Overlap (penetration) depth of a clash in metres, always >= 0.
A hard clash carries a signeddistance (< 0 = interpenetration), so
its depth is -distance. clearance/touch clashes are separated (no
penetration) and report depth 0. This is the right key for "sort by how
badly things overlap" (#1274).
Overlap (penetration) depth of a clash in metres, always
>= 0.A
hardclash carries a signeddistance(< 0= interpenetration), so its depth is-distance.clearance/touchclashes are separated (no penetration) and report depth0. This is the right key for "sort by how badly things overlap" (#1274).