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* Residue templates can specify constraints

* Patched template generation preserves constraints

* Templates can match whole molecules

* addExtraParticles() supports molecule templates

* Documentation on molecule templates

* Bug fix

* Basic LCPO support

* Add basic test for LCPO from a prmtop file

* API for LCPOForce

* Started LCPO reference implementation

* Finished reference forces & test cases

* Use other test for finite difference since grid might have discontinuous forces

* Reference platform formatting

* Initial implementation of CPU platform

* Bugfixes

* More vectorization and improve neighbor list query speed

* Parallelize part of neighbor search

* Check box size for LCPO with periodic boundary conditions

* Fixes for updating parameters in context

* GBSAOBCForce doesn't use first & last indices for updates, so no need for this optimization here

* Changes to neighbor checking and optimization

* Fixes and minor changes

* Add global surface tension parameter

* Only process half of the pairs in the neighbor list

* Remove unnecessary checks

* Initial version of common platform implementation

* Asynchronously download neighbor list size

* Debugging

* Do pair precomputation in copyPairsToNeighborList

* Recompute interactions instead of scanning neighbor list in inner loop

* Condense position array before computations

* Also make neighbor count download asynchronous on device

* Fixes for kernel launching

* Topology-based LCPO parameter assignment

* Fixes, and use test system for LCPO with nucleic acids

* Always raise instead of warn when LCPO parameters can't be assigned

* Use Amber convention for phosphates

* Correct AmoebaAngleTorsion in test_Amoeba18Nucleic of TestForceField

* Update processTinkerForceField to handle latest .prm Tinker files

* Update amoeba2018 XML files

* Update amoeba2013 XML files

* Update amoeba2009 XML files

* Adapt addTorTor to new format in the .prm files

* Fix TorsionTorsion

* Also update the total energy in test_Amoeba18Nucleic

* Update amoebabio18.prm

* Fix nucleic acid test energies

* Correct AmoebaAngleTorsionForce params

* Add new addTorTor to TinkerFiles

* Revert unit fix

* Change to .pdb file which Tinker likes

* Update test_Amoeba18BPTI

* Remove trailing zeros from XML files

* Leave trailing zeros only on 2018 ff

* New element names in 2018

* More digits for surfaceAreaFactor

* More digits for surfaceAreaFactor

* More digits

* Remove debugging print

* Add support to 2009 and 2013 AMOEBA ffs to processTinkerForceField.py

* Add FF specific residues XML files

* Delete old residuesFinal.xml

* Update AMOEBA XML ffs

* Update FFs

* Fix some formatting issues

* Fix "." in scientific notation

* Remove old assertions

* Fresh branch refactoring the new AMOEBA code

* Finish cleaning up AmoebaAngleForce and AmoebaInPlaneAngleForce

* Cleanup AmoebaTorsionTorsionForce

* Cleanup AmoebaOutOfPlaneBend

* Cleanup AmoebaMultipoleForce

* Remove unnecessary gkForce

* Simplify usage of atomClasses in ForceField

* Formatting

* Fix type of class on WCA

* Simplify angle forces

* Add parsing of units to PiTorsion and StretchBond, and misc. formatting adjustments

* Update code per review feedback

* Clearly defined API for TorsionTorsion,  and correct matching for UB,

* Unindent break statements

* Raise ValueError if classes and types are mixed in a Urey-Bradley term definition

* Properly handle duplicate atom type definitions without elements

* Correct the description of a test in a docstring

* Correctly handle existing type without element and duplicate type with element

* Try to update actions/cache to v4

* Include more cases in TestForceField.test_NBFix

* Reduce LennardJonesGenerator NBFIX memory consumption

* Restored test case to use multiple elements to avoid ambiguity

* Can use getPlatform() instead of getPlatformByName()

* More concise arguments for getState()

* copy opc ions and opc*standard.xml from https://github.com/openmm/openmmforcefields/commit/b12c2e871b60275a10b3f8f56dfc2f6d5447591f

* auto-merged files

* move charges to residue definition

* remove unmerged files

* add docs

* rename U to U4+

* rename Ag+, Tl+, Gd3+ and I- residue names

* fix O-H bond length typo

* add opc3 constraints test

* Add benchmarks from Amber20 benchmark suite to standard benchmark script

* Add ensemble option; don't change hydrogen mass in amber input files

* Download and extract .tar.gz using pure python code, no wget/tar dependencies

* Rename amber tests

* add opc and opc3 models

* update to match https://bioinformatics.cs.vt.edu/~izadi/OPC_Gromacs/opc.top



* opc box, converted from ambertools-22.0-py38h6177452_1/dat/leap/lib/opcbox.off

* change values to make serialized system match one created from prmtop as close as possible

* unit test for opc water

* opc - final values, match frcmod.opc; derivation in comments

* opc3 water - final values, shows derivation

* opc3box made from ambertools 22 dat/leap/lib/opc3box.off

* add opc3 water test

* add opc and opc3 to docs

* move tests to TestForceField.py

* move opc tests out of amoeba tests, oops

* move opcbox and opc3box pdb files
Co-authored-by: Alex Izvorski <alex@genesistherapeutics.ai>

* Ensure bond lengths are set before creating forces that depend on them

* Minor formatting

* Reference implementation of computed values for CustomNonbondedForce

* CPU implementation of computed values for CustomNonbondedForce

* Common implementation of computed values for CustomNonbondedForce

* Serialization of computed values

* ForceField supports computed values

* Added GLYCAM

* Improved tests and documentation

* Fixed incorrect external bonds

* Adding support for new AMOEBA features

* Support modern method of specifying in-plane angles

* Implemented stretch-torsions

* Implemented angle-torsions

* More AMOEBA fixes

* Bug fix

* Converted AMOEBA 2018 force field

* Added documentation for AMOEBA 2018

* Added a missing file for tests

* Check for keyword args to createSystem() that are never used

* Fixed incorrect arguments in test cases

* Created OBC2 that works with current force fields

* Created HCT, OBC1, GBn, and GBn2 that works with current force fields

* Added documentation for GB models

* Updates to documentation and tests based on comments

* Added formula for screening parameter

* Top level Python module is now "openmm"

* Updated module names in examples

* Updated module names in documentation

* Updated module in CI scripts

* Added deprecation warning

* Made ordering of impropers more deterministic

* Fixed typo

* Do not alter mass of hydrogens in rigid water

* Do not alter mass of hydrogens in rigid water