/// <summary>
/// Add a goal that minimizes the distance between two nodes, i.e. weight*((id1-id2)^2).
/// </summary>
/// <param name="id1">Caller's unique identifier for the first node.</param>
/// <param name="id2">Caller's unique identifier for the second node.</param>
/// <param name="weight">The weight of the corresponding term in the goal function</param>
public void AddGoalTwoVariablesAreClose(int id1, int id2, double weight)
{
var var1 = GetVariable(id1);
if (var1 == null)
{
return;
}
var var2 = GetVariable(id2);
if (var2 == null)
{
return;
}
solver.AddNeighborPair(var1, var2, weight);
}