# QVM: Quaternions, Vectors, Matrices

### scalar_traits

#include <boost/qvm/scalar_traits.hpp>

    namespace boost
    {
        namespace qvm
        {
            template <class Scalar>
            struct scalar_traits
            {
                BOOST_QVM_INLINE_CRITICAL
                static Scalar value( int v )
                {
                    return Scalar(v);
                }
            };
        }
    }

This template can be specialized for user-defined scalar types to define the appropriate conversion from int; this is primarily used whenever Boost QVM needs to deduce a zero or one value.

See also: boost/qvm/scalar_traits.hpp | inverse(mat) | is_scalar | normalize(quat) | normalize(vec) | Scalar Requirements | zero_mat | zero_quat | zero_vec