source: branches/2931_OR-Tools_LP_MIP/HeuristicLab.MathematicalOptimization/3.3/LinearProgramming/Templates/CompiledLinearProgrammingProblemDefinition.cs @ 16288

Last change on this file since 16288 was 16288, checked in by ddorfmei, 8 months ago

#2931:

  • added license information to all files
  • added missing storable and cloning constructors
  • fixed a bug that caused an exception when a Hive Slave tried to delete the files in the PluginTemp folder
File size: 2.1 KB
Line 
1using System;
2using System.Linq;
3using System.Collections.Generic;
4using Google.OrTools.LinearSolver;
5using HeuristicLab.Common;
6using HeuristicLab.Core;
7using HeuristicLab.Data;
8using HeuristicLab.MathematicalOptimization.LinearProgramming.Problems;
9using HeuristicLab.Optimization;
10using HeuristicLab.Problems.Programmable;
11using Variable = Google.OrTools.LinearSolver.Variable;
12
13namespace HeuristicLab.MathematicalOptimization.LinearProgramming {
14
15  public class CompiledLinearProgrammingProblemDefinition : CompiledProblemDefinition, ILinearProgrammingProblemDefinition {
16    private Variable x;
17    private Variable y;
18   
19    public override void Initialize() {
20      // Use vars.yourVariable to access variables in the variable store i.e. yourVariable
21      // Add additional initialization code e.g. private variables that you need for evaluating
22    }
23   
24    public void BuildModel(Solver solver) {
25      // Use vars.yourVariable to access variables in the variable store i.e. yourVariable
26      // Example model taken from https://developers.google.com/optimization/mip/integer_opt
27      // Define the decision variables
28      x = solver.MakeIntVar(0, 3.5, "x");
29      y = solver.MakeIntVar(0, double.PositiveInfinity, "y");
30      // Define the constraints
31      solver.Add(x + 7 * y <= 17.5);
32      // Define the objective
33      solver.Maximize(x + 10 * y);
34    }
35   
36    public void Analyze(Solver solver, ResultCollection results) {
37      // Use vars.yourVariable to access variables in the variable store i.e. yourVariable
38      // Write or update results given the solution variables of the decision variables
39      results.AddOrUpdateResult("x", new DoubleValue(x.SolutionValue()));
40      results.AddOrUpdateResult("y", new DoubleValue(y.SolutionValue()));
41      // The decision variables can also be retrieved from the solver
42      //results.AddOrUpdateResult("x", new DoubleValue(solver.LookupVariableOrNull("x").SolutionValue()));
43      //results.AddOrUpdateResult("y", new DoubleValue(solver.LookupVariableOrNull("y").SolutionValue()));
44    }
45   
46    // Implement further classes and methods
47  }
48}
49
Note: See TracBrowser for help on using the repository browser.