---

ObjCryst::Molecule::FlipGroup Struct Reference

When 3(A1..1n) or more atoms are connected to a same atom A, it defines a 'flip' group, where it is possible to rotate bonds to their symmetric with respect to one plane defined by atoms Ai-A-Aj. More...

List of all members.

Public Methods
	FlipGroup (const MolAtom &at0, const MolAtom &at1, const MolAtom &at2)
	Constructor, with the central atom.
Public Attributes
const MolAtom *	mpAtom0
	The atom which is an asymmetric center.
const MolAtom *	mpAtom1
	The first atom defining the rotation axis.
const MolAtom *	mpAtom2
	The second atom defining the rotation axis.
list< pair< const MolAtom *, set< unsigned long > > >	mvRotatedChainList
	The set of atoms that are to be rotated during the flip.
unsigned long	mNbTest
	Number of times this flip has been tried, and the number of times it has been accepted.
unsigned long	mNbAccept
	Number of times this flip has been tried, and the number of times it has been accepted.

---

Detailed Description

When 3(A1..1n) or more atoms are connected to a same atom A, it defines a 'flip' group, where it is possible to rotate bonds to their symmetric with respect to one plane defined by atoms Ai-A-Aj.

This is useful to flip the absolute configuration for asymmetric centers. Note that the bond is only rotated, so that the entire group is not mirrored (no absolute configuration is broken in the group).

Also, a FlipGroup can correspond to a 180° rotation exchanging Ai and Aj (rotating the two chains around the bissecting angle of bonds A-Ai and A-Aj)

---

Member Data Documentation

unsigned long ObjCryst::Molecule::FlipGroup::mNbAccept

Number of times this flip has been tried, and the number of times it has been accepted. Used in Molecule::GlobalOptRandomMove, to avoid flips that break some restraint (and deciding which flips break some restraint is difficult before having a real conformation).

unsigned long ObjCryst::Molecule::FlipGroup::mNbTest

Number of times this flip has been tried, and the number of times it has been accepted. Used in Molecule::GlobalOptRandomMove, to avoid flips that break some restraint (and deciding which flips break some restraint is difficult before having a real conformation).

list<pair<const MolAtom *,set<unsigned long> > > ObjCryst::Molecule::FlipGroup::mvRotatedChainList

The set of atoms that are to be rotated during the flip. The first atom is the one bonded to the central atom, whose bond will be flipped with respect to the plane defined by (at1,at0,at2). However, if this atom is identical to mpAtom0, then this indicates that a 180° rotation exchanging atom1 and atom2 is to be performed.

---

The documentation for this struct was generated from the following file:

• Molecule.h

---