mdtools/interface_implementation/TraPPE_ExFF.cpp

#include <cstdlib>
#include <cstdio>
#include <cstring>

#include <iostream>
using namespace std;

#include "ForceFields.hpp"
#include "SRI.hpp"


TraPPE_ExFF::TraPPE_ExFF(){

  char fileName[200];
  char* ffPath_env = "FORCE_PARAM_PATH";
  char* ffPath;
  char temp[200];

  // generate the force file name

  strcpy( fileName, "TraPPE_Ex.frc" ); 

  // attempt to open the file in the current directory first.
  
  frcFile = fopen( fileName, "r" );
  
  if( frcFile == NULL ){

    // next see if the force path enviorment variable is set
    
    ffPath = getenv( ffPath_env );
    strcpy( temp, ffPath );
    strcat( temp, "/" );
    strcat( temp, fileName );
    strcpy( fileName, temp );

    frcFile = fopen( fileName, "r" );
    
    if( frcFile == NULL ){
      
      fprintf( stderr,
               "Error opening the force field parameter file: %s\n"
               "Have you tried setting the FORCE_PARAM_PATH environment "
               "vairable?\n",
               fileName );
      exit( 8 );
    }
  }
}

TraPPE_ExFF::~TraPPE_ExFF(){
  
  fclose( frcFile );
}

void TraPPE_ExFF::initializeAtoms( void ){
  
  class LinkedType {
  public:
    LinkedType(){ 
      next = NULL;
      name[0] = '\0';
    }
    ~LinkedType(){ if( next != NULL ) delete next; }

    LinkedType* find(char* key){ 
      if( !strcmp(name, key) ) return this;
      if( next != NULL ) return next->find(key);
      return NULL;
    }
    
    char name[15];
    int isDipole;
    double mass;
    double epslon;
    double sigma;
    double dipole;
    LinkedType* next;
  };
  
  LinkedType* headAtomType; 
  LinkedType* currentAtomType;
  LinkedType* tempAtomType;

  char readLine[500];
  char* the_token;
  char* eof_test;
  int foundAtom = 0;
  int lineNum = 0;
  int i;
  
  //////////////////////////////////////////////////
  // a quick water fix 

  double waterI[3][3]; 
  waterI[0][0] = 1.76958347772500;
  waterI[0][1] = 0.0;
  waterI[0][2] = 0.0;

  waterI[1][0] = 0.0;
  waterI[1][1] = 0.614537057924513;
  waterI[1][2] = 0.0;

  waterI[2][0] = 0.0;
  waterI[2][1] = 0.0;
  waterI[2][2] = 1.15504641980049;


  double headI[3][3]; 
  headI[0][0] = 1125;
  headI[0][1] = 0.0;
  headI[0][2] = 0.0;

  headI[1][0] = 0.0;
  headI[1][1] = 1125;
  headI[1][2] = 0.0;

  headI[2][0] = 0.0;
  headI[2][1] = 0.0;
  headI[2][2] = 250;

  
  //////////////////////////////////////////////////

  Atom** the_atoms;
  int nAtoms;
  the_atoms = entry_plug->atoms;
  nAtoms = entry_plug->n_atoms;
  
  // read in the atom types.

  rewind( frcFile );
  headAtomType = new LinkedType;
  currentAtomType = headAtomType;
  
  eof_test = fgets( readLine, sizeof(readLine), frcFile );
  lineNum++;
  if( eof_test == NULL ){
    fprintf( stderr, "Error in reading Atoms from force file.\n" );
    exit(8);
  }

  
  while( !foundAtom ){
    while( eof_test != NULL && readLine[0] != '#' ){
      eof_test = fgets( readLine, sizeof(readLine), frcFile );
      lineNum++;
    }
    if( eof_test == NULL ){
      fprintf( stderr, 
               "Error in reading Atoms from force file at line %d.\n",
               lineNum );
      exit(8);
    }

    the_token = strtok( readLine, " ,;\t#\n" );
    foundAtom = !strcmp( "AtomTypes", the_token );
    
    if( !foundAtom ){
      eof_test = fgets( readLine, sizeof(readLine), frcFile );
      lineNum++;

      if( eof_test == NULL ){
        fprintf( stderr, 
                 "Error in reading Atoms from force file at line %d.\n",
                 lineNum );
        exit(8);
      } 
    }
  }

  // we are now at the AtomTypes section.

  eof_test = fgets( readLine, sizeof(readLine), frcFile );
  lineNum++;
  
  if( eof_test == NULL ){
    fprintf( stderr, 
             "Error in reading Atoms from force file at line %d.\n",
             lineNum );
    exit(8);
  }

  while( readLine[0] != '#' && eof_test != NULL ){
    
    if( readLine[0] != '!' ){
      
      the_token = strtok( readLine, " \n\t,;" );
      if( the_token != NULL ){
        
        strcpy( currentAtomType->name, the_token );

        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing AtomTypes: line %d\n", lineNum );
          exit(8);
        }

        sscanf( the_token, "%d", &currentAtomType->isDipole );

        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing AtomTypes: line %d\n", lineNum );
          exit(8);
        }

        sscanf( the_token, "%lf", &currentAtomType->mass );

        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing AtomTypes: line %d\n", lineNum );
          exit(8);
        }
        
        sscanf( the_token, "%lf", &currentAtomType->epslon );
        
        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing AtomTypes: line %d\n", lineNum );
          exit(8);
        }

        sscanf( the_token, "%lf", &currentAtomType->sigma );
        
        if( currentAtomType->isDipole ){
          if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
            fprintf( stderr, "Error parseing AtomTypes: line %d\n", lineNum );
            exit(8);
          }
          
          sscanf( the_token, "%lf", &currentAtomType->dipole );
        }
      }
    }
    
    tempAtomType = new LinkedType;
    currentAtomType->next = tempAtomType;
    currentAtomType = tempAtomType;
    
    eof_test = fgets( readLine, sizeof(readLine), frcFile );
    lineNum++;
  }

  
  // initialize the atoms
  
  DirectionalAtom* dAtom;

  for( i=0; i<nAtoms; i++ ){
    
    currentAtomType = headAtomType->find( the_atoms[i]->getType() );
    if( currentAtomType == NULL ){
      fprintf( stderr, "AtomType error, %s not found in force file.\n",
               the_atoms[i]->getType() );
      exit(8);
    }
    
    the_atoms[i]->setMass( currentAtomType->mass );
    the_atoms[i]->setEpslon( currentAtomType->epslon );
    the_atoms[i]->setSigma( currentAtomType->sigma );
    the_atoms[i]->setLJ();

    if( currentAtomType->isDipole ){
      if( the_atoms[i]->isDirectional() ){
        
        dAtom = (DirectionalAtom *) the_atoms[i];
        dAtom->setMu( currentAtomType->dipole );
        dAtom->setHasDipole( 1 );
        dAtom->setJx( 0.0 );
        dAtom->setJy( 0.0 );
        dAtom->setJz( 0.0 );
        
        if(!strcmp("SSD",the_atoms[i]->getType())){
          dAtom->setI( waterI );
          dAtom->setSSD( 1 );
        }
        else if(!strcmp("HEAD",the_atoms[i]->getType())){
          dAtom->setI( headI );
          dAtom->setSSD( 0 );
        }
        else{
          fprintf(stderr,
                  "AtmType error, %s does not have a moment of inertia set.\n",
                  the_atoms[i]->getType() );
          exit(8);
        }
        entry_plug->n_dipoles++;
      }
      else{
        std::cerr 
          << "TraPPE_ExFF error: Atom \"" 
          << currentAtomType->name << "\" is a dipole, yet no standard"
          << " orientation was specifed in the BASS file.\n";
        exit(8);
      }
    }
    else{
      if( the_atoms[i]->isDirectional() ){
        std::cerr
          << "TraPPE_ExFF error: Atom \""
          << currentAtomType->name << "\" was given a standard orientation"
          << " in the BASS file, yet it is not a dipole.\n";
        exit(8);
      }
    }
  }


  // clean up the memory
  
  delete headAtomType;
}

void TraPPE_ExFF::initializeBonds( bond_pair* the_bonds ){
  
  class LinkedType {
  public:
    LinkedType(){ 
      next = NULL;
      nameA[0] = '\0';
      nameB[0] = '\0';
      type[0] = '\0';
    }
    ~LinkedType(){ if( next != NULL ) delete next; }

    LinkedType* find(char* key1, char* key2){ 
      if( !strcmp(nameA, key1 ) && !strcmp( nameB, key2 ) ) return this;
      if( !strcmp(nameA, key2 ) && !strcmp( nameB, key1 ) ) return this;
      if( next != NULL ) return next->find(key1, key2);
      return NULL;
    }
    
    char nameA[15];
    char nameB[15];
    char type[30];
    double d0;

    LinkedType* next;
  };


  LinkedType* headBondType; 
  LinkedType* currentBondType;
  LinkedType* tempBondType;

  char readLine[500];
  char* the_token;
  char* eof_test;
  int foundBond = 0;
  int lineNum = 0;
  int i, a, b;
  char* atomA;
  char* atomB;

  SRI **the_sris;
  Atom** the_atoms;
  int nBonds;
  the_sris = entry_plug->sr_interactions;
  the_atoms = entry_plug->atoms;
  nBonds = entry_plug->n_bonds;

  // read in the bond types.

  rewind( frcFile );
  headBondType = new LinkedType;
  currentBondType = headBondType;
  
  eof_test = fgets( readLine, sizeof(readLine), frcFile );
  lineNum++;
  if( eof_test == NULL ){
    fprintf( stderr, "Error in reading Bonds from force file.\n" );
    exit(8);
  }

  
  while( !foundBond ){
    while( eof_test != NULL && readLine[0] != '#' ){
      eof_test = fgets( readLine, sizeof(readLine), frcFile );
      lineNum++;
    }
    if( eof_test == NULL ){
      fprintf( stderr, 
               "Error in reading Bonds from force file at line %d.\n",
               lineNum );
      exit(8);
    }

    the_token = strtok( readLine, " ,;\t#\n" );
    foundBond = !strcmp( "BondTypes", the_token );
    
    if( !foundBond ){
      eof_test = fgets( readLine, sizeof(readLine), frcFile );
      lineNum++;

      if( eof_test == NULL ){
        fprintf( stderr, 
                 "Error in reading Bonds from force file at line %d.\n",
                 lineNum );
        exit(8);
      } 
    }
  }

  // we are now at the BondTypes section.

  eof_test = fgets( readLine, sizeof(readLine), frcFile );
  lineNum++;
  
  if( eof_test == NULL ){
    fprintf( stderr, 
             "Error in reading Bonds from force file at line %d.\n",
             lineNum );
    exit(8);
  }

  while( readLine[0] != '#' && eof_test != NULL ){
    
    if( readLine[0] != '!' ){
      
      the_token = strtok( readLine, " \n\t,;" );
      if( the_token != NULL ){
        
        strcpy( currentBondType->nameA, the_token );
        
        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing BondTypes: line %d\n", lineNum );
          exit(8);
        }

        strcpy( currentBondType->nameB, the_token );

        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing BondTypes: line %d\n", lineNum );
          exit(8);
        }

        strcpy( currentBondType->type, the_token );

        if( !strcmp( currentBondType->type, "fixed" ) ){
          if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
            fprintf( stderr, "Error parseing BondTypes: line %d\n", lineNum );
            exit(8);
          }
          
          sscanf( the_token, "%lf", &currentBondType->d0 );
        }
        
        else{
          fprintf(stderr, 
                  "Unknown TraPPE_Ex bond type \"%s\" at line %d\n",
                  currentBondType->type,
                  lineNum );
          exit(8);
        }                 
      }
    }
    
    tempBondType = new LinkedType;
    currentBondType->next = tempBondType;
    currentBondType = tempBondType;
    
    eof_test = fgets( readLine, sizeof(readLine), frcFile );
    lineNum++;
  }

  
  // initialize the Bonds
  

  for( i=0; i<nBonds; i++ ){
    
    a = the_bonds[i].a;
    b = the_bonds[i].b;

    atomA = the_atoms[a]->getType();
    atomB = the_atoms[b]->getType();
    currentBondType = headBondType->find( atomA, atomB );
    if( currentBondType == NULL ){
      fprintf( stderr, "BondType error, %s - %s not found in force file.\n",
               atomA, atomB );
      exit(8);
    }
    
    if( !strcmp( currentBondType->type, "fixed" ) ){
      
      the_sris[i] = new ConstrainedBond( *the_atoms[a], 
                                         *the_atoms[b],
                                         currentBondType->d0 );
      entry_plug->n_constraints++;
    }
  }


  // clean up the memory
  
  delete headBondType;

}

void TraPPE_ExFF::initializeBends( bend_set* the_bends ){
  
  class LinkedType {
  public:
    LinkedType(){ 
      next = NULL;
      nameA[0] = '\0';
      nameB[0] = '\0';
      nameC[0] = '\0';
      type[0] = '\0';
    }
    ~LinkedType(){ if( next != NULL ) delete next; }

    LinkedType* find( char* key1, char* key2, char* key3 ){ 
      if( !strcmp( nameA, key1 ) && !strcmp( nameB, key2 ) 
          && !strcmp( nameC, key3 ) ) return this;
      if( !strcmp( nameA, key3 ) && !strcmp( nameB, key2 ) 
          && !strcmp( nameC, key1 ) ) return this;
      if( next != NULL ) return next->find(key1, key2, key3);
      return NULL;
    }
    
    char nameA[15];
    char nameB[15];
    char nameC[15];
    char type[30];
    double k1, k2, k3, t0;

    LinkedType* next;
  };
  
  LinkedType* headBendType; 
  LinkedType* currentBendType;
  LinkedType* tempBendType;

  char readLine[500];
  char* the_token;
  char* eof_test;
  int foundBend = 0;
  int lineNum = 0;
  int i, a, b, c, index;
  char* atomA;
  char* atomB;
  char* atomC;
  QuadraticBend* qBend;

  SRI **the_sris;
  Atom** the_atoms;
  int nBends;
  the_sris = entry_plug->sr_interactions;
  the_atoms = entry_plug->atoms;
  nBends = entry_plug->n_bends;

  // read in the bend types.

  rewind( frcFile );
  headBendType = new LinkedType;
  currentBendType = headBendType;
  
  eof_test = fgets( readLine, sizeof(readLine), frcFile );
  lineNum++;
  if( eof_test == NULL ){
    fprintf( stderr, "Error in reading Bends from force file.\n" );
    exit(8);
  }

  
  while( !foundBend ){
    while( eof_test != NULL && readLine[0] != '#' ){
      eof_test = fgets( readLine, sizeof(readLine), frcFile );
      lineNum++;
    }
    if( eof_test == NULL ){
      fprintf( stderr, 
               "Error in reading Bends from force file at line %d.\n",
               lineNum );
      exit(8);
    }

    the_token = strtok( readLine, " ,;\t#\n" );
    foundBend = !strcmp( "BendTypes", the_token );
    
    if( !foundBend ){
      eof_test = fgets( readLine, sizeof(readLine), frcFile );
      lineNum++;

      if( eof_test == NULL ){
        fprintf( stderr, 
                 "Error in reading Bends from force file at line %d.\n",
                 lineNum );
        exit(8);
      } 
    }
  }

  // we are now at the BendTypes section.

  eof_test = fgets( readLine, sizeof(readLine), frcFile );
  lineNum++;
  
  if( eof_test == NULL ){
    fprintf( stderr, 
             "Error in reading Bends from force file at line %d.\n",
             lineNum );
    exit(8);
  }

  while( readLine[0] != '#' && eof_test != NULL ){
    
    if( readLine[0] != '!' ){
      
      the_token = strtok( readLine, " \n\t,;" );
      if( the_token != NULL ){
        
        strcpy( currentBendType->nameA, the_token );
        
        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing BendTypes: line %d\n", lineNum );
          exit(8);
        }

        strcpy( currentBendType->nameB, the_token );

        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing BendTypes: line %d\n", lineNum );
          exit(8);
        }

        strcpy( currentBendType->nameC, the_token );

        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing BendTypes: line %d\n", lineNum );
          exit(8);
        }

        strcpy( currentBendType->type, the_token );

        if( !strcmp( currentBendType->type, "quadratic" ) ){
          if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
            fprintf( stderr, "Error parseing BendTypes: line %d\n", lineNum );
            exit(8);
          }
          
          sscanf( the_token, "%lf", &currentBendType->k1 );

          if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
            fprintf( stderr, "Error parseing BendTypes: line %d\n", lineNum );
            exit(8);
          }
          
          sscanf( the_token, "%lf", &currentBendType->k2 );

          if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
            fprintf( stderr, "Error parseing BendTypes: line %d\n", lineNum );
            exit(8);
          }
          
          sscanf( the_token, "%lf", &currentBendType->k3 );

          if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
            fprintf( stderr, "Error parseing BendTypes: line %d\n", lineNum );
            exit(8);
          }
          
          sscanf( the_token, "%lf", &currentBendType->t0 );
        }
        
        else{
          fprintf(stderr, 
                  "Unknown TraPPE_Ex bend type \"%s\" at line %d\n",
                  currentBendType->type,
                  lineNum );
          exit(8);
        }                 
      }
    }
    
    tempBendType = new LinkedType;
    currentBendType->next = tempBendType;
    currentBendType = tempBendType;
    
    eof_test = fgets( readLine, sizeof(readLine), frcFile );
    lineNum++;
  }

  
  // initialize the Bends

  for( i=0; i<nBends; i++ ){
    
    a = the_bends[i].a;
    b = the_bends[i].b;
    c = the_bends[i].c;

    atomA = the_atoms[a]->getType();
    atomB = the_atoms[b]->getType();
    atomC = the_atoms[c]->getType();
    currentBendType = headBendType->find( atomA, atomB, atomC );
    if( currentBendType == NULL ){
      fprintf( stderr, "BendType error, %s - %s - %s not found"
               " in force file.\n",
               atomA, atomB, atomC );
      exit(8);
    }
    
    if( !strcmp( currentBendType->type, "quadratic" ) ){
      
      index = i + entry_plug->n_bonds;
      qBend = new QuadraticBend( *the_atoms[a], 
                                 *the_atoms[b],
                                 *the_atoms[c] );
      qBend->setConstants( currentBendType->k1,
                           currentBendType->k2,
                           currentBendType->k3,
                           currentBendType->t0 );
      the_sris[index] = qBend;
    }
  }


  // clean up the memory
  
  delete headBendType;

}

void TraPPE_ExFF::initializeTorsions( torsion_set* the_torsions ){

  class LinkedType {
  public:
    LinkedType(){ 
      next = NULL;
      nameA[0] = '\0';
      nameB[0] = '\0';
      nameC[0] = '\0';
      type[0] = '\0';
    }
    ~LinkedType(){ if( next != NULL ) delete next; }

    LinkedType* find( char* key1, char* key2, char* key3, char* key4 ){ 
      if( !strcmp( nameA, key1 ) && !strcmp( nameB, key2 ) &&
          !strcmp( nameC, key3 ) && !strcmp( nameD, key4 ) ) return this;

      if( !strcmp( nameA, key4 ) && !strcmp( nameB, key3 ) &&
          !strcmp( nameC, key2 ) && !strcmp( nameD, key4 ) ) return this;

      if( next != NULL ) return next->find(key1, key2, key3, key4);
      return NULL;
    }
    
    char nameA[15];
    char nameB[15];
    char nameC[15];
    char nameD[15];
    char type[30];
    double k1, k2, k3, k4;

    LinkedType* next;
  };
  
  LinkedType* headTorsionType; 
  LinkedType* currentTorsionType;
  LinkedType* tempTorsionType;

  char readLine[500];
  char* the_token;
  char* eof_test;
  int foundTorsion = 0;
  int lineNum = 0;
  int i, a, b, c, d, index;
  char* atomA;
  char* atomB;
  char* atomC;
  char* atomD;
  CubicTorsion* cTors;

  SRI **the_sris;
  Atom** the_atoms;
  int nTorsions;
  the_sris = entry_plug->sr_interactions;
  the_atoms = entry_plug->atoms;
  nTorsions = entry_plug->n_torsions;

  // read in the torsion types.

  rewind( frcFile );
  headTorsionType = new LinkedType;
  currentTorsionType = headTorsionType;
  
  eof_test = fgets( readLine, sizeof(readLine), frcFile );
  lineNum++;
  if( eof_test == NULL ){
    fprintf( stderr, "Error in reading Torsions from force file.\n" );
    exit(8);
  }

  
  while( !foundTorsion ){
    while( eof_test != NULL && readLine[0] != '#' ){
      eof_test = fgets( readLine, sizeof(readLine), frcFile );
      lineNum++;
    }
    if( eof_test == NULL ){
      fprintf( stderr, 
               "Error in reading Torsions from force file at line %d.\n",
               lineNum );
      exit(8);
    }

    the_token = strtok( readLine, " ,;\t#\n" );
    foundTorsion = !strcmp( "TorsionTypes", the_token );
    
    if( !foundTorsion ){
      eof_test = fgets( readLine, sizeof(readLine), frcFile );
      lineNum++;

      if( eof_test == NULL ){
        fprintf( stderr, 
                 "Error in reading Torsions from force file at line %d.\n",
                 lineNum );
        exit(8);
      } 
    }
  }

  // we are now at the TorsionTypes section.

  eof_test = fgets( readLine, sizeof(readLine), frcFile );
  lineNum++;
  
  if( eof_test == NULL ){
    fprintf( stderr, 
             "Error in reading Torsions from force file at line %d.\n",
             lineNum );
    exit(8);
  }

  while( readLine[0] != '#' && eof_test != NULL ){
    
    if( readLine[0] != '!' ){
      
      the_token = strtok( readLine, " \n\t,;" );
      if( the_token != NULL ){
        
        strcpy( currentTorsionType->nameA, the_token );
        
        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing TorsionTypes: line %d\n", lineNum );
          exit(8);
        }

        strcpy( currentTorsionType->nameB, the_token );

        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing TorsionTypes: line %d\n", lineNum );
          exit(8);
        }

        strcpy( currentTorsionType->nameC, the_token );

        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing TorsionTypes: line %d\n", lineNum );
          exit(8);
        }

        strcpy( currentTorsionType->nameD, the_token );

        if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
          fprintf( stderr, "Error parseing TorsionTypes: line %d\n", lineNum );
          exit(8);
        }

        strcpy( currentTorsionType->type, the_token );

        if( !strcmp( currentTorsionType->type, "cubic" ) ){
          if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
            fprintf(stderr,"Error parseing TorsionTypes: line %d\n", lineNum );
            exit(8);
          }
          
          sscanf( the_token, "%lf", &currentTorsionType->k1 );

          if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
            fprintf(stderr,"Error parseing TorsionTypes: line %d\n", lineNum );
            exit(8);
          }
          
          sscanf( the_token, "%lf", &currentTorsionType->k2 );

          if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
            fprintf(stderr,"Error parseing TorsionTypes: line %d\n", lineNum );
            exit(8);
          }
          
          sscanf( the_token, "%lf", &currentTorsionType->k3 );

          if( ( the_token = strtok( NULL, " \n\t,;" ) ) == NULL ){
            fprintf(stderr,"Error parseing TorsionTypes: line %d\n", lineNum );
            exit(8);
          }
          
          sscanf( the_token, "%lf", &currentTorsionType->k4 );
        }
        
        else{
          fprintf(stderr, 
                  "Unknown TraPPE_Ex torsion type \"%s\" at line %d\n",
                  currentTorsionType->type,
                  lineNum );
          exit(8);
        }                 
      }
    }
    
    tempTorsionType = new LinkedType;
    currentTorsionType->next = tempTorsionType;
    currentTorsionType = tempTorsionType;
    
    eof_test = fgets( readLine, sizeof(readLine), frcFile );
    lineNum++;
  }

  
  // initialize the Torsions

  for( i=0; i<nTorsions; i++ ){
    
    a = the_torsions[i].a;
    b = the_torsions[i].b;
    c = the_torsions[i].c;
    d = the_torsions[i].d;

    atomA = the_atoms[a]->getType();
    atomB = the_atoms[b]->getType();
    atomC = the_atoms[c]->getType();
    atomD = the_atoms[d]->getType();
    currentTorsionType = headTorsionType->find( atomA, atomB, atomC, atomD );
    if( currentTorsionType == NULL ){
      fprintf( stderr, "TorsionType error, %s - %s - %s - %s not found"
               " in force file.\n",
               atomA, atomB, atomC, atomD );
      exit(8);
    }
    
    if( !strcmp( currentTorsionType->type, "cubic" ) ){
      index = i + entry_plug->n_bonds + entry_plug->n_bends;
      
      cTors = new CubicTorsion( *the_atoms[a], *the_atoms[b],
                                *the_atoms[c], *the_atoms[d] );
      cTors->setConstants( currentTorsionType->k1, currentTorsionType->k2,
                           currentTorsionType->k3, currentTorsionType->k4 );
      the_sris[index] = cTors;
    }
  }


  // clean up the memory
  
  delete headTorsionType;

}
Revision:	11
Committed:	Tue Jul 9 18:40:59 2002 UTC (22 years ago) by mmeineke
File size:	22515 byte(s)
Log Message:	This commit was generated by cvs2svn to compensate for changes in r10, which included commits to RCS files with non-trunk default branches.