oops, abs() != fabs() - and DBL_EPSILON isn't what I thought it was
const discarded
#if -> #ifdef
warning: returning reference to temporary
unused var, '/*' in comment
quell unused parameter warnings in certain functions

- only in functions that shouldn't be called or are unimplemented
- implemented some of the obvious ones, print error messages in the others
unused parameter
cleanup
fix initialization order warning
initialize base class in copy constructor
signed-unsigned comparison
parenthesis around assignment used as bool
unused params in virtual member functions

- params can't be removed because they are used in that function in other class(es)
unused variable
rename variable that shadowed another
c++ comments in c
temp