public Vector2 GetVelocity(Boid targetBoid, Flock flock)
{
if (targetBoid == null)
{
throw new ArgumentNullException(nameof(targetBoid));
}
Vector2 shift = Vector2.Zero;
if (Math.Abs(this.AllowedArea.Left - targetBoid.Position.X) < this.proximityTreshold)
{
shift += new Vector2(-targetBoid.Velocity.X, 0.0f);
}
if (Math.Abs(this.AllowedArea.Right - targetBoid.Position.X) < this.proximityTreshold)
{
shift += new Vector2(-targetBoid.Velocity.X, 0.0f);
}
if (Math.Abs(this.AllowedArea.Top - targetBoid.Position.Y) < this.proximityTreshold)
{
shift += new Vector2(0.0f, -targetBoid.Velocity.Y);
}
if (Math.Abs(this.AllowedArea.Bottom - targetBoid.Position.Y) < this.proximityTreshold)
{
shift += new Vector2(0.0f, -targetBoid.Velocity.Y);
}
return shift;
}
private Flock CreateFlock(Point targetLocation)
{
Flock newFlock = new Flock();
int minBoids = 2;// 1;
int maxBoids = 20;// 2;
float positionDelta = 50;
int velocityDelta = 10;
int numberOfBoids = random.Next(minBoids, maxBoids);
float minX = targetLocation.X - positionDelta;
float maxX = targetLocation.X + positionDelta;
float minY = targetLocation.Y - positionDelta;
float maxY = targetLocation.Y + positionDelta;
float deltaX = Math.Abs(maxX - minX);
float deltaY = Math.Abs(maxY - minY);
for (int i = 0; i < numberOfBoids; i++)
{
Boid boid = new Boid
{
Velocity = new Vector2((float)random.Next(-velocityDelta, velocityDelta), (float)random.Next(-velocityDelta, velocityDelta)),
Position = new Vector2(minX + (float)random.NextDouble() * deltaX, minY + (float)random.NextDouble() * deltaY)
};
newFlock.Boids.Add(boid);
}
return newFlock;
}
public Vector2 GetVelocity(Boid targetBoid, Flock flock)
{
if (targetBoid == null)
{
throw new ArgumentNullException(nameof(targetBoid));
}
if (flock == null)
{
throw new ArgumentNullException(nameof(flock));
}
if (!flock.Boids.Contains(targetBoid)) // TODO: Time-consuming?..
{
throw new InvalidOperationException();
}
if (flock.Boids.Count < 2)
{
return Vector2.Zero;
}
Vector2 centerOfMass = Vector2.Zero;
foreach (Boid boid in flock.Boids)
{
if (targetBoid != boid)
{
centerOfMass += boid.Position;
}
}
centerOfMass /= flock.Boids.Count - 1;
return (centerOfMass - targetBoid.Position) * this.shiftCoefficient;
}
public Vector2 GetVelocity(Boid targetBoid, Flock flock)
{
if (targetBoid == null)
{
throw new ArgumentNullException(nameof(targetBoid));
}
if (flock == null)
{
throw new ArgumentNullException(nameof(flock));
}
if (!flock.Boids.Contains(targetBoid)) // TODO: Time-consuming?..
{
throw new InvalidOperationException();
}
if (flock.Boids.Count < 2)
{
return Vector2.Zero;
}
Vector2 velocity = new Vector2();
foreach (Boid boid in flock.Boids)
{
if (targetBoid != boid)
{
velocity += boid.Velocity;
}
}
velocity /= flock.Boids.Count - 1;
return (velocity - targetBoid.Velocity) * this.correctionCoefficient;
}
public virtual void Move(Flock flock)
{
if (flock == null)
{
throw new ArgumentNullException(nameof(flock));
}
foreach (Boid boid in flock.Boids)
{
this.MoveBoid(flock, boid);
}
}
private void pictureBox1_MouseClick(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
flock = CreateFlock(e.Location);
pictureBox1.Invalidate();
timer1.Start();
}
else if (e.Button == MouseButtons.Right)
{
timer1.Stop();
RemoveFlock();
}
}
protected virtual void MoveBoid(Flock flock, Boid boid)
{
if (flock == null)
{
throw new ArgumentNullException(nameof(flock));
}
if (boid == null)
{
throw new ArgumentNullException(nameof(boid));
}
Vector2 aggregateVelocity = boid.Velocity;
foreach (IFlockMoveRule rule in this.MoveRules)
{
aggregateVelocity += rule.GetVelocity(boid, flock);
}
boid.Velocity = aggregateVelocity;
boid.Position += aggregateVelocity;
}
public Vector2 GetVelocity(Boid targetBoid, Flock flock)
{
if (targetBoid == null)
{
throw new ArgumentNullException(nameof(targetBoid));
}
if (flock == null)
{
throw new ArgumentNullException(nameof(flock));
}
if (!flock.Boids.Contains(targetBoid)) // TODO: Time-consuming?..
{
throw new InvalidOperationException();
}
if (flock.Boids.Count < 2)
{
return Vector2.Zero;
}
Vector2 shift = Vector2.Zero;
foreach (Boid boid in flock.Boids)
{
if (targetBoid != boid)
{
if (Vector2.Distance(boid.Position, targetBoid.Position) < this.distanceTreshold)
{
shift -= boid.Position - targetBoid.Position;
}
}
}
return shift;
}
private void RemoveFlock()
{
flock = null;
pictureBox1.Invalidate();
}
protected override void Initialize()
{
base.Initialize();
flock = new Flock();
}
private void Awake()
{
_globalFlock = GameObject.FindGameObjectWithTag("GameController").GetComponent <Flock>();
}
