Large Arc Lab
Screen radius (px)
Zoom transform
Sweep (degrees)
Representation
SVG arc
Adaptive plan
Fixed 22° rule
Split SVG arc
Quarter-turn cubics
Render comparison
Toggle paint difference
Compare the visible edge with the screen-space reference. Hit-test error is diagnostic; it is not a reliable paint oracle for flat cubics. Read README.md for the experiment.
bigpath: __run({Rpx, k, sweepDeg | chord, rep}) / __matrix()