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Fix target invalidation and reacquisition in fly activities.

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This commit is contained in:
Paul Chote
2019-01-25 21:52:09 +00:00
parent 8efa0da54d
commit 60fcf5951c
3 changed files with 126 additions and 30 deletions
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55
OpenRA.Mods.Common/Activities/Air/HeliFly.cs
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@@ -20,15 +20,28 @@ namespace OpenRA.Mods.Common.Activities
public class HeliFly : Activity
{
readonly Aircraft aircraft;
readonly Target target;
readonly WDist maxRange;
readonly WDist minRange;
readonly Color? targetLineColor;
bool soundPlayed;
Target target;
Target lastVisibleTarget;
bool useLastVisibleTarget;
public HeliFly(Actor self, Target t, WPos? initialTargetPosition = null, Color? targetLineColor = null)
{
aircraft = self.Trait<Aircraft>();
target = t;
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);
else if (initialTargetPosition.HasValue)
lastVisibleTarget = Target.FromPos(initialTargetPosition.Value);
}
public HeliFly(Actor self, Target t, WDist minRange, WDist maxRange,
@@ -58,12 +71,25 @@ namespace OpenRA.Mods.Common.Activities
{
// Refuse to take off if it would land immediately again.
if (aircraft.ForceLanding)
{
Cancel(self);
return NextActivity;
}
if (IsCanceled || !target.IsValidFor(self))
if (IsCanceled)
return NextActivity;
bool targetIsHiddenActor;
target = target.Recalculate(self.Owner, out targetIsHiddenActor);
if (!targetIsHiddenActor && target.Type == TargetType.Actor)
lastVisibleTarget = Target.FromTargetPositions(target);
var oldUseLastVisibleTarget = useLastVisibleTarget;
useLastVisibleTarget = targetIsHiddenActor || !target.IsValidFor(self);
// Update target lines if required
if (useLastVisibleTarget != oldUseLastVisibleTarget && targetLineColor.HasValue)
self.SetTargetLine(useLastVisibleTarget ? lastVisibleTarget : target, targetLineColor.Value, false);
// Target is hidden or dead, and we don't have a fallback position to move towards
if (useLastVisibleTarget && !lastVisibleTarget.IsValidFor(self))
return NextActivity;
if (!soundPlayed && aircraft.Info.TakeoffSounds.Length > 0 && self.IsAtGroundLevel())
@@ -75,30 +101,33 @@ namespace OpenRA.Mods.Common.Activities
if (AdjustAltitude(self, aircraft, aircraft.Info.CruiseAltitude))
return this;
var pos = target.CenterPosition;
var checkTarget = useLastVisibleTarget ? lastVisibleTarget : target;
// Rotate towards the target
var dist = pos - self.CenterPosition;
var desiredFacing = dist.HorizontalLengthSquared != 0 ? dist.Yaw.Facing : aircraft.Facing;
// Update facing
var delta = checkTarget.CenterPosition - aircraft.CenterPosition;
var desiredFacing = delta.HorizontalLengthSquared != 0 ? delta.Yaw.Facing : aircraft.Facing;
aircraft.Facing = Util.TickFacing(aircraft.Facing, desiredFacing, aircraft.TurnSpeed);
if (AdjustAltitude(self, aircraft, aircraft.Info.CruiseAltitude))
return this;
var move = aircraft.FlyStep(desiredFacing);
// Inside the minimum range, so reverse
if (minRange.Length > 0 && target.IsInRange(aircraft.CenterPosition, minRange))
if (minRange.Length > 0 && checkTarget.IsInRange(aircraft.CenterPosition, minRange))
{
aircraft.SetPosition(self, aircraft.CenterPosition - move);
return this;
}
// Inside the maximum range, so we're done
if (maxRange.Length > 0 && target.IsInRange(aircraft.CenterPosition, maxRange))
if (maxRange.Length > 0 && checkTarget.IsInRange(aircraft.CenterPosition, maxRange))
return NextActivity;
// The next move would overshoot, so just set the final position
if (dist.HorizontalLengthSquared < move.HorizontalLengthSquared)
if (delta.HorizontalLengthSquared < move.HorizontalLengthSquared)
{
var targetAltitude = aircraft.CenterPosition.Z + aircraft.Info.CruiseAltitude.Length - self.World.Map.DistanceAboveTerrain(aircraft.CenterPosition).Length;
aircraft.SetPosition(self, pos + new WVec(0, 0, targetAltitude - pos.Z));
aircraft.SetPosition(self, checkTarget.CenterPosition + new WVec(0, 0, targetAltitude - checkTarget.CenterPosition.Z));
return NextActivity;
}