ArraySamplers1.h

Go to the documentation of this file.

/*************************************************************************
> File Name: ArraySamplers1.h
> Project Name: CubbyFlow
> Author: Chan-Ho Chris Ohk
> Purpose: 1-D nearest array sampler class.
> Created Time: 2017/04/29
> Copyright (c) 2018, Chan-Ho Chris Ohk
*************************************************************************/
#ifndef CUBBYFLOW_ARRAY_SAMPLERS1_H
#define CUBBYFLOW_ARRAY_SAMPLERS1_H

#include <Core/Array/ArrayAccessor1.h>
#include <Core/Array/ArraySamplers.h>

#include <functional>

namespace CubbyFlow
{
    template <typename T, typename R>
    class NearestArraySampler<T, R, 1> final
    {
    public:
        static_assert(std::is_floating_point<R>::value, "Samplers only can be instantiated with floating point types");

        explicit NearestArraySampler(
            const ConstArrayAccessor1<T>& accessor,
            R gridSpacing,
            R gridOrigin);

        NearestArraySampler(const NearestArraySampler& other);

        T operator()(R pt) const;

        void GetCoordinate(R pt, size_t* i) const;

        std::function<T(R)> Functor() const;

    private:
        R m_gridSpacing;
        R m_origin;
        ConstArrayAccessor1<T> m_accessor;
    };

    template <typename T, typename R>
    using NearestArraySampler1 = NearestArraySampler<T, R, 1>;
    
    template <typename T, typename R>
    class LinearArraySampler<T, R, 1> final
    {
    public:
        static_assert(std::is_floating_point<R>::value, "Samplers only can be instantiated with floating point types");

        explicit LinearArraySampler(
            const ConstArrayAccessor1<T>& accessor,
            R gridSpacing,
            R gridOrigin);

        LinearArraySampler(const LinearArraySampler& other);

        T operator()(R pt) const;

        void GetCoordinatesAndWeights(R pt, size_t* i0, size_t* i1, T* weight0, T* weight1) const;

        std::function<T(R)> Functor() const;

    private:
        R m_gridSpacing;
        R m_origin;
        ConstArrayAccessor1<T> m_accessor;
    };

    template <typename T, typename R>
    using LinearArraySampler1 = LinearArraySampler<T, R, 1>;
    
    template <typename T, typename R>
    class CubicArraySampler<T, R, 1> final
    {
    public:
        static_assert(std::is_floating_point<R>::value, "Samplers only can be instantiated with floating point types");

        explicit CubicArraySampler(
            const ConstArrayAccessor1<T>& accessor,
            R gridSpacing,
            R gridOrigin);

        CubicArraySampler(const CubicArraySampler& other);

        T operator()(R pt) const;

        std::function<T(R)> Functor() const;

    private:
        R m_gridSpacing;
        R m_origin;
        ConstArrayAccessor1<T> m_accessor;
    };

    template <typename T, typename R>
    using CubicArraySampler1 = CubicArraySampler<T, R, 1>;
}

#include <Core/Array/ArraySamplers1-Impl.h>

#endif