> >> that they make >> any more sense than coordinates for any other level of the >> atom::Hierarchy. > > On this I agree with you - if atoms have coordinates, then so should > residues, chains, domains, proteins. It certainly seems reasonable > therefore that *none* of these things should have coordinates "by > construction" and that we just use an XYZDecorator (or an > XYZRDecorator) > if we want to additionally treat them as points or spheres. That was my thought. Having unused coordinated is bad and all levels should be equivalent.
> > Well, that is true, but it seems reasonable to allow multiple > inheritance in decorators - or at least, it seems unreasonable to > preclude it. The problem is just a practical one: either we use virtual inheritence or we have two particle pointers. Neither is very nice.