The router began as a port of FreeRouting and has grown its own engine
(negotiated congestion, tree nets, exact checks, axis escapes), and
'freeroute' was one letter from the project it no longer follows. The
package, module and command are now rpmroute; the freeroute command stays
as an alias, and the RPMROUTE / RPMROUTE_ORACLE_JAVA variables fall back
to the old FREEROUTE names. Version 2026.10.07. Routing is unchanged: a
PCBench board routes to a byte-identical session either way.
Ports IntBox, the simplest concrete convex tile (RegularTileShape): exact
integer-corner rectangle with contains (border-inclusive and interior),
intersection, union, intersects/overlaps, offset (round half up),
horizontal/vertical offset, shrink, box containment, translate, and
dimension. Adds the package __init__ exporting the geometry API.
The general convex machinery beyond IntBox — TileShape/Simplex/IntOctagon
and polygon split_to_convex — is deferred to the next geometry phase.
Tests cover boundary vs interior containment, degenerate tiles
(empty/point/segment), edge-touching intersects-vs-overlaps, rational
point on a border, and half-up offset rounding.
rsp2k