Extra visualization-only geometry entities — added Disk, PartialDisk,
Box, Ellipsoid, Ellipse, and RegularPolygon (plus a regular_polygon()
factory) to pytanga.geometry. Like Cylinder/Arc, they have no
multivector representation and exist purely as rendering hints. Planar
shapes default to the xy-plane (normal = +z), so they work in both the 2D
and 3D viewers.
Mesh styles for the new entities — added DiskStyle, PartialDiskStyle,
BoxStyle, EllipsoidStyle, EllipseStyle, and RegularPolygonStyle with
canonical defaults and per-entity slab thickness knobs, wired through the
standard Three.js viewer and static HTML export.
SDF support for the new entities — Disk→cappedCylinder,
Box→box, Ellipsoid/Ellipse→ellipsoid, and two new SDF primitives
(partialDisk, regularPolygon) with matching GLSL and JS emitters. Added
per-entity SdfDiskStyle, SdfPartialDiskStyle, SdfBoxStyle,
SdfEllipsoidStyle, SdfEllipseStyle, and SdfRegularPolygonStyle, so every
new solid renders as a ray-marched SDF object via SdfObject(...).
Analytic edge anti-aliasing for ray-marched SDF objects — the standard
viewer's per-object SDF proxy now tracks the closest-approach distance during
the march and fades the ~1px silhouette edge (screen-space derivative +
smoothstep) instead of a hard discard. Added an antialias knob to
SdfStyle (disabled by default pending further investigation of silhouette
artifacts) to opt back in.