public override Vector2 CalculateMove(LifeAgent agent, List <Transform> context, Life life)
{
List <Transform> filteredContext = (filter == null) ? context : filter.Filter(agent, context);
if (filteredContext.Count == 0)
{
return(Vector2.zero);
}
Vector2 move = Vector2.zero;
foreach (Transform item in filteredContext)
{
float distance = Vector2.Distance(item.position, agent.transform.position);
float distancePercent = distance / life.neighborRadius;
float inverseDistancePercent = 1 - distancePercent;
float weight = inverseDistancePercent / filteredContext.Count;
Vector2 direction = (item.position - agent.transform.position) * weight;
move += direction;
}
return(move);
}
public override Vector2 CalculateMove(LifeAgent agent, List <Transform> context, Life life)
{
if (context.Count == 0)
{
return(Vector2.zero);
}
Vector2 avoidanceMove = Vector2.zero;
int numAvoid = 0;
List <Transform> filteredContext = (filter == null) ? context : filter.Filter(agent, context);
foreach (Transform item in filteredContext)
{
if (Vector2.SqrMagnitude(item.position - agent.transform.position) < life.SquareAvoidanceRadius)
{
numAvoid++;
avoidanceMove += (Vector2)(agent.transform.position - item.position);
}
}
if (numAvoid > 0)
{
avoidanceMove /= numAvoid;
}
return(avoidanceMove);
}
public override Vector2 CalculateMove(LifeAgent agent, List <Transform> context, Life life)
{
if (context.Count == 0)
{
//maintain same direction
return(agent.transform.up);
}
//add all points together and average
Vector2 alignmentMove = Vector2.zero;
List <Transform> filteredContext = (filter == null) ? context : filter.Filter(agent, context);
int count = 0;
foreach (Transform item in filteredContext)
{
if (Vector2.SqrMagnitude(item.position - agent.transform.position) <= life.SquareSmallRadius)
{
alignmentMove += (Vector2)item.transform.up;
count++;
}
}
if (count != 0)
{
alignmentMove /= count;
}
return(alignmentMove);
}
public override Vector2 CalculateMove(LifeAgent agent, List <Transform> context, Life life)
{
if (context.Count == 0)
{
return(Vector2.zero);
}
//add all points together and get the average
Vector2 cohesionMove = Vector2.zero;
List <Transform> filteredContext = (filter == null) ? context : filter.Filter(agent, context);
int count = 0;
foreach (Transform item in filteredContext)
{
if (Vector2.SqrMagnitude(item.position - agent.transform.position) <= life.SquareSmallRadius)
{
cohesionMove += (Vector2)item.position;
count++;
}
}
if (count != 0)
{
cohesionMove /= count;
}
//create offset from agent position
//direction from a to b = b - a
cohesionMove -= (Vector2)agent.transform.position;
return(cohesionMove);
}
public override Vector2 CalculateMove(LifeAgent agent, List <Transform> context, Life life)
{
//if no neighbours, return no adjustment
if (context.Count == 0)
{
return(Vector2.zero);
}
//add all points together and average
Vector2 cohesionMove = Vector2.zero;
//if(filter == null) {context} else{filter.Filter(agent, context)}
List <Transform> filteredContext = (filter == null) ? context : filter.Filter(agent, context);
int count = 0;
foreach (Transform item in filteredContext)
{
if (Vector2.SqrMagnitude(item.position - agent.transform.position) <= life.SquareSmallRadius)
{
cohesionMove += (Vector2)item.position;
count++;
}
}
if (count != 0)
{
cohesionMove /= count;
}
//create offset from agent position
cohesionMove -= (Vector2)agent.transform.position;
cohesionMove = Vector2.SmoothDamp(agent.transform.up, cohesionMove, ref currentVelocity, agentSmoothTime);
return(cohesionMove);
}
public override Vector2 CalculateMove(LifeAgent agent, List <Transform> context, Life life)
{
if (context.Count == 0)
{
return(Vector2.zero);
}
List <Transform> filteredContext = (filter == null) ? context : filter.Filter(agent, context);
List <Transform> obstacleContext = (filter == null) ? context : obstaclesFilter.Filter(agent, context);
if (filteredContext.Count == 0)
{
return(Vector2.zero);
}
//find nearest obstacle to hide behind
float nearestDistance = float.MaxValue;
Transform nearestObstacle = null;
foreach (Transform item in obstacleContext)
{
float distance = Vector2.Distance(item.position, agent.transform.position);
if (distance < nearestDistance)
{
nearestDistance = distance;
nearestObstacle = item;
}
}
//if no obstacle
if (nearestObstacle == null)
{
return(Vector2.zero);
}
//find best hiding spot
Vector2 hidePosition = Vector2.zero;
foreach (Transform item in filteredContext)
{
Vector2 obstacleDirection = nearestObstacle.position - item.position;
obstacleDirection = obstacleDirection.normalized * hideBehindObstacleDistance;
hidePosition += ((Vector2)nearestObstacle.position) + obstacleDirection;
}
hidePosition /= filteredContext.Count;
//for debug only
Debug.DrawRay(hidePosition, Vector2.up * 1f);
return(hidePosition - (Vector2)agent.transform.position);
}
public override Vector2 CalculateMove(LifeAgent agent, List <Transform> context, Life life)
{
if (path == null)
{
FindPath(agent, context);
}
return(FollowPath(agent));
}
private void Start()
{
squareMaxSpeed = maxSpeed * maxSpeed;
squareNeighborRadius = neighborRadius * neighborRadius;
squareAvoidanceRadius = squareNeighborRadius * avoidanceRadiusMultiplier * avoidanceRadiusMultiplier;
squareSmallRadius = squareNeighborRadius * smallRadiusMultiplier * smallRadiusMultiplier;
for (int i = 0; i < startingCount; i++)
{
LifeAgent newAgent = Instantiate(lifePrefab, Random.insideUnitCircle * startingCount * AgentDensity,
Quaternion.Euler(Vector3.forward * Random.Range(0, 360f)), transform);
}
}
private void FindPath(LifeAgent agent, List <Transform> context)
{
List <Transform> filteredContext = (filter == null) ? context : filter.Filter(agent, context);
if (filteredContext.Count == 0)
{
return;
}
int randomPath = Random.Range(0, filteredContext.Count);
path = filteredContext[randomPath].GetComponentInParent <Path>();
}
public bool InRadius(LifeAgent agent)
{
waypointDirection = (Vector2)path.waypoints[currentWaypoint].position - (Vector2)agent.transform.position;
if (waypointDirection.magnitude < path.radius)
{
return(true);
}
else
{
return(false);
}
}
public override List <Transform> Filter(LifeAgent agent, List <Transform> original)
{
List <Transform> filtered = new List <Transform>();
foreach (Transform item in original)
{
if (mask == (mask | (1 << item.gameObject.layer)))
{
filtered.Add(item);
}
}
return(filtered);
}
public override Vector2 CalculateMove(LifeAgent agent, List <Transform> context, Life life)
{
//direction to the center
//magnitude will = distance to the center
Vector2 centerOffset = center - (Vector2)agent.transform.position;
float t = centerOffset.magnitude / radius;
if (t < 0.9f)
{
return(Vector2.zero);
}
return(centerOffset * t * t);
}
List <Transform> GetNearbyObjects(LifeAgent agent)
{
List <Transform> context = new List <Transform>();
Collider2D[] contextColliders = Physics2D.OverlapCircleAll(agent.transform.position, neighborRadius);
foreach (Collider2D c in contextColliders)
{
if (c != agent.AgentCollider)
{
context.Add(c.transform);
}
}
return(context);
}
public override List <Transform> Filter(LifeAgent agent, List <Transform> original)
{
List <Transform> filtered = new List <Transform>();
foreach (Transform item in original)
{
LifeAgent itemAgent = item.GetComponent <LifeAgent>();
if (itemAgent != null)
{
if (itemAgent.AgentLife == agent.AgentLife)
{
filtered.Add(item);
}
}
}
return(filtered);
}
private Vector2 FollowPath(LifeAgent agent)
{
if (path == null)
{
return(Vector2.zero);
}
if (InRadius(agent))
{
currentWaypoint++;
if (currentWaypoint >= path.waypoints.Count)
{
currentWaypoint = 0;
}
return(Vector2.zero);
}
return(waypointDirection);
}
public override Vector2 CalculateMove(LifeAgent agent, List <Transform> context, Life life)
{
Vector2 move = Vector2.zero;
for (int i = 0; i < behaviors.Length; i++)
{
Vector2 partialMove = behaviors[i].behaviors.CalculateMove(agent, context, life) * behaviors[i].weights;
if (partialMove != Vector2.zero)
{
//make sure the number we get for moving the agent isnt larger than the weight we gave it
if (partialMove.sqrMagnitude > behaviors[i].weights * behaviors[i].weights)
{
partialMove.Normalize();
partialMove *= behaviors[i].weights;
}
//bring all the behaviors together as one
move += partialMove;
}
}
return(move);
}
public abstract Vector2 CalculateMove(LifeAgent agent, List <Transform> context, Life life);
public abstract List <Transform> Filter(LifeAgent agent, List <Transform> original);
