> On Oct 9, 2015, at 21:13 , Graham Cox <graham....@bigpond.com> wrote:
>
>
>> On 10 Oct 2015, at 1:58 am, Michael de Haan <m...@comcast.net> wrote:
>>
>> func degrees2radians(coordinate:CLLocationDegrees) -> Double {
>>
>> return (M_PI * coordinate ) / 180.00
>> }
>>
>> func radians2degrees(coordinate:CLLocationDegrees) -> Double {
>>
>> return (180.00 * coordinate ) / M_PI
>> }
>>
>
> JFYI:
>
> It might be worth noting that for performance crtical code, these two
> functions can be replaced by simple multiply-by-a-constant macros:
>
>
> #define DEGREES_TO_RADIANS( d ) ((d) *
> 0.0174532925199432958)
> #define RADIANS_TO_DEGREES( r ) ((r) *
> 57.29577951308232)
The compiler should figure that out either way it's written.
--
Rick Mann
rm...@latencyzero.com
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