How do I get the transformed vertex coordanites after calling glTranslate*() and glRotate*(). I need something like this:

xtranformed = transform_vertex_x(x, y, z);
ytranformed = transform_vertex_y(x, y, z);
ztranformed = transform_vertex_z(x, y, z);
 

where x, y, and z is the vertex that I want to be transformed. Can I just multiply it by the current model matrix? If so, how do I do that? thanks