public override void CalculateCost(AIBrain ai)
 {
     if (ai.HaveCurrentTarget())
     {
         float distFromTarget = ai.GetDistanceFromCurrentTarget();
         Cost = Mathf.Max(costInBetween.x, costInBetween.y - (Mathf.Clamp01(distFromTarget / minCostAtDistance) * (costInBetween.y - costInBetween.x)));
     }
     else
     {
         Cost = .5f;
     }
 }