/usr/include/astrometry/dualtree.h is in libastrometry-dev 0.67+dfsg-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | /*
# This file is part of libkd.
# Licensed under a 3-clause BSD style license - see LICENSE
*/
/**
\file
Dual-tree search.
Input:
-a search tree
-a query tree
-a function that takes two nodes and returns true if the result set should
contain that pair of nodes.
-an extra value that will be passed to the decision function.
-a function that is called for each pair of leaf nodes.
(** actually, at least one of the nodes will be a leaf. **)
-an extra value that will be passed to the leaf-node function
The query tree is a kd-tree built out of the points you want to query.
The search and query trees can be the same tree.
*/
#include "astrometry/starutil.h"
#include "astrometry/kdtree.h"
typedef anbool (*decision_function)(void* extra, kdtree_t* searchtree, int searchnode,
kdtree_t* querytree, int querynode);
typedef void (*start_of_results_function)(void* extra, kdtree_t* querytree, int querynode);
typedef void (*result_function)(void* extra, kdtree_t* searchtree, int searchnode,
kdtree_t* querytree, int querynode);
typedef void (*end_of_results_function)(void* extra, kdtree_t* querytree, int querynode);
struct dualtree_callbacks {
decision_function decision;
void* decision_extra;
start_of_results_function start_results;
void* start_extra;
result_function result;
void* result_extra;
end_of_results_function end_results;
void* end_extra;
};
typedef struct dualtree_callbacks dualtree_callbacks;
void dualtree_search(kdtree_t* search, kdtree_t* query,
dualtree_callbacks* callbacks);
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