public static BasicBrain GetBestTarget()
{
	BasicBrain result = null;
	float num = float.PositiveInfinity;
	foreach (BasicBrain basicBrain in MonoBehaviourSingletonBase<TeamAIManager>.Instance.GetMyEnemies(TeamAIDefs.Side.Player, null))
	{
		if (basicBrain.Memory != null && basicBrain.IsAlive && basicBrain.IsVisible)
		{
			PlayerGameData instance = MonoBehaviourSingletonBase<PlayerGameData>.Instance;
			Vector3 vector = MonoBehaviourSingletonBase<PlayerGameData>.Instance.SceneCamera.transform.InverseTransformPoint(basicBrain.Memory.RootTransform.position);
			Vector3 vector2 = MonoBehaviourSingletonBase<PlayerGameData>.Instance.SceneCamera.WorldToScreenPoint(basicBrain.Memory.RootTransform.position);
			if (vector2.x > 0f && vector2.x < (float)Screen.width && vector2.y > 0f && vector2.y < (float)Screen.height && vector.z > 0f)
			{
				Vector3 position3 = basicBrain.Memory.RootTransform.position;
				Vector3 position2 = instance.PlayerTransform.position;
				float sqrMagnitude = (position3 - position2).sqrMagnitude;
				if (sqrMagnitude < num)
				{
					result = basicBrain;
					num = sqrMagnitude;
				}
			}
		}
	}
	return result;
}