[15102] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[17181] | 3 | * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[15102] | 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using HeuristicLab.Common;
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| 23 | using HeuristicLab.Core;
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[17097] | 24 | using HEAL.Attic;
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[15102] | 25 |
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| 26 | namespace HeuristicLab.Encodings.RealVectorEncoding {
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| 27 | [Item("Velocity Initializer (SPSO 2011)", "Initializes the velocity vector.")]
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[17097] | 28 | [StorableType("E844F8B9-068B-433D-8693-9416CA9140FB")]
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[15102] | 29 | public class SPSO2011VelocityInitializer : SPSOVelocityInitializer {
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| 30 |
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| 31 | #region Construction & Cloning
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| 32 | [StorableConstructor]
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[17097] | 33 | protected SPSO2011VelocityInitializer(StorableConstructorFlag _) : base(_) { }
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[15102] | 34 | protected SPSO2011VelocityInitializer(SPSO2011VelocityInitializer original, Cloner cloner) : base(original, cloner) { }
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| 35 | public SPSO2011VelocityInitializer() : base() { }
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| 36 | public override IDeepCloneable Clone(Cloner cloner) {
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| 37 | return new SPSO2011VelocityInitializer(this, cloner);
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| 38 | }
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| 39 | #endregion
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| 40 |
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| 41 | public override IOperation Apply() {
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| 42 | var random = RandomParameter.ActualValue;
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| 43 | var bounds = BoundsParameter.ActualValue;
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| 44 | var position = RealVectorParameter.ActualValue;
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| 45 | var velocity = new RealVector(position.Length);
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| 46 | for (var i = 0; i < velocity.Length; i++) {
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| 47 | var lower = (bounds[i % bounds.Rows, 0] - position[i]);
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| 48 | var upper = (bounds[i % bounds.Rows, 1] - position[i]);
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| 49 | velocity[i] = lower + random.NextDouble() * (upper - lower); // SPSO 2011
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| 50 | }
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| 51 | VelocityParameter.ActualValue = velocity;
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| 52 | return base.Apply();
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| 53 | }
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| 54 | }
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| 55 | }
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