QVM: Quaternions, Vectors, Matrices

#include <boost/qvm/vec_operations.hpp>

namespace boost
{
    namespace qvm
    {
        //Only enabled if:
        //  is_vec<A>::value && is_vec<B>::value &&
        //  vec_traits<A>::dim==3 && vec_traits<B>::dim==3
        template <class A,class B>
        typename deduce_vec2<A,B,3>::type
        cross( A const & a, B const & b );
    }
}