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// Thermodynamic integration is not multiprocessor friendly right now |
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#include <iostream> |
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#include <stdlib.h> |
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#include <cstdio> |
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#include <fstream> |
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#include <iomanip> |
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#include <string> |
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#include <cstring> |
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#include <math.h> |
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using namespace std; |
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#include "restraints/Restraints.hpp" |
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#include "brains/SimInfo.hpp" |
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#include "utils/simError.h" |
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#define PI 3.14159265359 |
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#define TWO_PI 6.28318530718 |
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Restraints::Restraints(double lambdaVal, double lambdaExp){ |
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|
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lambdaValue = lambdaVal; |
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lambdaK = lambdaExp; |
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|
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std::vector<double> resConsts; |
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|
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const char *jolt = " \t\n;,"; |
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|
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#ifdef IS_MPI |
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|
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if(worldRank == 0 ){ |
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#endif // is_mpi |
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|
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strcpy(springName, "HarmSpringConsts.txt"); |
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ifstream springs(springName); |
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|
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|
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if (!springs) { |
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sprintf(painCave.errMsg, |
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"Unable to open HarmSpringConsts.txt for reading, so the\n" |
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|
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"\tdefault spring constants will be loaded. If you want\n" |
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|
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"\tto specify spring constants, include a three line\n" |
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|
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"\tHarmSpringConsts.txt file in the execution directory.\n"); |
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painCave.severity = OOPSE_WARNING; |
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painCave.isFatal = 0; |
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simError(); |
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|
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// load default spring constants |
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kDist = 6; // spring constant in units of kcal/(mol*ang^2) |
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kTheta = 7.5; // in units of kcal/mol |
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kOmega = 13.5; // in units of kcal/mol |
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} else { |
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springs.getline(inLine,999,'\n'); |
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// the file is blank! |
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if (springs.eof()){ |
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sprintf(painCave.errMsg, |
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|
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"HarmSpringConsts.txt file is not valid.\n" |
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"\tThe file should contain four rows, the last three containing\n" |
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"\ta label and the spring constant value. They should be listed\n" |
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"\tin the following order: kDist (positional restrant), kTheta\n" |
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"\t(rot. restraint: deflection of z-axis), and kOmega (rot.\n" |
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"\trestraint: rotation about the z-axis).\n"); |
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painCave.severity = OOPSE_ERROR; |
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painCave.isFatal = 1; |
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simError(); |
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} |
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// read in spring constants and check to make sure it is a valid file |
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springs.getline(inLine,999,'\n'); |
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while (!springs.eof()){ |
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if (NULL != inLine){ |
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token = strtok(inLine,jolt); |
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token = strtok(NULL,jolt); |
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if (NULL != token){ |
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strcpy(inValue,token); |
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resConsts.push_back(atof(inValue)); |
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} |
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} |
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springs.getline(inLine,999,'\n'); |
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} |
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if (resConsts.size() == 3){ |
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kDist = resConsts[0]; |
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kTheta = resConsts[1]; |
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kOmega = resConsts[2]; |
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} |
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else { |
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sprintf(painCave.errMsg, |
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"HarmSpringConsts.txt file is not valid.\n" |
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"\tThe file should contain four rows, the last three containing\n" |
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"\ta label and the spring constant value. They should be listed\n" |
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"\tin the following order: kDist (positional restrant), kTheta\n" |
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"\t(rot. restraint: deflection of z-axis), and kOmega (rot.\n" |
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"\trestraint: rotation about the z-axis).\n"); |
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painCave.severity = OOPSE_ERROR; |
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painCave.isFatal = 1; |
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simError(); |
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} |
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} |
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#ifdef IS_MPI |
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} |
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MPI_Bcast(&kDist, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD); |
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MPI_Bcast(&kTheta, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD); |
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MPI_Bcast(&kOmega, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD); |
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sprintf( checkPointMsg, |
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"Sucessfully opened and read spring file.\n"); |
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MPIcheckPoint(); |
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#endif // is_mpi |
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sprintf(painCave.errMsg, |
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"The spring constants for thermodynamic integration are:\n" |
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"\tkDist = %lf\n" |
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"\tkTheta = %lf\n" |
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"\tkOmega = %lf\n", kDist, kTheta, kOmega); |
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painCave.severity = OOPSE_INFO; |
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painCave.isFatal = 0; |
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simError(); |
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} |
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Restraints::~Restraints(){ |
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} |
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void Restraints::Calc_rVal(double position[3], int currentMol){ |
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delRx = position[0] - cofmPosX[currentMol]; |
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delRy = position[1] - cofmPosY[currentMol]; |
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delRz = position[2] - cofmPosZ[currentMol]; |
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return; |
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} |
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void Restraints::Calc_body_thetaVal(double matrix[3][3], int currentMol){ |
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ub0x = matrix[0][0]*uX0[currentMol] + matrix[0][1]*uY0[currentMol] |
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+ matrix[0][2]*uZ0[currentMol]; |
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ub0y = matrix[1][0]*uX0[currentMol] + matrix[1][1]*uY0[currentMol] |
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+ matrix[1][2]*uZ0[currentMol]; |
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ub0z = matrix[2][0]*uX0[currentMol] + matrix[2][1]*uY0[currentMol] |
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+ matrix[2][2]*uZ0[currentMol]; |
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normalize = sqrt(ub0x*ub0x + ub0y*ub0y + ub0z*ub0z); |
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ub0x = ub0x/normalize; |
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ub0y = ub0y/normalize; |
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ub0z = ub0z/normalize; |
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// Theta is the dot product of the reference and new z-axes |
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theta = acos(ub0z); |
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return; |
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} |
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void Restraints::Calc_body_omegaVal(double matrix[3][3], double zAngle){ |
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double zRotator[3][3]; |
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double tempOmega; |
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double wholeTwoPis; |
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// Use the omega accumulated from the rotation propagation |
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omega = zAngle; |
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// translate the omega into a range between -PI and PI |
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if (omega < -PI){ |
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tempOmega = omega / -TWO_PI; |
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wholeTwoPis = floor(tempOmega); |
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tempOmega = omega + TWO_PI*wholeTwoPis; |
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if (tempOmega < -PI) |
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omega = tempOmega + TWO_PI; |
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else |
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omega = tempOmega; |
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} |
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if (omega > PI){ |
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tempOmega = omega / TWO_PI; |
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wholeTwoPis = floor(tempOmega); |
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tempOmega = omega - TWO_PI*wholeTwoPis; |
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if (tempOmega > PI) |
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omega = tempOmega - TWO_PI; |
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else |
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omega = tempOmega; |
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} |
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vb0x = sin(omega); |
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vb0y = cos(omega); |
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vb0z = 0.0; |
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normalize = sqrt(vb0x*vb0x + vb0y*vb0y + vb0z*vb0z); |
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vb0x = vb0x/normalize; |
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vb0y = vb0y/normalize; |
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vb0z = vb0z/normalize; |
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return; |
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} |
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|
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|
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double Restraints::Calc_Restraint_Forces(vector<StuntDouble*> vecParticles){ |
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|
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double pos[3]; |
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|
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double A[3][3]; |
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double tolerance; |
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|
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double tempPotent; |
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|
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double factor; |
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double spaceTrq[3]; |
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double omegaPass; |
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|
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|
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tolerance = 5.72957795131e-7; |
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|
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harmPotent = 0.0; // zero out the global harmonic potential variable |
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|
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|
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factor = 1 - pow(lambdaValue, lambdaK); |
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for (i=0; i<vecParticles.size(); i++){ |
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if (vecParticles[i]->isDirectional()){ |
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pos = vecParticles[i]->getPos(); |
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vecParticles[i]->getA(A); |
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Calc_rVal( pos, i ); |
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Calc_body_thetaVal( A, i ); |
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omegaPass = vecParticles[i]->getZangle(); |
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Calc_body_omegaVal( A, omegaPass ); |
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|
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|
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// first we calculate the derivatives |
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dVdrx = -kDist*delRx; |
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dVdry = -kDist*delRy; |
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dVdrz = -kDist*delRz; |
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|
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|
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// uTx... and vTx... are the body-fixed z and y unit vectors |
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uTx = 0.0; |
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uTy = 0.0; |
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|
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uTz = 1.0; |
440 |
|
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vTx = 0.0; |
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|
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vTy = 1.0; |
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|
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vTz = 0.0; |
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|
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dVdux = 0; |
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dVduy = 0; |
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dVduz = 0; |
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dVdvx = 0; |
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dVdvy = 0; |
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dVdvz = 0; |
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|
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|
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if (fabs(theta) > tolerance) { |
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|
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dVdux = -(kTheta*theta/sin(theta))*ub0x; |
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|
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dVduy = -(kTheta*theta/sin(theta))*ub0y; |
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dVduz = -(kTheta*theta/sin(theta))*ub0z; |
470 |
|
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} |
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|
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|
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|
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if (fabs(omega) > tolerance) { |
476 |
|
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dVdvx = -(kOmega*omega/sin(omega))*vb0x; |
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|
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dVdvy = -(kOmega*omega/sin(omega))*vb0y; |
480 |
|
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dVdvz = -(kOmega*omega/sin(omega))*vb0z; |
482 |
|
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} |
484 |
|
485 |
|
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|
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// next we calculate the restraint forces and torques |
488 |
|
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restraintFrc[0] = dVdrx; |
490 |
|
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restraintFrc[1] = dVdry; |
492 |
|
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restraintFrc[2] = dVdrz; |
494 |
|
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tempPotent = 0.5*kDist*(delRx*delRx + delRy*delRy + delRz*delRz); |
496 |
|
497 |
|
498 |
|
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restraintTrq[0] = 0.0; |
500 |
|
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restraintTrq[1] = 0.0; |
502 |
|
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restraintTrq[2] = 0.0; |
504 |
|
505 |
|
506 |
|
507 |
if (fabs(omega) > tolerance) { |
508 |
|
509 |
restraintTrq[0] += 0.0; |
510 |
|
511 |
restraintTrq[1] += 0.0; |
512 |
|
513 |
restraintTrq[2] += vTy*dVdvx; |
514 |
|
515 |
tempPotent += 0.5*(kOmega*omega*omega); |
516 |
|
517 |
} |
518 |
|
519 |
if (fabs(theta) > tolerance) { |
520 |
|
521 |
restraintTrq[0] += (uTz*dVduy); |
522 |
|
523 |
restraintTrq[1] += -(uTz*dVdux); |
524 |
|
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restraintTrq[2] += 0.0; |
526 |
|
527 |
tempPotent += 0.5*(kTheta*theta*theta); |
528 |
|
529 |
} |
530 |
|
531 |
|
532 |
|
533 |
for (j = 0; j < 3; j++) { |
534 |
|
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restraintFrc[j] *= factor; |
536 |
|
537 |
restraintTrq[j] *= factor; |
538 |
|
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} |
540 |
|
541 |
|
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|
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harmPotent += tempPotent; |
544 |
|
545 |
|
546 |
|
547 |
// now we need to convert from body-fixed torques to space-fixed torques |
548 |
|
549 |
spaceTrq[0] = A[0][0]*restraintTrq[0] + A[1][0]*restraintTrq[1] |
550 |
|
551 |
+ A[2][0]*restraintTrq[2]; |
552 |
|
553 |
spaceTrq[1] = A[0][1]*restraintTrq[0] + A[1][1]*restraintTrq[1] |
554 |
|
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+ A[2][1]*restraintTrq[2]; |
556 |
|
557 |
spaceTrq[2] = A[0][2]*restraintTrq[0] + A[1][2]*restraintTrq[1] |
558 |
|
559 |
+ A[2][2]*restraintTrq[2]; |
560 |
|
561 |
|
562 |
|
563 |
// now it's time to pass these temporary forces and torques |
564 |
|
565 |
// to the total forces and torques |
566 |
|
567 |
vecParticles[i]->addFrc(restraintFrc); |
568 |
|
569 |
vecParticles[i]->addTrq(spaceTrq); |
570 |
|
571 |
} |
572 |
|
573 |
} |
574 |
|
575 |
|
576 |
|
577 |
// and we can return the appropriately scaled potential energy |
578 |
|
579 |
tempPotent = harmPotent * factor; |
580 |
|
581 |
return tempPotent; |
582 |
|
583 |
} |
584 |
|
585 |
|
586 |
|
587 |
void Restraints::Store_Init_Info(vector<StuntDouble*> vecParticles){ |
588 |
|
589 |
int idealSize; |
590 |
|
591 |
double pos[3]; |
592 |
|
593 |
double A[3][3]; |
594 |
|
595 |
double RfromQ[3][3]; |
596 |
|
597 |
double quat0, quat1, quat2, quat3; |
598 |
|
599 |
double dot; |
600 |
|
601 |
std::vector<double> tempZangs; |
602 |
|
603 |
const char *delimit = " \t\n;,"; |
604 |
|
605 |
|
606 |
|
607 |
//open the idealCrystal.in file and zAngle.ang file |
608 |
|
609 |
strcpy(fileName, "idealCrystal.in"); |
610 |
|
611 |
strcpy(angleName, "zAngle.ang"); |
612 |
|
613 |
|
614 |
|
615 |
ifstream crystalIn(fileName); |
616 |
|
617 |
ifstream angleIn(angleName); |
618 |
|
619 |
|
620 |
|
621 |
// check to see if these files are present in the execution directory |
622 |
|
623 |
if (!crystalIn) { |
624 |
|
625 |
sprintf(painCave.errMsg, |
626 |
|
627 |
"Restraints Error: Unable to open idealCrystal.in for reading.\n" |
628 |
|
629 |
"\tMake sure a ref. crystal file is in the working directory.\n"); |
630 |
|
631 |
painCave.severity = OOPSE_ERROR; |
632 |
|
633 |
painCave.isFatal = 1; |
634 |
|
635 |
simError(); |
636 |
|
637 |
} |
638 |
|
639 |
|
640 |
|
641 |
// it's not fatal to lack a zAngle.ang file, it just means you're starting |
642 |
|
643 |
// from the ideal crystal state |
644 |
|
645 |
if (!angleIn) { |
646 |
|
647 |
sprintf(painCave.errMsg, |
648 |
|
649 |
"Restraints Warning: The lack of a zAngle.ang file is mildly\n" |
650 |
|
651 |
"\tunsettling... This means the simulation is starting from the\n" |
652 |
|
653 |
"\tidealCrystal.in reference configuration, so the omega values\n" |
654 |
|
655 |
"\twill all be set to zero. If this is not the case, the energy\n" |
656 |
|
657 |
"\tcalculations will be wrong.\n"); |
658 |
|
659 |
painCave.severity = OOPSE_WARNING; |
660 |
|
661 |
painCave.isFatal = 0; |
662 |
|
663 |
simError(); |
664 |
|
665 |
} |
666 |
|
667 |
|
668 |
|
669 |
// A rather specific reader for OOPSE .eor files... |
670 |
|
671 |
// Let's read in the perfect crystal file |
672 |
|
673 |
crystalIn.getline(inLine,999,'\n'); |
674 |
|
675 |
// check to see if the crystal file is the same length as starting config. |
676 |
|
677 |
token = strtok(inLine,delimit); |
678 |
|
679 |
strcpy(inValue,token); |
680 |
|
681 |
idealSize = atoi(inValue); |
682 |
|
683 |
if (idealSize != vecParticles.size()) { |
684 |
|
685 |
sprintf(painCave.errMsg, |
686 |
|
687 |
"Restraints Error: Reference crystal file is not valid.\n" |
688 |
|
689 |
"\tMake sure the idealCrystal.in file is the same size as the\n" |
690 |
|
691 |
"\tstarting configuration. Using an incompatable crystal will\n" |
692 |
|
693 |
"\tlead to energy calculation failures.\n"); |
694 |
|
695 |
painCave.severity = OOPSE_ERROR; |
696 |
|
697 |
painCave.isFatal = 1; |
698 |
|
699 |
simError(); |
700 |
|
701 |
} |
702 |
|
703 |
// else, the file is okay... let's continue |
704 |
|
705 |
crystalIn.getline(inLine,999,'\n'); |
706 |
|
707 |
|
708 |
|
709 |
for (i=0; i<vecParticles.size(); i++) { |
710 |
|
711 |
crystalIn.getline(inLine,999,'\n'); |
712 |
|
713 |
token = strtok(inLine,delimit); |
714 |
|
715 |
token = strtok(NULL,delimit); |
716 |
|
717 |
strcpy(inValue,token); |
718 |
|
719 |
cofmPosX.push_back(atof(inValue)); |
720 |
|
721 |
token = strtok(NULL,delimit); |
722 |
|
723 |
strcpy(inValue,token); |
724 |
|
725 |
cofmPosY.push_back(atof(inValue)); |
726 |
|
727 |
token = strtok(NULL,delimit); |
728 |
|
729 |
strcpy(inValue,token); |
730 |
|
731 |
cofmPosZ.push_back(atof(inValue)); |
732 |
|
733 |
token = strtok(NULL,delimit); |
734 |
|
735 |
token = strtok(NULL,delimit); |
736 |
|
737 |
token = strtok(NULL,delimit); |
738 |
|
739 |
token = strtok(NULL,delimit); |
740 |
|
741 |
strcpy(inValue,token); |
742 |
|
743 |
quat0 = atof(inValue); |
744 |
|
745 |
token = strtok(NULL,delimit); |
746 |
|
747 |
strcpy(inValue,token); |
748 |
|
749 |
quat1 = atof(inValue); |
750 |
|
751 |
token = strtok(NULL,delimit); |
752 |
|
753 |
strcpy(inValue,token); |
754 |
|
755 |
quat2 = atof(inValue); |
756 |
|
757 |
token = strtok(NULL,delimit); |
758 |
|
759 |
strcpy(inValue,token); |
760 |
|
761 |
quat3 = atof(inValue); |
762 |
|
763 |
|
764 |
|
765 |
// now build the rotation matrix and find the unit vectors |
766 |
|
767 |
RfromQ[0][0] = quat0*quat0 + quat1*quat1 - quat2*quat2 - quat3*quat3; |
768 |
|
769 |
RfromQ[0][1] = 2*(quat1*quat2 + quat0*quat3); |
770 |
|
771 |
RfromQ[0][2] = 2*(quat1*quat3 - quat0*quat2); |
772 |
|
773 |
RfromQ[1][0] = 2*(quat1*quat2 - quat0*quat3); |
774 |
|
775 |
RfromQ[1][1] = quat0*quat0 - quat1*quat1 + quat2*quat2 - quat3*quat3; |
776 |
|
777 |
RfromQ[1][2] = 2*(quat2*quat3 + quat0*quat1); |
778 |
|
779 |
RfromQ[2][0] = 2*(quat1*quat3 + quat0*quat2); |
780 |
|
781 |
RfromQ[2][1] = 2*(quat2*quat3 - quat0*quat1); |
782 |
|
783 |
RfromQ[2][2] = quat0*quat0 - quat1*quat1 - quat2*quat2 + quat3*quat3; |
784 |
|
785 |
|
786 |
|
787 |
normalize = sqrt(RfromQ[2][0]*RfromQ[2][0] + RfromQ[2][1]*RfromQ[2][1] |
788 |
|
789 |
+ RfromQ[2][2]*RfromQ[2][2]); |
790 |
|
791 |
uX0.push_back(RfromQ[2][0]/normalize); |
792 |
|
793 |
uY0.push_back(RfromQ[2][1]/normalize); |
794 |
|
795 |
uZ0.push_back(RfromQ[2][2]/normalize); |
796 |
|
797 |
|
798 |
|
799 |
normalize = sqrt(RfromQ[1][0]*RfromQ[1][0] + RfromQ[1][1]*RfromQ[1][1] |
800 |
|
801 |
+ RfromQ[1][2]*RfromQ[1][2]); |
802 |
|
803 |
vX0.push_back(RfromQ[1][0]/normalize); |
804 |
|
805 |
vY0.push_back(RfromQ[1][1]/normalize); |
806 |
|
807 |
vZ0.push_back(RfromQ[1][2]/normalize); |
808 |
|
809 |
} |
810 |
|
811 |
crystalIn.close(); |
812 |
|
813 |
|
814 |
|
815 |
// now we read in the zAngle.ang file |
816 |
|
817 |
if (angleIn){ |
818 |
|
819 |
angleIn.getline(inLine,999,'\n'); |
820 |
|
821 |
angleIn.getline(inLine,999,'\n'); |
822 |
|
823 |
while (!angleIn.eof()) { |
824 |
|
825 |
token = strtok(inLine,delimit); |
826 |
|
827 |
strcpy(inValue,token); |
828 |
|
829 |
tempZangs.push_back(atof(inValue)); |
830 |
|
831 |
angleIn.getline(inLine,999,'\n'); |
832 |
|
833 |
} |
834 |
|
835 |
|
836 |
|
837 |
// test to make sure the zAngle.ang file is the proper length |
838 |
|
839 |
if (tempZangs.size() == vecParticles.size()) |
840 |
|
841 |
for (i=0; i<vecParticles.size(); i++) |
842 |
|
843 |
vecParticles[i]->setZangle(tempZangs[i]); |
844 |
|
845 |
else { |
846 |
|
847 |
sprintf(painCave.errMsg, |
848 |
|
849 |
"Restraints Error: the supplied zAngle file is not valid.\n" |
850 |
|
851 |
"\tMake sure the zAngle.ang file matches with the initial\n" |
852 |
|
853 |
"\tconfiguration (i.e. they're the same length). Using the wrong\n" |
854 |
|
855 |
"\tzAngle file will lead to errors in the energy calculations.\n"); |
856 |
|
857 |
painCave.severity = OOPSE_ERROR; |
858 |
|
859 |
painCave.isFatal = 1; |
860 |
|
861 |
simError(); |
862 |
|
863 |
} |
864 |
|
865 |
} |
866 |
|
867 |
angleIn.close(); |
868 |
|
869 |
|
870 |
|
871 |
return; |
872 |
|
873 |
} |
874 |
|
875 |
|
876 |
|
877 |
void Restraints::Write_zAngle_File(vector<StuntDouble*> vecParticles){ |
878 |
|
879 |
|
880 |
|
881 |
char zOutName[200]; |
882 |
|
883 |
|
884 |
|
885 |
strcpy(zOutName,"zAngle.ang"); |
886 |
|
887 |
|
888 |
|
889 |
ofstream angleOut(zOutName); |
890 |
|
891 |
angleOut << "This file contains the omega values for the .eor file\n"; |
892 |
|
893 |
for (i=0; i<vecParticles.size(); i++) { |
894 |
|
895 |
angleOut << vecParticles[i]->getZangle() << "\n"; |
896 |
|
897 |
} |
898 |
|
899 |
return; |
900 |
|
901 |
} |
902 |
|
903 |
|
904 |
|
905 |
double Restraints::getVharm(){ |
906 |
|
907 |
return harmPotent; |
908 |
|
909 |
} |
910 |
|
911 |
|
912 |
|