1 | #region License Information
|
---|
2 | /* HeuristicLab
|
---|
3 | * Copyright (C) 2002-2016 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 |
|
---|
23 | using System;
|
---|
24 | using System.Collections.Generic;
|
---|
25 | using System.Diagnostics.Contracts;
|
---|
26 | using System.IO;
|
---|
27 | using System.Linq;
|
---|
28 | using HeuristicLab.Core;
|
---|
29 | using HeuristicLab.Problems.Instances;
|
---|
30 | using HeuristicLab.Random;
|
---|
31 |
|
---|
32 | namespace HeuristicLab.Problems.BinPacking2D {
|
---|
33 | // make sure that for each class we have a separate entry in the problem instance providers
|
---|
34 | public class RandomInstanceClass1Provider : RandomInstanceProvider {
|
---|
35 | public RandomInstanceClass1Provider() : base() {
|
---|
36 | @class = 1;
|
---|
37 | binWidth = binHeight = 10;
|
---|
38 | }
|
---|
39 | protected override void SampleItemParameters(IRandom rand, out int w, out int h) {
|
---|
40 | w = rand.Next(1, 11);
|
---|
41 | h = rand.Next(1, 11);
|
---|
42 | }
|
---|
43 | }
|
---|
44 | public class RandomInstanceClass2Provider : RandomInstanceProvider {
|
---|
45 | public RandomInstanceClass2Provider() : base() {
|
---|
46 | @class = 2;
|
---|
47 | binWidth = binHeight = 30;
|
---|
48 | }
|
---|
49 | protected override void SampleItemParameters(IRandom rand, out int w, out int h) {
|
---|
50 | w = rand.Next(1, 11);
|
---|
51 | h = rand.Next(1, 11);
|
---|
52 | }
|
---|
53 | }
|
---|
54 | public class RandomInstanceClass3Provider : RandomInstanceProvider {
|
---|
55 | public RandomInstanceClass3Provider() : base() {
|
---|
56 | @class = 3;
|
---|
57 | binWidth = binHeight = 40;
|
---|
58 | }
|
---|
59 | protected override void SampleItemParameters(IRandom rand, out int w, out int h) {
|
---|
60 | w = rand.Next(1, 36);
|
---|
61 | h = rand.Next(1, 36);
|
---|
62 | }
|
---|
63 | }
|
---|
64 |
|
---|
65 | public class RandomInstanceClass4Provider : RandomInstanceProvider {
|
---|
66 | public RandomInstanceClass4Provider() : base() {
|
---|
67 | @class = 4;
|
---|
68 | binWidth = binHeight = 100;
|
---|
69 | }
|
---|
70 | protected override void SampleItemParameters(IRandom rand, out int w, out int h) {
|
---|
71 | w = rand.Next(1, 36);
|
---|
72 | h = rand.Next(1, 36);
|
---|
73 | }
|
---|
74 | }
|
---|
75 | public class RandomInstanceClass5Provider : RandomInstanceProvider {
|
---|
76 | public RandomInstanceClass5Provider() : base() {
|
---|
77 | @class = 5;
|
---|
78 | binWidth = binHeight = 100;
|
---|
79 | }
|
---|
80 | protected override void SampleItemParameters(IRandom rand, out int w, out int h) {
|
---|
81 | w = rand.Next(1, 101);
|
---|
82 | h = rand.Next(1, 101);
|
---|
83 | }
|
---|
84 | }
|
---|
85 | public class RandomInstanceClass6Provider : RandomInstanceProvider {
|
---|
86 | public RandomInstanceClass6Provider() : base() {
|
---|
87 | @class = 6;
|
---|
88 | binWidth = binHeight = 300;
|
---|
89 | }
|
---|
90 | protected override void SampleItemParameters(IRandom rand, out int w, out int h) {
|
---|
91 | w = rand.Next(1, 101);
|
---|
92 | h = rand.Next(1, 101);
|
---|
93 | }
|
---|
94 | }
|
---|
95 | public class RandomInstanceClass7Provider : RandomInstanceProvider {
|
---|
96 | public RandomInstanceClass7Provider() : base() { @class = 7; binWidth = binHeight = 100; }
|
---|
97 | }
|
---|
98 | public class RandomInstanceClass8Provider : RandomInstanceProvider {
|
---|
99 | public RandomInstanceClass8Provider() : base() { @class = 8; binWidth = binHeight = 100; }
|
---|
100 | }
|
---|
101 | public class RandomInstanceClass9Provider : RandomInstanceProvider {
|
---|
102 | public RandomInstanceClass9Provider() : base() { @class = 9; binWidth = binHeight = 100; }
|
---|
103 | }
|
---|
104 | public class RandomInstanceClass10Provider : RandomInstanceProvider {
|
---|
105 | public RandomInstanceClass10Provider() : base() { @class = 10; binWidth = binHeight = 100; }
|
---|
106 | }
|
---|
107 | public abstract class RandomInstanceProvider : ProblemInstanceProvider<BPPData>, IProblemInstanceProvider<BPPData> {
|
---|
108 |
|
---|
109 | protected int @class;
|
---|
110 | protected int binWidth, binHeight;
|
---|
111 |
|
---|
112 | public override string Name {
|
---|
113 | get { return string.Format("Lodi, Martelli, Vigo (class={0})", @class); }
|
---|
114 | }
|
---|
115 |
|
---|
116 | public override string Description {
|
---|
117 | get { return "Randomly generated 2d bin packing problems as described in Lodi, Martello, and Vigo. 'Heuristic and metaheuristic approaches for a class of two-dimensional bin packing problems.' INFORMS Journal on Computing 11.4 (1999): 345-357."; }
|
---|
118 | }
|
---|
119 |
|
---|
120 | public override Uri WebLink {
|
---|
121 | get { return null; }
|
---|
122 | }
|
---|
123 |
|
---|
124 | public override string ReferencePublication {
|
---|
125 | get { return "Lodi, Martello, and Vigo. 'Heuristic and metaheuristic approaches for a class of two-dimensional bin packing problems.' INFORMS Journal on Computing 11.4 (1999): 345-357."; }
|
---|
126 | }
|
---|
127 |
|
---|
128 | public RandomInstanceProvider() : base() { }
|
---|
129 |
|
---|
130 | public override IEnumerable<IDataDescriptor> GetDataDescriptors() {
|
---|
131 | // 10 classes
|
---|
132 | var rand = new MersenneTwister(1234); // fixed seed to makes sure that instances are always the same
|
---|
133 | foreach (int numItems in new int[] { 20, 40, 60, 80, 100 }) {
|
---|
134 | // get class parameters
|
---|
135 | // generate 30 different instances for each class
|
---|
136 | foreach (int instance in Enumerable.Range(1, 30)) {
|
---|
137 | string name = string.Format("n={0}-id={1:00} (class={2})", numItems, instance, @class);
|
---|
138 | var dd = new RandomDataDescriptor(name, name, numItems, seed: rand.Next());
|
---|
139 | yield return dd;
|
---|
140 | }
|
---|
141 | }
|
---|
142 | }
|
---|
143 |
|
---|
144 | public override BPPData LoadData(IDataDescriptor dd) {
|
---|
145 | var randDd = dd as RandomDataDescriptor;
|
---|
146 | if (randDd == null) throw new NotSupportedException("Cannot load data descriptor " + dd);
|
---|
147 |
|
---|
148 | var data = new BPPData() {
|
---|
149 | BinShape = new PackingShape(binWidth, binHeight),
|
---|
150 | Items = new PackingItem[randDd.NumItems]
|
---|
151 | };
|
---|
152 | var instanceRand = new MersenneTwister((uint)randDd.Seed);
|
---|
153 | for (int i = 0; i < randDd.NumItems; i++) {
|
---|
154 | int w, h;
|
---|
155 | SampleItemParameters(instanceRand, out w, out h);
|
---|
156 | data.Items[i] = new PackingItem(w, h, data.BinShape);
|
---|
157 | }
|
---|
158 | return data;
|
---|
159 | }
|
---|
160 |
|
---|
161 | // default implementation for class 7 .. 10
|
---|
162 | protected virtual void SampleItemParameters(IRandom rand, out int w, out int h) {
|
---|
163 | // for classes 1 - 5
|
---|
164 | Contract.Assert(@class >= 7 && @class <= 10);
|
---|
165 | var weights = new double[] { 0.1, 0.1, 0.1, 0.1 };
|
---|
166 | weights[@class - 7] = 0.7;
|
---|
167 | var type = Enumerable.Range(1, 4).SampleProportional(rand, 1, weights).First();
|
---|
168 |
|
---|
169 | int minW, maxW;
|
---|
170 | int minH, maxH;
|
---|
171 | GetItemParameters(type, rand, binWidth, binHeight,
|
---|
172 | out minW, out maxW, out minH, out maxH);
|
---|
173 |
|
---|
174 | w = rand.Next(minW, maxW + 1);
|
---|
175 | h = rand.Next(minH, maxH + 1);
|
---|
176 | }
|
---|
177 |
|
---|
178 | private void GetItemParameters(int type, IRandom rand,
|
---|
179 | int w, int h,
|
---|
180 | out int minW, out int maxW, out int minH, out int maxH) {
|
---|
181 | switch (type) {
|
---|
182 | case 1: {
|
---|
183 | minW = w * 2 / 3; maxW = w; // integer division on purpose (see paper)
|
---|
184 | minH = 1; maxH = h / 2;
|
---|
185 | break;
|
---|
186 | }
|
---|
187 | case 2: {
|
---|
188 | minW = 1; maxW = w / 2;
|
---|
189 | minH = h * 2 / 3; maxH = h;
|
---|
190 | break;
|
---|
191 | }
|
---|
192 | case 3: {
|
---|
193 | minW = w / 2; maxW = w;
|
---|
194 | minH = h / 2; maxH = h;
|
---|
195 | break;
|
---|
196 | }
|
---|
197 | case 4: {
|
---|
198 | minW = 1; maxW = w / 2;
|
---|
199 | minH = 1; maxH = h / 2;
|
---|
200 | break;
|
---|
201 | }
|
---|
202 | default: {
|
---|
203 | throw new InvalidProgramException();
|
---|
204 | }
|
---|
205 | }
|
---|
206 | }
|
---|
207 |
|
---|
208 | public override bool CanImportData {
|
---|
209 | get { return false; }
|
---|
210 | }
|
---|
211 | public override BPPData ImportData(string path) {
|
---|
212 | throw new NotSupportedException();
|
---|
213 | }
|
---|
214 |
|
---|
215 | public override bool CanExportData {
|
---|
216 | get { return true; }
|
---|
217 | }
|
---|
218 |
|
---|
219 | public override void ExportData(BPPData instance, string file) {
|
---|
220 | using (Stream stream = new FileStream(file, FileMode.OpenOrCreate, FileAccess.Write)) {
|
---|
221 | Export(instance, stream);
|
---|
222 | }
|
---|
223 | }
|
---|
224 | public static void Export(BPPData instance, Stream stream) {
|
---|
225 |
|
---|
226 | using (var writer = new StreamWriter(stream)) {
|
---|
227 | writer.WriteLine(String.Format("{0,-5} {1,-5} WBIN,HBIN", instance.BinShape.Width, instance.BinShape.Height));
|
---|
228 | for (int i = 0; i < instance.NumItems; i++) {
|
---|
229 | if (i == 0)
|
---|
230 | writer.WriteLine("{0,-5} {1,-5} W(I),H(I),I=1,...,N", instance.Items[i].Width, instance.Items[i].Height);
|
---|
231 | else
|
---|
232 | writer.WriteLine("{0,-5} {1,-5}", instance.Items[i].Width, instance.Items[i].Height);
|
---|
233 |
|
---|
234 | }
|
---|
235 | writer.Flush();
|
---|
236 | }
|
---|
237 | }
|
---|
238 |
|
---|
239 | }
|
---|
240 | }
|
---|