source: branches/BinPackingExtension/HeuristicLab.Problems.BinPacking/3.3/3D/PermutationEncoding/ResidualSpaceBestFitExtremePointPermutationDecoder.cs @ 14976

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2016 Joseph Helm and 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
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 * 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 <http://www.gnu.org/licenses/>.
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#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Encodings.PermutationEncoding;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.Problems.BinPacking3D {
  [Item("Residual Space Best Fit Extreme-point Permutation Decoder (3d)", "Decodes the permutation and creates a packing solution candidate")]
  [StorableClass]
  public class ResidualSpaceBestFitExtremePointPermutationDecoder : ExtremePointPermutationDecoderBase {

    [StorableConstructor]
    protected ResidualSpaceBestFitExtremePointPermutationDecoder(bool deserializing) : base(deserializing) { }
    protected ResidualSpaceBestFitExtremePointPermutationDecoder(ResidualSpaceBestFitExtremePointPermutationDecoder original, Cloner cloner)
      : base(original, cloner) {
    }
    public ResidualSpaceBestFitExtremePointPermutationDecoder() : base() { }
    public override IDeepCloneable Clone(Cloner cloner) {
      return new ResidualSpaceBestFitExtremePointPermutationDecoder(this, cloner);
    }

    public override Solution Decode(Permutation permutation, PackingShape binShape, IList<PackingItem> items, bool useStackingConstraints) {
      Solution result = new Solution(binShape, useExtremePoints: true, stackingConstraints: useStackingConstraints);
      IList<int> remainingIDs = new List<int>(permutation);
      Dictionary<Tuple<BinPacking3D,PackingPosition>, int> points = new Dictionary<Tuple<BinPacking3D,PackingPosition>,int>();
      var bpg = new BinPacking3D(binShape);
      bpg.ExtremePointBasedPacking(ref remainingIDs, items, stackingConstraints: useStackingConstraints);
      result.Bins.Add(bpg);
      foreach (int ID in remainingIDs) {
        points = GetResidualSpaceAllPoints(result, items[ID]);
        var sortedPoints = points.OrderByDescending(x => x.Value).ToDictionary(x => x.Key, x => x.Value);
        if (!ExtremePointBasedPacking(sortedPoints, ID, items, stackingConstraints: useStackingConstraints)) { 
          var bp = new BinPacking3D(binShape);
          bp.ExtremePointBasedPacking(ID, items, stackingConstraints: useStackingConstraints);
          result.Bins.Add(bp);
        }
      }
      result.UpdateBinPackings();
      return result;
    }
  }
}