public override Vector2 Decide(Flock_Agent agent, List <Transform> context, Flock flock)
{
if (weights.Length != behaviours.Length)
{
Debug.LogError("weights to behaviour length mismatch");
return(Vector2.zero); //do nothing
}
Vector2 move = Vector2.zero;
for (int i = 0; i < behaviours.Length; i++)
{
Vector2 partialMove = behaviours[i].Decide(agent, context, flock) * weights[i];
if (partialMove != Vector2.zero)
{
if (partialMove.sqrMagnitude > weights[i] * weights[i])
{
partialMove.Normalize(); //range the values
partialMove *= weights[i];
}
move += partialMove;
}
}
return(move);
}
public override Vector2 Decide(Flock_Agent agent, List <Transform> context, Flock flock)
{
if (context.Count == 0)
{
return(Vector2.zero);
}
Vector2 AvoidanceMove = Vector2.zero;
int inRange = 0;
foreach (Transform item in context)
{
if (Vector2.SqrMagnitude(item.position - agent.transform.position) < flock.SquareAvoidanceRadius)
{
inRange++;
AvoidanceMove += (Vector2)(agent.transform.position - item.position);
}
}
if (inRange > 0)
{
AvoidanceMove /= inRange; //average movement
}
return(AvoidanceMove);
}
public override Vector2 Decide(Flock_Agent agent, List <Transform> context, Flock flock)
{
Vector2 centerOffset = center - (Vector2)agent.transform.position;
float value = centerOffset.magnitude / radius;
if (value < 0.9f)
{
return(Vector2.zero);
}
return(centerOffset * value * value);
}
List <Transform> GetNearbyObjects(Flock_Agent bird)
{
List <Transform> context = new List <Transform>();
Collider2D[] contextCollider = Physics2D.OverlapCircleAll(bird.transform.position, neighbour_radius);
foreach (Collider2D c in contextCollider)
{
if (c != bird.AgentCollider)
{
context.Add(c.transform);
}
}
return(context);
}
void Start()
{
squaremaxspeed = flock_speed_offset * flock_speed_offset;
squareNeighbourRadius = neighbour_radius * neighbour_radius;
squareNeighbourRadius = avoidance_radius_multiplier * avoidance_radius_multiplier;
//populate
for (int i = 0; i < initialCount; i++)
{
Flock_Agent bird = Instantiate(
flock_prefab,
UnityEngine.Random.insideUnitCircle * initialCount * FlockDensity,
Quaternion.Euler(Vector3.forward * UnityEngine.Random.Range(0f, 350f)),
transform
);
bird.name = "bird" + i;
flocks.Add(bird);
}
}
//facing same direction
public override Vector2 Decide(Flock_Agent agent, List <Transform> context, Flock flock)
{
//if no neighbours just keep moving
if (context.Count == 0)
{
return(agent.transform.up);
}
Vector2 alignmentMove = Vector2.zero;
foreach (Transform item in context)
{
alignmentMove += (Vector2)item.transform.up;
}
alignmentMove /= context.Count; //average movement
return(alignmentMove);
}
public override Vector2 Decide(Flock_Agent agent, List <Transform> context, Flock flock)
{
if (context.Count == 0)
{
return(Vector2.zero);
}
Vector2 cohesionMove = Vector2.zero;
foreach (Transform item in context)
{
cohesionMove += (Vector2)item.position;
}
cohesionMove /= context.Count; //average movement
//create offset
cohesionMove -= (Vector2)agent.transform.position;
return(cohesionMove);
}
public override Vector2 Decide(Flock_Agent agent, List <Transform> context, Flock flock)
{
if (context.Count == 0)
{
return(Vector2.zero);
}
Vector2 cohesionMove = Vector2.zero;
foreach (Transform item in context)
{
cohesionMove += (Vector2)item.position;
}
cohesionMove /= context.Count; //average movement
//create offset
cohesionMove -= (Vector2)agent.transform.position;
cohesionMove = Vector2.SmoothDamp(agent.transform.up, cohesionMove, ref currentVelocity, agentSmoothTime);
//direction, whereto, velocity, timetakento move to "where to"
return(cohesionMove);
}
//avoidance or cohesion applied here public abstract Vector2 Decide(Flock_Agent agent, List <Transform> context, Flock flock);
