#region License Information /* HeuristicLab * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL) * * This file is part of HeuristicLab. * * HeuristicLab is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * HeuristicLab is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with HeuristicLab. If not, see . */ #endregion using System; using System.Collections.Generic; using HeuristicLab.Common; using HeuristicLab.Encodings.RealVectorEncoding; using HeuristicLab.Persistence.Default.CompositeSerializers.Storable; namespace HeuristicLab.Problems.TestFunctions.MultiObjective { [StorableClass] public abstract class ZDT : MultiObjectiveTestFunction { protected override IEnumerable GetOptimalParetoFront(int objectives) { return ParetoFrontStore.GetParetoFront("ZDT.ParetoFronts." + this.ItemName); } protected override double[,] GetBounds(int objectives) { return new double[,] { { 0, 1 } }; } protected override bool[] GetMaximization(int objectives) { return new bool[objectives]; } protected override double[] GetReferencePoint(int objecitives) { return new double[] { 11.0, 11.0 }; } protected override double GetBestKnownHypervolume(int objectives) { return -1; } [StorableConstructor] protected ZDT(bool deserializing) : base(deserializing) { } protected ZDT(MultiObjectiveTestFunction original, Cloner cloner) : base(original, cloner) { } protected ZDT() : base(minimumObjectives: 2, maximumObjectives: 2, minimumSolutionLength: 1, maximumSolutionLength: int.MaxValue) { } public override double[] Evaluate(RealVector r, int objectives) { if (objectives != 2) throw new ArgumentException("ZDT Problems must always have 2 objectives"); return Evaluate(r); } public abstract double[] Evaluate(RealVector r); } }