Trisurf Monte Carlo simulator
Samo Penic
2018-12-25 08559613e0fe7c23d329092679a2ff347a92ff4f
src/vertexmove.c
@@ -72,21 +72,31 @@
// 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
   // plane confinement check whether the new position of vertex will be out of bounds
   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;
      }
   }
//#undef SQ
//self avoidance check with distant vertices
   cellidx=vertex_self_avoidance(vesicle, vtx);
   //check occupation number
@@ -113,7 +123,8 @@
    }
    delta_energy=0;
//    vesicle_volume(vesicle);
//    fprintf(stderr,"Volume in the beginning=%1.16e\n", vesicle->volume);
@@ -187,6 +198,8 @@
    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+=
@@ -194,8 +207,25 @@
         pow(sqrt(vtx_distance_sq(&backupvtx[0], vtx->grafted_poly->vlist->vtx[0])-1),2)) *vtx->grafted_poly->k;
   }
*/
// plane confinement energy due to compressing force
   if(vesicle->tape->plane_confinement_switch){
      if(vesicle->confinement_plane.force_switch){
         //substract old energy
         if(abs(vesicle->tape->plane_d/2.0-vesicle->confinement_plane.z_max)>1e-10) {
            delta_energy-=vesicle->tape->plane_F / pow(vesicle->confinement_plane.z_max-backupvtx[0].z,2);
            delta_energy+=vesicle->tape->plane_F / pow(vesicle->confinement_plane.z_max-vtx->z,2);
         }
         if(abs(-vesicle->tape->plane_d/2.0-vesicle->confinement_plane.z_min)>1e-10) {
            delta_energy-=vesicle->tape->plane_F / pow(vesicle->confinement_plane.z_min-backupvtx[0].z,2);
            delta_energy+=vesicle->tape->plane_F / pow(vesicle->confinement_plane.z_min-vtx->z,2);
         }
      }
   }
//   fprintf(stderr, "DE=%f\n",delta_energy);
    //MONTE CARLOOOOOOOO
//   if(vtx->c!=0.0) printf("DE=%f\n",delta_energy);
    if(delta_energy>=0){
#ifdef TS_DOUBLE_DOUBLE
        if(exp(-delta_energy)< drand48())