- adaptive: skip layers with zero quadtree leaves in the connectivity
restriction and mesh-boundary loops (IndexError on boards where a
selected layer has no copper)
- board_io: accept ZT_TEARDROP zones as conducting copper (KiCad types
teardrop fills ZT_TEARDROP, never ZT_COPPER, so they were dropped)
- geometry: copper_bbox uses the exact stroke bbox (centerline extrema
+ half width) instead of a 100 um chord tessellation that could
undershoot arc/cap extrema past the raster guard margin
- solver/adaptive: reference |J| to the conduction-equivalent thickness
sigma*rho in every branch (the uniform branch used geometric t, so AC
plots changed scale ~rs_ratio depending on unrelated per-cell maps)
- solver/adaptive/raster: chain cells no longer show phantom sheet-face
currents; store dl per chain link and overlay the true 1D density
|dV|/(rho*dl) (exact at any frequency: AC scaling of link conductance
and cross-section cancels)
- test_quadtree: compare edge lists pair-for-pair (the independent
column sort destroyed endpoint association)
fill_resistance/quadtree.py decomposes a layer's fine copper mask into
2:1-balanced power-of-two leaves: boundary and keep-fine cells stay at
the fine size, interiors coarsen with their Chebyshev distance to the
nearest feature (guard factor, default 4), and an explicit enforcement
pass splits any leaf more than twice an edge-adjacent neighbor. Face
conductances use the series-half-cell rule, which reduces to the
production harmonic mean for equal sizes and EXACTLY to sigma in the
uniform limit - verified edge-for-edge against solver.build_edges and
to rel 1e-12 in R against run_solve, so the exact-value test suite
stays authoritative for this engine.
Measured (feature-dense 120x120 plate, h=50um, production AMG solver):
uniform 5.58M unknowns ~35s; adaptive guard=4 823k / ~8s at -1.1%;
guard=8 1.74M / ~12s at -0.47%. tools/adaptive_proto.py now benchmarks
the engine itself.
Not yet wired into the pipeline: phase 2 ports electrodes, barrels,
1D chains, buildup and field output onto leaves.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
grabowski
janik