private void Flee(Strand strand, Chemoeffector noxious)
{
double distance;
distance = Geometry.GetDistance(strand.Position, noxious.Position);
if (distance <= 1)
{
this.ProcessCollision(strand, noxious, _repellents, _repellentCollisionAction, () => this.AddRepellent());
}
else
{
if (distance < strand.PreviousSensor)
{
this.Tumble(strand);
this.CheckCollisions(strand);
}
else
{
double newDistance;
Point heading;
heading = strand.Heading;
this.Tumble(strand);
strand.Move();
newDistance = Geometry.GetDistance(strand.Position, noxious.Position);
if (newDistance < distance)
{
strand.Heading = heading;
}
strand.UndoMove();
}
strand.PreviousSensor = distance;
}
}
private void Approach(Strand strand, Chemoeffector food)
{
double distance;
distance = Geometry.GetDistance(strand.Position, food.Position);
if (distance <= 1)
{
this.ProcessCollision(strand, food, _attractors, _attractorCollisionAction, this.CheckRespawn);
strand.PreviousSensor = 0;
}
else
{
if (distance > strand.PreviousSensor)
{
this.Tumble(strand);
this.CheckCollisions(strand);
}
else
{
double newDistance;
Point heading;
heading = strand.Heading;
this.Tumble(strand);
strand.Move();
newDistance = Geometry.GetDistance(strand.Position, food.Position);
if (newDistance >= distance)
{
strand.Heading = heading;
}
strand.UndoMove();
}
strand.PreviousSensor = distance;
}
}
private void ProcessCollision(Strand strand, Chemoeffector chemoeffector, ChemoeffectorCollection container, CollisionAction action, Action createNew)
{
if (action == CollisionAction.ReduceSelf)
{
chemoeffector.Strength--;
strand.Strength++;
}
else if (action == CollisionAction.ReduceOther)
{
strand.Strength--;
}
if (chemoeffector.Strength <= 0 || action == CollisionAction.DestroySelf)
{
container.Remove(chemoeffector);
createNew();
}
if (strand.Strength <= 0 || action == CollisionAction.DestroyOther)
{
_strands.Remove(strand);
}
}