OBMolTorsionIter Class Reference

Iterate over all torsions in an OBMol. More...

#include <openbabel/obiter.h>

List of all members.

Public Member Functions

 OBMolTorsionIter ()
 OBMolTorsionIter (OBMol *mol)
 OBMolTorsionIter (OBMol &mol)
 OBMolTorsionIter (const OBMolTorsionIter &ai)
 ~OBMolTorsionIter ()
OBMolTorsionIteroperator= (const OBMolTorsionIter &ai)
 operator bool () const
OBMolTorsionIteroperator++ ()
std::vector< unsigned int > operator* () const

Detailed Description

Iterate over all torsions in an OBMol.

Since:
version 2.1

To facilitate iteration through all torsions in a molecule, without resorting to atom indexes (which will change in the future), a variety of iterator methods are provided.

This has been made significantly easier by a series of macros in the obiter.h header file:

      \#define FOR_TORSIONS_OF_MOL(t,m)  for( OBMolTorsionIter   t(m); t; t++ )

Here is an example:

      #include <openbabel/obiter.h>
      #include <openbabel/mol.h>

      OBMol mol;
      OBAtom *a, *b, *c, *d;
      double tor;

      FOR_TORSIONS_OF_MOL(t, mol)
      {
         // The variable a behaves like OBTorsion* when used with -> and * but
         // but needs to be explicitly converted when appearing as a parameter
         // in a function call - use &*t

         a = _mol.GetAtom((*t)[0] + 1); // indices in vector start from 0!!!
         b = _mol.GetAtom((*t)[1] + 1);
         c = _mol.GetAtom((*t)[2] + 1);
         d = _mol.GetAtom((*t)[3] + 1);
         tor = mol.GetTorsion(a->GetIdx(), b->GetIdx(), c->GetIdx(), d->GetIdx());
      }

Constructor & Destructor Documentation

OBMolTorsionIter (  ) [inline]
OBMolTorsionIter ( OBMol mol )
OBMolTorsionIter ( OBMol mol )
~OBMolTorsionIter (  ) [inline]

Member Function Documentation

OBMolTorsionIter & operator= ( const OBMolTorsionIter ai )
operator bool (  ) const [inline]
Returns:
Whether the iterator can still advance (i.e., visit more torsions)
OBMolTorsionIter & operator++ (  )

Preincrement -- advance to the next torsion and return.

std::vector<unsigned int> operator* (  ) const [inline]
Returns:
A vector of four atom indexes specifying the torsion
See also:
OBAtom::GetIdx()

The documentation for this class was generated from the following files:
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