vellum 0.5.1
Patch release.
Bug fixes
sector_grob()andloop_grob()no longer render vertically mirrored (#14). Sector arcs were built directly in the y-down device frame (cy + r·sin θ) while every other primitive maps coordinates through the y-up native frame, so a sector drawn at angleθlanded where the others would place−θ— the documented "0 at 3 o'clock, counter-clockwise" contract was mirrored across the horizontal axis. A centroid label/point overlaid on a pie / donut / rose / sunburst therefore sat on the mirror image of its wedge. Sector fills, strokes, arrowheads, and hand-drawn (sketch=) wedges — andloop_grob()'s teardropangle, which shared the same convention — now all honour the y-up angle contract.
Full changelog: v0.5.0...v0.5.1