class PerturbDistanceAngle : public feasst::PerturbDistance

Put first site in selection, i, in a truncated conical shell that is formed by the intersection of a spherical shell about the first site in the anchor, and a conical shell with axis of symmetry along the vector connecting the first anchor site to the second anchor site. For angle potentials, the equilibrium angle and spring constant are as described in Random::bond_angle Currently implemented for harmonic bonds (exponent: 2), but could add an optional exponent model parameter to generalize this in the future.

Subclassed by feasst::PerturbDihedral, feasst::PerturbDistanceAngleConnector