> On Oct 9, 2015, at 21:13 , Graham Cox <[email protected]> wrote: > > >> On 10 Oct 2015, at 1:58 am, Michael de Haan <[email protected]> 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 [email protected] _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
