nx_collide2d_gate.nx

nx_collide2d_gate.nx -- liar-kill gate for the swept-collision part. Teeth map 1:1 onto the board's named bar for a physics-collision HAVE (nx_gamebench.nx bit-5 comment): T1 TUNNELING KILLED (swept/continuous): a mover faster than a thin wall per tick must STOP AT the wall, never appear beyond it. A discrete endpoint test passes straight through -- the mutation. T2 SLIDE: an oblique hit with rest=0 kills ONLY the normal component; motion continues along the surface (not stopped dead, not bounced). T3 RESTITUTION: a drop onto the floor with e=1/2 rebounds to ~e^2 of the drop height. T4 DETERMINISM: two identical 500-tick runs produce the identical independent position checksum. T5 BOUNDED: 10000 ticks of LCG-kicked flight inside a closed box NEVER escape it. T6 SAVE TRANSPARENCY: gs_save mid-flight -> ZEROED state -> gs_load -> resume; every later tick's independent ck identical to the uninterrupted run (GX-9 law: the walker is independent of the save path, so a save that forgets a field cannot vouch for itself). T7 ANTI-VACUITY: the mover actually moved and actually hit things (a frozen world passes the invariants above while simulating nothing). T8 CORNER: a diagonal shot into a corner resolves BOTH walls in ONE step (iterative TOI). license_tier: ORIGINAL expect_exit: 0