} // scheduleEventFromList
private void bookSlots(Slot s, Gene g)
{
if (g.getEvent().getWeekly() && s.getWeek() == "B")
{
s = getCorrespondingSlot(s);
}
for (int i = 0; i < g.getEvent().getDuration(); i++)
{
int slotIndex = Program.slots.IndexOf(s);
slotIndex += i;
s = Program.slots[slotIndex];
chromosome.Add(new Gene(s, g.getEvent(), g.getRoom(), g.getCannotChange()));
slotIndex = Program.slots.IndexOf(s);
slotIndex++;
if (slotIndex < Program.slots.Count)
{
s = Program.slots[slotIndex];
}
if (g.getEvent().getWeekly())
{
chromosome.Add(new Gene(s, g.getEvent(), g.getRoom(), g.getCannotChange()));
}
}
}
} // selection
public void crossover()
{
int numberOfGenerations = 0;
setAveFitAndStdDev();
while (numberOfGenerations < NUMGENERATIONS)
{
List <Chromosome> parents = selection();
List <Chromosome> newPopulation = new List <Chromosome>();
List <Gene> parent1;
List <Gene> parent2;
Console.WriteLine("Generation " + numberOfGenerations +
" average fitness = " + averagePopulationFitness);
while (newPopulation.Count < POPSIZE)
{
parent1 = parents[random.Next(parents.Count)].getGenes();
parent2 = parents[random.Next(parents.Count)].getGenes();
Chromosome child = new Chromosome();
/* schedule any fixed events first */
List <Gene> fixedEvents = (from g in parent1
where g.getCannotChange() == true
select g).ToList();
foreach (Gene g in fixedEvents)
{
child.add(g.getSlot(), g.getEvent(), g.getRoom(), g.getCannotChange());
}
/* schedule any lunch events next */
int[] days = { 1, 2, 4, 5 };
foreach (int day in days)
{
List <Gene> lunchEvents = (from g in parent1
where g.getEvent().getCourse() == "Lunch" &&
g.getSlot().getDay() == day
select g).ToList();
lunchEvents.AddRange(from g in parent2
where g.getEvent().getCourse() == "Lunch" &&
g.getSlot().getDay() == day
select g);
foreach (string grp in Program.groups)
{
List <Gene> slotsForGroup = (from g in lunchEvents
where g.getEvent().getGroups().Contains(grp)
select g).ToList();
Gene selectedLunchSlot = slotsForGroup[0];
/* Might have to put a check in here to ensure that not all of the groups
* (or at least a majority) have lunch at the same time */
if (slotsForGroup.Count > 1)
{
// check that there aren't any clashes (this might occur for groups with external events
bool slotFound = false;
int i = 0;
while ((i < slotsForGroup.Count) && (!slotFound))
{
if (!child.doClashesExist(slotsForGroup[i].getSlot(), slotsForGroup[i].getEvent(), slotsForGroup[i].getRoom()))
{
slotFound = true;
selectedLunchSlot = slotsForGroup[i];
}
i++;
}
}
if (!child.hasLunchBeenScheduled(selectedLunchSlot.getSlot(), selectedLunchSlot.getEvent()))
{
child.add(Program.slots[Program.slots.IndexOf(selectedLunchSlot.getSlot())],
selectedLunchSlot.getEvent(),
selectedLunchSlot.getRoom(),
selectedLunchSlot.getCannotChange());
child.add(Program.slots[Program.slots.IndexOf(child.getCorrespondingSlot(selectedLunchSlot.getSlot()))],
selectedLunchSlot.getEvent(),
selectedLunchSlot.getRoom(),
selectedLunchSlot.getCannotChange());
}
}
}
/* choose a random point from which to start going through the timetable */
Slot startSlot = Program.slots[random.Next(Program.slots.Count)];
int startPoint = Program.slots.IndexOf(startSlot);
for (int i = startPoint; i < Program.slots.Count; i++)
{
Slot s = Program.slots[i];
List <Gene> p1GenesWeekly = (from g in parent1
where (g.getSlot() == s)
select g).ToList();
List <Gene> p2GenesWeekly = (from g in parent2
where (g.getSlot() == s)
select g).ToList();
scheduleLists(s, p1GenesWeekly, p2GenesWeekly, child);
}
for (int i = 0; i < startPoint; i++)
{
Slot s = Program.slots[i];
List <Gene> p1GenesWeekly = (from g in parent1
where (g.getSlot() == s)
select g).ToList();
List <Gene> p2GenesWeekly = (from g in parent2
where (g.getSlot() == s)
select g).ToList();
scheduleLists(s, p1GenesWeekly, p2GenesWeekly, child);
}
if (random.NextDouble() < MUTATION)
{
child.mutate();
}
newPopulation.Add(child);
}
population = newPopulation;
numberOfGenerations++;
}
sortPopulation();
Console.WriteLine("\n\n" + population[0]);
} // crossover
private void bookSlots(Slot s, Gene g)
{
if (g.getEvent().getWeekly() && s.getWeek() == "B")
s = getCorrespondingSlot(s);
for (int i = 0; i < g.getEvent().getDuration(); i++)
{
int slotIndex = Program.slots.IndexOf(s);
slotIndex += i;
s = Program.slots[slotIndex];
chromosome.Add(new Gene(s, g.getEvent(), g.getRoom(), g.getCannotChange()));
slotIndex = Program.slots.IndexOf(s);
slotIndex++;
if (slotIndex < Program.slots.Count)
s = Program.slots[slotIndex];
if (g.getEvent().getWeekly())
chromosome.Add(new Gene(s, g.getEvent(), g.getRoom(), g.getCannotChange()));
}
}