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Commit 84c9bcdb authored by peastman's avatar peastman
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Cleanup and simplification to reference AMOEBA multipole force

parent f816d961
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Showing with 81 additions and 324 deletions
plugins/amoeba/platforms/reference/src/SimTKReference/AmoebaReferenceMultipoleForce.cpp
View file @ 84c9bcdb
......@@ -95,8 +95,6 @@ void AmoebaReferenceMultipoleForce::initialize()
_uScale[index++] = 1.0;
_uScale[index++] = 1.0;
_uScale[index++] = 1.0;
return;
}
AmoebaReferenceMultipoleForce::NonbondedMethod AmoebaReferenceMultipoleForce::getNonbondedMethod() const
......@@ -288,7 +286,6 @@ void AmoebaReferenceMultipoleForce::copyRealVecVector(const vector<OpenMM::RealV
for (unsigned int ii = 0; ii < inputVector.size(); ii++) {
outputVector[ii] = inputVector[ii];
}
return;
}
void AmoebaReferenceMultipoleForce::loadParticleData(const vector<RealVec>& particlePositions,
......@@ -354,8 +351,6 @@ void AmoebaReferenceMultipoleForce::checkChiralCenterAtParticle(MultipoleParticl
particleI.quadrupole[QXY] *= -1.0; // pole(6,i) && pole(8,i)
particleI.quadrupole[QYZ] *= -1.0; // pole(10,i) && pole(12,i)
}
return;
}
void AmoebaReferenceMultipoleForce::checkChiral(vector<MultipoleParticleData>& particleData,
......@@ -373,7 +368,6 @@ void AmoebaReferenceMultipoleForce::checkChiral(vector<MultipoleParticleData>& p
particleData[multipoleAtomYs[ii]]);
}
}
return;
}
void AmoebaReferenceMultipoleForce::applyRotationMatrixToParticle( MultipoleParticleData& particleI,
......@@ -497,9 +491,6 @@ void AmoebaReferenceMultipoleForce::applyRotationMatrixToParticle( Multipol
particleI.quadrupole[QYY] = rPole[1][1];
particleI.quadrupole[QYZ] = rPole[1][2];
particleI.quadrupole[QZZ] = rPole[2][2];
return;
}
void AmoebaReferenceMultipoleForce::applyRotationMatrix(vector<MultipoleParticleData>& particleData,
......@@ -515,8 +506,6 @@ void AmoebaReferenceMultipoleForce::applyRotationMatrix(vector<MultipoleParticle
multipoleAtomYs[ii] > -1 ? &particleData[multipoleAtomYs[ii]] : NULL, axisTypes[ii]);
}
}
return;
}
void AmoebaReferenceMultipoleForce::getAndScaleInverseRs(RealOpenMM dampI, RealOpenMM dampJ,
......@@ -551,7 +540,6 @@ void AmoebaReferenceMultipoleForce::getAndScaleInverseRs(RealOpenMM dampI, RealO
}
}
}
return;
}
void AmoebaReferenceMultipoleForce::calculateFixedMultipoleFieldPairIxn(const MultipoleParticleData& particleI,
......@@ -559,7 +547,8 @@ void AmoebaReferenceMultipoleForce::calculateFixedMultipoleFieldPairIxn(const Mu
RealOpenMM dScale, RealOpenMM pScale)
{
if (particleI.particleIndex == particleJ.particleIndex)return;
if (particleI.particleIndex == particleJ.particleIndex)
return;
RealVec deltaR = particleJ.position - particleI.position;
RealOpenMM r = SQRT(deltaR.dot(deltaR));
......@@ -605,8 +594,6 @@ void AmoebaReferenceMultipoleForce::calculateFixedMultipoleFieldPairIxn(const Mu
particleIndex = particleJ.particleIndex;
_fixedMultipoleField[particleIndex] += field*dScale;
_fixedMultipoleFieldPolar[particleIndex] += field*pScale;
return;
}
void AmoebaReferenceMultipoleForce::calculateFixedMultipoleField(const vector<MultipoleParticleData>& particleData)
......@@ -632,7 +619,6 @@ void AmoebaReferenceMultipoleForce::calculateFixedMultipoleField(const vector<Mu
calculateFixedMultipoleFieldPairIxn(particleData[ii], particleData[jj], dScale, pScale);
}
}
return;
}
void AmoebaReferenceMultipoleForce::initializeInducedDipoles(vector<UpdateInducedDipoleFieldStruct>& updateInducedDipoleFields)
......@@ -647,8 +633,6 @@ void AmoebaReferenceMultipoleForce::initializeInducedDipoles(vector<UpdateInduce
_inducedDipole[ii] = _fixedMultipoleField[ii];
_inducedDipolePolar[ii] = _fixedMultipoleFieldPolar[ii];
}
return;
}
void AmoebaReferenceMultipoleForce::calculateInducedDipolePairIxn(unsigned int particleI,
......@@ -664,8 +648,6 @@ void AmoebaReferenceMultipoleForce::calculateInducedDipolePairIxn(unsigned int p
field[particleI] += inducedDipole[particleJ]*rr3 + deltaR*dDotDelta;
dDotDelta = rr5*(inducedDipole[particleI].dot(deltaR));
field[particleJ] += inducedDipole[particleI]*rr3 + deltaR*dDotDelta;
return;
}
void AmoebaReferenceMultipoleForce::calculateInducedDipolePairIxns(const MultipoleParticleData& particleI,
......@@ -673,7 +655,8 @@ void AmoebaReferenceMultipoleForce::calculateInducedDipolePairIxns(const Multipo
vector<UpdateInducedDipoleFieldStruct>& updateInducedDipoleFields)
{
if (particleI.particleIndex == particleJ.particleIndex)return;
if (particleI.particleIndex == particleJ.particleIndex)
return;
RealVec deltaR = particleJ.position - particleI.position;
RealOpenMM r = SQRT(deltaR.dot(deltaR));
......@@ -689,8 +672,6 @@ void AmoebaReferenceMultipoleForce::calculateInducedDipolePairIxns(const Multipo
calculateInducedDipolePairIxn(particleI.particleIndex, particleJ.particleIndex, rr3, rr5, deltaR,
*updateInducedDipoleFields[ii].inducedDipoles, updateInducedDipoleFields[ii].inducedDipoleField);
}
return;
}
void AmoebaReferenceMultipoleForce::calculateInducedDipoleFields(const vector<MultipoleParticleData>& particleData, vector<UpdateInducedDipoleFieldStruct>& updateInducedDipoleFields) {
......@@ -705,7 +686,6 @@ void AmoebaReferenceMultipoleForce::calculateInducedDipoleFields(const vector<Mu
for (unsigned int ii = 0; ii < particleData.size(); ii++)
for (unsigned int jj = ii; jj < particleData.size(); jj++)
calculateInducedDipolePairIxns(particleData[ii], particleData[jj], updateInducedDipoleFields);
return;
}
RealOpenMM AmoebaReferenceMultipoleForce::updateInducedDipoleFields(const vector<MultipoleParticleData>& particleData,
......@@ -777,8 +757,6 @@ void AmoebaReferenceMultipoleForce::convergeInduceDipolesBySOR(const vector<Mult
}
setMutualInducedDipoleEpsilon(currentEpsilon);
setMutualInducedDipoleIterations(iteration);
return;
}
void AmoebaReferenceMultipoleForce::convergeInduceDipolesByDIIS(const vector<MultipoleParticleData>& particleData, vector<UpdateInducedDipoleFieldStruct>& updateInducedDipoleField) {
......@@ -921,8 +899,6 @@ void AmoebaReferenceMultipoleForce::calculateInducedDipoles(const vector<Multipo
// due to other induced dipoles at each site
convergeInduceDipolesByDIIS(particleData, updateInducedDipoleField);
return;
}
RealOpenMM AmoebaReferenceMultipoleForce::calculateElectrostaticPairIxn(const MultipoleParticleData& particleI,
......@@ -1499,9 +1475,6 @@ void AmoebaReferenceMultipoleForce::mapTorqueToForceForParticle(const MultipoleP
forces[particleI.particleIndex][ii] += du;
}
}
return;
}
void AmoebaReferenceMultipoleForce::mapTorqueToForce(vector<MultipoleParticleData>& particleData,
......@@ -1523,7 +1496,6 @@ void AmoebaReferenceMultipoleForce::mapTorqueToForce(vector<MultipoleParticleDat
axisTypes[ii], torques[ii], forces);
}
}
return;
}
RealOpenMM AmoebaReferenceMultipoleForce::calculateElectrostatic(const vector<MultipoleParticleData>& particleData,
......@@ -1601,8 +1573,6 @@ void AmoebaReferenceMultipoleForce::setup(const vector<RealVec>& particlePositio
message << " eps=" << getMutualInducedDipoleEpsilon();
throw OpenMMException(message.str());
}
return;
}
RealOpenMM AmoebaReferenceMultipoleForce::calculateForceAndEnergy(const vector<RealVec>& particlePositions,
......@@ -1772,8 +1742,6 @@ void AmoebaReferenceMultipoleForce::calculateAmoebaSystemMultipoleMoments(const
for (unsigned int ii = 4; ii < 13; ii++) {
outputMultipoleMoments[ii] *= 100.0*debye;
}
return;
}
RealOpenMM AmoebaReferenceMultipoleForce::calculateElectrostaticPotentialForParticleGridPoint(const MultipoleParticleData& particleI, const RealVec& gridPoint) const
......@@ -1847,8 +1815,6 @@ void AmoebaReferenceMultipoleForce::calculateElectrostaticPotential(const vector
for (unsigned int ii = 0; ii < grid.size(); ii++) {
potential[ii] *= term;
}
return;
}
AmoebaReferenceMultipoleForce::UpdateInducedDipoleFieldStruct::UpdateInducedDipoleFieldStruct(vector<OpenMM::RealVec>& inputFixed_E_Field, vector<OpenMM::RealVec>& inputInducedDipoles) :
......@@ -2143,8 +2109,6 @@ void AmoebaReferenceGeneralizedKirkwoodMultipoleForce::calculateFixedMultipoleFi
if (particleI.particleIndex != particleJ.particleIndex) {
_gkField[particleJ.particleIndex] += fjd;
}
return;
}
void AmoebaReferenceGeneralizedKirkwoodMultipoleForce::calculateInducedDipolePairGkIxn(const MultipoleParticleData& particleI,
......@@ -2218,8 +2182,6 @@ void AmoebaReferenceGeneralizedKirkwoodMultipoleForce::calculateInducedDipolePai
outputFields[jIndex][1] += _fd*duis.dot(guy);
outputFields[jIndex][2] += _fd*duis.dot(guz);
}
return;
}
void AmoebaReferenceGeneralizedKirkwoodMultipoleForce::calculateInducedDipolePairIxns(const MultipoleParticleData& particleI,
......@@ -2234,8 +2196,6 @@ void AmoebaReferenceGeneralizedKirkwoodMultipoleForce::calculateInducedDipolePai
for (unsigned int ii = 2; ii < updateInducedDipoleFields.size(); ii++) {
calculateInducedDipolePairGkIxn(particleI, particleJ, *updateInducedDipoleFields[ii].inducedDipoles, updateInducedDipoleFields[ii].inducedDipoleField);
}
return;
}
void AmoebaReferenceGeneralizedKirkwoodMultipoleForce::calculateInducedDipoles(const vector<MultipoleParticleData>& particleData)
......@@ -2282,8 +2242,6 @@ void AmoebaReferenceGeneralizedKirkwoodMultipoleForce::calculateInducedDipoles(c
updateInducedDipoleField.push_back(UpdateInducedDipoleFieldStruct(gkFieldPolar, _inducedDipolePolarS));
convergeInduceDipolesByDIIS(particleData, updateInducedDipoleField);
return;
}
RealOpenMM AmoebaReferenceGeneralizedKirkwoodMultipoleForce::calculateKirkwoodPairIxn(const MultipoleParticleData& particleI,
......@@ -3816,8 +3774,6 @@ void AmoebaReferenceGeneralizedKirkwoodMultipoleForce::calculateGrycukChainRuleP
forces[iIndex] -= deltaR*de;
forces[jIndex] += deltaR*de;
return;
}
RealOpenMM AmoebaReferenceGeneralizedKirkwoodMultipoleForce::calculateCavityTermEnergyAndForces(vector<RealOpenMM>& dBorn) const
......@@ -4556,8 +4512,6 @@ void AmoebaReferencePmeMultipoleForce::getPmeGridDimensions(vector<int>& pmeGrid
pmeGridDimensions[0] = _pmeGridDimensions[0];
pmeGridDimensions[1] = _pmeGridDimensions[1];
pmeGridDimensions[2] = _pmeGridDimensions[2];
return;
};
void AmoebaReferencePmeMultipoleForce::setPmeGridDimensions(vector<int>& pmeGridDimensions)
......@@ -4565,7 +4519,8 @@ void AmoebaReferencePmeMultipoleForce::setPmeGridDimensions(vector<int>& pmeGrid
if ((pmeGridDimensions[0] == _pmeGridDimensions[0]) &&
(pmeGridDimensions[1] == _pmeGridDimensions[1]) &&
(pmeGridDimensions[2] == _pmeGridDimensions[2]))return;
(pmeGridDimensions[2] == _pmeGridDimensions[2]))
return;
if (_fftplan) {
fftpack_destroy(_fftplan);
......@@ -4626,21 +4581,16 @@ void AmoebaReferencePmeMultipoleForce::resizePmeArrays()
_phid.resize(10*_numParticles);
_phip.resize(10*_numParticles);
_phidp.resize(20*_numParticles);
_pmeAtomRange.resize(_totalGridSize + 1);
_pmeAtomGridIndex.resize(_numParticles);
return;
}
void AmoebaReferencePmeMultipoleForce::initializePmeGrid()
{
if (_pmeGrid == NULL)return;
//memset(_pmeGrid, 0, sizeof(t_complex)*_totalGridSize);
if (_pmeGrid == NULL)
return;
for (int jj = 0; jj < _totalGridSize; jj++) {
_pmeGrid[jj].re = _pmeGrid[jj].im = 0.0;
}
return;
}
void AmoebaReferencePmeMultipoleForce::getPeriodicDelta(RealVec& deltaR) const
......@@ -4692,8 +4642,6 @@ void AmoebaReferencePmeMultipoleForce::getDampedInverseDistances(const Multipole
dampedPInverseDistances[1] = 3.0*(1.0-dampedPScale[1])/r5;
dampedPInverseDistances[2] = 15.0*(1.0-dampedPScale[2])/r7;
}
return;
}
void AmoebaReferencePmeMultipoleForce::initializeBSplineModuli()
......@@ -4786,8 +4734,6 @@ void AmoebaReferencePmeMultipoleForce::initializeBSplineModuli()
_pmeBsplineModuli[dim][i-1] = _pmeBsplineModuli[dim][i-1]*(zeta*zeta);
}
}
return;
}
void AmoebaReferencePmeMultipoleForce::calculateFixedMultipoleFieldPairIxn(const MultipoleParticleData& particleI,
......@@ -4797,13 +4743,15 @@ void AmoebaReferencePmeMultipoleForce::calculateFixedMultipoleFieldPairIxn(const
// compute the real space portion of the Ewald summation
if (particleI.particleIndex == particleJ.particleIndex)return;
if (particleI.particleIndex == particleJ.particleIndex)
return;
RealVec deltaR = particleJ.position - particleI.position;
getPeriodicDelta(deltaR);
RealOpenMM r2 = deltaR.dot(deltaR);
if (r2 > _cutoffDistanceSquared)return;
if (r2 > _cutoffDistanceSquared)
return;
RealOpenMM r = SQRT(r2);
......@@ -4875,8 +4823,6 @@ void AmoebaReferencePmeMultipoleForce::calculateFixedMultipoleFieldPairIxn(const
_fixedMultipoleFieldPolar[iIndex] += fim - fip;
_fixedMultipoleFieldPolar[jIndex] += fjm - fjp;
return;
}
void AmoebaReferencePmeMultipoleForce::calculateFixedMultipoleField(const vector<MultipoleParticleData>& particleData)
......@@ -4886,8 +4832,6 @@ void AmoebaReferencePmeMultipoleForce::calculateFixedMultipoleField(const vector
resizePmeArrays();
computeAmoebaBsplines(particleData);
sort(_pmeAtomGridIndex.begin(), _pmeAtomGridIndex.end(), compareInt2);
findAmoebaAtomRangeForGrid(particleData);
initializePmeGrid();
spreadFixedMultipolesOntoGrid(particleData);
fftpack_exec_3d(_fftplan, FFTPACK_FORWARD, _pmeGrid, _pmeGrid);
......@@ -4909,8 +4853,6 @@ void AmoebaReferencePmeMultipoleForce::calculateFixedMultipoleField(const vector
// include direct space fixed multipole fields
this->AmoebaReferenceMultipoleForce::calculateFixedMultipoleField(particleData);
return;
}
#define ARRAY(x,y) array[(x)-1+((y)-1)*AMOEBA_PME_ORDER]
......@@ -4987,8 +4929,6 @@ void AmoebaReferencePmeMultipoleForce::computeBSplinePoint(vector<RealOpenMM4>&
for (int i = 1; i <= AMOEBA_PME_ORDER; i++) {
thetai[i-1] = RealOpenMM4(ARRAY(AMOEBA_PME_ORDER,i), ARRAY(AMOEBA_PME_ORDER-1,i), ARRAY(AMOEBA_PME_ORDER-2,i), ARRAY(AMOEBA_PME_ORDER-3,i));
}
return;
}
/**
......@@ -4996,7 +4936,6 @@ void AmoebaReferencePmeMultipoleForce::computeBSplinePoint(vector<RealOpenMM4>&
*/
void AmoebaReferencePmeMultipoleForce::computeAmoebaBsplines(const vector<MultipoleParticleData>& particleData)
{
// get the B-spline coefficients for each multipole site
for (unsigned int ii = 0; ii < _numParticles; ii++) {
......@@ -5021,102 +4960,7 @@ void AmoebaReferencePmeMultipoleForce::computeAmoebaBsplines(const vector<Multip
// Record the grid point.
_iGrid[ii] = igrid;
_pmeAtomGridIndex[ii] = int2(ii, igrid[0]*_pmeGridDimensions[1]*_pmeGridDimensions[2] + igrid[1]*_pmeGridDimensions[2] + igrid[2]);
}
return;
}
/**
* For each grid point, find the range of sorted atoms associated with that point.
*/
void AmoebaReferencePmeMultipoleForce::findAmoebaAtomRangeForGrid(const vector<MultipoleParticleData>& particleData)
{
int last;
int start = 0;
last = (start == 0 ? -1 : _pmeAtomGridIndex[start-1][1]);
for (unsigned int ii = start; ii < _numParticles; ++ii) {
int2 atomData = _pmeAtomGridIndex[ii];
int gridIndex = atomData[1];
if (gridIndex != last)
{
for (int jj = last+1; jj <= gridIndex; ++jj) {
_pmeAtomRange[jj] = ii;
}
last = gridIndex;
}
}
// Fill in values beyond the last atom.
for (int j = last+1; j <= _totalGridSize; ++j) {
_pmeAtomRange[j] = _numParticles;
}
// The grid index won't be needed again. Reuse that component to hold the z index, thus saving
// some work in the multipole spreading.
for (unsigned int ii = 0; ii < _numParticles; ii++) {
RealOpenMM posz = particleData[_pmeAtomGridIndex[ii][0]].position[2];
posz -= FLOOR(posz*_recipBoxVectors[2][2])*_periodicBoxVectors[2][2];
RealOpenMM w = posz*_recipBoxVectors[2][2];
RealOpenMM fr = _pmeGridDimensions[2]*(w-(int)(w+0.5)+0.5);
int z = (static_cast<int>(fr)) - AMOEBA_PME_ORDER + 1;
_pmeAtomGridIndex[ii][1] = z;
}
return;
}
void AmoebaReferencePmeMultipoleForce::getGridPointGivenGridIndex(int gridIndex, IntVec& gridPoint) const
{
gridPoint[0] = gridIndex/(_pmeGridDimensions[1]*_pmeGridDimensions[2]);
int remainder = gridIndex-gridPoint[0]*_pmeGridDimensions[1]*_pmeGridDimensions[2];
gridPoint[1] = remainder/_pmeGridDimensions[2];
gridPoint[2] = remainder-gridPoint[1]*_pmeGridDimensions[2];
return;
}
RealOpenMM AmoebaReferencePmeMultipoleForce::computeFixedMultipolesGridValue(const int2& particleGridIndices,
int ix, int iy, const IntVec& gridPoint) const
{
RealOpenMM gridValue = 0.0;
for (int i = _pmeAtomRange[particleGridIndices[0]]; i < _pmeAtomRange[particleGridIndices[1]+1]; ++i) {
int2 atomData = _pmeAtomGridIndex[i];
int atomIndex = atomData[0];
int z = atomData[1];
int iz = gridPoint[2]-z+(gridPoint[2] >= z ? 0 : _pmeGridDimensions[2]);
if (iz >= _pmeGridDimensions[2]) {
iz -= _pmeGridDimensions[2];
}
RealOpenMM atomCharge = _transformed[atomIndex].charge;
RealVec atomDipole = RealVec(_transformed[atomIndex].dipole[0],
_transformed[atomIndex].dipole[1],
_transformed[atomIndex].dipole[2]);
RealOpenMM atomQuadrupoleXX = _transformed[atomIndex].quadrupole[QXX];
RealOpenMM atomQuadrupoleXY = _transformed[atomIndex].quadrupole[QXY];
RealOpenMM atomQuadrupoleXZ = _transformed[atomIndex].quadrupole[QXZ];
RealOpenMM atomQuadrupoleYY = _transformed[atomIndex].quadrupole[QYY];
RealOpenMM atomQuadrupoleYZ = _transformed[atomIndex].quadrupole[QYZ];
RealOpenMM atomQuadrupoleZZ = _transformed[atomIndex].quadrupole[QZZ];
RealOpenMM4 t = _thetai[0][atomIndex*AMOEBA_PME_ORDER+ix];
RealOpenMM4 u = _thetai[1][atomIndex*AMOEBA_PME_ORDER+iy];
RealOpenMM4 v = _thetai[2][atomIndex*AMOEBA_PME_ORDER+iz];
RealOpenMM term0 = atomCharge*u[0]*v[0] + atomDipole[1]*u[1]*v[0] + atomDipole[2]*u[0]*v[1] + atomQuadrupoleYY*u[2]*v[0] + atomQuadrupoleZZ*u[0]*v[2] + atomQuadrupoleYZ*u[1]*v[1];
RealOpenMM term1 = atomDipole[0]*u[0]*v[0] + atomQuadrupoleXY*u[1]*v[0] + atomQuadrupoleXZ*u[0]*v[1];
RealOpenMM term2 = atomQuadrupoleXX * u[0] * v[0];
gridValue += term0*t[0] + term1*t[1] + term2*t[2];
}
return gridValue;
}
void AmoebaReferencePmeMultipoleForce::transformMultipolesToFractionalCoordinates(const vector<MultipoleParticleData>& particleData) {
......@@ -5200,38 +5044,44 @@ void AmoebaReferencePmeMultipoleForce::spreadFixedMultipolesOntoGrid(const vecto
transformMultipolesToFractionalCoordinates(particleData);
for (int gridIndex = 0; gridIndex < _totalGridSize; gridIndex++) {
IntVec gridPoint;
getGridPointGivenGridIndex(gridIndex, gridPoint);
RealOpenMM result = 0.0;
for (int ix = 0; ix < AMOEBA_PME_ORDER; ++ix)
{
int x = gridPoint[0]-ix+(gridPoint[0] >= ix ? 0 : _pmeGridDimensions[0]);
for (int iy = 0; iy < AMOEBA_PME_ORDER; ++iy)
{
int y = gridPoint[1]-iy+(gridPoint[1] >= iy ? 0 : _pmeGridDimensions[1]);
int z1 = gridPoint[2]-AMOEBA_PME_ORDER+1;
z1 += (z1 >= 0 ? 0 : _pmeGridDimensions[2]);
int z2 = (z1 < gridPoint[2] ? gridPoint[2] : _pmeGridDimensions[2]-1);
int2 particleGridIndices;
particleGridIndices[0] = x*_pmeGridDimensions[1]*_pmeGridDimensions[2]+y*_pmeGridDimensions[2]+z1;
particleGridIndices[1] = x*_pmeGridDimensions[1]*_pmeGridDimensions[2]+y*_pmeGridDimensions[2]+z2;
result += computeFixedMultipolesGridValue(particleGridIndices, ix, iy, gridPoint);
if (z1 > gridPoint[2]) {
// Clear the grid.
for (int gridIndex = 0; gridIndex < _totalGridSize; gridIndex++)
_pmeGrid[gridIndex] = t_complex(0, 0);
// Loop over atoms and spread them on the grid.
for (int atomIndex = 0; atomIndex < _numParticles; atomIndex++) {
RealOpenMM atomCharge = _transformed[atomIndex].charge;
RealVec atomDipole = RealVec(_transformed[atomIndex].dipole[0],
_transformed[atomIndex].dipole[1],
_transformed[atomIndex].dipole[2]);
particleGridIndices[0] = x*_pmeGridDimensions[1]*_pmeGridDimensions[2]+y*_pmeGridDimensions[2];
particleGridIndices[1] = x*_pmeGridDimensions[1]*_pmeGridDimensions[2]+y*_pmeGridDimensions[2]+gridPoint[2];
result += computeFixedMultipolesGridValue(particleGridIndices, ix, iy, gridPoint);
RealOpenMM atomQuadrupoleXX = _transformed[atomIndex].quadrupole[QXX];
RealOpenMM atomQuadrupoleXY = _transformed[atomIndex].quadrupole[QXY];
RealOpenMM atomQuadrupoleXZ = _transformed[atomIndex].quadrupole[QXZ];
RealOpenMM atomQuadrupoleYY = _transformed[atomIndex].quadrupole[QYY];
RealOpenMM atomQuadrupoleYZ = _transformed[atomIndex].quadrupole[QYZ];
RealOpenMM atomQuadrupoleZZ = _transformed[atomIndex].quadrupole[QZZ];
IntVec& gridPoint = _iGrid[atomIndex];
for (int ix = 0; ix < AMOEBA_PME_ORDER; ix++) {
int x = (gridPoint[0]+ix) % _pmeGridDimensions[0];
for (int iy = 0; iy < AMOEBA_PME_ORDER; iy++) {
int y = (gridPoint[1]+iy) % _pmeGridDimensions[1];
for (int iz = 0; iz < AMOEBA_PME_ORDER; iz++) {
int z = (gridPoint[2]+iz) % _pmeGridDimensions[2];
RealOpenMM4 t = _thetai[0][atomIndex*AMOEBA_PME_ORDER+ix];
RealOpenMM4 u = _thetai[1][atomIndex*AMOEBA_PME_ORDER+iy];
RealOpenMM4 v = _thetai[2][atomIndex*AMOEBA_PME_ORDER+iz];
RealOpenMM term0 = atomCharge*u[0]*v[0] + atomDipole[1]*u[1]*v[0] + atomDipole[2]*u[0]*v[1] + atomQuadrupoleYY*u[2]*v[0] + atomQuadrupoleZZ*u[0]*v[2] + atomQuadrupoleYZ*u[1]*v[1];
RealOpenMM term1 = atomDipole[0]*u[0]*v[0] + atomQuadrupoleXY*u[1]*v[0] + atomQuadrupoleXZ*u[0]*v[1];
RealOpenMM term2 = atomQuadrupoleXX * u[0] * v[0];
t_complex& gridValue = _pmeGrid[x*_pmeGridDimensions[1]*_pmeGridDimensions[2]+y*_pmeGridDimensions[2]+z];
gridValue.re += term0*t[0] + term1*t[1] + term2*t[2];
}
}
}
_pmeGrid[gridIndex].re = result;
}
return;
}
void AmoebaReferencePmeMultipoleForce::performAmoebaReciprocalConvolution()
......@@ -5381,92 +5231,53 @@ void AmoebaReferencePmeMultipoleForce::computeFixedPotentialFromGrid()
}
}
t_complex AmoebaReferencePmeMultipoleForce::computeInducedDipoleGridValue(const int2& particleGridIndices, const RealVec* cartToFrac, int ix, int iy,
const IntVec& gridPoint,
const vector<RealVec>& inputInducedDipole,
const vector<RealVec>& inputInducedDipolePolar) const
{
void AmoebaReferencePmeMultipoleForce::spreadInducedDipolesOnGrid(const vector<RealVec>& inputInducedDipole,
const vector<RealVec>& inputInducedDipolePolar) {
// Create the matrix to convert from Cartesian to fractional coordinates.
// loop over particles contributing to this grid point
RealVec cartToFrac[3];
for (int i = 0; i < 3; i++)
for (int j = 0; j < 3; j++)
cartToFrac[j][i] = _pmeGridDimensions[j]*_recipBoxVectors[i][j];
t_complex gridValue;
gridValue.re = gridValue.im = 0.0;
// Clear the grid.
for (int i = _pmeAtomRange[particleGridIndices[0]]; i < _pmeAtomRange[particleGridIndices[1]+1]; ++i) {
int2 atomData = _pmeAtomGridIndex[i];
int atomIndex = atomData[0];
int z = atomData[1];
int iz = gridPoint[2]-z+(gridPoint[2] >= z ? 0 : _pmeGridDimensions[2]);
if (iz >= _pmeGridDimensions[2]) {
iz -= _pmeGridDimensions[2];
}
for (int gridIndex = 0; gridIndex < _totalGridSize; gridIndex++)
_pmeGrid[gridIndex] = t_complex(0, 0);
// Loop over atoms and spread them on the grid.
for (int atomIndex = 0; atomIndex < _numParticles; atomIndex++) {
RealVec inducedDipole = RealVec(inputInducedDipole[atomIndex][0]*cartToFrac[0][0] + inputInducedDipole[atomIndex][1]*cartToFrac[0][1] + inputInducedDipole[atomIndex][2]*cartToFrac[0][2],
inputInducedDipole[atomIndex][0]*cartToFrac[1][0] + inputInducedDipole[atomIndex][1]*cartToFrac[1][1] + inputInducedDipole[atomIndex][2]*cartToFrac[1][2],
inputInducedDipole[atomIndex][0]*cartToFrac[2][0] + inputInducedDipole[atomIndex][1]*cartToFrac[2][1] + inputInducedDipole[atomIndex][2]*cartToFrac[2][2]);
RealVec inducedDipolePolar = RealVec(inputInducedDipolePolar[atomIndex][0]*cartToFrac[0][0] + inputInducedDipolePolar[atomIndex][1]*cartToFrac[0][1] + inputInducedDipolePolar[atomIndex][2]*cartToFrac[0][2],
inputInducedDipolePolar[atomIndex][0]*cartToFrac[1][0] + inputInducedDipolePolar[atomIndex][1]*cartToFrac[1][1] + inputInducedDipolePolar[atomIndex][2]*cartToFrac[1][2],
inputInducedDipolePolar[atomIndex][0]*cartToFrac[2][0] + inputInducedDipolePolar[atomIndex][1]*cartToFrac[2][1] + inputInducedDipolePolar[atomIndex][2]*cartToFrac[2][2]);
RealOpenMM4 t = _thetai[0][atomIndex*AMOEBA_PME_ORDER+ix];
RealOpenMM4 u = _thetai[1][atomIndex*AMOEBA_PME_ORDER+iy];
RealOpenMM4 v = _thetai[2][atomIndex*AMOEBA_PME_ORDER+iz];
RealOpenMM term01 = inducedDipole[1]*u[1]*v[0] + inducedDipole[2]*u[0]*v[1];
RealOpenMM term11 = inducedDipole[0]*u[0]*v[0];
RealOpenMM term02 = inducedDipolePolar[1]*u[1]*v[0] + inducedDipolePolar[2]*u[0]*v[1];
RealOpenMM term12 = inducedDipolePolar[0]*u[0]*v[0];
gridValue.re += term01*t[0] + term11*t[1];
gridValue.im += term02*t[0] + term12*t[1];
}
return gridValue;
}
void AmoebaReferencePmeMultipoleForce::spreadInducedDipolesOnGrid(const vector<RealVec>& inputInducedDipole,
const vector<RealVec>& inputInducedDipolePolar)
{
RealVec cartToFrac[3];
for (int i = 0; i < 3; i++)
for (int j = 0; j < 3; j++)
cartToFrac[j][i] = _pmeGridDimensions[j]*_recipBoxVectors[i][j];
for (int gridIndex = 0; gridIndex < _totalGridSize; gridIndex++)
{
IntVec gridPoint;
getGridPointGivenGridIndex(gridIndex, gridPoint);
t_complex gridValue;
gridValue.re = gridValue.im = 0.0;
for (int ix = 0; ix < AMOEBA_PME_ORDER; ++ix)
{
int x = gridPoint[0]-ix+(gridPoint[0] >= ix ? 0 : _pmeGridDimensions[0]);
for (int iy = 0; iy < AMOEBA_PME_ORDER; ++iy)
{
int y = gridPoint[1]-iy+(gridPoint[1] >= iy ? 0 : _pmeGridDimensions[1]);
int z1 = gridPoint[2]-AMOEBA_PME_ORDER+1;
z1 += (z1 >= 0 ? 0 : _pmeGridDimensions[2]);
int z2 = (z1 < gridPoint[2] ? gridPoint[2] : _pmeGridDimensions[2]-1);
int2 particleGridIndices;
particleGridIndices[0] = x*_pmeGridDimensions[1]*_pmeGridDimensions[2]+y*_pmeGridDimensions[2]+z1;
particleGridIndices[1] = x*_pmeGridDimensions[1]*_pmeGridDimensions[2]+y*_pmeGridDimensions[2]+z2;
gridValue += computeInducedDipoleGridValue(particleGridIndices, cartToFrac, ix, iy, gridPoint, inputInducedDipole, inputInducedDipolePolar);
if (z1 > gridPoint[2])
{
particleGridIndices[0] = x*_pmeGridDimensions[1]*_pmeGridDimensions[2]+y*_pmeGridDimensions[2];
particleGridIndices[1] = x*_pmeGridDimensions[1]*_pmeGridDimensions[2]+y*_pmeGridDimensions[2]+gridPoint[2];
gridValue += computeInducedDipoleGridValue(particleGridIndices, cartToFrac, ix, iy, gridPoint, inputInducedDipole, inputInducedDipolePolar);
IntVec& gridPoint = _iGrid[atomIndex];
for (int ix = 0; ix < AMOEBA_PME_ORDER; ix++) {
int x = (gridPoint[0]+ix) % _pmeGridDimensions[0];
for (int iy = 0; iy < AMOEBA_PME_ORDER; iy++) {
int y = (gridPoint[1]+iy) % _pmeGridDimensions[1];
for (int iz = 0; iz < AMOEBA_PME_ORDER; iz++) {
int z = (gridPoint[2]+iz) % _pmeGridDimensions[2];
RealOpenMM4 t = _thetai[0][atomIndex*AMOEBA_PME_ORDER+ix];
RealOpenMM4 u = _thetai[1][atomIndex*AMOEBA_PME_ORDER+iy];
RealOpenMM4 v = _thetai[2][atomIndex*AMOEBA_PME_ORDER+iz];
RealOpenMM term01 = inducedDipole[1]*u[1]*v[0] + inducedDipole[2]*u[0]*v[1];
RealOpenMM term11 = inducedDipole[0]*u[0]*v[0];
RealOpenMM term02 = inducedDipolePolar[1]*u[1]*v[0] + inducedDipolePolar[2]*u[0]*v[1];
RealOpenMM term12 = inducedDipolePolar[0]*u[0]*v[0];
t_complex& gridValue = _pmeGrid[x*_pmeGridDimensions[1]*_pmeGridDimensions[2]+y*_pmeGridDimensions[2]+z];
gridValue.re += term01*t[0] + term11*t[1];
gridValue.im += term02*t[0] + term12*t[1];
}
}
}
_pmeGrid[gridIndex] = gridValue;
}
return;
}
void AmoebaReferencePmeMultipoleForce::computeInducedPotentialFromGrid()
......@@ -5669,7 +5480,6 @@ void AmoebaReferencePmeMultipoleForce::computeInducedPotentialFromGrid()
_phidp[20*m+18] = tuv012;
_phidp[20*m+19] = tuv111;
}
return;
}
RealOpenMM AmoebaReferencePmeMultipoleForce::computeReciprocalSpaceFixedMultipoleForceAndEnergy(const vector<MultipoleParticleData>& particleData,
......@@ -5874,7 +5684,6 @@ void AmoebaReferencePmeMultipoleForce::recordFixedMultipoleField()
_fixedMultipoleField[i][1] = -(_phi[20*i+1]*fracToCart[1][0] + _phi[20*i+2]*fracToCart[1][1] + _phi[20*i+3]*fracToCart[1][2]);
_fixedMultipoleField[i][2] = -(_phi[20*i+1]*fracToCart[2][0] + _phi[20*i+2]*fracToCart[2][1] + _phi[20*i+3]*fracToCart[2][2]);
}
return;
}
void AmoebaReferencePmeMultipoleForce::initializeInducedDipoles(vector<UpdateInducedDipoleFieldStruct>& updateInducedDipoleFields)
......@@ -5882,7 +5691,6 @@ void AmoebaReferencePmeMultipoleForce::initializeInducedDipoles(vector<UpdateInd
this->AmoebaReferenceMultipoleForce::initializeInducedDipoles(updateInducedDipoleFields);
calculateReciprocalSpaceInducedDipoleField(updateInducedDipoleFields);
return;
}
void AmoebaReferencePmeMultipoleForce::recordInducedDipoleField(vector<RealVec>& field, vector<RealVec>& fieldPolar)
......@@ -5901,7 +5709,6 @@ void AmoebaReferencePmeMultipoleForce::recordInducedDipoleField(vector<RealVec>&
fieldPolar[i][1] -= _phip[10*i+1]*fracToCart[1][0] + _phip[10*i+2]*fracToCart[1][1] + _phip[10*i+3]*fracToCart[1][2];
fieldPolar[i][2] -= _phip[10*i+1]*fracToCart[2][0] + _phip[10*i+2]*fracToCart[2][1] + _phip[10*i+3]*fracToCart[2][2];
}
return;
}
void AmoebaReferencePmeMultipoleForce::calculateReciprocalSpaceInducedDipoleField(vector<UpdateInducedDipoleFieldStruct>& updateInducedDipoleFields)
......@@ -5948,8 +5755,6 @@ void AmoebaReferencePmeMultipoleForce::calculateInducedDipoleFields(const vector
field[jj] += inducedDipoles[jj]*term;
}
}
return;
}
void AmoebaReferencePmeMultipoleForce::calculateDirectInducedDipolePairIxn(unsigned int iIndex, unsigned int jIndex,
......@@ -5968,8 +5773,6 @@ void AmoebaReferencePmeMultipoleForce::calculateDirectInducedDipolePairIxn(unsig
dur = inducedDipole[iIndex].dot(delta);
field[jIndex] += delta*(dur*preFactor2) + inducedDipole[iIndex]*preFactor1;
return;
}
void AmoebaReferencePmeMultipoleForce::calculateDirectInducedDipolePairIxns(const MultipoleParticleData& particleI,
......@@ -5987,7 +5790,8 @@ void AmoebaReferencePmeMultipoleForce::calculateDirectInducedDipolePairIxns(cons
getPeriodicDelta(deltaR);
RealOpenMM r2 = deltaR.dot(deltaR);
if (r2 > _cutoffDistanceSquared)return;
if (r2 > _cutoffDistanceSquared)
return;
RealOpenMM r = SQRT(r2);
......@@ -6039,13 +5843,10 @@ void AmoebaReferencePmeMultipoleForce::calculateDirectInducedDipolePairIxns(cons
*updateInducedDipoleFields[ii].inducedDipoles,
updateInducedDipoleFields[ii].inducedDipoleField);
}
return;
}
RealOpenMM AmoebaReferencePmeMultipoleForce::calculatePmeSelfEnergy(const vector<MultipoleParticleData>& particleData) const
{
RealOpenMM cii = 0.0;
RealOpenMM dii = 0.0;
RealOpenMM qii = 0.0;
......@@ -6074,7 +5875,6 @@ RealOpenMM AmoebaReferencePmeMultipoleForce::calculatePmeSelfEnergy(const vector
void AmoebaReferencePmeMultipoleForce::calculatePmeSelfTorque(const vector<MultipoleParticleData>& particleData,
vector<RealVec>& torques) const
{
RealOpenMM term = (2.0/3.0)*(_electric/_dielectric)*(_alphaEwald*_alphaEwald*_alphaEwald)/SQRT_PI;
for (unsigned int ii = 0; ii < _numParticles; ii++) {
......@@ -6085,7 +5885,6 @@ void AmoebaReferencePmeMultipoleForce::calculatePmeSelfTorque(const vector<Multi
torque *= term;
torques[ii] += torque;
}
return;
}
RealOpenMM AmoebaReferencePmeMultipoleForce::calculatePmeDirectElectrostaticPairIxn(const MultipoleParticleData& particleI,
......
plugins/amoeba/platforms/reference/src/SimTKReference/AmoebaReferenceMultipoleForce.h
View file @ 84c9bcdb
......@@ -1361,8 +1361,6 @@ private:
std::vector<RealOpenMM> _phid;
std::vector<RealOpenMM> _phip;
std::vector<RealOpenMM> _phidp;
std::vector<int> _pmeAtomRange;
std::vector<int2> _pmeAtomGridIndex;
std::vector<RealOpenMM4> _pmeBsplineTheta;
std::vector<RealOpenMM4> _pmeBsplineDtheta;
......@@ -1439,31 +1437,6 @@ private:
*/
void computeAmoebaBsplines(const std::vector<MultipoleParticleData>& particleData);
/**
* For each grid point, find the range of sorted atoms associated with that point.
*
* @param particleData vector of particle positions and parameters (charge, labFrame dipoles, quadrupoles, ...)
*/
void findAmoebaAtomRangeForGrid(const vector<MultipoleParticleData>& particleData);
/**
* Get grid point given grid index.
*
* @param gridIndex input grid index
* @param gridPoint output grid point
*/
void getGridPointGivenGridIndex(int gridIndex, IntVec& gridPoint) const;
/**
* Compute induced dipole grid value.
*
* @param particleGridIndices particle grid indices
* @param ix x-dimension offset value
* @param iy y-dimension offset value
* @param gridPoint grid point for which value is to be computed
*/
RealOpenMM computeFixedMultipolesGridValue(const int2& particleGridIndices, int ix, int iy, const IntVec& gridPoint) const;
/**
* Transform multipoles from cartesian coordinates to fractional coordinates.
*/
......@@ -1559,21 +1532,6 @@ private:
*/
void initializeInducedDipoles(std::vector<UpdateInducedDipoleFieldStruct>& updateInducedDipoleFields);
/**
* Compute induced dipole grid value.
*
* @param atomIndices indices of first and last atom contiputing to grid point value
* @param cartToFrac transformation matrix from Cartesian to fractional coordinates
* @param ix x-dimension offset value
* @param iy y-dimension offset value
* @param gridPoint grid point for which value is to be computed
* @param inputInducedDipole induced dipole value
* @param inputInducedDipolePolar induced dipole polar value
*/
t_complex computeInducedDipoleGridValue(const int2& atomIndices, const RealVec* cartToFrac, int ix, int iy, const IntVec& gridPoint,
const std::vector<RealVec>& inputInducedDipole,
const std::vector<RealVec>& inputInducedDipolePolar) const;
/**
* Spread induced dipoles onto grid.
*
......
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