43         struct { T x, y, z; };  member
67     tvec3() : x(0), y(0), z(0) { }  in tvec3()
71     tvec3(A v) : x(v), y(v), z(v) { }  in tvec3()
74     tvec3(A x, B y, C z) : x(x), y(y), z(z) { }  in tvec3()  argument
77     tvec3(const tvec2<A>& v, B z) : x(v.x), y(v.y), z(z) { }  in tvec3()  argument
80     explicit tvec3(const tvec3<A>& v) : x(v.x), y(v.y), z(v.z) { }  in tvec3()
86           z(((const tvec3<A>&)v).z) { }  in tvec3()
89     tvec3(const Impersonator< tvec2<A> >& v, B z)  in tvec3()  argument
92           z(z) { }  in tvec3()
99                 u.y*v.z - u.z*v.y,  in cross()
100                 u.z*v.x - u.x*v.z,  in cross()