1 | #region License Information
|
---|
2 | /* HeuristicLab
|
---|
3 | * Copyright (C) 2002-2016 Joseph Helm and Heuristic and Evolutionary Algorithms Laboratory (HEAL)
|
---|
4 | *
|
---|
5 | * This file is part of HeuristicLab.
|
---|
6 | *
|
---|
7 | * HeuristicLab is free software: you can redistribute it and/or modify
|
---|
8 | * it under the terms of the GNU General Public License as published by
|
---|
9 | * the Free Software Foundation, either version 3 of the License, or
|
---|
10 | * (at your option) any later version.
|
---|
11 | *
|
---|
12 | * HeuristicLab is distributed in the hope that it will be useful,
|
---|
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
15 | * GNU General Public License for more details.
|
---|
16 | *
|
---|
17 | * You should have received a copy of the GNU General Public License
|
---|
18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
|
---|
19 | */
|
---|
20 | #endregion
|
---|
21 |
|
---|
22 | using System;
|
---|
23 | using System.Collections.Generic;
|
---|
24 | using System.Linq;
|
---|
25 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
|
---|
26 | using HeuristicLab.Core;
|
---|
27 | using HeuristicLab.Common;
|
---|
28 | using HeuristicLab.Problems.BinPacking;
|
---|
29 |
|
---|
30 | namespace HeuristicLab.Problems.BinPacking3D {
|
---|
31 | [Item("BinPacking3D", "Represents a single-bin packing for a 3D bin-packing problem.")]
|
---|
32 | [StorableClass]
|
---|
33 | public class BinPacking3D : BinPacking<PackingPosition, PackingShape, PackingItem> {
|
---|
34 |
|
---|
35 | [Storable]
|
---|
36 | public Dictionary<PackingPosition, Tuple<int, int, int>> ResidualSpace { get; protected set; }
|
---|
37 |
|
---|
38 | public BinPacking3D(PackingShape binShape)
|
---|
39 | : base(binShape) {
|
---|
40 | ResidualSpace = new Dictionary<PackingPosition, Tuple<int,int,int>>();
|
---|
41 | AddExtremePoint(binShape.Origin);
|
---|
42 | InitializeOccupationLayers();
|
---|
43 | }
|
---|
44 | [StorableConstructor]
|
---|
45 | protected BinPacking3D(bool deserializing) : base(deserializing) { }
|
---|
46 | protected BinPacking3D(BinPacking3D original, Cloner cloner)
|
---|
47 | : base(original, cloner) {
|
---|
48 | this.ResidualSpace = new Dictionary<PackingPosition, Tuple<int, int, int>>();
|
---|
49 | foreach (var o in original.ResidualSpace)
|
---|
50 | this.ResidualSpace.Add(cloner.Clone(o.Key), Tuple.Create(o.Value.Item1, o.Value.Item2, o.Value.Item3));
|
---|
51 | }
|
---|
52 | public override IDeepCloneable Clone(Cloner cloner) {
|
---|
53 | return new BinPacking3D(this, cloner);
|
---|
54 | }
|
---|
55 |
|
---|
56 |
|
---|
57 | [StorableHook(HookType.AfterDeserialization)]
|
---|
58 | private void AfterDeserialization() {
|
---|
59 | // BackwardsCompatibility3.3
|
---|
60 | #region Backwards compatible code, remove with 3.4
|
---|
61 | if (ResidualSpace == null)
|
---|
62 | ResidualSpace = new Dictionary<PackingPosition, Tuple<int, int, int>>();
|
---|
63 | #endregion
|
---|
64 | }
|
---|
65 |
|
---|
66 | public override void PackItem(int itemID, PackingItem item, PackingPosition position) {
|
---|
67 | ResidualSpace.Remove(position);
|
---|
68 | base.PackItem(itemID, item, position);
|
---|
69 | }
|
---|
70 |
|
---|
71 | protected override void GenerateNewExtremePointsForNewItem(PackingItem newItem, PackingPosition position) {
|
---|
72 | int newWidth = position.Rotated ? newItem.Depth : newItem.Width;
|
---|
73 | int newDepth = position.Rotated ? newItem.Width : newItem.Depth;
|
---|
74 |
|
---|
75 | //Find ExtremePoints beginning from sourcepointX
|
---|
76 | var sourcePointX = new PackingPosition(0, position.X + newWidth, position.Y, position.Z);
|
---|
77 | if (sourcePointX.X < BinShape.Width && sourcePointX.Y < BinShape.Height && sourcePointX.Z < BinShape.Depth) {
|
---|
78 | //Traversing down the y-axis
|
---|
79 | PackingPosition current = new PackingPosition(0, sourcePointX.X, sourcePointX.Y, sourcePointX.Z);
|
---|
80 | while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
|
---|
81 | current = PackingPosition.MoveDown(current);
|
---|
82 | }
|
---|
83 | AddExtremePoint((PackingPosition)current.Clone());
|
---|
84 | while (current.X > 0 && !IsPointOccupied(PackingPosition.MoveLeft(current))) {
|
---|
85 | current = PackingPosition.MoveLeft(current);
|
---|
86 | }
|
---|
87 | AddExtremePoint(current);
|
---|
88 |
|
---|
89 | //Traversing down the z-axis
|
---|
90 | current = new PackingPosition(0, sourcePointX.X, sourcePointX.Y, sourcePointX.Z);
|
---|
91 | while (current.Z > 0 && !IsPointOccupied(PackingPosition.MoveBack(current))) {
|
---|
92 | current = PackingPosition.MoveBack(current);
|
---|
93 | }
|
---|
94 | AddExtremePoint((PackingPosition)current.Clone());
|
---|
95 | while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
|
---|
96 | current = PackingPosition.MoveDown(current);
|
---|
97 | }
|
---|
98 | AddExtremePoint(current);
|
---|
99 | }
|
---|
100 |
|
---|
101 | //Find ExtremePoints beginning from sourcepointY
|
---|
102 | var sourcePointY = new PackingPosition(0, position.X, position.Y + newItem.Height, position.Z);
|
---|
103 | if (sourcePointY.X < BinShape.Width && sourcePointY.Y < BinShape.Height && sourcePointY.Z < BinShape.Depth) {
|
---|
104 | //Traversing down the x-axis
|
---|
105 | PackingPosition current = new PackingPosition(0, sourcePointY.X, sourcePointY.Y, sourcePointY.Z);
|
---|
106 | while (current.X > 0 && !IsPointOccupied(PackingPosition.MoveLeft(current))) {
|
---|
107 | current = PackingPosition.MoveLeft(current);
|
---|
108 | }
|
---|
109 | AddExtremePoint((PackingPosition)current.Clone());
|
---|
110 | while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
|
---|
111 | current = PackingPosition.MoveDown(current);
|
---|
112 | }
|
---|
113 | AddExtremePoint(current);
|
---|
114 |
|
---|
115 | //Traversing down the z-axis
|
---|
116 | current = new PackingPosition(0, sourcePointY.X, sourcePointY.Y, sourcePointY.Z);
|
---|
117 | while (current.Z > 0 && !IsPointOccupied(PackingPosition.MoveBack(current))) {
|
---|
118 | current = PackingPosition.MoveBack(current);
|
---|
119 | }
|
---|
120 | AddExtremePoint((PackingPosition)current.Clone());
|
---|
121 | while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
|
---|
122 | current = PackingPosition.MoveDown(current);
|
---|
123 | }
|
---|
124 | AddExtremePoint(current);
|
---|
125 | }
|
---|
126 |
|
---|
127 | //Find ExtremePoints beginning from sourcepointZ
|
---|
128 | var sourcePointZ = new PackingPosition(0, position.X, position.Y, position.Z + newDepth);
|
---|
129 | if (sourcePointZ.X < BinShape.Width && sourcePointZ.Y < BinShape.Height && sourcePointZ.Z < BinShape.Depth) {
|
---|
130 | //Traversing down the x-axis
|
---|
131 | PackingPosition current = new PackingPosition(0, sourcePointZ.X, sourcePointZ.Y, sourcePointZ.Z);
|
---|
132 | while (current.X > 0 && !IsPointOccupied(PackingPosition.MoveLeft(current))) {
|
---|
133 | current = PackingPosition.MoveLeft(current);
|
---|
134 | }
|
---|
135 | AddExtremePoint((PackingPosition)current.Clone());
|
---|
136 | while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
|
---|
137 | current = PackingPosition.MoveDown(current);
|
---|
138 | }
|
---|
139 | AddExtremePoint(current);
|
---|
140 |
|
---|
141 | //Traversing down the y-axis
|
---|
142 | current = new PackingPosition(0, sourcePointZ.X, sourcePointZ.Y, sourcePointZ.Z);
|
---|
143 | while (current.Y > 0 && !IsPointOccupied(PackingPosition.MoveDown(current))) {
|
---|
144 | current = PackingPosition.MoveDown(current);
|
---|
145 | }
|
---|
146 | AddExtremePoint((PackingPosition)current.Clone());
|
---|
147 | while (current.X > 0 && !IsPointOccupied(PackingPosition.MoveLeft(current))) {
|
---|
148 | current = PackingPosition.MoveLeft(current);
|
---|
149 | }
|
---|
150 | AddExtremePoint(current);
|
---|
151 | }
|
---|
152 | }
|
---|
153 |
|
---|
154 | private void AddExtremePoint(PackingPosition current) {
|
---|
155 | if (ExtremePoints.Add(current)) {
|
---|
156 | var tuple = Tuple.Create(BinShape.Width - current.X, BinShape.Height - current.Y, BinShape.Depth - current.Z);
|
---|
157 | ResidualSpace.Add(current, tuple);
|
---|
158 | }
|
---|
159 | }
|
---|
160 |
|
---|
161 | public override PackingPosition FindExtremePointForItem(PackingItem item, bool rotated, bool stackingConstraints) {
|
---|
162 | PackingItem newItem = new PackingItem(
|
---|
163 | rotated ? item.Depth : item.Width,
|
---|
164 | item.Height,
|
---|
165 | rotated ? item.Width : item.Depth,
|
---|
166 | item.TargetBin, item.Weight, item.Material);
|
---|
167 |
|
---|
168 | var ep = ExtremePoints.Where(x => IsPositionFeasible(newItem, x, stackingConstraints)).FirstOrDefault();
|
---|
169 | if (ep != null) {
|
---|
170 | var result = new PackingPosition(ep.AssignedBin, ep.X, ep.Y, ep.Z, rotated);
|
---|
171 | return result;
|
---|
172 | }
|
---|
173 | return null;
|
---|
174 | }
|
---|
175 |
|
---|
176 | public override bool IsPositionFeasible(PackingItem item, PackingPosition position, bool stackingConstraints) {
|
---|
177 | var feasible = base.IsPositionFeasible(item, position, stackingConstraints);
|
---|
178 | return feasible
|
---|
179 | && IsSupportedByAtLeastOnePoint(item, position)
|
---|
180 | && (!stackingConstraints || (IsStaticStable(item, position) && IsWeightSupported(item, position)));
|
---|
181 | }
|
---|
182 |
|
---|
183 | public override PackingPosition FindPositionBySliding(PackingItem item, bool rotated, bool stackingConstraints) {
|
---|
184 | //Starting-position at upper right corner (=left bottom point of item-rectangle is at position item.width,item.height)
|
---|
185 | PackingPosition currentPosition = new PackingPosition(0,
|
---|
186 | BinShape.Width - (rotated ? item.Depth : item.Width),
|
---|
187 | BinShape.Height - item.Height,
|
---|
188 | BinShape.Depth - (rotated ? item.Width : item.Depth), rotated);
|
---|
189 | //Slide the item as far as possible to the bottom
|
---|
190 | while (IsPositionFeasible(item, PackingPosition.MoveDown(currentPosition), stackingConstraints)
|
---|
191 | || IsPositionFeasible(item, PackingPosition.MoveLeft(currentPosition), stackingConstraints)
|
---|
192 | || IsPositionFeasible(item, PackingPosition.MoveBack(currentPosition), stackingConstraints)) {
|
---|
193 | //Slide the item as far as possible to the left
|
---|
194 | while (IsPositionFeasible(item, PackingPosition.MoveLeft(currentPosition), stackingConstraints)
|
---|
195 | || IsPositionFeasible(item, PackingPosition.MoveBack(currentPosition), stackingConstraints)) {
|
---|
196 | //Slide the item as far as possible to the back
|
---|
197 | while (IsPositionFeasible(item, PackingPosition.MoveBack(currentPosition), stackingConstraints)) {
|
---|
198 | currentPosition = PackingPosition.MoveBack(currentPosition);
|
---|
199 | }
|
---|
200 | if (IsPositionFeasible(item, PackingPosition.MoveLeft(currentPosition), stackingConstraints))
|
---|
201 | currentPosition = PackingPosition.MoveLeft(currentPosition);
|
---|
202 | }
|
---|
203 | if (IsPositionFeasible(item, PackingPosition.MoveDown(currentPosition), stackingConstraints))
|
---|
204 | currentPosition = PackingPosition.MoveDown(currentPosition);
|
---|
205 | }
|
---|
206 |
|
---|
207 | return IsPositionFeasible(item, currentPosition, stackingConstraints) ? currentPosition : null;
|
---|
208 | }
|
---|
209 |
|
---|
210 | public override void SlidingBasedPacking(ref IList<int> sequence, IList<PackingItem> items, bool stackingConstraints) {
|
---|
211 | var temp = new List<int>(sequence);
|
---|
212 | for (int i = 0; i < temp.Count; i++) {
|
---|
213 | var item = items[temp[i]];
|
---|
214 | var position = FindPositionBySliding(item, false, stackingConstraints);
|
---|
215 | if (position != null) {
|
---|
216 | PackItem(temp[i], item, position);
|
---|
217 | sequence.Remove(temp[i]);
|
---|
218 | }
|
---|
219 | }
|
---|
220 | }
|
---|
221 | public override void SlidingBasedPacking(ref IList<int> sequence, IList<PackingItem> items, Dictionary<int, bool> rotationArray, bool stackingConstraints) {
|
---|
222 | var temp = new List<int>(sequence);
|
---|
223 | for (int i = 0; i < temp.Count; i++) {
|
---|
224 | var item = items[temp[i]];
|
---|
225 | var position = FindPositionBySliding(item, rotationArray[i], stackingConstraints);
|
---|
226 | if (position != null) {
|
---|
227 | PackItem(temp[i], item, position);
|
---|
228 | sequence.Remove(temp[i]);
|
---|
229 | }
|
---|
230 | }
|
---|
231 | }
|
---|
232 | public override void ExtremePointBasedPacking(ref IList<int> sequence, IList<PackingItem> items, bool stackingConstraints) {
|
---|
233 | var temp = new List<int>(sequence);
|
---|
234 | foreach (int itemID in temp) {
|
---|
235 | var item = items[itemID];
|
---|
236 | var positionFound = FindExtremePointForItem(item, false, stackingConstraints);
|
---|
237 | if (positionFound != null) {
|
---|
238 | PackItem(itemID, item, positionFound);
|
---|
239 | if (Items.Count > 1)
|
---|
240 | UpdateResidualSpace(item, positionFound);
|
---|
241 | sequence.Remove(itemID);
|
---|
242 | }
|
---|
243 | }
|
---|
244 | }
|
---|
245 | public override void ExtremePointBasedPacking(ref IList<int> sequence, IList<PackingItem> items, bool stackingConstraints, Dictionary<int, bool> rotationArray) {
|
---|
246 | var temp = new List<int>(sequence);
|
---|
247 | foreach (int itemID in temp) {
|
---|
248 | var item = items[itemID];
|
---|
249 | var positionFound = FindExtremePointForItem(item, rotationArray[itemID], stackingConstraints);
|
---|
250 | if (positionFound != null) {
|
---|
251 | PackItem(itemID, item, positionFound);
|
---|
252 | sequence.Remove(itemID);
|
---|
253 | }
|
---|
254 | }
|
---|
255 | }
|
---|
256 | public override int ShortestPossibleSideFromPoint(PackingPosition position) {
|
---|
257 |
|
---|
258 | int shortestSide = int.MaxValue;
|
---|
259 | int width = BinShape.Width;
|
---|
260 | int height = BinShape.Height;
|
---|
261 | int depth = BinShape.Depth;
|
---|
262 |
|
---|
263 | if (position.X >= width || position.Y >= height || position.Z >= depth)
|
---|
264 | return shortestSide;
|
---|
265 |
|
---|
266 | PackingPosition current = new PackingPosition(0, position.X, position.Y, position.Z);
|
---|
267 | while (current.X < width && IsPointOccupied(current)) { current = PackingPosition.MoveRight(current); }
|
---|
268 | if (current.X - position.X < shortestSide)
|
---|
269 | shortestSide = current.X - position.X;
|
---|
270 |
|
---|
271 |
|
---|
272 | current = new PackingPosition(0, position.X, position.Y, position.Z);
|
---|
273 | while (current.Y < height && IsPointOccupied(current)) { current = PackingPosition.MoveUp(current); }
|
---|
274 | if (current.Y - position.Y < shortestSide)
|
---|
275 | shortestSide = current.Y - position.Y;
|
---|
276 |
|
---|
277 |
|
---|
278 | current = new PackingPosition(0, position.X, position.Y, position.Z);
|
---|
279 | while (current.Z < depth && IsPointOccupied(current)) { current = PackingPosition.MoveFront(current); }
|
---|
280 | if (current.Z - position.Z < shortestSide)
|
---|
281 | shortestSide = current.Z - position.Z;
|
---|
282 |
|
---|
283 | return shortestSide;
|
---|
284 | }
|
---|
285 | public override bool IsStaticStable(PackingItem item, PackingPosition position) {
|
---|
286 | //Static stability is given, if item is placed on the ground
|
---|
287 | if (position.Y == 0)
|
---|
288 | return true;
|
---|
289 |
|
---|
290 | if (IsPointOccupied(new PackingPosition(0, position.X, position.Y - 1, position.Z))
|
---|
291 | && IsPointOccupied(new PackingPosition(0, position.X + item.Width - 1, position.Y - 1, position.Z))
|
---|
292 | && IsPointOccupied(new PackingPosition(0, position.X, position.Y - 1, position.Z + item.Depth - 1))
|
---|
293 | && IsPointOccupied(new PackingPosition(0, position.X + item.Width - 1, position.Y - 1, position.Z + item.Depth - 1)))
|
---|
294 | return true;
|
---|
295 |
|
---|
296 | return false;
|
---|
297 | }
|
---|
298 |
|
---|
299 |
|
---|
300 | public bool IsSupportedByAtLeastOnePoint(PackingItem item, PackingPosition position) {
|
---|
301 | if (position.Y == 0)
|
---|
302 | return true;
|
---|
303 |
|
---|
304 | int y = position.Y - 1;
|
---|
305 | for (int x = position.X; x < position.X + item.Width; x++)
|
---|
306 | for (int z = position.Z; z < position.Z + item.Depth; z++)
|
---|
307 | if (IsPointOccupied(new PackingPosition(0, x, y, z)))
|
---|
308 | return true;
|
---|
309 |
|
---|
310 | return false;
|
---|
311 | }
|
---|
312 | public bool IsWeightSupported(PackingItem item, PackingPosition ep) {
|
---|
313 | if (ep.Y == 0)
|
---|
314 | return true;
|
---|
315 |
|
---|
316 | if (Items[PointOccupation(new PackingPosition(0, ep.X, ep.Y - 1, ep.Z))].SupportsStacking(item)
|
---|
317 | && Items[PointOccupation(new PackingPosition(0, ep.X + item.Width - 1, ep.Y - 1, ep.Z))].SupportsStacking(item)
|
---|
318 | && Items[PointOccupation(new PackingPosition(0, ep.X, ep.Y - 1, ep.Z + item.Depth - 1))].SupportsStacking(item)
|
---|
319 | && Items[PointOccupation(new PackingPosition(0, ep.X + item.Width - 1, ep.Y - 1, ep.Z + item.Depth - 1))].SupportsStacking(item))
|
---|
320 | return true;
|
---|
321 |
|
---|
322 | return false;
|
---|
323 | }
|
---|
324 |
|
---|
325 | protected override void InitializeOccupationLayers() {
|
---|
326 | for (int i = 0; i * 10 <= BinShape.Depth; i += 1) {
|
---|
327 | OccupationLayers[i] = new List<int>();
|
---|
328 | }
|
---|
329 | }
|
---|
330 | protected override void AddNewItemToOccupationLayers(int itemID, PackingItem item, PackingPosition position) {
|
---|
331 | int z1 = position.Z / 10;
|
---|
332 | int z2 = (position.Z + (position.Rotated ? item.Width : item.Depth)) / 10;
|
---|
333 |
|
---|
334 | for (int i = z1; i <= z2; i++)
|
---|
335 | OccupationLayers[i].Add(itemID);
|
---|
336 | }
|
---|
337 | protected override List<int> GetLayerItemIDs(PackingPosition position) {
|
---|
338 | return OccupationLayers[position.Z / 10];
|
---|
339 | }
|
---|
340 | protected override List<int> GetLayerItemIDs(PackingItem item, PackingPosition position) {
|
---|
341 | List<int> result = new List<int>();
|
---|
342 | int z1 = position.Z / 10;
|
---|
343 | int z2 = (position.Z + (position.Rotated ? item.Width : item.Depth)) / 10;
|
---|
344 |
|
---|
345 | for (int i = z1; i <= z2; i++)
|
---|
346 | result.AddRange(OccupationLayers[i]);
|
---|
347 | return result;
|
---|
348 | }
|
---|
349 |
|
---|
350 | public void UpdateResidualSpace(PackingItem item, PackingPosition pos) {
|
---|
351 | foreach (var ep in ExtremePoints) {
|
---|
352 | if (ep.Z >= pos.Z && ep.Z <= pos.Z + item.Depth) {
|
---|
353 | if (ep.X <= pos.X && ep.Y > pos.Y && ep.Y < pos.Y + item.Height) {
|
---|
354 | var diff = pos.X - ep.X;
|
---|
355 | var newRSX = ResidualSpace[ep].Item1 < diff ? ResidualSpace[ep].Item1 : diff;
|
---|
356 | ResidualSpace[ep] = Tuple.Create(newRSX, ResidualSpace[ep].Item2, ResidualSpace[ep].Item3);
|
---|
357 | }
|
---|
358 | if (ep.Y <= pos.Y && ep.X > pos.X && ep.X < pos.X + item.Width) {
|
---|
359 | var diff = pos.Y - ep.Y;
|
---|
360 | var newRSY = ResidualSpace[ep].Item2 < diff ? ResidualSpace[ep].Item2 : diff;
|
---|
361 | ResidualSpace[ep] = Tuple.Create(ResidualSpace[ep].Item1, newRSY, ResidualSpace[ep].Item3);
|
---|
362 | }
|
---|
363 | }
|
---|
364 | if (ep.Z <= pos.Z &&
|
---|
365 | ep.Y > pos.Y && ep.Y < pos.Y + item.Height &&
|
---|
366 | ep.X > pos.X && ep.X < pos.X + item.Width) {
|
---|
367 | var diff = pos.Z - ep.Z;
|
---|
368 | var newRSZ = ResidualSpace[ep].Item3 < diff ? ResidualSpace[ep].Item3 : diff;
|
---|
369 | ResidualSpace[ep] = Tuple.Create(ResidualSpace[ep].Item1, ResidualSpace[ep].Item2, newRSZ);
|
---|
370 | }
|
---|
371 | }
|
---|
372 | return;
|
---|
373 | }
|
---|
374 | }
|
---|
375 | } |
---|