public double Utility(Desire desire, int count)
{
if (count == 0)
{
return(0);
}
double t = ((double)count / (double)desire.sufficient) * 4 - 2;
double S = 1.0 / (1.0 + Math.Pow(MathHelper.E, -t));
return(S * desire.level);
}
public NPC(Vector2 pos, ContentManager content)
{
state = new RestingState();
this.pos = pos;
firstName = RandUtil.Index(namePool);
npcClass = RandUtil.Index(classPool);
lastAnimationTime = TimeSpan.FromMilliseconds(0);
inventory = new Inventory();
facing = CharSprites.DOWN;
if (RandUtil.Bool())
{
gender = Gender.Male;
}
else
{
gender = Gender.Female;
}
//Give them some things relevant to their class
int numItems = RandUtil.Int(0, 5);
for (int i = 0; i < numItems; i++)
{
inventory.Add(new Item(RandUtil.Index(npcClass.desires), 1));
}
desires = new HashSet <Desire>();
var numDesires = RandUtil.Int(0, 4);
for (int i = 0; i < numDesires; i++)
{
var item = RandUtil.Index(npcClass.desires);
var level = RandUtil.Int(1, 10);
var sufficient = RandUtil.Int(1, 10);
Desire d = new Desire(new Item(item, 0), level, sufficient);
desires.Add(d);
}
var lastNamePrefx = RandUtil.Index(npcClass.lastNamePrefixes);
var lastNameSuffix = RandUtil.Index(npcClass.lastNameSuffixes);
lastName = lastNamePrefx + lastNameSuffix;
personality = RandUtil.Index(personalityPool);
}