2014-06-05 2:48 GMT-04:00 Rik Cabanier <caban...@gmail.com>:
>
>
>
> On Wed, Jun 4, 2014 at 2:20 PM, Milan Sreckovic <msrecko...@mozilla.com>
> wrote:
>
>> In general, is “this is how it worked with SVGMatrix” one of the design
>> principles?
>>
>> I was hoping this would be the time matrix rotate() method goes to
>> radians, like the canvas rotate, and unlike SVGMatrix version that takes
>> degrees...
>>
>
> "degrees" is easier to understand for authors.
> With the new DOMMatrix constructor, you can specify radians:
>
> var m = new DOMMatrix('rotate(1.75rad)' ;
>
> Not specifying the unit will make it default to degrees (like angles in
> SVG)
>
The situation isn't symmetric: radians are inherently simpler to implement
(thus slightly faster), basically because only in radians is it true that
sin(x) ~= x for small x.
I also doubt that degrees are simpler to understand, and if anything you
might just want to provide a simple name for the constant 2*pi:
var turn = Math.PI * 2;
Now, what is easier to understand:
rotate(turn / 5)
or
rotate(72)
?
Benoit
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