Last change
on this file since 17510 was
7128,
checked in by epitzer, 13 years ago
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#1696 Integrate fitness landscape analysis plugins from Heureka! repository.
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File size:
1.4 KB
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1 | using System;
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2 | using System.Collections.Generic;
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3 | using System.Drawing;
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4 | using System.Linq;
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5 |
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6 | namespace HeuristicLab.Analysis.FitnessLandscape {
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7 |
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8 | public class ColorGradient {
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9 |
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10 | private SortedList<double, Color> colors;
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11 |
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12 | public ColorGradient() {
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13 | Clear();
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14 | }
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15 |
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16 | public void Clear() {
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17 | colors = new SortedList<double, Color>();
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18 | }
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19 |
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20 | public Color this[double index] {
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21 | get {
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22 | if (colors.Count == 0)
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23 | throw new KeyNotFoundException();
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24 | KeyValuePair<double, Color> lower = colors.First();
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25 | if (index < lower.Key)
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26 | return lower.Value;
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27 | foreach (var upper in colors) {
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28 | if (upper.Key == index)
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29 | return upper.Value;
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30 | if (upper.Key > index) {
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31 | double alpha = (index - lower.Key) / (upper.Key - lower.Key);
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32 | return Color.FromArgb(
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33 | (int)Math.Round(upper.Value.A * alpha + lower.Value.A * (1 - alpha)),
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34 | (int)Math.Round(upper.Value.R * alpha + lower.Value.R * (1 - alpha)),
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35 | (int)Math.Round(upper.Value.G * alpha + lower.Value.G * (1 - alpha)),
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36 | (int)Math.Round(upper.Value.B * alpha + lower.Value.B * (1 - alpha)));
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37 | }
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38 | lower = upper;
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39 | }
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40 | return colors.Last().Value;
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41 | }
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42 | set {
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43 | colors[index] = value;
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44 | }
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45 | }
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46 | }
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47 | }
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