Re: [Units] Incorrect definitions for torque, newton_meter

From: Family Schabel (family_at_[hidden])
Date: 2022-08-29 23:48:05

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 <boost_at_[hidden]> 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
> 
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