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BallTree.h
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1 /*
2  * Copyright (c) The Shogun Machine Learning Toolbox
3  * Written (w) 2014 Parijat Mazumdar
4  * All rights reserved.
5  *
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7  * modification, are permitted provided that the following conditions are met:
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9  * 1. Redistributions of source code must retain the above copyright notice, this
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30 
31 
32 #ifndef _BALLTREE_H__
33 #define _BALLTREE_H__
34 
35 #include <shogun/lib/config.h>
36 
38 
39 namespace shogun
40 {
41 
45 class CBallTree : public CNbodyTree
46 {
47 public:
53  CBallTree(int32_t leaf_size=1, EDistanceType d=D_EUCLIDEAN);
54 
56  virtual ~CBallTree() { };
57 
61  virtual const char* get_name() const { return "BallTree"; }
62 
63 private:
71  float64_t min_dist(bnode_t* node,float64_t* feat, int32_t dim);
72 
79  virtual float64_t min_dist_dual(bnode_t* nodeq, bnode_t* noder);
80 
87  virtual float64_t max_dist_dual(bnode_t* nodeq, bnode_t* noder);
88 
97  void min_max_dist(float64_t* pt, bnode_t* node, float64_t &lower,float64_t &upper, int32_t dim);
98 
105  void init_node(bnode_t* node, index_t start, index_t end);
106 
107 };
108 } /* namespace shogun */
109 
110 #endif /* _BALLTREE_H__ */

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