def angle_e0
import bend-prot@0.1.0.0/bonded.bend as Bondedimport Base
import bend-prot@0.1.0.0/geom.bend as G
93def angle_e0(pa: G.Vec3, pb: G.Vec3, mc: Maybe<&2, G.Vec3>, +k: F32, +eq: F32) -> F32:
94 match mc:
95 case None{}:
96 0.0
97 case Some{pc}:
98 angle_e(pa, pb, pc, k, eq)