Hello all,
I have Gecode 3.7.3 on Ubuntu. I'm working in a scheduling problem with
optmization, therefore, I'm using MaximizeScript and the cumulatives
constraint.
Right now, I'm having problems with the cumulatives constraint, because, It
doesn't works properly. I have something like
take into account that: size = listVarMachines.size = listVarTStarts =
listVarTEnds = listDuration = listResources = listMachinesCapacity
for(int i = 0; i < size; i++){
cumulatives(
*this,
listVarMachines[i],
listVarTStarts[i],
listDuration[i],
listVarTEnds[i],
listResources[i],
listMachinesCapacity[i],
true,
ICL_BND);
}
where listVarMachines, listVarTStarts, listVarTEnds are declared in this
way -> vector<IntVarArray> listVar...
And listDuration, listResources and listMachinesCapacity are declared in
this way -> vector<IntArgs> list...
When I force the elements in the vector listMachinesCapacity to take a
value of 1. The program assign more than 1 task at the same time. This is
wrong, because with the Limit of resource equals to 1, the cumulatives
constraint should assign one and only one task in the same unit of time.
I think that the problems is that the cumulatives constraint isn't being
propagated for any reason. And I have doubts with the way in that the
variables are being updated.
In the update function I have something like this:
MyClass(bool share, MyClasss) : MaximizeScript(share, s) {
listVarMachines = s.listVarMachines;
listVarTStarts = s.listVarTStarts;
listVarTEnds = s.listVarTEnds;
for( int i=0; i < size; i++)
{
listVarMachines.update(*this, share, s.listVarMachines[i]);
listVarTStarts.update(*this, share, s.listVarTStarts[i]);
listVarTEnds .update(*this, share, s.listVarTEnds[i]);
}
}
Dou you think that the problem can be the way of I'm updating the
variables, or do you have another idea?
Thank you in advance!. Best regards,
Holmes
--
*"El secreto del éxito, está en la disciplina"*
Holmes Giovanny Salazar Osorio
Ingeniería de Sistemas
Estudiante 10mo Semestre
Universidad del Valle - Sede Tuluá
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