Re: [boost] [Units] Incorrect definitions for torque, newton_meter

There’s also a discussion of this issue in Wikipedia: https://en.wikipedia.org/wiki/Radian

On Aug 25, 2022, at 5:27 PM, Albert Dvornik via Boost wrote:

It looks like my previous message wasn't visible by non-HTML readers (including the list archive) because I didn't configure my so-called mailer correctly. Sorry for the duplication and the hassle.

bert

-------------------- Hi, all.

The definitions of boost::units::torque_dimension, boost::units::si::torque, boost::units::si::newton_meter and boost::units::si::newton_meters seem broken. The most obvious symptom of this is that boost::units::si::newton_meter isn't the same thing as boost::units::si::newton * boost::units::si::meter (i.e. an actual N m), but is instead defined to be equivalent to *N m / rad* instead.

I'm attaching a source file that shows the problem. I've compiled it with Boost 1.80, g++ 10.2.1.

Am I confused in some way? If not, then I believe that the fix would be to modify boost/units/physical_dimensions/torque.hpp and remove the ", plane_angle_base_dimension,-1" in the current definition of torque_dimension.

Regards, bert Dvornik

_______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost