sphere_diameter.h

// Description: Diameter of a sphere
// Documentation: diameter.txt

#ifndef PASTELGEOMETRY_SPHERE_DIAMETER_H
#define PASTELGEOMETRY_SPHERE_DIAMETER_H

#include "pastel/geometry/shape/sphere.h"
#include "pastel/sys/math_functions.h"

namespace Pastel
{

    //! Returns the diameter of a sphere.
    template <typename Real, int N>
    Real diameter(
        const Sphere<Real, N>& sphere)
    {
        return 2 * sphere.radius();
    }

    //! Returns the squared diameter of a sphere.
    template <typename Real, int N>
    Real diameter2(
        const Sphere<Real, N>& sphere)
    {
        return 4 * square(sphere.radius());
    }

}

#endif