public void Update()
{
creature.Move(direction, 1f);
elapsedTime += Time.deltaTime;
var myCell = trace.GetCellPos(transform.position);
float foodTrace;
float dangerTrace;
//update the danger signal
var neighbors = creature.Sensor.SensePredators(creature);
foreach (var neighbor in neighbors)
{
Debug.DrawLine(transform.position, neighbor.transform.position, Color.red);
}
dangerTrace = 2 * neighbors.Count;
//update the food
var plants = creature.Sensor.SensePlants(creature);
GameObject closestFood = plants.Count == 0 ? null : plants[0];
foreach (var food in plants)
{
Debug.DrawLine(food.transform.position, transform.position, Color.blue);
if (Vector3.Distance(food.transform.position, transform.position) <= Vector3.Distance(transform.position, closestFood.transform.position))
{
closestFood = food;
}
var foodCell = trace.GetCellPos(food.transform.position);
}
foodTrace = plants.Count;
if (plants.Count == 0)
{
dangerTrace += 0.5f;
}
if (neighbors.Count != 0)
{
lastDanger = dangerTrace;
}
lastFood = rememberanceFactor * lastFood + (1 - rememberanceFactor) * foodTrace;
lastDanger = rememberanceFactor * lastDanger + (1 - rememberanceFactor) * dangerTrace;
trace.AddFoodTrace(myCell.Item1, myCell.Item2, lastFood);
trace.AddDangerTrace(myCell.Item1, myCell.Item2, lastDanger);
// do we have a close piece of food ?
if (closestFood != null)
{
//reach it depending on the associated danger
var foodCell = trace.GetCellPos(closestFood.transform.position);
float risk = trace.danger[foodCell.Item1, foodCell.Item2] / (trace.food[foodCell.Item1, foodCell.Item2] + trace.danger[foodCell.Item1, foodCell.Item2]);
if (trace.danger[foodCell.Item1, foodCell.Item2] < 0.1f && trace.food[foodCell.Item1, foodCell.Item2] < 0.1f)
{
risk = 0f;
}
if (UnityEngine.Random.Range(0f, 1f) > risk)// || creature.Energy<creature.EnergyManager.EatingReward(closestFood,creature.CreatureRegime))
{
//go to the food and accept risk
direction = (closestFood.transform.position - transform.position);
return;
}
//if not choosing this risk, then go elsewhere (previous code)
}
if (elapsedTime < 1)
{
return;
}
elapsedTime = 0;
// Go to the gravity center of attraction/repulsion
Vector3 gCenter = Vector3.zero;
int count = 0;
bool explore = UnityEngine.Random.Range(0f, 1f) < 0.05f;
for (int i = -1; i < 2; i++)
{
for (int j = -1; j < 2; j++)
{
int cellx = i + myCell.Item1;
int cellz = j + myCell.Item2;
if (cellx >= 0 && cellz >= 0 && cellx < trace.food.GetLength(0) && cellz < trace.food.GetLength(1))
{
Vector3 pos = trace.GetVectorPos(cellx, cellz);
if (explore && trace.food[cellx, cellz] < 0.1f && trace.danger[cellx, cellz] < 0.1f)
{
gCenter += (pos - transform.position).normalized;
count++;
}
else
{
gCenter += (pos - transform.position).normalized * (trace.food[cellx, cellz] - trace.danger[cellx, cellz]);
count++;
}
}
}
}
direction = gCenter / count;
}