tuple<bool, Pvector> Boid::CalcLJ(Boid b, sf::Vector2f playerPos)
{
Pvector R;
Pvector p(playerPos.x, playerPos.y);
float neighbordist = 500;
float neighbordist2 = 200;
float A = 100;
float B = 5000;
float N = 1;
float M = 2;
float d = location.distance(b.location);
float d2 = location.distance(p);
if ((d2 > 0) && (d2 < neighbordist2))
{
R = location;
R.subVector(p);
float D = R.magnitude();
float U = -A / pow(D, N) + B / pow(D, M);
R.normalize();
R.mulScalar(U);
return tuple<bool, Pvector>(true, R);
}
else if ((d > 0) && (d < neighbordist)) // 0 < d < 500
{
R = location;
R.subVector(b.location);
float D = R.magnitude();
float U = -A / pow(D, N) + B / pow(D, M);
R.normalize();
R.mulScalar(U);
return tuple<bool, Pvector>(true, R);
}
else
return tuple<bool, Pvector>(false, R);
}
// Limits the maxSpeed, finds necessary steering force and
// normalizes vectors
Pvector Boid::seek(Pvector v)
{
Pvector desired;
desired.subVector(v); // A vector pointing from the location to the target
// Normalize desired and scale to maximum speed
desired.normalize();
desired.mulScalar(maxSpeed);
// Steering = Desired minus Velocity
acceleration.subTwoVector(desired, velocity);
acceleration.limit(maxForce); // Limit to maximum steering force
return acceleration;
}
