Changeset 14976 for branches/BinPackingExtension/HeuristicLab.Problems.BinPacking/3.3/3D/BinPacking3D.cs

Timestamp:

05/12/17 14:10:55 (7 years ago)

Author:

dsouravl

Message:

#2762: worked on best fit heuristics

File:

• branches/BinPackingExtension/HeuristicLab.Problems.BinPacking/3.3/3D/BinPacking3D.cs (modified) (13 diffs)

branches/BinPackingExtension/HeuristicLab.Problems.BinPacking/3.3/3D/BinPacking3D.cs

@@ -20 +20 @@
 #endregion
 
+using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -35 +36 @@
       : base(binShape) {
       ExtremePoints = new SortedSet<PackingPosition>();
-      ExtremePoints.Add(binShape.Origin);
+      ResidualSpace = new Dictionary<PackingPosition, Tuple<int,int,int>>();
+      AddExtremePoint(binShape.Origin);
       InitializeOccupationLayers();
     }
@@ -43 +45 @@
       : base(original, cloner) {
       this.ExtremePoints = new SortedSet<PackingPosition>(original.ExtremePoints.Select(p => cloner.Clone(p)));
+      this.ResidualSpace = new Dictionary<PackingPosition, Tuple<int, int, int>>();
+      foreach (var o in original.ResidualSpace)
+        this.ResidualSpace.Add(cloner.Clone(o.Key), Tuple.Create(o.Value.Item1, o.Value.Item2, o.Value.Item3));
     }
     public override IDeepCloneable Clone(Cloner cloner) {
@@ -60 +65 @@
           current = PackingPosition.MoveDown(current);
         }
-        ExtremePoints.Add((PackingPosition)current.Clone());
+        AddExtremePoint((PackingPosition)current.Clone());
         while (current.X > 0 && !IsPointOccupied(PackingPosition.MoveLeft(current))) {
           current = PackingPosition.MoveLeft(current);
         }
-        ExtremePoints.Add(current);
+        AddExtremePoint(current);
 
         //Traversing down the z-axis
@@ -71 +76 @@
           current = PackingPosition.MoveBack(current);
         }
-        ExtremePoints.Add((PackingPosition)current.Clone());
-        while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
-          current = PackingPosition.MoveDown(current);
-        }
-        ExtremePoints.Add(current);
+        AddExtremePoint((PackingPosition)current.Clone());
+        while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
+          current = PackingPosition.MoveDown(current);
+        }
+        AddExtremePoint(current);
       }
 
@@ -86 +91 @@
           current = PackingPosition.MoveLeft(current);
         }
-        ExtremePoints.Add((PackingPosition)current.Clone());
-        while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
-          current = PackingPosition.MoveDown(current);
-        }
-        ExtremePoints.Add(current);
+        AddExtremePoint((PackingPosition)current.Clone());
+        while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
+          current = PackingPosition.MoveDown(current);
+        }
+        AddExtremePoint(current);
 
         //Traversing down the z-axis
@@ -97 +102 @@
           current = PackingPosition.MoveBack(current);
         }
-        ExtremePoints.Add((PackingPosition)current.Clone());
-        while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
-          current = PackingPosition.MoveDown(current);
-        }
-        ExtremePoints.Add(current);
+        AddExtremePoint((PackingPosition)current.Clone());
+        while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
+          current = PackingPosition.MoveDown(current);
+        }
+        AddExtremePoint(current);
       }
 
@@ -112 +117 @@
           current = PackingPosition.MoveLeft(current);
         }
-        ExtremePoints.Add((PackingPosition)current.Clone());
-        while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
-          current = PackingPosition.MoveDown(current);
-        }
-        ExtremePoints.Add(current);
+        AddExtremePoint((PackingPosition)current.Clone());
+        while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
+          current = PackingPosition.MoveDown(current);
+        }
+        AddExtremePoint(current);
 
         //Traversing down the y-axis
@@ -123 +128 @@
           current = PackingPosition.MoveDown(current);
         }
-        ExtremePoints.Add((PackingPosition)current.Clone());
+        AddExtremePoint((PackingPosition)current.Clone());
         while (current.X > 0 && !IsPointOccupied(PackingPosition.MoveLeft(current))) {
           current = PackingPosition.MoveLeft(current);
         }
-        ExtremePoints.Add(current);
+        AddExtremePoint(current);
+      }
+    }
+
+    private void AddExtremePoint(PackingPosition current) {
+      if (ExtremePoints.Add(current)) {
+        var tuple = Tuple.Create(BinShape.Width - current.X, BinShape.Height - current.Y, BinShape.Depth - current.Z);
+        ResidualSpace.Add(current, tuple);
       }
     }
@@ -137 +149 @@
         item.Height,
         rotated ? item.Width : item.Depth,
-        item.TargetBin);
+        item.TargetBin, item.Weight, item.Material);
 
       int epIndex = 0;
@@ -212 +224 @@
         if (positionFound != null) {
           PackItem(itemID, item, positionFound);
+          if (!(positionFound.X == 0 && positionFound.Y == 0 && positionFound.Z == 0)) {
+            UpdateResidualSpace(item, positionFound);
+          }
           sequence.Remove(itemID);
         }
       }
+    }
+    public override bool ExtremePointBasedPacking(int itemID, IList<PackingItem> items, bool stackingConstraints) {
+      var item = items[itemID];
+      var positionFound = FindExtremePointForItem(item, false, stackingConstraints);
+      if (positionFound != null) {
+       PackItem(itemID, item, positionFound);
+       return true;
+      }
+      return false;
     }
     public override void ExtremePointBasedPacking(ref IList<int> sequence, IList<PackingItem> items, bool stackingConstraints, Dictionary<int, bool> rotationArray) {
@@ -227 +251 @@
       }
     }
-
     public override int ShortestPossibleSideFromPoint(PackingPosition position) {
 
@@ -320 +343 @@
       for (int i = z1; i <= z2; i++)
         result.AddRange(OccupationLayers[i]);
-
       return result;
     }
+    
+    public void UpdateResidualSpace(PackingItem item, PackingPosition pos) {
+      foreach (var ep in ExtremePoints) {
+        if (ep.Z >= pos.Z && ep.Z <= pos.Z + item.Depth) {
+          if (ep.X <= pos.X && ep.Y >= pos.Y && ep.Y <= pos.Y + item.Height) {
+            var diff = pos.X - ep.X;
+            var newRSX = ResidualSpace[ep].Item1 < diff ? ResidualSpace[ep].Item1 : diff;
+            ResidualSpace[ep] = Tuple.Create(newRSX, ResidualSpace[ep].Item2, ResidualSpace[ep].Item3);
+          }
+          if (ep.Y <= pos.Y && ep.X >= pos.X && ep.X <= pos.X + item.Width) {
+            var diff = pos.Y - ep.Y;
+            var newRSY = ResidualSpace[ep].Item2 < diff ? ResidualSpace[ep].Item2 : diff;
+            ResidualSpace[ep] = Tuple.Create(ResidualSpace[ep].Item1, newRSY, ResidualSpace[ep].Item3);
+          }
+        }
+        if (ep.Z <= pos.Z && 
+          ep.Y >= pos.Y && ep.Y <= pos.Y + item.Height &&
+          ep.X >= pos.X && ep.X <= pos.X + item.Width) {
+            var diff = pos.Z - ep.Z;
+            var newRSZ = ResidualSpace[ep].Item3 < diff ? ResidualSpace[ep].Item3 : diff;
+            ResidualSpace[ep] = Tuple.Create(ResidualSpace[ep].Item1, ResidualSpace[ep].Item2, newRSZ);
+        }
+      }
+      return;
+    }
+    public int GetResidualSpace(PackingItem item, PackingPosition ep) {
+      return ((ResidualSpace[ep].Item1 - item.Width) +
+          (ResidualSpace[ep].Item2 - item.Height) +
+          (ResidualSpace[ep].Item3 - item.Depth));
+      }
+    }
   }
-
-}