1 | /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ |
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2 | #include "PointSet.h" |
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3 | #include "PCASplit.h" |
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4 | #include <stdlib.h> |
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5 | #include <stdio.h> |
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6 | |
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7 | void |
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8 | PointSet::initialize(Vector4 *values, const unsigned int count, |
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9 | const Vector3& scale, const Vector3& origin, |
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10 | float min, float max) |
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11 | { |
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12 | PCA::PCASplit pcaSplit; |
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13 | |
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14 | _scale = scale; |
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15 | _origin = origin; |
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16 | _min = min; |
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17 | _max = max; |
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18 | |
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19 | PCA::Point *points = (PCA::Point *)malloc(sizeof(PCA::Point) * count); |
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20 | for (unsigned int i = 0; i < count; ++i) { |
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21 | points[i].position.set(values[i].x, values[i].y, values[i].z); |
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22 | points[i].color.set(1.0f, 1.0f, 1.0f, 0.2f); |
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23 | points[i].value = values[i].w; |
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24 | points[i].size = 0.001; |
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25 | } |
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26 | |
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27 | if (_cluster != 0) { |
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28 | delete _cluster; |
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29 | } |
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30 | |
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31 | pcaSplit.setMinDistance(scale.length() / 3.0f); |
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32 | _cluster = pcaSplit.doIt(points, count); |
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33 | } |
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34 | |
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35 | void |
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36 | PointSet::updateColor(float *color, int colorCount) |
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37 | { |
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38 | if (_cluster == 0) { |
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39 | return; |
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40 | } |
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41 | int level = 4; |
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42 | |
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43 | PCA::Cluster *cluster = _cluster->startPointerCluster[level - 1]; |
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44 | PCA::Cluster *c = &(cluster[0]); |
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45 | PCA::Cluster *end = &(cluster[_cluster->numOfClusters[level - 1] - 1]); |
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46 | |
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47 | Vector3 pos; |
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48 | |
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49 | PCA::Point *points; |
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50 | Vector4 *colors = (Vector4 *)color; |
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51 | int numOfPoints; |
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52 | int index; |
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53 | float d = _max - _min; |
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54 | for (; c <= end; c = (PCA::Cluster *)((char *)c + sizeof(PCA::Cluster))) { |
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55 | points = c->points; |
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56 | numOfPoints = c->numOfPoints; |
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57 | |
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58 | for (int i = 0; i < numOfPoints; ++i) { |
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59 | index = (int)((points[i].value - _min) / d * (colorCount - 1)); |
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60 | if (index >= colorCount) { |
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61 | index = colorCount - 1; |
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62 | } |
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63 | points[i].color = colors[index]; |
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64 | } |
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65 | } |
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66 | } |
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67 | |
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