# QVM: Quaternions, Vectors, Matrices

### set_roty(mat,scalar)

#include <boost/qvm/mat_operations.hpp>

    namespace qvm
    {
        //Only enabled if:
        //  is_mat<A>::value && mat_traits<A>::rows>=3 &&
        //  mat_traits<A>::rows==mat_traits<A>::cols
        template <class A>
        void set_roty( A & a, typename mat_traits<A>::scalar_type angle );
    }

#### Effects:

As if:

    assign(
        a,
        roty_mat<mat_traits<A>::rows>(angle));

See also: boost/qvm/mat_operations.hpp