/// <summary>
/// Run the specified decider and returns its value
/// </summary>
/// <param name="d">Decider to run</param>
/// <param name="tank">Tank being controlled</param>
/// <returns>True if decider wants to run</returns>
public static bool Decide(this DeciderType d, AITankControl tank)
{
switch (d)
{
case DeciderType.Always:
return(true);
case DeciderType.TooManyBullets:
return(Physics2D.OverlapCircleAll(tank.transform.position, BulletSearchRadius, (int)Layers.Projectiles).Length
> MaxBullets);
case DeciderType.LineOfSightToPlayer:
return(!BehaviorTreeNode.WallBetween(tank.transform.position, BehaviorTreeNode.Player.position));
case DeciderType.CanFire:
float angle = Vector2.Angle(BehaviorTreeNode.Player.position - tank.transform.position,
tank.transform.up);
return(angle < MaxAngularDifference &&
Vector2.Distance(tank.transform.position, BehaviorTreeNode.Player.position)
< DistanceThreshold);
default:
throw new ArgumentException("Unknown Decider: " + d);
}
}
/// <summary>
/// Compute the Neighbors list
/// </summary>
internal void Start()
{
var position = transform.position;
if (AllWaypoints == null)
{
AllWaypoints = FindObjectsOfType <Waypoint>();
}
foreach (var wp in AllWaypoints)
{
if (wp != this && !BehaviorTreeNode.WallBetween(position, wp.transform.position))
{
Neighbors.Add(wp);
}
}
}
/// <summary>
/// Nearest waypoint to specified location that is reachable by a straight-line path.
/// </summary>
/// <param name="position"></param>
/// <returns></returns>
public static Waypoint NearestWaypointTo(Vector2 position)
{
Waypoint nearest = null;
var minDist = float.PositiveInfinity;
for (int i = 0; i < AllWaypoints.Length; i++)
{
var wp = AllWaypoints[i];
var p = wp.transform.position;
var d = Vector2.Distance(position, p);
if (d < minDist && !BehaviorTreeNode.WallBetween(p, position))
{
nearest = wp;
minDist = d;
}
}
return(nearest);
}
