
this.HighLevelGoals.Push(goal);
this.ImmediateGoal = null;
}
}
public WalkToHighLevelGoal GetResourceReturnWalkGoal()
{
WalkToHighLevelGoal walkGoal = null;
// Set up to return resource
// Find "closest" building by position comparison.
// FUTURE: Get building with shorted node path (in case closest is a long winding path).
ResourceReturnBuilding = AllBuildings
.Where(building => building.BuildingData.Name == BuildingData.TownHall && building.IsConstructionComplete)
.OrderBy(building => (building.Position - Owner.Position).Length())
.FirstOrDefault();
if (ResourceReturnBuilding != null)
{
walkGoal = new WalkToHighLevelGoal();
ResourceReturnBuildingTile = GetSingleTile(ResourceReturnBuilding.Position);
Vector3 pointSlightlySkewedTowardOwner = DeterminePositionWithinTileSlightlyCloserToOwner(ResourceReturnBuildingTile.Position, ResourceReturnBuildingTile.Width);
walkGoal = new WalkToHighLevelGoal();
walkGoal.Owner = Owner;
walkGoal.TargetPosition = pointSlightlySkewedTowardOwner;
walkGoal.ForceAttemptToGetToExactTarget = true;
}
return(walkGoal);
}