1 | /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ |
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2 | #ifndef PCA_SPLIT_H |
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3 | #define PCA_SPLIT_H |
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4 | |
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5 | #include <memory.h> |
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6 | |
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7 | #include "Vector3.h" |
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8 | #include "Vector4.h" |
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9 | |
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10 | namespace PCA { |
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11 | |
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12 | class Point |
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13 | { |
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14 | public: |
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15 | Point() : |
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16 | size(1.0f), |
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17 | value(0.0f) |
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18 | {} |
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19 | |
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20 | Vector3 position; |
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21 | Vector4 color; |
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22 | float size; |
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23 | float value; |
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24 | }; |
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25 | |
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26 | class Cluster |
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27 | { |
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28 | public: |
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29 | Cluster() : |
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30 | centroid(0.0f, 0.0f, 0.0f), |
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31 | color(1.0f, 1.0f, 1.0f, 1.0f), |
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32 | scale(0.0f), |
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33 | numOfChildren(0), |
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34 | numOfPoints(0), |
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35 | points(NULL), |
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36 | children(NULL), |
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37 | vbo(0), |
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38 | level(0) |
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39 | { |
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40 | } |
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41 | |
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42 | void setChildren(Cluster *children, int count) |
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43 | { |
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44 | this->children = children; |
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45 | numOfChildren = count; |
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46 | } |
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47 | |
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48 | void setPoints(Point *points, int count) |
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49 | { |
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50 | this->points = points; |
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51 | numOfPoints = count; |
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52 | } |
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53 | |
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54 | Vector3 centroid; |
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55 | Vector4 color; |
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56 | float scale; |
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57 | |
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58 | int numOfChildren; |
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59 | int numOfPoints; |
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60 | Point *points; |
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61 | Cluster *children; |
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62 | unsigned int vbo; |
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63 | int level; |
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64 | }; |
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65 | |
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66 | class ClusterAccel |
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67 | { |
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68 | public: |
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69 | ClusterAccel(int maxlevel) : |
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70 | root(NULL), |
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71 | maxLevel(maxlevel) |
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72 | { |
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73 | startPointerCluster = new Cluster *[maxLevel]; |
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74 | numOfClusters = new int[maxLevel]; |
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75 | vbo = new unsigned int[maxLevel]; |
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76 | memset(vbo, 0, sizeof(unsigned int) * maxLevel); |
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77 | } |
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78 | |
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79 | Cluster *root; |
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80 | int maxLevel; |
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81 | Cluster **startPointerCluster; |
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82 | int *numOfClusters; |
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83 | unsigned int *vbo; |
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84 | }; |
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85 | |
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86 | class Cluster_t |
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87 | { |
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88 | public: |
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89 | Cluster_t() : |
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90 | numOfPoints_t(0), |
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91 | scale_t(0.0f), |
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92 | points_t(0) |
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93 | {} |
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94 | |
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95 | Vector3 centroid_t; |
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96 | int numOfPoints_t; |
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97 | float scale_t; |
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98 | Point *points_t; |
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99 | }; |
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100 | |
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101 | class ClusterListNode |
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102 | { |
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103 | public: |
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104 | ClusterListNode(Cluster_t *d, ClusterListNode *n) : |
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105 | data(d), |
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106 | next(n) |
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107 | {} |
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108 | |
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109 | ClusterListNode() : |
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110 | data(NULL), |
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111 | next(NULL) |
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112 | {} |
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113 | |
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114 | Cluster_t *data; |
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115 | ClusterListNode *next; |
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116 | }; |
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117 | |
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118 | class PCASplit |
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119 | { |
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120 | public: |
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121 | enum { |
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122 | MAX_INDEX = 8000000 |
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123 | }; |
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124 | |
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125 | PCASplit(); |
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126 | |
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127 | ~PCASplit(); |
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128 | |
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129 | ClusterAccel *doIt(Point *data, int count); |
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130 | |
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131 | void setMinDistance(float minDistance) |
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132 | { |
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133 | _minDistance = minDistance; |
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134 | } |
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135 | |
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136 | void setMaxLevel(int maxLevel) |
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137 | { |
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138 | _maxLevel = maxLevel; |
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139 | } |
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140 | |
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141 | static void computeDistortion(Point *data, int count, const Vector3& mean, float& distortion, float& maxSize); |
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142 | |
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143 | static void computeCentroid(Point *data, int count, Vector3& mean); |
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144 | |
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145 | static void computeCovariant(Point *data, int count, const Vector3& mean, float *m); |
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146 | |
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147 | private: |
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148 | void init(); |
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149 | |
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150 | void analyze(ClusterListNode *cluster, Cluster *parent, int level, float limit); |
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151 | |
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152 | void addLeafCluster(Cluster_t *cluster); |
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153 | |
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154 | Cluster *createClusterBlock(ClusterListNode *clusterList, int count, int level); |
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155 | |
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156 | void split(Point *data, int count, float maxDistortion); |
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157 | |
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158 | float getMaxDistortionSquare(ClusterListNode *clusterList, int count); |
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159 | |
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160 | ClusterAccel *_clusterHeader; |
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161 | |
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162 | ClusterListNode *_curClusterNode; |
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163 | ClusterListNode *_memClusterChunk1; |
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164 | ClusterListNode *_memClusterChunk2; |
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165 | ClusterListNode *_curMemClusterChunk; |
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166 | |
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167 | int _memClusterChunkIndex; |
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168 | |
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169 | Cluster *_curRoot; |
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170 | |
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171 | int _curClusterCount; |
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172 | int _maxLevel; |
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173 | float _minDistance; |
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174 | float _distanceScale; |
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175 | unsigned int *_indices; |
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176 | int _indexCount; |
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177 | int _finalMaxLevel; |
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178 | }; |
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179 | |
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180 | } |
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181 | |
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182 | #endif |
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183 | |
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