Ryan Malloy
1599d181b5
Ports geometry/planar/TileShape.java (the border-line-based containment, area, and centre-of-gravity logic) and Simplex.java (a convex region as the intersection of directed half-planes). Corners are exact intersections of consecutive border lines; point containment uses exact side_of. The remove_redundant_lines normalization — dropping lines that do not contribute and detecting emptiness — is ported line-for-line. Supporting additions: Line.compare_to/__lt__ (angular sort order), Line.fast_equals, Line.side_of_intersection, Line.translate (perpendicular offset), IntDirection.determinant, and IntBox.to_simplex. offset is approximate (rounded translated lines, as upstream); enlarge clips to the enlarged bounding box pending the IntOctagon port. Since there is no JVM oracle, tests assert invariants: corners lie exactly on their border lines (exact side_of == 0), IntBox -> Simplex preserves the region over a sampled grid, intersection is contained in both operands and a point is in the result iff in both, and get_instance normalization drops redundant lines and detects empty half-plane pairs.
freeroute
A native Python PCB autorouter — a Java-free port of the FreeRouting engine.
Why
kicad-mcp currently autoroutes by shelling out to freerouting.jar, which
drags in a JVM dependency. freeroute reimplements the routing engine in
pure Python so the toolchain needs no Java at all.
The contract
The entire integration surface is two Specctra files:
board.dsn ──▶ freeroute ──▶ board.ses
(unrouted) (routed session: traces + vias)
kicad-cli already exports .dsn and imports .ses, so freeroute is a
drop-in replacement for the JAR step — nothing else in the pipeline changes.
Status
Pre-alpha. Under active development. See docs/PORTING_PLAN.md
for the architecture and porting roadmap.
Usage (target)
freeroute board.dsn -o board.ses
Development
uv sync
uv run pytest
uv run ruff check src/ tests/
License
GPL-3.0-or-later, matching the FreeRouting source it is ported from.