[cairo] Shouldn't Cairo use/offer degrees rather than radians?

Thu Jun 29 02:18:35 UTC 2017

I wrote:

> On Wed, 28 Jun 2017 12:34:34 +0200, David Kastrup wrote:
> 
> > That is more than Cairo can deliver right now.  
> 
> Only by special-casing

Which has consequences. Enclosed is a plot I just did of
double-precision y = cos(x), in epsilon steps in the vicinity of x =
π/2. This is supposed to be almost exactly a straight line, but as you
can see, special-casing y = 0 at the midpoint introduces a kink into the
line. This kind of thing can have consequences.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: cos_90deg_plot.png
Type: image/png
Size: 4189 bytes
Desc: not available
URL: <https://lists.cairographics.org/archives/cairo/attachments/20170629/e524ea92/attachment.png>