public static EmergentAgent NewAgent(EmergentBehaviour behaviour)
{
EmergentAgent a = new EmergentAgent();
a.currentBehaviour = behaviour;
a.position = Vector3.zero;
a.direction = Vector3.zero;
return(a);
}
public override void UpdateAgent(EmergentAgent a)
{
List <EmergentAgent> ns = _group.GetNeighbours(a, radiusOfNeighbourhood);
if (ns.Count > minGroupSize)
{
universalCohesion = Mathf.Sin(Time.time) + universalCohesionBias;
Vector3 groupAlignment = Vector3.zero;
Vector3 groupCenter = _group.transform.position;
Vector3 groupSeparation = default(Vector3);
Vector3 groupCohesion = default(Vector3);
for (int i = 0; i < ns.Count; i++)
{
groupAlignment += ns[i].direction;
groupCenter += ns[i].position;
groupSeparation += CalcSeparation(a, ns[i]);
}
//Alignment: Average all neighbours direction
groupAlignment /= ns.Count;
groupAlignment.Normalize();
//Cohesion: Direction towards the center of mass
groupCenter /= ns.Count;
groupCenter += (_group.transform.position - groupCenter) * universalCohesion;
groupCohesion = (groupCenter - a.position).normalized;
a.direction +=
groupAlignment * Time.deltaTime * alignmentWeight
+ groupCohesion * Time.deltaTime * cohesionWeight
+ groupSeparation * Time.deltaTime * separationWeight;
a.direction.Normalize();
}
else
{
//if we don't have enough friends then make a sad and introspective journey towards the center of the universe..
a.direction = (_group.transform.position - a.position).normalized;
}
a.position += a.direction * a.speedMetersPerSecond * Time.deltaTime;
if (a.transform != null)
{
a.transform.position = a.position;
}
}
Vector3 CalcSeparation(EmergentAgent agent, EmergentAgent other)
{
Vector3 heading = agent.position - other.position;
if (heading.magnitude < separationDistance)
{
float scale = heading.magnitude / separationDistance;
return(heading.normalized / scale);
}
else
{
return(Vector3.zero);
}
}
void CreateAgents(float speedmps, EmergentBehaviour behaviour)
{
_agents = new List <EmergentAgent>();
for (int i = 0; i < numberOfAgents; i++)
{
Vector3 d = UnityEngine.Random.onUnitSphere;
Vector3 p = transform.position + UnityEngine.Random.insideUnitSphere * startRadiusOfAllAgents;
EmergentAgent a = EmergentAgent.NewAgent(behaviour, p, d, agentSpeed, agentPrefab);
a.transform.SetParent(this.transform);
_agents.Add(a);
}
}
public static EmergentAgent NewAgent(EmergentBehaviour behaviour, Vector3 position, Vector3 direction, float speedMetersPerSecond, GameObject prefab)
{
EmergentAgent a = new EmergentAgent();
a.currentBehaviour = behaviour;
GameObject g = GameObject.Instantiate <GameObject>(prefab, position, Quaternion.identity);
a.transform = g.transform;
a.position = position;
a.direction = direction;
a.speedMetersPerSecond = speedMetersPerSecond;
return(a);
}
public List <EmergentAgent> GetNeighbours(EmergentAgent agent, float neighbourhoodRadius)
{
List <EmergentAgent> ns = new List <EmergentAgent>();
for (int i = 0; i < _agents.Count; i++)
{
if (agent == _agents[i])
{
continue;
}
if ((agent.position - _agents[i].position).magnitude <= neighbourhoodRadius)
{
ns.Add(_agents[i]);
}
}
return(ns);
}
public abstract void UpdateAgent(EmergentAgent a);
