clamp T

gistfile1.txt

template<typename T>
class ConstraintUnit {
        T minv, maxv, v;
        typedef const T &crefT;

        ConstraintUnit(const T &minval, const T &maxval)
                : minv(minval), maxv (maxval)
        {
        }

        void lower(const T& val)
        {
                minv = val;
        }

        void upper(const T& val)
        {
                maxv = val;
        }

        const T &clamped() const
        {
                return v > maxv ? maxv :
                        v < minv ? minv : v;
        }

        const T &value() const
        {
                return v;
        }

        const T &clamp()
        {
                v = clamped();
                return v;
        }

        const T &setval(const T &newv)
        {
                v = newv;
                return clamp();
        }
};