private Task PatrolEnter(State from)
{
PatrolState patrolState = stateMachine.GetCurrentState <PatrolState>();
if (patrolState == null)
{
throw new InvalidOperationException("PatrolEnter can only be used with PatrolState");
}
if (PathToFollow != null)
{
// Select a waypoint to patrol
patrolState.NextWaypoint =
PathToFollow.Path.SelectWaypoint(Entity.Transform.WorldMatrix.TranslationVector);
patrolState.MoveOperation = Move(patrolState.NextWaypoint.Position);
}
else
{
// Disable warnings for GDC
//Log.Warning($"Patrolling Drone {Entity} doesn't have a follow path assigned")
// Return to spawn
patrolState.MoveOperation = Move(spawnLocation);
}
return(Task.FromResult(0));
}
private Task ChaseStart(State from)
{
PatrolState patrolState = (PatrolState)from;
if (patrolState == null)
{
throw new InvalidOperationException("ChaseState can only be entered from PatrolState");
}
ChaseState chaseState = stateMachine.GetCurrentState <ChaseState>();
if (chaseState == null)
{
throw new InvalidOperationException("ChaseStart can only be used with ChaseState");
}
chaseState.ChaseTarget = patrolState.ChaseTarget;
chaseState.ChaseColliderTarget = patrolState.ChaseColliderTarget;
return(Task.FromResult(0));
}
private void PatrolUpdate()
{
PatrolState patrolState = stateMachine.GetCurrentState <PatrolState>();
if (patrolState == null)
{
throw new InvalidOperationException("PatrolUpdate can only be used with PatrolState");
}
// Move the drone on the current path, until the end of the move target is reached
if (patrolState.MoveOperation != null)
{
if (!patrolState.MoveOperation.MoveNext())
{
// Continue on path (if assigned)
if (PathToFollow != null)
{
// Done moving
patrolState.NextWaypoint = patrolState.NextWaypoint.Next;
if (patrolState.NextWaypoint == null)
{
patrolState.NextWaypoint = PathToFollow.Path.Waypoints[0]; // Loop back to first waypoint
}
patrolState.MoveOperation = Move(patrolState.NextWaypoint.Position);
}
else
{
// No move moving, this was a single target move
patrolState.MoveOperation = null;
}
}
}
else
{
// Not moving and no path to follow, reset to spawn rotation
Drone.UpdateBodyRotation(Drone.RotationToWorldDirection(spawnOrientation.Item1));
Drone.UpdateHeadRotation(spawnOrientation.Item2);
}
// Look in moving direction
Vector3 dir = Drone.CurrentVelocity;
dir.Normalize();
if (dir != Vector3.Zero)
{
Drone.UpdateHeadRotation(dir);
}
Drone.Alerted = false;
// Check for enemies
foreach (var collision in alertZoneTrigger.Collisions)
{
var targetCollider = collision.ColliderA.Entity != alertZoneTrigger.Entity
? collision.ColliderA
: collision.ColliderB;
if (Drone.Stunned)
{
if (targetCollider.CollisionGroup != CollisionFilterGroups.CustomFilter3)
{
continue;
}
}
else
{
if (targetCollider.CollisionGroup != CollisionFilterGroups.CharacterFilter &&
targetCollider.CollisionGroup != CollisionFilterGroups.CustomFilter1)
{
continue;
}
}
var enemy = Utils.GetDestructible(targetCollider.Entity);
if (targetCollider.Entity == Entity || enemy == null || enemy.IsDead)
{
continue;
}
// Visibility check
bool hasLineOfSight = CheckLineOfSight(Entity, targetCollider);
if (hasLineOfSight)
{
// Start chasing state
patrolState.ChaseTarget = targetCollider.Entity;
patrolState.ChaseColliderTarget = targetCollider;
stateMachine.SwitchTo(ChaseState.Name);
}
break;
}
}