public QuadAssignment GenerateNeighbor(ISimAnSolution baseSolution)
{
if (!(baseSolution is QuadAssignment qaSol))
{
return(null);
}
// generate a copy of the existing assignment
QuadAssignment neighbor = new QuadAssignment();
foreach (var item in qaSol.AssignmentSolution)
{
neighbor.AssignmentSolution.Add(item.Key, item.Value);
}
// exchange one pair of unit-location assignments
int unit1 = _rnd.Next(0, QuadAssignment.MaterialFlow.GetLength(0));
int unit2 = _rnd.Next(0, QuadAssignment.MaterialFlow.GetLength(0));
int assignment1 = qaSol.AssignmentSolution[unit1];
int assignment2 = qaSol.AssignmentSolution[unit2];
neighbor.AssignmentSolution[unit1] = assignment2;
neighbor.AssignmentSolution[unit2] = assignment1;
// calculate objective value and return neighbor
neighbor.CalculateFitness();
return(neighbor);
}
public QuadAssignment GenerateStartSolution()
{
//assign each unit to one location (number of units assumed <= number of locations)
QuadAssignment startSolution = new QuadAssignment();
for (int u = 0; u < QuadAssignment.MaterialFlow.GetLength(0); u++)
{
startSolution.AssignmentSolution[u] = u;
}
startSolution.CalculateFitness();
return(startSolution);
}
