MRSegmPoint.h

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#pragma once
 
#include <limits>
 
namespace MR
{
 
template <typename T>
struct SegmPoint
{
    T a = 0; 
 
    static constexpr auto eps = 10 * std::numeric_limits<T>::epsilon();
 
    SegmPoint() = default;
    SegmPoint( T a ) : a( a ) { }
    operator T() const { return a; }
    operator T&() { return a; }
 
    template <typename U>
    [[nodiscard]] U interpolate( const U & v0, const U & v1 ) const
    {
        return ( 1 - a ) * v0 + a * v1;
    }
 
    [[nodiscard]] int inVertex() const
    {
        if ( a <= eps )
            return 0;
        if ( 1 - a <= eps )
            return 1;
        return -1;
    }
 
    [[nodiscard]] SegmPoint sym() const { return { 1 - a }; }
    [[nodiscard]] bool operator==( const SegmPoint& rhs ) const = default;
    [[nodiscard]] bool operator==( T rhs ) const { return a == rhs; }
};
 
} // namespace MR