#RaphLevien is back on #vector #curves years after #spiro release
https://raphlinus.github.io/curves/2018/12/08/euler-spiral.html

In the background, somewhere, #kcurves from #adobe
http://faculty.cs.tamu.edu/schaefer/research/kcurves.pdf
"κ-curve system was implemented as a tool in a commercial
illustration package, Adobe Illustrator. Adobe Illustrator is instrumented to report the amount of time users spend using each of the available tools. The new tool, called the “curvature” tool, is a direct competitor for the much older “pen” tool that uses cardinal splines. Even though there are experienced and exacting artists with many
years invested in the the pen tool, six months after the release of
the curvature tool 35% of the combined use of the two tools was with the newer curvature tool on desktop devices. On devices with touch screens, the curvature tool captured 66% of the combined use of the two tools. While more studies are needed to fully understand artists preferences, this usage data strongly suggests that our model
is a welcome addition to professional work–flows." #surveillance