nearest_neighbor_query_engine2.h

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// Copyright (c) 2018 Doyub Kim
//
// I am making my contributions/submissions to this project solely in my
// personal capacity and am not conveying any rights to any intellectual
// property of any third parties.
 
#ifndef INCLUDE_JET_NEAREST_NEIGHBOR_QUERY_ENGINE2_H_
#define INCLUDE_JET_NEAREST_NEIGHBOR_QUERY_ENGINE2_H_
 
#include <jet/constants.h>
#include <jet/vector2.h>
 
#include <functional>
 
namespace jet {
 
template <typename T>
struct NearestNeighborQueryResult2 {
    const T* item = nullptr;
    double distance = kMaxD;
};
 
template <typename T>
using NearestNeighborDistanceFunc2 =
    std::function<double(const T&, const Vector2D&)>;
 
template <typename T>
class NearestNeighborQueryEngine2 {
 public:
    virtual NearestNeighborQueryResult2<T> nearest(
        const Vector2D& pt,
        const NearestNeighborDistanceFunc2<T>& distanceFunc) const = 0;
};
 
}  // namespace jet
 
#endif  // INCLUDE_JET_NEAREST_NEIGHBOR_QUERY_ENGINE2_H_