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Ignore:
Timestamp:
01/24/18 13:17:00 (6 years ago)
Author:
rhanghof
Message:

#2817:

  • Dealing with stackable items
  • Enhanced the Evaluator
  • Added parameters some paramters to the packing items
Location:
branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D
Files:
3 added
14 edited

Legend:

Unmodified
Added
Removed

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/Algorithms/ExtremePointAlgorithm.cs

    r15617 r15646  
    202202    /// <param name="token"></param>
    203203    /// <returns></returns>
    204     private Tuple<Solution, double, SortingMethod?, FittingMethod?, ExtremePointCreationMethod?> 
    205           GetBest(PackingShape bin, 
    206                   IList<PackingItem> items, 
    207                   SortingMethod[] sortings, 
     204    private Tuple<Solution, double, SortingMethod?, FittingMethod?, ExtremePointCreationMethod?>
     205          GetBest(PackingShape bin,
     206                  IList<PackingItem> items,
     207                  SortingMethod[] sortings,
    208208                  FittingMethod[] fittings,
    209209                  ExtremePointCreationMethod[] epCreationMethods,
    … …  
    222222            };
    223223            Permutation sortedItems;
    224                    
     224
    225225            if (SortByMaterialParameter.Value.Value) {
    226226              sortedItems = SortItemsByMaterialAndSortingMethod(bin, items, sort, DeltaParameter.Value.Value);
    … …  
    229229            }
    230230
    231             var result = Optimize(new OptimaizationParamters() {
     231            var solution = Optimize(new OptimaizationParamters() {
    232232              SortedItems = sortedItems,
    233233              Bin = bin,
    … …  
    238238              ExtremePointGeneration = epCreation
    239239            });
    240          
     240
     241            if (solution.IsBetterThan(bestSolution, Problem.SolutionEvaluator, Problem.Maximization)) {
     242              bestSolution = solution;
     243              best = Problem.SolutionEvaluator.Evaluate(solution);
     244              bestSorting = sort;
     245              bestFitting = fit;
     246              bestEPCreation = epCreation;
     247            }
     248
     249
     250            var x = Problem.SolutionEvaluator.Evaluate1(solution);
     251
     252            /*
    241253            if (double.IsNaN(result.Item2) || double.IsInfinity(result.Item2)) {
    242254              continue;
    … …  
    250262              bestEPCreation = epCreation;
    251263            }
     264            return true;*/
     265
    252266            if (token.IsCancellationRequested) {
    253267              return Tuple.Create(bestSolution, best, bestSorting, bestFitting, bestEPCreation);
    … …  
    267281    /// <param name="parameters"></param>
    268282    /// <returns></returns>
    269     private static Tuple<Solution, double> Optimize(OptimaizationParamters parameters) {
    270      
     283    private static Solution Optimize(OptimaizationParamters parameters) {
     284
    271285      var sol = parameters.Decoder.Decode(parameters.SortedItems, parameters.Bin, parameters.Items, parameters.StackingConstraints);
    272       var fit = parameters.Evaluator.Evaluate(sol);
    273 
    274       return Tuple.Create(sol, fit);
     286      //var fit = parameters.Evaluator.Evaluate(sol);
     287
     288      return sol; //Tuple.Create(sol, fit);
    275289    }
    276290
    … …  
    284298      public ExtremePointCreationMethod ExtremePointGeneration { get; set; }
    285299    }
    286    
     300
    287301
    288302    /// <summary>
    289303    /// Returns a new permutation of the given items depending on the sorting method
     304    /// </summary>
     305    /// <param name="bin"></param>
     306    /// <param name="items"></param>
     307    /// <param name="sortingMethod"></param>
     308    /// <param name="delta"></param>
     309    /// <returns></returns>
     310    private Permutation SortItemsByMaterialAndSortingMethod(PackingShape bin, IList<PackingItem> items, SortingMethod sortingMethod, double delta) {
     311      Permutation sorted = null;
     312
     313      switch (sortingMethod) {
     314        case SortingMethod.Given:
     315          sorted = new Permutation(PermutationTypes.Absolute, Enumerable.Range(0, items.Count).ToArray());
     316          break;
     317        case SortingMethod.VolumeHeight:
     318          sorted = items.SortByVolumeHeight();
     319          break;
     320        case SortingMethod.HeightVolume:
     321          sorted = items.SortByMaterialHeightVolume();
     322          break;
     323        case SortingMethod.AreaHeight:
     324          sorted = items.SortByMaterialAreaHeight();
     325          break;
     326        case SortingMethod.HeightArea:
     327          sorted = items.SortByMaterialHeightArea();
     328          break;
     329        case SortingMethod.ClusteredAreaHeight:
     330          sorted = items.SortByMaterialClusteredAreaHeight(bin, delta);
     331          break;
     332        case SortingMethod.ClusteredHeightArea:
     333          sorted = items.SortByMaterialClusteredHeightArea(bin, delta);
     334          break;
     335        default:
     336          throw new ArgumentException("Unknown sorting method: " + sortingMethod);
     337      }
     338      return sorted;
     339    }
     340
     341    /// <summary>
     342    /// Returns a new permutation of the given items depending on the material and sorting method
    290343    /// </summary>
    291344    /// <param name="bin"></param>
    … …  
    296349    private Permutation SortItemsBySortingMethod(PackingShape bin, IList<PackingItem> items, SortingMethod sortingMethod, double delta) {
    297350      Permutation sorted = null;
    298      
     351
    299352      switch (sortingMethod) {
    300353        case SortingMethod.Given:
    … …  
    305358          break;
    306359        case SortingMethod.HeightVolume:
    307           sorted = items.SortByMaterialHeightVolume();
     360          sorted = items.SortByHeightVolume();
    308361          break;
    309362        case SortingMethod.AreaHeight:
    310           sorted = items.SortByMaterialAreaHeight();
     363          sorted = items.SortByAreaHeight();
    311364          break;
    312365        case SortingMethod.HeightArea:
    313           sorted = items.SortByMaterialHeightArea();
     366          sorted = items.SortByHeightArea();
    314367          break;
    315368        case SortingMethod.ClusteredAreaHeight:
    316           sorted = items.SortByMaterialClusteredAreaHeight(bin, delta);
     369          sorted = items.SortByClusteredAreaHeight(bin, delta);
    317370          break;
    318371        case SortingMethod.ClusteredHeightArea:
    319           sorted = items.SortByMaterialClusteredHeightArea(bin, delta);
     372          sorted = items.SortByClusteredHeightArea(bin, delta);
    320373          break;
    321374        default:
    … …  
    324377      return sorted;
    325378    }
    326 
    327     /// <summary>
    328     /// Returns a new permutation of the given items depending on the material and sorting method
    329     /// </summary>
    330     /// <param name="bin"></param>
    331     /// <param name="items"></param>
    332     /// <param name="sortingMethod"></param>
    333     /// <param name="delta"></param>
    334     /// <returns></returns>
    335     private Permutation SortItemsByMaterialAndSortingMethod(PackingShape bin, IList<PackingItem> items, SortingMethod sortingMethod, double delta) {
    336       Permutation sorted = null;
    337 
    338       switch (sortingMethod) {
    339         case SortingMethod.Given:
    340           sorted = new Permutation(PermutationTypes.Absolute, Enumerable.Range(0, items.Count).ToArray());
    341           break;
    342         case SortingMethod.VolumeHeight:
    343           sorted = items.SortByVolumeHeight();
    344           break;
    345         case SortingMethod.HeightVolume:
    346           sorted = items.SortByHeightVolume();
    347           break;
    348         case SortingMethod.AreaHeight:
    349           sorted = items.SortByAreaHeight();
    350           break;
    351         case SortingMethod.HeightArea:
    352           sorted = items.SortByHeightArea();
    353           break;
    354         case SortingMethod.ClusteredAreaHeight:
    355           sorted = items.SortByClusteredAreaHeight(bin, delta);
    356           break;
    357         case SortingMethod.ClusteredHeightArea:
    358           sorted = items.SortByClusteredHeightArea(bin, delta);
    359           break;
    360         default:
    361           throw new ArgumentException("Unknown sorting method: " + sortingMethod);
    362       }
    363       return sorted;
    364     }
    365379  }
    366380}

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/BinPacking3D.cs

    r15617 r15646  
    3434  [StorableClass]
    3535  public class BinPacking3D : BinPacking<PackingPosition, PackingShape, PackingItem> {
    36    
     36
    3737    [Storable]
    3838    public IDictionary<PackingPosition, IEnumerable<ResidualSpace>> ExtremePoints { get; protected set; }
    … …  
    4242      : base(binShape) {
    4343      ExtremePoints = new SortedList<PackingPosition, IEnumerable<ResidualSpace>>();
    44      
    45       ExtremePoints.Add(binShape.Origin, new List<ResidualSpace>() {ResidualSpace.Create(binShape.Width, binShape.Height, binShape.Depth)});
     44
     45      ExtremePoints.Add(binShape.Origin, new List<ResidualSpace>() { ResidualSpace.Create(binShape.Width, binShape.Height, binShape.Depth) });
    4646    }
    4747
    … …  
    6666    }
    6767
    68    
     68
    6969
    7070    /// <summary>
    … …  
    9696
    9797
    98       /*
    99     /// <summary>
    100     /// Updates the extreme points of the bin.
    101     /// As there is no need to project the extreme points to the next side of an item, the extreme points are only generated for the current item.
    102     /// </summary>
    103     /// <param name="item"></param>
    104     /// <param name="position"></param>
    105     private void UpdateExtremePointsWithStackingConstriants(PackingItem newItem, PackingPosition position) {
    106       int newWidth = position.Rotated ? newItem.Depth : newItem.Width;
    107       int newDepth = position.Rotated ? newItem.Width : newItem.Depth;
    108       var ep1 = new PackingPosition(position.AssignedBin, position.X + newWidth, position.Y, position.Z);
    109       var ep2 = new PackingPosition(position.AssignedBin, position.X, position.Y + newItem.Height, position.Z);
    110       var ep3 = new PackingPosition(position.AssignedBin, position.X, position.Y, position.Z + newDepth);
    111       AddExtremePoint(ep1);
    112       AddExtremePoint(ep2);
    113       AddExtremePoint(ep3);
    114     }*/
    115 
    116      
     98    /*
     99  /// <summary>
     100  /// Updates the extreme points of the bin.
     101  /// As there is no need to project the extreme points to the next side of an item, the extreme points are only generated for the current item.
     102  /// </summary>
     103  /// <param name="item"></param>
     104  /// <param name="position"></param>
     105  private void UpdateExtremePointsWithStackingConstriants(PackingItem newItem, PackingPosition position) {
     106    int newWidth = position.Rotated ? newItem.Depth : newItem.Width;
     107    int newDepth = position.Rotated ? newItem.Width : newItem.Depth;
     108    var ep1 = new PackingPosition(position.AssignedBin, position.X + newWidth, position.Y, position.Z);
     109    var ep2 = new PackingPosition(position.AssignedBin, position.X, position.Y + newItem.Height, position.Z);
     110    var ep3 = new PackingPosition(position.AssignedBin, position.X, position.Y, position.Z + newDepth);
     111    AddExtremePoint(ep1);
     112    AddExtremePoint(ep2);
     113    AddExtremePoint(ep3);
     114  }*/
     115
     116
     117    #region MassPoint
     118
     119    /// <summary>
     120    /// This property contains the value of the mass point for the current bin packing.
     121    /// </summary>
     122    public Tuple<double, double, double> MassPoint { get { return CalculateMassPoint(); } }
     123
     124    private Tuple<double, double, double> CalculateMassPoint() {
     125      var packingMassPoint = new { X = 0.0, Y = 0.0, Z = 0.0 };
     126      var totalWeight = 0.0;
     127      foreach (var item in Items) {
     128        var position = Positions[item.Key];
     129        var w = item.Value.Width;
     130        var h = item.Value.Height;
     131        var d = item.Value.Depth;
     132
     133        var massPoint = new { X = position.X + w / 2.0, Y = position.Y + h / 2.0, Z = position.Z + d / 2.0 };
     134        var weight = Math.Max(item.Value.Weight, 1);
     135        if (packingMassPoint == null) {
     136          packingMassPoint = massPoint;
     137          totalWeight += weight;
     138        } else {
     139          var newTotalWeight = totalWeight + weight;
     140          packingMassPoint = new {
     141            X = (massPoint.X * weight + packingMassPoint.X * totalWeight) / newTotalWeight,
     142            Y = (massPoint.Y * weight + packingMassPoint.Y * totalWeight) / newTotalWeight,
     143            Z = (massPoint.Z * weight + packingMassPoint.Z * totalWeight) / newTotalWeight
     144          };
     145          totalWeight = newTotalWeight;
     146        }
     147      }
     148     
     149      return Tuple.Create<double, double, double>(packingMassPoint.X, packingMassPoint.Y, packingMassPoint.Z);
     150    }
     151    #endregion
    117152
    118153    #region Position feasability
    … …  
    128163    /// <returns></returns>
    129164    public override bool IsPositionFeasible(PackingItem item, PackingPosition position, bool stackingConstraints) {
    130       //var b1 = CheckItemDimensions(item, position);
    131       var b2 = ItemCanBePlaced(item, position);
    132       var b3 = CheckStackingConstraints(item, position, stackingConstraints);
    133 
    134       return b2 && b3;
    135     }
     165      return ItemCanBePlaced(item, position) && CheckStackingConstraints(item, position, stackingConstraints);
     166    }
     167
     168
    136169
    137170    /// <summary>
    … …  
    142175    /// <returns></returns>
    143176    private bool ItemCanBePlaced(PackingItem givenItem, PackingPosition givenItemPosition) {
    144       var width = givenItemPosition.Rotated ? givenItem.Depth : givenItem.Width;
    145       var depth = givenItemPosition.Rotated ? givenItem.Width : givenItem.Depth;
    146177      // Check if the boundings of the bin would injured
    147       if (givenItemPosition.X + width > BinShape.Width ||
     178      if (givenItemPosition.X + givenItem.Width > BinShape.Width ||
    148179          givenItemPosition.Y + givenItem.Height > BinShape.Height ||
    149           givenItemPosition.Z + depth > BinShape.Depth) {
     180          givenItemPosition.Z + givenItem.Depth > BinShape.Depth) {
    150181        return false;
    151182      }
    … …  
    201232    private bool HasOnePointWithAnItemBelow(PackingItem item, PackingPosition position) {
    202233      bool p1, p2, p3, p4;
    203       PointsLiesOnAnItem(item, position, out p1, out p2, out p3, out p4);
     234      PointsLiesOnAnStackableItem(item, position, out p1, out p2, out p3, out p4);
    204235
    205236      return p1 || p2 || p3 || p4;
    … …  
    215246    public override bool IsStaticStable(PackingItem item, PackingPosition position) {
    216247      bool p1, p2, p3, p4;
    217       PointsLiesOnAnItem(item, position, out p1, out p2, out p3, out p4);
     248      PointsLiesOnAnStackableItem(item, position, out p1, out p2, out p3, out p4);
    218249      return p1 && p2 && p3 && p4;
    219250    }
    … …  
    234265    /// <param name="p3"></param>
    235266    /// <param name="p4"></param>
    236     private void PointsLiesOnAnItem(PackingItem item, PackingPosition position, out bool p1, out bool p2, out bool p3, out bool p4) {
     267    private void PointsLiesOnAnStackableItem(PackingItem item, PackingPosition position, out bool p1, out bool p2, out bool p3, out bool p4) {
    237268      IEnumerable<Tuple<PackingPosition, PackingItem>> itemsP1;
    238269      IEnumerable<Tuple<PackingPosition, PackingItem>> itemsP2;
    … …  
    242273      GetItemsUnderItemWithContact(item, position, out itemsP1, out itemsP2, out itemsP3, out itemsP4);
    243274
    244       p1 = itemsP1.Where(x => position.X < x.Item1.X + x.Item2.Width && position.Z < x.Item1.Z + x.Item2.Depth).Any();
    245       p2 = itemsP2.Where(x => position.X + item.Width > x.Item1.X && position.Z < x.Item1.Z + x.Item2.Depth).Any();
    246       p3 = itemsP3.Where(x => position.X + item.Width > x.Item1.X && position.Z + item.Depth > x.Item1.Z).Any();
    247       p4 = itemsP4.Where(x => position.X < x.Item1.X + x.Item2.Width && position.Z + item.Depth > x.Item1.Z).Any();
     275      p1 = itemsP1.Where(x => x.Item2.IsStackabel && position.X < x.Item1.X + x.Item2.Width && position.Z < x.Item1.Z + x.Item2.Depth).Any();
     276      p2 = itemsP2.Where(x => x.Item2.IsStackabel && position.X + item.Width > x.Item1.X && position.Z < x.Item1.Z + x.Item2.Depth).Any();
     277      p3 = itemsP3.Where(x => x.Item2.IsStackabel && position.X + item.Width > x.Item1.X && position.Z + item.Depth > x.Item1.Z).Any();
     278      p4 = itemsP4.Where(x => x.Item2.IsStackabel && position.X < x.Item1.X + x.Item2.Width && position.Z + item.Depth > x.Item1.Z).Any();
    248279    }
    249280
    … …  
    315346
    316347    #region Get items
    317    
     348
    318349    private IEnumerable<Tuple<PackingPosition, PackingItem>> GetItemsBelow(PackingPosition pos) {
    319350      var line = new Line3D(pos, new Vector3D(0, 1, 0));

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/Evaluators/BinUtilizationEvaluator.cs

    r15617 r15646  
    6767    }
    6868
     69    private static int GetBinCount(Solution solution) {
     70      return solution.NrOfBins;
     71    }
     72
     73    private static int GetNumberOfResidualSpaces(Solution solution) {
     74      var cnt = 0;
     75      foreach (var binPacking in solution.Bins) {
     76        foreach (var item in ((BinPacking3D)binPacking).ExtremePoints) {
     77          cnt += item.Value.Count();
     78        }
     79      }
     80      return cnt;
     81    }
     82
     83    public Tuple<int, double, int> Evaluate1(Solution solution) {
     84
     85
     86      var res = Tuple.Create<int, double, int>(
     87        GetBinCount(solution),
     88        CalculateBinUtilizationFirstBin(solution),
     89        GetNumberOfResidualSpaces(solution)
     90        );
     91
     92      return res;
     93    }
     94
     95    private static double CalculateBinUtilizationFirstBin(Solution solution) {
     96      if (solution.NrOfBins <= 0) {
     97        return 0.0;
     98      }
     99
     100      double totalUsedSpace = 0;
     101      double totalUsableSpace = 0;
     102
     103      totalUsableSpace += solution.Bins[0].BinShape.Volume;
     104      totalUsedSpace += solution.Bins[0].Items.Sum(kvp => kvp.Value.Volume);
     105
     106      return totalUsedSpace / totalUsableSpace;
     107    }
     108
     109
    69110    #endregion
    70111  }

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/Evaluators/IEvaluator.cs

    r15617 r15646  
    2121
    2222using HeuristicLab.Core;
     23using System;
    2324
    2425namespace HeuristicLab.Problems.BinPacking3D {
    … …  
    3435    /// <returns>Returns the value of the evaluated solution depending on the implementation</returns>
    3536    double Evaluate(Solution solution);
     37
     38    /// <summary>
     39    /// Returns a tuple of (number of bins, bin utilization, number of residual spaces)
     40    /// </summary>
     41    /// <param name="solution"></param>
     42    /// <returns></returns>
     43    Tuple<int, double, int> Evaluate1(Solution solution);
    3644  }
    3745}

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/Evaluators/PackingRatioEvaluator.cs

    r15617 r15646  
    8484    }
    8585
     86    private static int GetBinCount(Solution solution) {
     87      return solution.NrOfBins;
     88    }
     89
     90    private static int GetNumberOfResidualSpaces(Solution solution) {
     91      var cnt = 0;
     92      foreach (var binPacking in solution.Bins) {
     93        foreach (var item in ((BinPacking3D)binPacking).ExtremePoints) {
     94          cnt += item.Value.Count();
     95        }
     96      }
     97      return cnt;
     98    }
     99
     100    public Tuple<int, double, int> Evaluate1(Solution solution) {
     101
     102
     103      var res = Tuple.Create<int, double, int>(
     104        GetBinCount(solution),
     105        CalculateBinUtilizationFirstBin(solution),
     106        GetNumberOfResidualSpaces(solution)
     107        );
     108
     109      return res;
     110    }
     111
     112    private static double CalculateBinUtilizationFirstBin(Solution solution) {
     113      if (solution.NrOfBins <= 0) {
     114        return 0.0;
     115      }
     116
     117      double totalUsedSpace = 0;
     118      double totalUsableSpace = 0;
     119
     120      totalUsableSpace += solution.Bins[0].BinShape.Volume;
     121      totalUsedSpace += solution.Bins[0].Items.Sum(kvp => kvp.Value.Volume);
     122
     123      return totalUsedSpace / totalUsableSpace;
     124    }
     125
    86126    #endregion
    87127  }

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/ExtremePointCreation/LineProjectionBasedEPCreator.cs

    r15617 r15646  
    166166    protected override void GenerateNewExtremePointsForItem(BinPacking3D binPacking, PackingItem newItem, PackingPosition position) {
    167167      PointProjectionForNewItem(binPacking, newItem, position);
    168       EdgeProjectionForNewItem(binPacking, newItem, position);
     168      //EdgeProjectionForNewItem(binPacking, newItem, position);
    169169    }
    170170

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/Instances/ThreeDInstanceParser.cs

    r15617 r15646  
    5858              PackingItem item = new PackingItem(width, height, length, Bin, weight, material) {
    5959                RotateEnabled = rotate == 0 ? false : true,
    60                 TiltEnabled = tilt == 0 ? false : true
     60                TiltEnabled = tilt == 0 ? false : true,
     61                IsStackabel = stack == 0 ? false : true
    6162              };
    6263              Items.Add(item);

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/Packer/BinPackerMinRSLeft.cs

    r15618 r15646  
    4545    #endregion
    4646
     47
     48
    4749    public BinPackerMinRSLeft() : base() { }
    4850
     51    /// <summary>
     52    /// This proportion of the residual space left to the item height is used for deciding if a not stackable item should be placed.
     53    /// </summary>
     54    private const double NOT_STACKABLE_RS_LEFT_TO_ITEM_HEIGHT_PROPORTION = 1.1;
    4955
    5056    public override IList<BinPacking3D> PackItems(Permutation sortedItems, PackingShape binShape, IList<PackingItem> items, ExtremePointCreationMethod epCreationMethod, ExtremePointPruningMethod epPruningMethod, bool useStackingConstraints) {
    … …  
    5763          BinPacking3D packingBin = new BinPacking3D(binShape);
    5864          PackRemainingItems(ref remainingIds, ref packingBin, workingItems, epCreationMethod, useStackingConstraints);
    59           packingList.Add(packingBin);
    60         }
    61       } catch(BinPacking3DException e) {
    62       }
    63      
     65          packingList.Add(packingBin);         
     66        }
     67      } catch (BinPacking3DException e) {
     68      }
     69
    6470      ExtremePointPruningFactory.CreatePruning().PruneExtremePoints(epPruningMethod, packingList);
     71
    6572      return packingList;
    6673    }
    … …  
    7683    protected void PackRemainingItems(ref IList<int> remainingIds, ref BinPacking3D packingBin, IList<PackingItem> items, ExtremePointCreationMethod epCreationMethod, bool useStackingConstraints) {
    7784      IExtremePointCreator extremePointCreator = ExtremePointCreatorFactory.CreateExtremePointCreator(epCreationMethod, useStackingConstraints);
     85      var remainingNotStackableItems = new List<int>();
    7886      foreach (var itemId in new List<int>(remainingIds)) {
    7987        var item = items[itemId];
    80         PackingPosition position = FindPackingPositionForItem(packingBin, item, useStackingConstraints);
    81         // if a valid packing position could be found, the current item can be added to the given bin
    82         if (position != null) {
    83           PackItem(packingBin, itemId, item, position, extremePointCreator, useStackingConstraints);
    84           remainingIds.Remove(itemId);
    85         }
    86       }
    87     }
    88 
    89    
     88
     89        // If an item is not stackable it should have a minimum waste of the residual space.
     90        // As long as there are stackable items left, put the non stackable items into a collection
     91        // and try to find positions where they don't waste too much space.
     92        // If there are no stackable items left the non stackable have to be treated as a stackable one.
     93        if (!item.IsStackabel && useStackingConstraints && remainingIds.Where(x => items[x].IsStackabel).Any()) {
     94          remainingNotStackableItems.Add(itemId);         
     95        } else {
     96          PackingPosition position = FindPackingPositionForItem(packingBin, item, useStackingConstraints);
     97          // if a valid packing position could be found, the current item can be added to the given bin
     98          if (position != null) {           
     99            PackItem(packingBin, itemId, item, position, extremePointCreator, useStackingConstraints);
     100            remainingIds.Remove(itemId);
     101          }
     102        }
     103
     104        // try to find a valid position for a non stackable item
     105        var stackableLeft = remainingIds.Where(x => items[x].IsStackabel).Any();
     106        foreach (var saId in new List<int>(remainingNotStackableItems)) {
     107          item = items[saId];
     108          PackingPosition position = null;
     109          if (stackableLeft) {
     110            position  = FindPackingPositionForNotStackableItem(packingBin, item, useStackingConstraints);
     111          } else {
     112            position = FindPackingPositionForItem(packingBin, item, useStackingConstraints);
     113          }
     114         
     115          if (position != null) {           
     116            PackItem(packingBin, saId, item, position, extremePointCreator, useStackingConstraints);
     117            remainingIds.Remove(saId);
     118            remainingNotStackableItems.Remove(saId);
     119          }
     120        }
     121       
     122      }
     123    }
     124
     125    /// <summary>
     126    /// Tries to find a valid position for a non stackable item.
     127    /// Positions will only be valid if the height difference of its residual space is smaller then the hight of the item.
     128    /// </summary>
     129    /// <param name="packingBin"></param>
     130    /// <param name="packingItem"></param>
     131    /// <param name="useStackingConstraints"></param>
     132    /// <returns></returns>
     133    private PackingPosition FindPackingPositionForNotStackableItem(BinPacking3D packingBin, PackingItem packingItem, bool useStackingConstraints) {
     134      if (!CheckItemDimensions(packingBin, packingItem)) {
     135        throw new BinPacking3DException($"The dimensions of the given item exceeds the bin dimensions. " +
     136          $"Bin: ({packingBin.BinShape.Width} {packingBin.BinShape.Depth} {packingBin.BinShape.Height})" +
     137          $"Item: ({packingItem.Width} {packingItem.Depth} {packingItem.Height})");
     138      }
     139      var rsds = CalculateResidalSpaceDifferences(packingBin, packingItem, useStackingConstraints).ToList();
     140      var rsd = rsds.Where(x => x != null && (x.Y / (double)x.Item.Height) < NOT_STACKABLE_RS_LEFT_TO_ITEM_HEIGHT_PROPORTION).OrderByDescending(x => x.Y % x.Item.Height).FirstOrDefault();
     141
     142      if (rsd == null) {
     143        return null;
     144      }
     145
     146      packingItem.Rotated = rsd.Item.Rotated;
     147      packingItem.Tilted = rsd.Item.Tilted;
     148      return rsd.Position;
     149    }
     150
    90151    protected override PackingPosition FindPackingPositionForItem(BinPacking3D packingBin, PackingItem packingItem, bool useStackingConstraints) {
    91152      if (!CheckItemDimensions(packingBin, packingItem)) {
    … …  
    95156      }
    96157
    97       var rsds = new SortedSet<ResidualSpaceDifference>();
    98 
    99       rsds.Add(FindResidualSpaceDifferenceForItem(packingBin, packingItem, useStackingConstraints, rotated: false, tilted: false));
    100 
    101       if (packingItem.TiltEnabled) {
    102         rsds.Add(FindResidualSpaceDifferenceForItem(packingBin, packingItem, useStackingConstraints, rotated: false, tilted: true));
    103       }
    104       if (packingItem.RotateEnabled) {
    105         rsds.Add(FindResidualSpaceDifferenceForItem(packingBin, packingItem, useStackingConstraints, rotated: true, tilted: false));
    106       }
    107       if (packingItem.RotateEnabled && packingItem.TiltEnabled) {
    108         rsds.Add(FindResidualSpaceDifferenceForItem(packingBin, packingItem, useStackingConstraints, rotated: true, tilted: true));
    109       }
    110 
    111       var rsd = rsds.Where(x => x != null).FirstOrDefault();
    112      
     158      var rsd = CalculateResidalSpaceDifferences(packingBin, packingItem, useStackingConstraints).Where(x => x != null).FirstOrDefault();
     159
    113160      if (rsd == null) {
    114161        return null;
    … …  
    120167    }
    121168
     169    /// <summary>
     170    ///
     171    /// </summary>
     172    /// <param name="packingBin"></param>
     173    /// <param name="packingItem"></param>
     174    /// <param name="useStackingConstraints"></param>
     175    /// <returns></returns>
     176    private SortedSet<ResidualSpaceDifference> CalculateResidalSpaceDifferences(BinPacking3D packingBin, PackingItem packingItem, bool useStackingConstraints) {
     177      var rsds = new SortedSet<ResidualSpaceDifference>();
     178
     179      rsds.Add(FindResidualSpaceDifferenceForItem(packingBin, packingItem, useStackingConstraints, rotated: false, tilted: false));
     180
     181      if (packingItem.TiltEnabled) {
     182        rsds.Add(FindResidualSpaceDifferenceForItem(packingBin, packingItem, useStackingConstraints, rotated: false, tilted: true));
     183      }
     184      if (packingItem.RotateEnabled) {
     185        rsds.Add(FindResidualSpaceDifferenceForItem(packingBin, packingItem, useStackingConstraints, rotated: true, tilted: false));
     186      }
     187      if (packingItem.RotateEnabled && packingItem.TiltEnabled) {
     188        rsds.Add(FindResidualSpaceDifferenceForItem(packingBin, packingItem, useStackingConstraints, rotated: true, tilted: true));
     189      }
     190      return rsds;
     191    }
     192
     193    /// <summary>
     194    ///
     195    /// </summary>
     196    /// <param name="packingBin"></param>
     197    /// <param name="packingItem"></param>
     198    /// <param name="useStackingConstraints"></param>
     199    /// <param name="rotated"></param>
     200    /// <param name="tilted"></param>
     201    /// <returns></returns>
    122202    protected ResidualSpaceDifference FindResidualSpaceDifferenceForItem(BinPacking3D packingBin, PackingItem packingItem, bool useStackingConstraints, bool rotated, bool tilted) {
    123203      PackingItem newItem = new PackingItem(packingItem) {
    … …  
    125205        Tilted = tilted
    126206      };
    127 
     207     
    128208      var rsds = new SortedSet<ResidualSpaceDifference>();
    129 
    130209      foreach (var ep in packingBin.ExtremePoints) {
    131210        var position = ep.Key;
    132         if (packingBin.IsPositionFeasible(newItem, position, useStackingConstraints)) {
    133           foreach (var rs in ep.Value) {
    134             var rsd = ResidualSpaceDifference.Create(position, newItem, rs);
    135             if (rsd != null) {
    136               rsds.Add(rsd);
    137             }
     211        foreach (var rs in ep.Value) {
     212          var rsd = ResidualSpaceDifference.Create(position, newItem, rs);
     213          if (rsd != null) {
     214            rsds.Add(rsd);
    138215          }
    139216        }
    140217      }
    141       return rsds.FirstOrDefault();
    142     }
    143 
     218      return rsds.Where(rsd => packingBin.IsPositionFeasible(rsd.Item, rsd.Position, useStackingConstraints)).FirstOrDefault();
     219    }
     220       
    144221    protected override bool CheckItemDimensions(BinPacking3D packingBin, PackingItem item) {
    145222      bool ok = false;
    … …  
    167244        OriginalWidth = width,
    168245        OriginalHeight = height,
    169         OriginalDepth =  depth
     246        OriginalDepth = depth
    170247      });
    171248    }
    … …  
    212289        if (x != 0) {
    213290          return x;
    214         } else if (y != 0 ) {
     291        } else if (y != 0) {
    215292          return y;
    216293        } else if (z != 0) {

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/PackingItem.cs

    r15617 r15646  
    4343      get { return (IFixedValueParameter<IntValue>)Parameters["Material"]; }
    4444    }
    45    
     45
    4646    public PackingShape TargetBin {
    4747      get { return TargetBinParameter.Value; }
    … …  
    6060
    6161
     62    public IFixedValueParameter<DoubleValue> SupportedWeightParameter {
     63      get { return (IFixedValueParameter<DoubleValue>)Parameters["SupportedWeight"]; }
     64    }
     65    public double SupportedWeight {
     66      get { return SupportedWeightParameter.Value.Value; }
     67      set { SupportedWeightParameter.Value.Value = value; }
     68    }
     69
     70    public IValueParameter<BoolValue> IsStackableParameter {
     71      get { return (IValueParameter<BoolValue>)Parameters["IsStackable"]; }
     72    }
     73
     74    /// <summary>
     75    /// Indicates that another item can be stacked on the current one.
     76    /// </summary>
     77    public bool IsStackabel {
     78      get { return IsStackableParameter.Value.Value; }
     79      set { IsStackableParameter.Value.Value = value; }
     80    }
     81
    6282    public IValueParameter<BoolValue> RotateEnabledParameter {
    6383      get { return (IValueParameter<BoolValue>)Parameters["RotateEnabled"]; }
    … …  
    7595      get { return (IValueParameter<BoolValue>)Parameters["Tilted"]; }
    7696    }
    77    
     97
    7898    /// <summary>
    7999    /// Enables that the current item can be rotated.
    … …  
    110130      set { TiltedParameter.Value.Value = value; }
    111131    }
    112    
     132
    113133    public IFixedValueParameter<IntValue> LoadSecuringHeightParameter {
    114134      get { return (IFixedValueParameter<IntValue>)Parameters["LoadSecuringHeight"]; }
    115135    }
    116    
     136
    117137    public IFixedValueParameter<IntValue> LoadSecuringWidthParameter {
    118138      get { return (IFixedValueParameter<IntValue>)Parameters["LoadSecuringWidth"]; }
    … …  
    195215          return WidthParameter.Value.Value;
    196216        }
    197       } 
     217      }
    198218    }
    199219
    … …  
    255275      set { DepthParameter.Value.Value = value; }
    256276    }
    257    
     277
    258278    public bool SupportsStacking(IPackingItem other) {
    259279      return ((other.Material < this.Material) || (other.Material.Equals(this.Material) && other.Weight <= this.Weight));
    … …  
    273293      Parameters.Add(new FixedValueParameter<DoubleValue>("Weight"));
    274294      Parameters.Add(new FixedValueParameter<IntValue>("Material"));
     295
     296      Parameters.Add(new FixedValueParameter<DoubleValue>("SupportedWeight"));     
     297
    275298      Parameters.Add(new FixedValueParameter<BoolValue>("RotateEnabled"));
    276299      Parameters.Add(new FixedValueParameter<BoolValue>("Rotated"));
    277300      Parameters.Add(new FixedValueParameter<BoolValue>("TiltEnabled"));
    278301      Parameters.Add(new FixedValueParameter<BoolValue>("Tilted"));
    279      
     302      Parameters.Add(new FixedValueParameter<BoolValue>("IsStackable"));
     303
    280304      Parameters.Add(new FixedValueParameter<IntValue>("LoadSecuringHeight"));
    281305      Parameters.Add(new FixedValueParameter<IntValue>("LoadSecuringWidth"));
    282306      Parameters.Add(new FixedValueParameter<IntValue>("LoadSecuringDepth"));
     307
     308      IsStackabel = true;
    283309
    284310      RegisterEvents();
    … …  
    294320
    295321    public PackingItem(int width, int height, int depth, PackingShape targetBin, double weight, int material)
    296       : this(width, height, depth, targetBin) {   
     322      : this(width, height, depth, targetBin) {
    297323      this.Weight = weight;
    298324      this.Material = material;
    299325    }
    300326
    301    
    302 
    303     public PackingItem(PackingItem packingItem)
    304       : this() {
     327
     328
     329    public PackingItem(PackingItem packingItem) : this() {
    305330      OriginalWidth = packingItem.OriginalWidth;
    306331      OriginalHeight = packingItem.OriginalHeight;
    307       OriginalDepth =  packingItem.OriginalDepth;
     332      OriginalDepth = packingItem.OriginalDepth;
    308333      TargetBin = (PackingShape)packingItem.TargetBin.Clone();
    309334      Weight = packingItem.Weight;
    … …  
    311336      Rotated = packingItem.Rotated;
    312337      Tilted = packingItem.Tilted;
     338      IsStackabel = packingItem.IsStackabel;
    313339
    314340      LoadSecuringDepth = packingItem.LoadSecuringDepth;
    … …  
    337363      return string.Format("CuboidPackingItem ({0}, {1}, {2}; weight={3}, mat={4})", this.Width, this.Height, this.Depth, this.Weight, this.Material);
    338364    }
    339    
     365
    340366  }
    341367}

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/Solution.cs

    r15617 r15646  
    2424using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
    2525using HeuristicLab.Problems.BinPacking;
     26using System;
    2627
    2728namespace HeuristicLab.Problems.BinPacking3D {
    … …  
    3940      return new Solution(this, cloner);
    4041    }
     42
     43    public bool IsBetterThan(Solution other, IEvaluator evaluator, bool problemMaximization = true) {
     44      var evaluatedThis = evaluator.Evaluate1(this);
     45
     46      if (double.IsInfinity(evaluatedThis.Item2) || double.IsNaN(evaluatedThis.Item2)) {
     47        return false;
     48      }
     49
     50      if (other == null) {
     51        return true;
     52      }
     53
     54      var evaluatedOther = evaluator.Evaluate1(other);
     55      if (evaluatedThis.Item1 < evaluatedOther.Item1) {
     56        return true;
     57      } else if (evaluatedThis.Item1 > evaluatedOther.Item1) {
     58        return false;
     59      }
     60     
     61      if (evaluatedThis.Item2 > evaluatedOther.Item2) {
     62        return true;
     63      }
     64      if (evaluatedThis.Item2 < evaluatedOther.Item2) {
     65        return false;
     66      }
     67
     68      if (evaluatedThis.Item3 > evaluatedOther.Item3) {
     69        return false;
     70      }
     71      return true;
     72
     73    }
    4174  }
    4275}

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/Sorting/IPackingItemClusteredSorter.cs

    r15618 r15646  
    3232
    3333    Permutation SortPackingItemsByMaterial(IList<PackingItem> items, PackingShape bin, double delta);
     34   
    3435  }
    3536}

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/Sorting/PackingItemAreaHeightSorter.cs

    r15618 r15646  
    3636    public Permutation SortPackingItemsByMaterial(IList<PackingItem> items, PackingShape bin) {
    3737      return items.SortByMaterialAreaHeight();
    38     }
     38    }   
    3939  }
    4040}

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/Sorting/PackingItemHeightVolumeSorter.cs

    r15618 r15646  
    3636    public Permutation SortPackingItemsByMaterial(IList<PackingItem> items, PackingShape bin) {
    3737      return items.SortByMaterialHeightVolume();
    38     }
     38    }   
    3939  }
    4040}

  • branches/2817-BinPackingSpeedup/HeuristicLab.Problems.BinPacking/3.3/3D/Sorting/PermutationPackingItemSorter.cs

    r15617 r15646  
    136136      return new Permutation(PermutationTypes.Absolute,
    137137                    items.Select((v, i) => new { Index = i, Item = v })
    138                          .OrderByDescending(x => x.Item.Material)
     138                         ./*OrderByDescending(x => x.Item.IsStackabel ? 1 : 0)
     139                         .*/OrderByDescending(x => x.Item.Material)
    139140                         .ThenByDescending(x => x.Item.Depth * x.Item.Width * x.Item.Height)
    140141                         .ThenByDescending(x => x.Item.Height)
    … …  
    150151      return new Permutation(PermutationTypes.Absolute,
    151152                    items.Select((v, i) => new { Index = i, Item = v })
    152                          .OrderByDescending(x => x.Item.Material)
     153                         ./*OrderByDescending(x => x.Item.IsStackabel ? 1 : 0)
     154                         .*/OrderByDescending(x => x.Item.Material)
    153155                         .ThenByDescending(x => x.Item.Height)
    154156                         .ThenByDescending(x => x.Item.Depth * x.Item.Width * x.Item.Height)
    … …  
    164166      return new Permutation(PermutationTypes.Absolute,
    165167                    items.Select((v, i) => new { Index = i, Item = v })
    166                          .OrderByDescending(x => x.Item.Material)
     168                         ./*OrderByDescending(x => x.Item.IsStackabel ? 1 : 0)
     169                         .*/OrderByDescending(x => x.Item.Material)
    167170                         .ThenByDescending(x => x.Item.Depth * x.Item.Width)
    168171                         .ThenByDescending(x => x.Item.Height)
    … …  
    178181      return new Permutation(PermutationTypes.Absolute,
    179182                    items.Select((v, i) => new { Index = i, Item = v })
    180                          .OrderByDescending(x => x.Item.Material)
     183                         ./*OrderByDescending(x => x.Item.IsStackabel ? 1 : 0)
     184                         .*/OrderByDescending(x => x.Item.Material)
    181185                         .ThenByDescending(x => x.Item.Height)
    182186                         .ThenByDescending(x => x.Item.Depth * x.Item.Width)
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