Map2D.h

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//
// Created by kifir on 7/29/24.
//
 
#pragma once
 
#include <optional>
 
class ValueProvider2D {
public:
    virtual std::optional<float> getValue(float x) const = 0;
};
 
template<int TLength, typename TValue, typename TBin>
class Map2D : public ValueProvider2D {
public:
    Map2D(const char* const name);
 
    void initTable(const TValue (&values)[TLength], const TBin (&bins)[TLength]);
 
    virtual std::optional<float> getValue(const float x) const;
private:
    const char* const m_name;
 
    const TValue (*m_values)[TLength] = nullptr;
    const TBin (*m_bins)[TLength] = nullptr;
};
 
template<int TLength, typename TValue, typename TBin>
Map2D<TLength, TValue, TBin>::Map2D(const char* const name) : m_name(name) {
}
 
template<int TLength, typename TValue, typename TBin>
void Map2D<TLength, TValue, TBin>::initTable(const TValue (&values)[TLength], const TBin (&bins)[TLength]) {
    m_values = &values;
    m_bins = &bins;
}
 
template<int TLength, typename TValue, typename TBin>
std::optional<float> Map2D<TLength, TValue, TBin>::getValue(const float x) const {
    if (!m_bins) {
        criticalError("Access to uninitialized bins: %s", m_name);
        return {};
    } else if (!m_values) {
        criticalError("Access to uninitialized values: %s", m_name);
        return {};
    } else if ((1 < TLength) && ((*m_bins)[0] == 0.0f) && ((*m_bins)[1] == 0.0f)) {
        // bins are uninitialized, but it isn't critical - maybe old configuration
        return {};
    } else {
        return std::make_optional(interpolate2d(x, *m_bins, *m_values));
    }
}