/// <summary>
///
/// </summary>
/// <param name="Searcher"></param>
/// <param name="Closest">Can be a null input</param>
/// <param name="Distance">Can be up to float.PositiveInfinity</param>
public void FindNearestUnit(Unit Searcher, ref Unit Closest, ref float Distance)
{
if (isLeafNode)
{
for (int i = 0; i < Constituents.Length; i++)
{
if (Constituents[i].HitPoints > 0.0)
{
float tempDistance = (Constituents[i].Position - Searcher.Position).Length();
if (tempDistance < Distance)
{
Closest = Constituents[i];
Distance = tempDistance;
}
}
}
}
else
{
if (Searcher.IndexablePosition[SplitDimensionIndex] > SplitPosition)
{
GreaterNode.FindNearestUnit(Searcher, ref Closest, ref Distance);
if (Searcher.IndexablePosition[SplitDimensionIndex] - Distance < SplitPosition)
{
LessEqualNode.FindNearestUnit(Searcher, ref Closest, ref Distance);
}
}
else
{
LessEqualNode.FindNearestUnit(Searcher, ref Closest, ref Distance);
if (Searcher.IndexablePosition[SplitDimensionIndex] + Distance > SplitPosition)
{
GreaterNode.FindNearestUnit(Searcher, ref Closest, ref Distance);
}
}
}
}
/// <summary>
/// With BuddyUp, the Unit moves (with a bias) towards the first ally Unit it encounters
/// The unit still targets the closest enemy Unit
/// </summary>
private void Behavior_BuddyUp(GameTime gameTime, List <Unit_KDTree> EnemyTrees, Unit_KDTree AllyTree)
{
DirectionTimer -= gameTime.ElapsedGameTime.TotalSeconds;
if (DirectionTimer <= 0.0)
{
DirectionTimer = 3.0;
TargetPosition = Manager.terrain.GetRandomPosition();
}
if (OtherTarget == null || OtherTarget.HitPoints <= 0.0)
{
OtherTarget = null;
Distance = float.PositiveInfinity;
AllyTree.FindNearestUnit(this, ref OtherTarget, ref Distance);
}
else
{
TargetPosition = Vector3.Lerp(TargetPosition, OtherTarget.Position, (float)gameTime.ElapsedGameTime.TotalSeconds);
}
Move(gameTime);
Attack(gameTime, EnemyTrees);
}
/// <summary>
/// With BuddyUp, the Unit moves (with a bias) towards the first ally Unit it encounters
/// The unit still targets the closest enemy Unit
/// </summary>
private void Behavior_BuddyUp(GameTime gameTime, List<Unit_KDTree> EnemyTrees, Unit_KDTree AllyTree)
{
DirectionTimer -= gameTime.ElapsedGameTime.TotalSeconds;
if (DirectionTimer <= 0.0)
{
DirectionTimer = 3.0;
TargetPosition = Manager.terrain.GetRandomPosition();
}
if (OtherTarget == null || OtherTarget.HitPoints <= 0.0)
{
OtherTarget = null;
Distance = float.PositiveInfinity;
AllyTree.FindNearestUnit(this, ref OtherTarget, ref Distance);
}
else
{
TargetPosition = Vector3.Lerp(TargetPosition, OtherTarget.Position, (float)gameTime.ElapsedGameTime.TotalSeconds);
}
Move(gameTime);
Attack(gameTime, EnemyTrees);
}