Hello everyone,

I have a question about discretization for interval variables.

I define an interval variable x using calls like:
- setStartMin(a) / setStartMax(b);
- setEndMin(c) / setEndMax(d);
- setLengthMin(e) / setLengthMax(e).

This produces something like:
x = intervalVar(optional, start = a..b, end = c..d, length = e).
With this setup the variable is discretized with step 1 (i.e., start/end/length take integer values with increment 1). 

I would like the variable to use a coarser discretization, for example step = 10 (so values go a, a+10, a+20, ...), rather than step = 1.
Is there a direct API/parameter to set the discretization (granularity / step size) for an interval variable? Or do I need to rescale/transform my parameters manually to achieve that behavior? 

Thanks in advance for any pointers or examples.

Hello Mateus,

        There is no direct API/parameter to do this. You can use the startOf method for instance:

model.add(IloStartOf(x) % 10 == 0);

Regards,