/// <summary>
/// Returns an estimate of the current mood of a position for a gob.
/// Mood is not measured in any specific units. Returned values are mutually comparable;
/// the larger the return value, the better the mood is.
/// </summary>
private static float GetMood(Gob gob, Vector2 pos)
{
const float MOOD_DISTANCE_MIN = 400;
const float MOOD_DISTANCE_MAX = 2000;
var constituents =
from minion in gob.Game.DataEngine.Minions
where minion != gob
let distance = Vector2.Distance(pos, minion.Pos)
let sign = gob.IsFriend(minion) ? 1 : -1
let amplitude = MathHelper.Clamp(1 - (distance - MOOD_DISTANCE_MIN) / (MOOD_DISTANCE_MAX - MOOD_DISTANCE_MIN), 0, 1)
select sign * amplitude;
return constituents.Sum();
}