113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup bli
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* \brief A KD-tree for nearest neighbor search.
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*/
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#include "BLI_compiler_attrs.h"
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#include "BLI_sys_types.h"
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#define _BLI_CONCAT_AUX(MACRO_ARG1, MACRO_ARG2) MACRO_ARG1##MACRO_ARG2
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#define _BLI_CONCAT(MACRO_ARG1, MACRO_ARG2) _BLI_CONCAT_AUX(MACRO_ARG1, MACRO_ARG2)
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#define BLI_kdtree_nd_(id) _BLI_CONCAT(KDTREE_PREFIX_ID, _##id)
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct KDTree;
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typedef struct KDTree KDTree;
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typedef struct KDTreeNearest {
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int index;
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float dist;
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float co[KD_DIMS];
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} KDTreeNearest;
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KDTree *BLI_kdtree_nd_(new)(unsigned int maxsize);
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void BLI_kdtree_nd_(free)(KDTree *tree);
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void BLI_kdtree_nd_(balance)(KDTree *tree) ATTR_NONNULL(1);
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void BLI_kdtree_nd_(insert)(KDTree *tree, int index, const float co[KD_DIMS]) ATTR_NONNULL(1, 3);
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int BLI_kdtree_nd_(find_nearest)(const KDTree *tree,
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const float co[KD_DIMS],
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KDTreeNearest *r_nearest) ATTR_NONNULL(1, 2);
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int BLI_kdtree_nd_(find_nearest_n)(const KDTree *tree,
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const float co[KD_DIMS],
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KDTreeNearest *r_nearest,
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uint nearest_len_capacity) ATTR_NONNULL(1, 2, 3);
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int BLI_kdtree_nd_(range_search)(const KDTree *tree,
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const float co[KD_DIMS],
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KDTreeNearest **r_nearest,
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float range) ATTR_NONNULL(1, 2) ATTR_WARN_UNUSED_RESULT;
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int BLI_kdtree_nd_(find_nearest_cb)(
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const KDTree *tree,
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const float co[KD_DIMS],
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int (*filter_cb)(void *user_data, int index, const float co[KD_DIMS], float dist_sq),
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void *user_data,
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KDTreeNearest *r_nearest);
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void BLI_kdtree_nd_(range_search_cb)(
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const KDTree *tree,
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const float co[KD_DIMS],
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float range,
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bool (*search_cb)(void *user_data, int index, const float co[KD_DIMS], float dist_sq),
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void *user_data);
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int BLI_kdtree_nd_(calc_duplicates_fast)(const KDTree *tree,
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float range,
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bool use_index_order,
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int *doubles);
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int BLI_kdtree_nd_(deduplicate)(KDTree *tree);
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/** Versions of find/range search that take a squared distance callback to support bias. */
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int BLI_kdtree_nd_(find_nearest_n_with_len_squared_cb)(
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const KDTree *tree,
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const float co[KD_DIMS],
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KDTreeNearest *r_nearest,
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uint nearest_len_capacity,
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float (*len_sq_fn)(const float co_search[KD_DIMS],
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const float co_test[KD_DIMS],
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const void *user_data),
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const void *user_data) ATTR_NONNULL(1, 2, 3);
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int BLI_kdtree_nd_(range_search_with_len_squared_cb)(
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const KDTree *tree,
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const float co[KD_DIMS],
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KDTreeNearest **r_nearest,
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float range,
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float (*len_sq_fn)(const float co_search[KD_DIMS],
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const float co_test[KD_DIMS],
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const void *user_data),
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const void *user_data) ATTR_NONNULL(1, 2) ATTR_WARN_UNUSED_RESULT;
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#ifdef __cplusplus
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}
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#endif
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#ifdef __cplusplus
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template<typename Fn>
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inline void BLI_kdtree_nd_(range_search_cb_cpp)(const KDTree *tree,
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const float co[KD_DIMS],
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float distance,
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const Fn &fn)
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{
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BLI_kdtree_nd_(range_search_cb)(
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tree,
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co,
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distance,
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[](void *user_data, const int index, const float *co, const float dist_sq) {
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const Fn &fn = *static_cast<const Fn *>(user_data);
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return fn(index, co, dist_sq);
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},
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const_cast<Fn *>(&fn));
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}
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#endif
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#undef _BLI_CONCAT_AUX
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#undef _BLI_CONCAT
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#undef BLI_kdtree_nd_
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