Trisurf Monte Carlo simulator
Samo Penic
2018-09-25 5eefcc281fda031d322599fd7094da4fc8450948
src/vertexmove.c
@@ -72,21 +72,23 @@
// TODO: Maybe faster if checks only nucleus-neighboring cells
// Nucleus penetration check:
#define SQ(x) x*x
//#define SQ(x) x*x
if(vesicle->R_nucleus>0.0){
   if (SQ(vtx->x-vesicle->nucleus_center[0])+ SQ(vtx->y-vesicle->nucleus_center[1]) + SQ(vtx->z-vesicle->nucleus_center[2]) < vesicle->R_nucleus){
   if ((vtx->x-vesicle->nucleus_center[0])*(vtx->x-vesicle->nucleus_center[0])+ (vtx->y-vesicle->nucleus_center[1])*(vtx->y-vesicle->nucleus_center[1]) + (vtx->z-vesicle->nucleus_center[2])*(vtx->z-vesicle->nucleus_center[2]) < vesicle->R_nucleus){
      vtx=memcpy((void *)vtx,(void *)&backupvtx[0],sizeof(ts_vertex));
      return TS_FAIL;
   }
} else if(vesicle->R_nucleusX>0.0){
//   fprintf(stderr,"DEBUG, (Rx, Ry,Rz)^2=(%f,%f,%f)\n",vesicle->R_nucleusX, vesicle->R_nucleusY, vesicle->R_nucleusZ);
   if (SQ(vtx->x-vesicle->nucleus_center[0])/vesicle->R_nucleusX + SQ(vtx->y-vesicle->nucleus_center[1])/vesicle->R_nucleusY + SQ(vtx->z-vesicle->nucleus_center[2])/vesicle->R_nucleusZ < 1.0){
//   if (SQ(vtx->x-vesicle->nucleus_center[0])/vesicle->R_nucleusX + SQ(vtx->y-vesicle->nucleus_center[1])/vesicle->R_nucleusY + SQ(vtx->z-vesicle->nucleus_center[2])/vesicle->R_nucleusZ < 1.0){
   if ((vtx->x-vesicle->nucleus_center[0])*(vtx->x-vesicle->nucleus_center[0])/vesicle->R_nucleusX + (vtx->y-vesicle->nucleus_center[1])*(vtx->y-vesicle->nucleus_center[1])/vesicle->R_nucleusY + (vtx->z-vesicle->nucleus_center[2])*(vtx->z-vesicle->nucleus_center[2])/vesicle->R_nucleusZ < 1.0){
//   if (SQ(vtx->x)/vesicle->R_nucleusX + SQ(vtx->y)/vesicle->R_nucleusY + SQ(vtx->z)/vesicle->R_nucleusZ < 1.0){
      vtx=memcpy((void *)vtx,(void *)&backupvtx[0],sizeof(ts_vertex));
      return TS_FAIL;
   }
}
#undef SQ
//#undef SQ
//self avoidance check with distant vertices
   cellidx=vertex_self_avoidance(vesicle, vtx);
   //check occupation number
@@ -97,7 +99,13 @@
        return TS_FAIL;
    } 
   
// plane confinement test
   if(vesicle->tape->plane_confinement_switch){
      if(vtx->z > vesicle->confinement_plane.z_max || vtx->z < vesicle->confinement_plane.z_min){
            vtx=memcpy((void *)vtx,(void *)&backupvtx[0],sizeof(ts_vertex));
            return TS_FAIL;
      }
   }
//if all the tests are successful, then energy for vtx and neighbours is calculated
   for(i=0;i<vtx->neigh_no;i++){
   memcpy((void *)&backupvtx[i+1],(void *)vtx->neigh[i],sizeof(ts_vertex));
@@ -187,6 +195,8 @@
    delta_energy+=delta_energy_cv;
//    fprintf(stderr,"Denergy after=%e\n",delta_energy);
    }
/* Vertices with spontaneous curvature may have spontaneous force perpendicular to the surface of the vesicle. additional delta energy is calculated in this function */
   delta_energy+=direct_force_energy(vesicle,vtx,backupvtx);
/* No poly-bond energy for now!
   if(vtx->grafted_poly!=NULL){
      delta_energy+=
@@ -196,6 +206,18 @@
*/
//   fprintf(stderr, "DE=%f\n",delta_energy);
    //MONTE CARLOOOOOOOO
//   if(vtx->c!=0.0) printf("DE=%f\n",delta_energy);
// plane confinement
   if(vesicle->tape->plane_confinement_switch){
      //if planes are not close enough, then repusion force is on
      if(vesicle->confinement_plane.z_max-vesicle->confinement_plane.z_min > vesicle->tape->plane_d){
         //ts_fprintf(stderr,"force!!!\n");
         delta_energy-=vesicle->tape->plane_F * ( 1.0/pow(backupvtx->z-vesicle->confinement_plane.z_min,2) + 1.0/pow(-backupvtx->z+vesicle->confinement_plane.z_max,2) );
         delta_energy+=vesicle->tape->plane_F * ( 1.0/pow(vtx->z-vesicle->confinement_plane.z_min,2) + +1.0/pow(-vtx->z+vesicle->confinement_plane.z_max,2) );
      }
   }
// end plane confinement
    if(delta_energy>=0){
#ifdef TS_DOUBLE_DOUBLE
        if(exp(-delta_energy)< drand48())