MRSphere.h

Go to the documentation of this file.

#pragma once
 
namespace MR
{
 
template <typename V>
struct Sphere
{
    using T = typename V::ValueType;
 
    V center;
    T radius = 0;
 
    constexpr Sphere() noexcept = default;
    constexpr Sphere( const V & c, T r ) noexcept : center( c ), radius( r ) { }
    template <typename U>
    constexpr explicit Sphere( const Sphere<U> & l ) noexcept : center( l.center ), radius( T( l.radius ) ) { }
 
    [[nodiscard]] V project( const V & x ) const { return center + radius * ( x - center ).normalized(); }
 
    [[nodiscard]] T distance( const V & x ) const { return ( x - center ).length() - radius; }
 
    [[nodiscard]] T distanceSq( const V & x ) const { return sqr( distance( x ) ); }
 
    friend bool operator == ( const Sphere & a, const Sphere & b ) = default;
};
 
} // namespace MR