internal static bool nlopt_stop_time(GeneralConvergence stop)
{
var maxtime = stop.MaximumTime;
var start = stop.StartTime;
return(maxtime > TimeSpan.Zero && DateTime.Now - start >= maxtime);
}
internal static bool nlopt_stop_ftol(GeneralConvergence stop, double f, double oldf)
{
var ftol_rel = stop.RelativeFunctionTolerance;
var ftol_abs = stop.AbsoluteFunctionTolerance;
return(relstop(oldf, f, ftol_rel, ftol_abs));
}
internal static bool nlopt_stop_evals(GeneralConvergence stop)
{
var maxeval = stop.MaximumEvaluations;
var nevals = stop.Evaluations;
return(maxeval > 0 && nevals >= maxeval);
}
private void init(int n)
{
this.nmax = n;
this.stop = new GeneralConvergence(nmax);
pts = new double[n + 1][];
for (int i = 0; i < pts.Length; i++)
{
pts[i] = new double[n];
}
val = new double[n + 1];
c = new double[n];
xcur = new double[n];
xstep = new double[n];
for (int i = 0; i < xstep.Length; i++)
{
xstep[i] = 1e-5;
}
lb = new double[n];
for (int i = 0; i < lb.Length; i++)
{
lb[i] = Double.NegativeInfinity;
}
ub = new double[n];
for (int i = 0; i < ub.Length; i++)
{
ub[i] = Double.PositiveInfinity;
}
}
private void init(int n)
{
this.n = n;
this.stop = new GeneralConvergence(n);
nelderMead = new NelderMead(nsmax, subspace_func);
nelderMead.Convergence = this.stop;
xstep = new double[n];
xstep0 = new double[n];
for (int i = 0; i < xstep0.Length; i++)
{
xstep0[i] = 1e-5;
}
p = new int[n];
dx = new double[n];
xprev = new double[n];
absdx = new double[n];
lb = new double[n];
for (int i = 0; i < lb.Length; i++)
{
lb[i] = Double.NegativeInfinity;
}
ub = new double[n];
for (int i = 0; i < ub.Length; i++)
{
ub[i] = Double.PositiveInfinity;
}
}
private void init(int n)
{
this.n = n;
Convergence = new GeneralConvergence(n);
nelderMead = new NelderMead(nsmax, subspace_func);
nelderMead.Convergence = Convergence;
xstep = new double[n];
StepSize = new double[n];
for (var i = 0; i < StepSize.Length; i++)
{
StepSize[i] = 1e-5;
}
p = new int[n];
dx = new double[n];
xprev = new double[n];
absdx = new double[n];
LowerBounds = new double[n];
for (var i = 0; i < LowerBounds.Length; i++)
{
LowerBounds[i] = double.NegativeInfinity;
}
UpperBounds = new double[n];
for (var i = 0; i < UpperBounds.Length; i++)
{
UpperBounds[i] = double.PositiveInfinity;
}
}
internal static bool nlopt_stop_xtol(GeneralConvergence stop, double[] x, double[] oldx, int n)
{
var xtol_rel = stop.RelativeParameterTolerance;
var xtol_abs = stop.AbsoluteParameterTolerance;
for (int i = 0; i < n; ++i)
{
if (!relstop(oldx[i], x[i], xtol_rel, xtol_abs[i]))
{
return(false);
}
}
return(true);
}
internal static bool nlopt_stop_forced(GeneralConvergence stop)
{
return(stop.Cancel);
}