Hi On Sat, Nov 12, 2016 at 12:30:52PM -0500, Vittorio Giovara wrote: > On Sat, Nov 12, 2016 at 9:41 AM, James Almer <jamr...@gmail.com> wrote: > > On 11/11/2016 10:39 PM, Michael Niedermayer wrote: > >> On Fri, Nov 11, 2016 at 05:49:00PM -0500, Vittorio Giovara wrote: [...] > >> > >>> + double yaw; ///< Clockwise rotation around the up vector [-180, > >>> 180]. > >>> + double pitch; ///< Counter-clockwise rotation around the right > >>> vector [-90, 90]. > >>> + double roll; ///< Counter-clockwise rotation around the forward > >>> vector [-180, 180]. > >> > >> please use intXY (64 or 32 as preferred) so there are no platform > >> rounding dependancies > > These are rotation angles which are inherently floating point, and
Theres nothing inherently floating point on an angle. > consistent with what other rotation-related APIs export (eg. > av_display_matrix_rotation_get()). > Besides using intXX would lose > precision that the original specification offers. int64_t has about a thousand times higher precission than a double for storing general -180°..+180° angles. This is because doubles have 11 bits for a exponent which is exactly the same value for most of the angles [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Into a blind darkness they enter who follow after the Ignorance, they as if into a greater darkness enter who devote themselves to the Knowledge alone. -- Isha Upanishad
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