nx_haircollide_gate.nx

nx_haircollide_gate.nx -- THE TOOTH THE COLLIDER OWED. Subject: vm_capsule_push (nx_vecmath) and hd_tick_collide (nx_hairdyn_lib), landed 2026-09-04 against the operator's REJECT row beach-hair-colour-wind-0830: "hair clips the body and moves like a mop, not strand by strand". WHY IT EXISTS AS ITS OWN GATE. nx_hairdyn_gate's teeth measure hd_tick, which this change DELIBERATELY left unchanged, so a GREEN from it would say nothing whatever about the collider -- the classic shape of a gate that is counted as coverage while being structurally blind to the thing shipped beside it. * A COMPILING CAPABILITY IS NOT A PROVEN ONE. The lib built clean hours before this file existed, and a clean build is exactly what an absent collider also produces, because absent code has no failure mode. THE ANTI-VACUITY TOOTH IS THE ncap=0 CONTROL: with no capsules the SAME seeded point must remain INSIDE the region a capsule would have covered. Without it, a collider that silently did nothing would pass every "is the point outside?" assertion whenever the seed happened to start outside, and a collider that pushed EVERYTHING would pass them all too -- which is why a positive control (a point outside is left ALONE) sits beside the deny tooth. A suite that only asks "was it pushed?" is blind in both directions. license_tier: ORIGINAL No hw writes (Rule 26). expect_exit: 0