nx_softbody_region_gate.nx

nx_softbody_region_gate.nx -- gate for the BODY-REGION soft physics + THE OCCLUSION LAW. T1 GRAVITY PARAM: gmul_y=0 -> ring holds its rest shape exactly-ish; gmul_y=256 -> the bottom node sags measurably = the TittyMagic-class gravity knob is REAL data. T2 THE OCCLUSION LAW (the operator's ask, measured): a capsule pressed into the RIGHT of the ring -> (a) contact nodes held near the collider surface, (b) the FAR (left) nodes BULGE OUTWARD beyond rest (displaced volume redistributed = physics beyond the visible contact area), (c) capsule removed -> the ring RECOVERS to rest (elastic, no permanent dent). T3 VOLUME PROXY: cross-section area with the capsule embedded stays >= 85% of rest area WITH voldist, and beats the voldist=0 control (the knob does the conserving). T4 PARAMS ARE DATA: mass 256 vs 1024 -> different response speed; colsoft 256 vs 64 -> different depth. T5 determinism: two regions, same script -> byte-identical node state. + PNG knowledge/nx_region_occlusion.png: rest ring vs embedded-capsule ring, the BULGE visible. license_tier: ORIGINAL expect_exit: 0