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 CheckCollisions(Strand strand)
{
for (int i = 0; i < _repellents.Count; i++)
{
if (Geometry.GetDistance(strand.Position, _repellents[i].Position) <= 1)
{
this.ProcessCollision(strand, _repellents[i], _repellents, _repellentCollisionAction, () => this.AddRepellent());
}
}
for (int i = 0; i < _attractors.Count; i++)
{
if (Geometry.GetDistance(strand.Position, _attractors[i].Position) <= 1)
{
this.ProcessCollision(strand, _attractors[i], _attractors, _attractorCollisionAction, this.CheckRespawn);
break;
}
}
if (_solidStrands)
{
for (int i = 0; i < _strands.Count; i++)
{
Strand other;
other = _strands[i];
if (!object.ReferenceEquals(strand, other) && strand.Position == other.Position)
{
strand.UndoMove();
strand.Heading = _movementRandom.NextDouble() >= 0.5 ? Compass.GetNextQuarter(strand.Heading) : Compass.GetPreviousQuarter(strand.Heading);
break;
}
}
}
}
