Boost QVM

operator-(q,q)

#include <boost/qvm/q.hpp>

namespace boost
{
    namespace qvm
    {
        //Only enabled if:
        //  is_q<A>::value && is_q<B>::value &&
        template <class A,class B>
        typename deduce_q2<A,B>::type
        operator-( A const & a, B const & b );
    }
}

Returns:

A quaternion with elements equal to the elements of b subtracted from the corresponding elements of a.

See also: boost/qvm/q.hpp