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 MoveStrand(Strand strand)
{
Chemoeffector noxious;
strand.Move();
noxious = this.GetClosestRepellor(strand);
if (noxious != null)
{
this.Flee(strand, noxious);
}
else
{
Chemoeffector food;
food = this.GetClosestAttractor(strand);
if (food != null)
{
this.Approach(strand, food);
}
else if (strand.PreviousSensor != 0)
{
strand.Heading = Compass.GetOpposite(strand.Heading);
this.Tumble(strand);
strand.PreviousSensor = 0;
this.CheckCollisions(strand);
}
else
{
this.Tumble(strand);
strand.PreviousSensor = 0;
this.CheckCollisions(strand);
}
}
}
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;
}
}
