public FDCreature GetPreferredAttackTargetInRange(int creatureId)
{
FDCreature creature = this.GetCreature(creatureId);
AttackItemDefinition attackItem = creature.Data.GetAttackItem();
if (attackItem == null)
{
return(null);
}
FDSpan span = attackItem.AttackScope;
DirectRangeFinder finder = new DirectRangeFinder(this.gameField, creature.Position, span.Max, span.Min);
FDRange range = finder.CalculateRange();
// Get a preferred target in range
foreach (FDPosition position in range.Positions)
{
FDCreature target = this.GetCreatureAt(position);
if (target != null && target.Faction == CreatureFaction.Enemy)
{
return(target);
}
}
return(null);
}
public override void TakeAction()
{
if (this.NeedAndCanRecover())
{
this.GameAction.DoCreatureRest(this.Creature.CreatureId);
return;
}
// Get target
FDCreature target = this.LookForAggressiveTarget();
// According to the target, find the nearest position within the Move scope, and get the path to that position
FDMovePath movePath = this.DecidePositionAndPath(target.Position);
// Do the walk
this.GameAction.CreatureWalk(new SingleWalkAction(this.Creature.CreatureId, movePath));
FDPosition destination = movePath.Desitination ?? this.Creature.Position;
AttackItemDefinition item = this.Creature.Data.GetAttackItem();
if (item != null)
{
FDSpan span = item.AttackScope;
DirectRangeFinder finder = new DirectRangeFinder(this.GameAction.GetField(), destination, span.Max, span.Min);
FDRange range = finder.CalculateRange();
if (range.Contains(target.Position))
{
// If in attack range, attack the target
this.GameAction.DoCreatureAttack(this.Creature.CreatureId, target.Position);
}
}
this.GameAction.DoCreatureRest(this.Creature.CreatureId);
}
protected FDMovePath DecidePositionAndPath(FDPosition targetPos)
{
DistanceResolver disResolver = new DistanceResolver(this.GameAction.GetField());
disResolver.ResolveDistanceFrom(targetPos, this.Creature.Position);
FDPosition originalPos = this.Creature.Position;
float bestDistance = 999;
int bestDistanceInUnit = -1;
bool inAttackScope = false;
MoveRangeFinder finder = new MoveRangeFinder(this.GameAction, this.Creature);
FDMoveRange moveRange = finder.CalculateMoveRange();
FDSpan span = null;
FDPosition finalPos = originalPos;
if (this.GameAction.GetCreatureAt(targetPos) != null)
{
span = Creature.Data.GetAttackItem()?.AttackScope;
}
else
{
span = new FDSpan(0, 0);
}
foreach (FDPosition movePos in moveRange.Positions)
{
int distanceToTarget = GetDirectDistance(targetPos, movePos);
if (span.ContainsValue(distanceToTarget))
{
inAttackScope = true;
if (distanceToTarget > bestDistanceInUnit)
{
bestDistanceInUnit = distanceToTarget;
finalPos = movePos;
}
}
if (!inAttackScope)
{
float distance = disResolver.GetDistanceTo(movePos);
if (distance < bestDistance)
{
bestDistance = distance;
finalPos = movePos;
}
}
}
return(moveRange.GetPath(finalPos));
}
public override void OnEnter()
{
base.OnEnter();
if (this.AttackRange == null)
{
AttackItemDefinition attackItem = this.Creature.Data.GetAttackItem();
if (attackItem == null)
{
return;
}
FDSpan span = attackItem.AttackScope;
DirectRangeFinder finder = new DirectRangeFinder(gameAction.GetField(), this.Creature.Position, span.Max, span.Min);
this.AttackRange = finder.CalculateRange();
}
// Display the attack range on the UI.
ShowRangePack pack = new ShowRangePack(this.AttackRange);
SendPack(pack);
}
