[latex3-commits] [git/LaTeX3-latex3-latex3] master: Code comments [ci skip] (b778812)

[Joseph Wright]

Repository : https://github.com/latex3/latex3
On branch  : master
Link       : https://github.com/latex3/latex3/commit/b778812e60d83dc7052c1d7c427f64a221d054f9

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commit b778812e60d83dc7052c1d7c427f64a221d054f9
Author: Joseph Wright <joseph.wright at morningstar2.co.uk>
Date:   Fri Feb 9 21:36:36 2018 +0000

    Code comments [ci skip]


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b778812e60d83dc7052c1d7c427f64a221d054f9
 l3trial/l3draw/l3draw-points.dtx |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/l3trial/l3draw/l3draw-points.dtx b/l3trial/l3draw/l3draw-points.dtx
index e25fec6..5bbfa74 100644
--- a/l3trial/l3draw/l3draw-points.dtx
+++ b/l3trial/l3draw/l3draw-points.dtx
@@ -572,6 +572,10 @@
 %     \@@_point_interpolate_arc_auxv:nnnnnnn,
 %     \@@_point_interpolate_arc_auxv:fnnnnnn
 %   }
+%   Finding a point on an ellipse arc is relatively easy: find the correct
+%   angle between the two given, use the sine and cosine of that angle,
+%   apply to the axes. We just have to work a bit with the co-ordinate
+%   expansion.
 %    \begin{macrocode}
 \cs_new:Npn \draw_point_interpolate_arc:nnnnnn #1#2#3#4#5#6
   {