public AttackActivity(Actor self, Target target, bool allowMove, bool forceAttack, Color?targetLineColor = null)
{
attack = self.Trait <AttackFollow>();
move = allowMove ? self.TraitOrDefault <IMove>() : null;
revealsShroud = self.TraitsImplementing <RevealsShroud>().ToArray();
this.target = target;
this.forceAttack = forceAttack;
this.targetLineColor = targetLineColor;
// The target may become hidden between the initial order request and the first tick (e.g. if queued)
// Moving to any position (even if quite stale) is still better than immediately giving up
if ((target.Type == TargetType.Actor && target.Actor.CanBeViewedByPlayer(self.Owner)) ||
target.Type == TargetType.FrozenActor || target.Type == TargetType.Terrain)
{
lastVisibleTarget = Target.FromPos(target.CenterPosition);
lastVisibleMaximumRange = attack.GetMaximumRangeVersusTarget(target);
lastVisibleMinimumRange = attack.GetMinimumRangeVersusTarget(target);
if (target.Type == TargetType.Actor)
{
lastVisibleOwner = target.Actor.Owner;
lastVisibleTargetTypes = target.Actor.GetEnabledTargetTypes();
}
else if (target.Type == TargetType.FrozenActor)
{
lastVisibleOwner = target.FrozenActor.Owner;
lastVisibleTargetTypes = target.FrozenActor.TargetTypes;
}
}
}
public override bool Tick(Actor self)
{
if (IsCanceling)
{
return(true);
}
// Check that AttackFollow hasn't cancelled the target by modifying attack.Target
// Having both this and AttackFollow modify that field is a horrible hack.
if (hasTicked && attack.RequestedTarget.Type == TargetType.Invalid)
{
return(true);
}
if (attack.IsTraitPaused)
{
return(false);
}
target = target.Recalculate(self.Owner, out var targetIsHiddenActor);
attack.SetRequestedTarget(self, target, forceAttack);
hasTicked = true;
if (!targetIsHiddenActor && target.Type == TargetType.Actor)
{
lastVisibleTarget = Target.FromTargetPositions(target);
lastVisibleMaximumRange = attack.GetMaximumRangeVersusTarget(target);
lastVisibleMinimumRange = attack.GetMinimumRange();
lastVisibleOwner = target.Actor.Owner;
lastVisibleTargetTypes = target.Actor.GetEnabledTargetTypes();
// Try and sit at least one cell away from the min or max ranges to give some leeway if the target starts moving.
if (move != null && target.Actor.Info.HasTraitInfo <IMoveInfo>())
{
var preferMinRange = Math.Min(lastVisibleMinimumRange.Length + 1024, lastVisibleMaximumRange.Length);
var preferMaxRange = Math.Max(lastVisibleMaximumRange.Length - 1024, lastVisibleMinimumRange.Length);
lastVisibleMaximumRange = new WDist((lastVisibleMaximumRange.Length - 1024).Clamp(preferMinRange, preferMaxRange));
}
}
// The target may become hidden in the same tick the AttackActivity constructor is called,
// causing lastVisible* to remain uninitialized.
// Fix the fallback values based on the frozen actor properties
else if (target.Type == TargetType.FrozenActor && !lastVisibleTarget.IsValidFor(self))
{
lastVisibleTarget = Target.FromTargetPositions(target);
lastVisibleMaximumRange = attack.GetMaximumRangeVersusTarget(target);
lastVisibleOwner = target.FrozenActor.Owner;
lastVisibleTargetTypes = target.FrozenActor.TargetTypes;
}
var maxRange = lastVisibleMaximumRange;
var minRange = lastVisibleMinimumRange;
useLastVisibleTarget = targetIsHiddenActor || !target.IsValidFor(self);
// Most actors want to be able to see their target before shooting
if (target.Type == TargetType.FrozenActor && !attack.Info.TargetFrozenActors && !forceAttack)
{
var rs = revealsShroud
.Where(Exts.IsTraitEnabled)
.MaxByOrDefault(s => s.Range);
// Default to 2 cells if there are no active traits
var sightRange = rs != null ? rs.Range : WDist.FromCells(2);
if (sightRange < maxRange)
{
maxRange = sightRange;
}
}
// If we are ticking again after previously sequencing a MoveWithRange then that move must have completed
// Either we are in range and can see the target, or we've lost track of it and should give up
if (wasMovingWithinRange && targetIsHiddenActor)
{
return(true);
}
// Target is hidden or dead, and we don't have a fallback position to move towards
if (useLastVisibleTarget && !lastVisibleTarget.IsValidFor(self))
{
return(true);
}
var pos = self.CenterPosition;
var checkTarget = useLastVisibleTarget ? lastVisibleTarget : target;
// We've reached the required range - if the target is visible and valid then we wait
// otherwise if it is hidden or dead we give up
if (checkTarget.IsInRange(pos, maxRange) && !checkTarget.IsInRange(pos, minRange))
{
if (useLastVisibleTarget)
{
return(true);
}
return(false);
}
// We can't move into range, so give up
if (move == null || maxRange == WDist.Zero || maxRange < minRange)
{
return(true);
}
wasMovingWithinRange = true;
QueueChild(move.MoveWithinRange(target, minRange, maxRange, checkTarget.CenterPosition));
return(false);
}
public override Activity Tick(Actor self)
{
if (ChildActivity != null)
{
ChildActivity = ActivityUtils.RunActivity(self, ChildActivity);
if (ChildActivity != null)
{
return(this);
}
}
if (IsCanceling)
{
// Cancel the requested target, but keep firing on it while in range
if (attack.Info.PersistentTargeting)
{
attack.OpportunityTarget = attack.RequestedTarget;
attack.OpportunityForceAttack = attack.RequestedForceAttack;
attack.OpportunityTargetIsPersistentTarget = true;
}
attack.RequestedTarget = Target.Invalid;
return(NextActivity);
}
// Check that AttackFollow hasn't cancelled the target by modifying attack.Target
// Having both this and AttackFollow modify that field is a horrible hack.
if (hasTicked && attack.RequestedTarget.Type == TargetType.Invalid)
{
return(NextActivity);
}
if (attack.IsTraitPaused)
{
return(this);
}
bool targetIsHiddenActor;
attack.RequestedForceAttack = forceAttack;
attack.RequestedTarget = target = target.Recalculate(self.Owner, out targetIsHiddenActor);
attack.RequestedTargetLastTick = self.World.WorldTick;
hasTicked = true;
if (!targetIsHiddenActor && target.Type == TargetType.Actor)
{
lastVisibleTarget = Target.FromTargetPositions(target);
lastVisibleMaximumRange = attack.GetMaximumRangeVersusTarget(target);
lastVisibleMinimumRange = attack.GetMinimumRange();
lastVisibleOwner = target.Actor.Owner;
lastVisibleTargetTypes = target.Actor.GetEnabledTargetTypes();
// Try and sit at least one cell away from the min or max ranges to give some leeway if the target starts moving.
if (move != null && target.Actor.Info.HasTraitInfo <IMoveInfo>())
{
var preferMinRange = Math.Min(lastVisibleMinimumRange.Length + 1024, lastVisibleMaximumRange.Length);
var preferMaxRange = Math.Max(lastVisibleMaximumRange.Length - 1024, lastVisibleMinimumRange.Length);
lastVisibleMaximumRange = new WDist((lastVisibleMaximumRange.Length - 1024).Clamp(preferMinRange, preferMaxRange));
}
}
var oldUseLastVisibleTarget = useLastVisibleTarget;
var maxRange = lastVisibleMaximumRange;
var minRange = lastVisibleMinimumRange;
useLastVisibleTarget = targetIsHiddenActor || !target.IsValidFor(self);
// Most actors want to be able to see their target before shooting
if (target.Type == TargetType.FrozenActor && !attack.Info.TargetFrozenActors && !forceAttack)
{
var rs = revealsShroud
.Where(Exts.IsTraitEnabled)
.MaxByOrDefault(s => s.Range);
// Default to 2 cells if there are no active traits
var sightRange = rs != null ? rs.Range : WDist.FromCells(2);
if (sightRange < maxRange)
{
maxRange = sightRange;
}
}
// If we are ticking again after previously sequencing a MoveWithRange then that move must have completed
// Either we are in range and can see the target, or we've lost track of it and should give up
if (wasMovingWithinRange && targetIsHiddenActor)
{
attack.RequestedTarget = Target.Invalid;
return(NextActivity);
}
// Update target lines if required
if (useLastVisibleTarget != oldUseLastVisibleTarget)
{
self.SetTargetLine(useLastVisibleTarget ? lastVisibleTarget : target, Color.Red, false);
}
// Target is hidden or dead, and we don't have a fallback position to move towards
if (useLastVisibleTarget && !lastVisibleTarget.IsValidFor(self))
{
attack.RequestedTarget = Target.Invalid;
return(NextActivity);
}
var pos = self.CenterPosition;
var checkTarget = useLastVisibleTarget ? lastVisibleTarget : target;
// We've reached the required range - if the target is visible and valid then we wait
// otherwise if it is hidden or dead we give up
if (checkTarget.IsInRange(pos, maxRange) && !checkTarget.IsInRange(pos, minRange))
{
if (useLastVisibleTarget)
{
attack.RequestedTarget = Target.Invalid;
return(NextActivity);
}
return(this);
}
// We can't move into range, so give up
if (move == null || maxRange == WDist.Zero || maxRange < minRange)
{
attack.RequestedTarget = Target.Invalid;
return(NextActivity);
}
wasMovingWithinRange = true;
QueueChild(self, move.MoveWithinRange(target, minRange, maxRange, checkTarget.CenterPosition, Color.Red), true);
return(this);
}
