def bond_cov_look1
import bend-prot@0.1.0.0/bonded.bend as Bondedimport Base
import bend-prot@0.1.0.0/geom.bend as G
65def bond_cov_look1(pa: G.Vec3, ea: U32, mb: Maybe<&1, G.Vec3 & U32>, +k: F32) -> F32:
66 match mb:
67 case None{}:
68 0.0
69 case Some{(pb, eb)}:
70 bond_e(pa, pb, k, (cov_rad(ea) + cov_rad(eb) : F32))