I am interested, I have used similar libraries with great effects. On Tue, Jun 17, 2014 at 10:12 PM, Matus Chochlik <chochlik@gmail.com> wrote:

Hi,

I would like to gauge interest in adding a very lightweight library implementing a class for handling planar angles and related operations to Boost.

The library sources and several examples of usage can be found here:

https://github.com/matus-chochlik/angle

It does not conform to Boost conventions yet, nor is there any documentation, but the library is very simple to use:

There is a template angles::angle<T> representing planar angles, using type T to store the angle value in radians. Conversions for 10 common angle units are included and new units can easily be added. The library also implements construction functions and user-defined literal operators allowing to specify angles in various units and also implements overloads of functions like sin, cos, etc.

The only external header that this library includes is standard `cmath`.

Here follow some examples of usage:

using namespace angles;

for(angle<double> a; a < 4_turns; a += 45_deg) { std::cout << a.to<unit::degree>() << std::endl; }

for(angle<double> a=-quarters(2); a <= quarters(2); a += gradians(50)) { std::cout << a.to<unit::turn>() << std::endl; }

for(angle<double> a; a < turns(1); a += degrees(15)) { std::cout << sin(a) << std::endl; }

assert(turns(1) == quarters(4)); assert(degrees(90) == gradians(100)); assert(degrees(45) == quarters(0.5)); assert(degrees(2) == minutes(120)); assert(minutes(4) == seconds(240)); assert(degrees(1) == seconds(3600)); assert(turns(0.5) == gradians(200)); assert(pi(1) == quarters(2));

assert( 3_o_clock == 90_deg); assert( 6_o_clock == 200_gon); assert( 7_o_clock == 210_deg); assert( 9_o_clock == 300_gon); assert(11_o_clock == 1_turns - 30_deg); assert(12_o_clock == 2_pi);

Please let me know if you are interested in the 'Boostification' of this library or if you have any ideas on how it could be improved.

Best regards,

Matus

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