Added direct force plugin and fixes in stretching energy

Samo Penic

2019-03-09 2c4278db6ead5c27e30a3000097ed898c968534e

 src/vertexmove.c

@@ -1,3 +1,4 @@
/* vim: set ts=4 sts=4 sw=4 noet : */
#include<stdlib.h>
#include<math.h>
#include "general.h"
@@ -8,87 +9,60 @@
#include "energy.h"
#include "timestep.h"
#include "cell.h"
//#include "io.h"
#include "io.h"
#include<stdio.h>
#include "vertexmove.h"
#include <string.h>
#include "constvol.h"
#include "plugins.h"

ts_bool single_verticle_timestep(ts_vesicle *vesicle,ts_vertex *vtx,ts_double *rn){
    ts_uint i;
    ts_double dist;
    ts_bool retval; 
    ts_uint cellidx; 
    ts_double delta_energy,oenergy,dvol=0.0;
    ts_double delta_energy, oenergy;
    ts_double costheta,sintheta,phi,r;
   //This will hold all the information of vtx and its neighbours
   ts_vertex backupvtx[20];
   memcpy((void *)&backupvtx[0],(void *)vtx,sizeof(ts_vertex));
    ts_vertex backupvtx[20]; // *constvol_vtx_moved=NULL, *constvol_vtx_backup=NULL;
    memcpy((void *)&backupvtx[0],(void *)vtx,sizeof(ts_vertex));

   //Some stupid tests for debugging cell occupation!
/*        cellidx=vertex_self_avoidance(vesicle, vtx);
   if(vesicle->clist->cell[cellidx]==vtx->cell){
      fprintf(stderr,"Idx match!\n");
   } else {
      fprintf(stderr,"***** Idx don't match!\n");
      fatal("ENding.",1);
   }
*/

       //temporarly moving the vertex
//   vtx->x=vtx->x+vesicle->stepsize*(2.0*rn[0]-1.0);
//       vtx->y=vtx->y+vesicle->stepsize*(2.0*rn[1]-1.0);
//       vtx->z=vtx->z+vesicle->stepsize*(2.0*rn[2]-1.0);

   //random move in a sphere with radius stepsize:
   r=vesicle->stepsize*rn[0];
   phi=rn[1]*2*M_PI;
   costheta=2*rn[2]-1;
   sintheta=sqrt(1-pow(costheta,2));
   vtx->x=vtx->x+r*sintheta*cos(phi);
   vtx->y=vtx->y+r*sintheta*sin(phi);
   vtx->z=vtx->z+r*costheta;
    //random move in a sphere with radius stepsize:
    r=vesicle->stepsize*rn[0];
    phi=rn[1]*2*M_PI;
    costheta=2*rn[2]-1;
    sintheta=sqrt(1-pow(costheta,2));
    vtx->x=vtx->x+r*sintheta*cos(phi);
    vtx->y=vtx->y+r*sintheta*sin(phi);
    vtx->z=vtx->z+r*costheta;


       //distance with neighbours check
    for(i=0;i<vtx->neigh_no;i++){
        dist=vtx_distance_sq(vtx,vtx->neigh[i]);
        if(dist<1.0 || dist>vesicle->dmax) {
      vtx=memcpy((void *)vtx,(void *)&backupvtx[0],sizeof(ts_vertex));
      return TS_FAIL;
/* Entry point for plugin vm_hard_constraint() function */
   vesicle->plist->pointer=vesicle->plist->chain->vm_hard_constraint;
   while(vesicle->plist->pointer!=NULL){
      retval = vesicle->plist->pointer->plugin->function->vm_hard_constraint(vesicle,vtx, &backupvtx[0]);
      if(retval==TS_FAIL){
         vtx=memcpy((void *)vtx,(void *)&backupvtx[0],sizeof(ts_vertex));
         return TS_FAIL;
      }
    }

// Distance with grafted poly-vertex check:	
   if(vtx->grafted_poly!=NULL){
      dist=vtx_distance_sq(vtx,vtx->grafted_poly->vlist->vtx[0]);
        if(dist<1.0 || dist>vesicle->dmax) {
      vtx=memcpy((void *)vtx,(void *)&backupvtx[0],sizeof(ts_vertex));
      return TS_FAIL;
      }
      vesicle->plist->pointer=vesicle->plist->pointer->next;
   }
/* End of vm_hard_constraint() */

    //self avoidance check with distant vertices
     cellidx=vertex_self_avoidance(vesicle, vtx);
    //check occupation number
     retval=cell_occupation_number_and_internal_proximity(vesicle->clist,cellidx,vtx);
	
    if(retval==TS_FAIL){
      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
/* Backuping the neighbours */ 
   for(i=0;i<vtx->neigh_no;i++){
   memcpy((void *)&backupvtx[i+1],(void *)vtx->neigh[i],sizeof(ts_vertex));
   }

   if(vesicle->pswitch == 1){
      for(i=0;i<vtx->tristar_no;i++) dvol-=vtx->tristar[i]->volume;
   };
/* Entry point for plugin vm_energy_before_prepare() */

    delta_energy=0;
    //update the normals of triangles that share bead i.
   vesicle->plist->pointer=vesicle->plist->chain->vm_energy_before_prepare;
   while(vesicle->plist->pointer!=NULL){
      vesicle->plist->pointer->plugin->function->vm_energy_before_prepare(vesicle, vtx);
      vesicle->plist->pointer=vesicle->plist->pointer->next;
   }
/* End of vm_energy_before_prepare() */

//update the normals of triangles that share bead i.
    for(i=0;i<vtx->tristar_no;i++) triangle_normal_vector(vtx->tristar[i]);
   oenergy=vtx->energy;
    energy_vertex(vtx);
@@ -100,10 +74,15 @@
        delta_energy+=vtx->neigh[i]->xk*(vtx->neigh[i]->energy-oenergy);
    }

   if(vesicle->pswitch == 1){
      for(i=0;i<vtx->tristar_no;i++) dvol+=vtx->tristar[i]->volume;
      delta_energy-=vesicle->pressure*dvol;
   };
/* Entry point for plugin vm_energy_after_execute() */

   vesicle->plist->pointer=vesicle->plist->chain->vm_energy_after_execute;
   while(vesicle->plist->pointer!=NULL){
      delta_energy+=vesicle->plist->pointer->plugin->function->vm_energy_after_execute(vesicle, vtx, backupvtx);
      vesicle->plist->pointer=vesicle->plist->pointer->next;
   }
/* End of vm_energy_after_execute() */


/* No poly-bond energy for now!
   if(vtx->grafted_poly!=NULL){
@@ -112,11 +91,33 @@
         pow(sqrt(vtx_distance_sq(&backupvtx[0], vtx->grafted_poly->vlist->vtx[0])-1),2)) *vtx->grafted_poly->k;
   }
*/


/* Entry point for plugin vm_before_montecarlo_constraint() function */
   vesicle->plist->pointer=vesicle->plist->chain->vm_before_montecarlo_constraint;
   while(vesicle->plist->pointer!=NULL){
      retval = vesicle->plist->pointer->plugin->function->vm_before_montecarlo_constraint(vesicle,vtx, &backupvtx[0]);
      if(retval==TS_FAIL){
         vtx=memcpy((void *)vtx,(void *)&backupvtx[0],sizeof(ts_vertex));
         for(i=0;i<vtx->neigh_no;i++){
            vtx->neigh[i]=memcpy((void *)vtx->neigh[i],(void *)&backupvtx[i+1],sizeof(ts_vertex));
            }
         for(i=0;i<vtx->tristar_no;i++) triangle_normal_vector(vtx->tristar[i]); 
         return TS_FAIL;
      }
      vesicle->plist->pointer=vesicle->plist->pointer->next;
   }
/* End of vm_before_montecarlo_constraint() */





//   fprintf(stderr, "DE=%f\n",delta_energy);
    //MONTE CARLOOOOOOOO
    if(delta_energy>=0){
#ifdef TS_DOUBLE_DOUBLE
        if(exp(-delta_energy)< drand48() )
        if(exp(-delta_energy)< drand48())
#endif
#ifdef TS_DOUBLE_FLOAT
        if(expf(-delta_energy)< (ts_float)drand48())
@@ -125,30 +126,48 @@
        if(expl(-delta_energy)< (ts_ldouble)drand48())
#endif
    {
    //not accepted, reverting changes
/*************************************************** MC step rejected **************************************************************/
   vtx=memcpy((void *)vtx,(void *)&backupvtx[0],sizeof(ts_vertex));
   for(i=0;i<vtx->neigh_no;i++){
      vtx->neigh[i]=memcpy((void *)vtx->neigh[i],(void *)&backupvtx[i+1],sizeof(ts_vertex));
   }
   
    //update the normals of triangles that share bead i.
   for(i=0;i<vtx->tristar_no;i++) triangle_normal_vector(vtx->tristar[i]);
   //update the normals of triangles that share bead i.
   for(i=0;i<vtx->tristar_no;i++) triangle_normal_vector(vtx->tristar[i]);


/* Entry point for plugin vm_before_montecarlo_constraint() function */
   vesicle->plist->pointer=vesicle->plist->chain->vm_new_state_rejected;
   while(vesicle->plist->pointer!=NULL){
      vesicle->plist->pointer->plugin->function->vm_new_state_rejected(vesicle,vtx, &backupvtx[0]);
      vesicle->plist->pointer=vesicle->plist->pointer->next;
   }
/* End of vm_before_montecarlo_constraint() */


    return TS_FAIL; 
    }
}
		
//   oldcellidx=vertex_self_avoidance(vesicle, &backupvtx[0]);
/*************************************************** MC step accepted **************************************************************/
   cellidx=vertex_self_avoidance(vesicle, vtx);
   if(vtx->cell!=vesicle->clist->cell[cellidx]){
      retval=cell_add_vertex(vesicle->clist->cell[cellidx],vtx);
//      if(retval==TS_SUCCESS) cell_remove_vertex(vesicle->clist->cell[oldcellidx],vtx);
      if(retval==TS_SUCCESS) cell_remove_vertex(backupvtx[0].cell,vtx);
		
      if(retval==TS_SUCCESS) cell_remove_vertex(backupvtx[0].cell,vtx);	
   }
//   if(oldcellidx);
    //END MONTE CARLOOOOOOO

/* Entry point for plugin vm_before_montecarlo_constraint() function */
   vesicle->plist->pointer=vesicle->plist->chain->vm_new_state_accepted;
   while(vesicle->plist->pointer!=NULL){
      vesicle->plist->pointer->plugin->function->vm_new_state_accepted(vesicle,vtx, &backupvtx[0]);
      vesicle->plist->pointer=vesicle->plist->pointer->next;
   }
/* End of vm_before_montecarlo_constraint() */

    return TS_SUCCESS;
}





ts_bool single_poly_vertex_move(ts_vesicle *vesicle,ts_poly *poly,ts_vertex *vtx,ts_double *rn){
@@ -254,3 +273,122 @@
    //END MONTE CARLOOOOOOO
    return TS_SUCCESS;
}




ts_bool single_filament_vertex_move(ts_vesicle *vesicle,ts_poly *poly,ts_vertex *vtx,ts_double *rn){
   ts_uint i;
   ts_bool retval; 
   ts_uint cellidx; 
   ts_double delta_energy;
   ts_double costheta,sintheta,phi,r;
   ts_double dist[2];
   //This will hold all the information of vtx and its neighbours
   ts_vertex backupvtx,backupneigh[2];
   ts_bond backupbond[2];

   //backup vertex:		
   memcpy((void *)&backupvtx,(void *)vtx,sizeof(ts_vertex));

   //random move in a sphere with radius stepsize:
   r=vesicle->stepsize*rn[0];
   phi=rn[1]*2*M_PI;
   costheta=2*rn[2]-1;
   sintheta=sqrt(1-pow(costheta,2));
   vtx->x=vtx->x+r*sintheta*cos(phi);
   vtx->y=vtx->y+r*sintheta*sin(phi);
   vtx->z=vtx->z+r*costheta;


   //distance with neighbours check
   for(i=0;i<vtx->bond_no;i++){
      dist[i]=vtx_distance_sq(vtx->bond[i]->vtx1,vtx->bond[i]->vtx2);
      if(dist[i]<1.0 || dist[i]>vesicle->dmax) {
         vtx=memcpy((void *)vtx,(void *)&backupvtx,sizeof(ts_vertex));
         return TS_FAIL;
      }
   }

// TODO: Maybe faster if checks only nucleus-neighboring cells
// Nucleus penetration check:
   if (vtx->x*vtx->x + vtx->y*vtx->y + vtx->z*vtx->z < vesicle->R_nucleus){
      vtx=memcpy((void *)vtx,(void *)&backupvtx,sizeof(ts_vertex));
      return TS_FAIL;
   }


   //self avoidance check with distant vertices
   cellidx=vertex_self_avoidance(vesicle, vtx);
   //check occupation number
   retval=cell_occupation_number_and_internal_proximity(vesicle->clist,cellidx,vtx);
   if(retval==TS_FAIL){
      vtx=memcpy((void *)vtx,(void *)&backupvtx,sizeof(ts_vertex));
        return TS_FAIL;
   } 

   //backup bonds
   for(i=0;i<vtx->bond_no;i++){
      memcpy(&backupbond[i],vtx->bond[i], sizeof(ts_bond));
      vtx->bond[i]->bond_length=sqrt(dist[i]);
      bond_vector(vtx->bond[i]);
   }

   //backup neighboring vertices:
   for(i=0;i<vtx->neigh_no;i++){
      memcpy(&backupneigh[i],vtx->neigh[i], sizeof(ts_vertex));
   }
	
   //if all the tests are successful, then energy for vtx and neighbours is calculated
   delta_energy=0;
	
   if(vtx->bond_no == 2){
      vtx->energy = -(vtx->bond[0]->x*vtx->bond[1]->x + vtx->bond[0]->y*vtx->bond[1]->y + vtx->bond[0]->z*vtx->bond[1]->z)/vtx->bond[0]->bond_length/vtx->bond[1]->bond_length;
      delta_energy += vtx->energy - backupvtx.energy;
   }

   for(i=0;i<vtx->neigh_no;i++){
      if(vtx->neigh[i]->bond_no == 2){
         vtx->neigh[i]->energy = -(vtx->neigh[i]->bond[0]->x*vtx->neigh[i]->bond[1]->x + vtx->neigh[i]->bond[0]->y*vtx->neigh[i]->bond[1]->y + vtx->neigh[i]->bond[0]->z*vtx->neigh[i]->bond[1]->z)/vtx->neigh[i]->bond[0]->bond_length/vtx->neigh[i]->bond[1]->bond_length;
         delta_energy += vtx->neigh[i]->energy - backupneigh[i].energy;
      }
   }

   // poly->k is filament persistence length (in units l_min)
   delta_energy *= poly->k;

   if(delta_energy>=0){
#ifdef TS_DOUBLE_DOUBLE
        if(exp(-delta_energy)< drand48() )
#endif
#ifdef TS_DOUBLE_FLOAT
        if(expf(-delta_energy)< (ts_float)drand48())
#endif
#ifdef TS_DOUBLE_LONGDOUBLE
        if(expl(-delta_energy)< (ts_ldouble)drand48())
#endif
       {
   //not accepted, reverting changes
   vtx=memcpy((void *)vtx,(void *)&backupvtx,sizeof(ts_vertex));
   for(i=0;i<vtx->neigh_no;i++){
      memcpy(vtx->neigh[i],&backupneigh[i],sizeof(ts_vertex));
   }
   for(i=0;i<vtx->bond_no;i++){
      vtx->bond[i]=memcpy((void *)vtx->bond[i],(void *)&backupbond[i],sizeof(ts_bond));
   }

    return TS_FAIL; 
   }
   }
	
	
//   oldcellidx=vertex_self_avoidance(vesicle, &backupvtx[0]);
   if(vtx->cell!=vesicle->clist->cell[cellidx]){
      retval=cell_add_vertex(vesicle->clist->cell[cellidx],vtx);
//      if(retval==TS_SUCCESS) cell_remove_vertex(vesicle->clist->cell[oldcellidx],vtx);
      if(retval==TS_SUCCESS) cell_remove_vertex(backupvtx.cell,vtx);	
   }
//   if(oldcellidx);
    //END MONTE CARLOOOOOOO
    return TS_SUCCESS;
}