nx_sim_coverage.nx

nx_sim_coverage.nx -- GENERIC tool-vs-target coverage / efficiency simulation (sovereign, pure integer). Answers "does the tool actually reach + conform to the surface where it matters, and how much of what matters does it service?" Tool/target-agnostic by construction: * toilet cleaner vs under-rim black-mold (clean the deep, near-vertical rim underside) * massager vs a human body (knead the high-tension, contoured regions) ... are the SAME engine with different site lists + tool params. TARGET = parallel arrays over n sites: depth[i] -- how far into the recess the site sits (mm); a tool must REACH this depth. slope[i] -- local surface angle in degrees (0 = flat/horizontal .. 90 = vertical); a tool's working face must CONFORM to this angle to actually scrub/press there. value[i] -- how much it matters to service this site (mold concentration / muscle tension). TOOL = a working face that can present any tilt in [tilt_lo, tilt_hi], reaches depth <= reach_max, and conforms to a surface within +/- conform_tol degrees. serviced(site) = (depth <= reach_max) AND ([tilt_lo,tilt_hi] intersects [slope-tol, slope+tol]). EFFICIENCY (permil 0..1000) = 1000 * sum(value | serviced) / sum(value). This is a first-order GEOMETRIC reachability+conformance model, not full contact physics -- the honest scope. license_tier: ORIGINAL