Re: Math.h functions with CGFloat
Re: Math.h functions with CGFloat
- Subject: Re: Math.h functions with CGFloat
- From: steven Hooley <email@hidden>
- Date: Tue, 10 Aug 2010 16:08:32 +0100
But then e.g. when building 32-bit i still have to cast the return
value or i get the warning:-
'implicit conversion shortens 64-bit value into a 32-bit value'
It seems that this warning is my fault because i have added the flag
-Wshorten-64-to-32 which isn't enabled by default so maybe it
shouldn't be?
Thanks
On 10 August 2010 15:19, Graham Cox <email@hidden> wrote:
>
> On 11/08/2010, at 12:12 AM, steven Hooley wrote:
>
>> Because CGFloat is typedef'd to float on 32bit and double on 64bit i
>> have to swap between, eg, atan and atanf depending on my build
>> settings. I have a framework which is intended to support 32bit and
>> 64bit.
>
>
> Just use atan(). 32-bit floats are promoted to doubles silently. There is a slight performance penalty but it's absolutely tiny.
>
> --Graham
>
>
>
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