Draw dashed lines only for arcs, not for paths
Draw dashed lines only for arcs, not for paths

Curved paths do not lie on the dashed guiding lines, so it's not much
useful.

Arcs, on the other hand, doesn't use cubic Bezier control points,
so drawing guiding lines will help.

Other shapes such as rectangles or lines do not need it, too.

msakuta/SketchCanvas,msakuta/SketchCanvas,msakuta/SketchCanvas