Examples using SMIRNOFF with the toolkit

The following examples are available in the openforcefield toolkit repository:

Index of provided examples

  • SMIRNOFF_simulation - simulation of a molecule in the gas phase with the SMIRNOFF forcefield format

  • forcefield_modification - modify forcefield parameters and evaluate how system energy changes

  • using_smirnoff_in_amber_or_gromacs - convert a System generated with the Open Forcefield Toolkit, which can be simulated natively with OpenMM, into AMBER prmtop/inpcrd and GROMACS top/gro input files through the ParmEd library.

  • swap_amber_parameters - take a prepared AMBER protein-ligand system (prmtop and crd) along with a structure file of the ligand, and replace ligand parameters with OpenFF parameters.

  • inspect_assigned_parameters - check which parameters are used in which molecules and generate parameter usage statistics.

  • using_smirnoff_with_amber_protein_forcefield - use SMIRNOFF parameters for small molecules in combination with more conventional force fields for proteins and other components of your system (using ParmEd to combine parameterized structures)

  • check_dataset_parameter_coverage - shows how to use the Open Force Field Toolkit to ingest a dataset of molecules, and generate a report summarizing any chemistry that can not be parameterized.