Geometry Boost List: [ggl] Hello + some newbie questions

Subject: [ggl] Hello + some newbie questions
From: Barend (barend)
Date: 2009-05-05 20:04:57

Hi Mateusz,

>
>> Or remove out own constants and use boost::math::*  directly in all
>> ggl:: code?
>>     
>
> I have applied (r685, r686) use of boost::math::constants for PI and for
> HALF.
> Also, I const-qualified intermediate results in functions, to be sure
> compilers will always optimize these values.
>   
Perfect!

> I think the ggl::math::hav function could be template for easy
> interchangeable use with float and double types:
>
> template <typename T>
> inline T hav(T const& theta)
> {
>     using boost::math::constants::half;
>     T const sn = std::sin(half<T>() * theta);
>     return sn * sn;
> }
>   
Good idea, actually I was thinking the same when I revisited this one of 
these days. Strange it was not there.
> Same ggl::math::sqrt.
>   
OK (it is "sqr" and maybe it can go).

Regards, Barend

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