Arrow & swoop marks

[tophtucker]

Mostly an exercise to familiarize myself with the code. Re-used some trigonometry I wrote in 2015!!

To-do

• both arrow and swoop feel pretty duplicative of link?? maybe that's life
• the thing where every arrowhead needs its own marker if there's a color is… rough
• configurable angle for swoop to subtend: should it be a channel?! how do those work…

[Fil]

both arrow and swoop feel pretty duplicative of link?? maybe that's life

you might try Swoop extends Link, and define only render()

the thing where every arrowhead needs its own marker if there's a color is… rough

it's possible to create the whole (swoopy or straight) arrow as a path; I've wasted a bit of time figuring out the tangent to the arc near the end point, but I think I got it working:
https://observablehq.com/d/c364dd180391294a

configurable angle for swoop

Or 2 angles (the swoop's and the arrowhead's sharpness), and a length (the arrowhead's maximal length).

[tophtucker]

love it fil! does extending Link preclude adding channels? i dont really understand how channels work

[Fil]

superseded by plugin https://observablehq.com/@data-workflows/plot-arrow