From 6487a03362d35589c286d0660eba123a7ab00535 Mon Sep 17 00:00:00 2001
From: Samo Penic <samo.penic@gmail.com>
Date: Mon, 10 May 2021 11:14:04 +0000
Subject: [PATCH] Raj and Yoav session in making multiple protein species
---
src/vertexmove.c | 505 +++++++++++++++++++++++++++++++++++++++++++++++++++-----
1 files changed, 460 insertions(+), 45 deletions(-)
diff --git a/src/vertexmove.c b/src/vertexmove.c
index b575346..e74fa74 100644
--- a/src/vertexmove.c
+++ b/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"
@@ -9,72 +10,239 @@
#include "timestep.h"
#include "cell.h"
//#include "io.h"
+#include "io.h"
#include<stdio.h>
#include "vertexmove.h"
#include <string.h>
+#include "constvol.h"
-ts_bool single_verticle_timestep(ts_vesicle *vesicle,ts_vertex *vtx,ts_double
-*rn){
+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;
+ ts_double delta_energy, delta_energy_cv,oenergy,dvol=0.0, darea=0.0, dstretchenergy=0.0;
+ ts_double costheta,sintheta,phi,r;
//This will hold all the information of vtx and its neighbours
- ts_vertex **backupvtx=(ts_vertex **)calloc(vtx->neigh_no+1,sizeof(ts_vertex *));
- backupvtx[0]=(ts_vertex *)malloc(sizeof(ts_vertex));
- backupvtx[0]=(ts_vertex *)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);
- //check we if some length to neighbours are too much
+// 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;
+
+
+//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));
- free(backupvtx[0]);
- free(backupvtx);
-// fprintf(stderr,"Fail 1, dist=%f, vesicle->dmax=%f\n", dist, vesicle->dmax);
- return TS_FAIL;
+ vtx=memcpy((void *)vtx,(void *)&backupvtx[0],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,backupvtx[0],vtx);
+
+// 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;
+ }
+ }
+
+// TODO: Maybe faster if checks only nucleus-neighboring cells
+// Nucleus penetration check:
+//#define SQ(x) x*x
+if(vesicle->R_nucleus>0.0){
+ 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 ((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;
+ }
+
+}
+
+ // 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
+ 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));
- free(backupvtx[0]);
- free(backupvtx);
-// fprintf(stderr,"Fail 2\n");
+ 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
+//if all the tests are successful, then energy for vtx and neighbours is calculated
for(i=0;i<vtx->neigh_no;i++){
- backupvtx[i+1]=(ts_vertex *)malloc(sizeof(ts_vertex));
- backupvtx[i+1]=memcpy((void *)backupvtx[i+1],(void *)vtx->neigh[i],sizeof(ts_vertex));
+ memcpy((void *)&backupvtx[i+1],(void *)vtx->neigh[i],sizeof(ts_vertex));
}
+ if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch>0){
+ for(i=0;i<vtx->tristar_no;i++) dvol-=vtx->tristar[i]->volume;
+ }
+
+ if(vesicle->tape->constareaswitch==2){
+ for(i=0;i<vtx->tristar_no;i++) darea-=vtx->tristar[i]->area;
+
+ }
+ //stretching energy 1 of 3
+ if(vesicle->tape->stretchswitch==1){
+ for(i=0;i<vtx->tristar_no;i++) dstretchenergy-=vtx->tristar[i]->energy;
+ }
delta_energy=0;
+
+
+// vesicle_volume(vesicle);
+// fprintf(stderr,"Volume in the beginning=%1.16e\n", vesicle->volume);
+
//update the normals of triangles that share bead i.
for(i=0;i<vtx->tristar_no;i++) triangle_normal_vector(vtx->tristar[i]);
- //energy and curvature
+ oenergy=vtx->energy;
energy_vertex(vtx);
- delta_energy=vtx->xk*(vtx->energy - backupvtx[0]->energy);
+ delta_energy=vtx->xk*(vtx->energy - oenergy);
//the same is done for neighbouring vertices
for(i=0;i<vtx->neigh_no;i++){
oenergy=vtx->neigh[i]->energy;
energy_vertex(vtx->neigh[i]);
delta_energy+=vtx->neigh[i]->xk*(vtx->neigh[i]->energy-oenergy);
}
+
+ if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch >0){
+ for(i=0;i<vtx->tristar_no;i++) dvol+=vtx->tristar[i]->volume;
+ if(vesicle->pswitch==1) delta_energy-=vesicle->pressure*dvol;
+ };
+
+ if(vesicle->tape->constareaswitch==2){
+ /* check whether the darea is gt epsarea */
+ for(i=0;i<vtx->tristar_no;i++) darea+=vtx->tristar[i]->area;
+ if(fabs(vesicle->area+darea-A0)>epsarea){
+ //restore old state.
+ 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]);
+ //fprintf(stderr,"fajlam!\n");
+ return TS_FAIL;
+ }
+
+
+ }
+
+ if(vesicle->tape->constvolswitch==2){
+ /*check whether the dvol is gt than epsvol */
+ //fprintf(stderr,"DVOL=%1.16e\n",dvol);
+ if(fabs(vesicle->volume+dvol-V0)>epsvol){
+ //restore old state.
+ 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]);
+ //fprintf(stderr,"fajlam!\n");
+ return TS_FAIL;
+ }
+
+ } else
+// vesicle_volume(vesicle);
+// fprintf(stderr,"Volume before=%1.16e\n", vesicle->volume);
+ if(vesicle->tape->constvolswitch == 1){
+ retval=constvolume(vesicle, vtx, -dvol, &delta_energy_cv, &constvol_vtx_moved,&constvol_vtx_backup);
+ if(retval==TS_FAIL){ // if we couldn't move the vertex to assure constant volume
+ 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]);
+ // fprintf(stderr,"fajlam!\n");
+ return TS_FAIL;
+ }
+// vesicle_volume(vesicle);
+// fprintf(stderr,"Volume after=%1.16e\n", vesicle->volume);
+// fprintf(stderr,"Volume after-dvol=%1.16e\n", vesicle->volume-dvol);
+// fprintf(stderr,"Denergy before=%e\n",delta_energy);
+
+ 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);
+
+ //stretching energy 2 of 3
+ if(vesicle->tape->stretchswitch==1){
+ for(i=0;i<vtx->tristar_no;i++){
+ stretchenergy(vesicle, vtx->tristar[i]);
+ dstretchenergy+=vtx->tristar[i]->energy;
+ }
+ }
+
+ delta_energy+=dstretchenergy;
+
+/* No poly-bond energy for now!
+ if(vtx->grafted_poly!=NULL){
+ delta_energy+=
+ (pow(sqrt(vtx_distance_sq(vtx, vtx->grafted_poly->vlist->vtx[0])-1),2)-
+ 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() )
+ if(exp(-delta_energy)< drand48())
#endif
#ifdef TS_DOUBLE_FLOAT
if(expf(-delta_energy)< (ts_float)drand48())
@@ -84,31 +252,278 @@
#endif
{
//not accepted, reverting changes
- vtx=memcpy((void *)vtx,(void *)backupvtx[0],sizeof(ts_vertex));
- free(backupvtx[0]);
+ // fprintf(stderr,"MC failed\n");
+ 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));
- free(backupvtx[i+1]);
+ vtx->neigh[i]=memcpy((void *)vtx->neigh[i],(void *)&backupvtx[i+1],sizeof(ts_vertex));
}
- free(backupvtx);
-// fprintf(stderr,"Reverted\n");
//update the normals of triangles that share bead i.
- for(i=0;i<vtx->tristar_no;i++) triangle_normal_vector(vtx->tristar[i]);
+ for(i=0;i<vtx->tristar_no;i++) triangle_normal_vector(vtx->tristar[i]);
+ //stretching energy 3 of 3
+ if(vesicle->tape->stretchswitch==1){
+ for(i=0;i<vtx->tristar_no;i++){
+ stretchenergy(vesicle,vtx->tristar[i]);
+ }
+ }
+// fprintf(stderr, "before vtx(x,y,z)=%e,%e,%e\n",constvol_vtx_moved->x, constvol_vtx_moved->y, constvol_vtx_moved->z);
+ if(vesicle->tape->constvolswitch == 1){
+ constvolumerestore(constvol_vtx_moved,constvol_vtx_backup);
+ }
+// fprintf(stderr, "after vtx(x,y,z)=%e,%e,%e\n",constvol_vtx_moved->x, constvol_vtx_moved->y, constvol_vtx_moved->z);
+// vesicle_volume(vesicle);
+// fprintf(stderr,"Volume after fail=%1.16e\n", vesicle->volume);
return TS_FAIL;
}
}
- //END MONTE CARLOOOOOOO
-
- //TODO: change cell occupation if necessary!
-// fprintf(stderr,"Success!!\n");
- free(backupvtx[0]);
- for(i=0;i<vtx->neigh_no;i++){
- free(backupvtx[i+1]);
+ //accepted
+ // fprintf(stderr,"MC accepted\n");
+// 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[0].cell,vtx);
+
}
- free(backupvtx);
-// fprintf(stderr,"Accepted\n");
+
+ if(vesicle->tape->constvolswitch == 2){
+ vesicle->volume+=dvol;
+ } else
+ if(vesicle->tape->constvolswitch == 1){
+ constvolumeaccept(vesicle,constvol_vtx_moved,constvol_vtx_backup);
+ }
+
+ if(vesicle->tape->constareaswitch==2){
+ vesicle->area+=darea;
+ }
+// if(oldcellidx);
+ //END MONTE CARLOOOOOOO
+// vesicle_volume(vesicle);
+// fprintf(stderr,"Volume after success=%1.16e\n", vesicle->volume);
return TS_SUCCESS;
}
+
+ts_bool single_poly_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;
+ //This will hold all the information of vtx and its neighbours
+ ts_vertex backupvtx;
+// ts_bond backupbond[2];
+ 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->neigh_no;i++){
+ dist=vtx_distance_sq(vtx,vtx->neigh[i]);
+ if(dist<1.0 || dist>vesicle->dmax) {
+ vtx=memcpy((void *)vtx,(void *)&backupvtx,sizeof(ts_vertex));
+ return TS_FAIL;
+ }
+ }
+
+// Distance with grafted vesicle-vertex check:
+ if(vtx==poly->vlist->vtx[0]){
+ dist=vtx_distance_sq(vtx,poly->grafted_vtx);
+ if(dist<1.0 || dist>vesicle->dmax) {
+ 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;
+ }
+
+
+ //if all the tests are successful, then energy for vtx and neighbours is calculated
+/* Energy ignored for now!
+ delta_energy=0;
+ for(i=0;i<vtx->bond_no;i++){
+ memcpy((void *)&backupbond[i],(void *)vtx->bond[i],sizeof(ts_bond));
+
+ vtx->bond[i]->bond_length=sqrt(vtx_distance_sq(vtx->bond[i]->vtx1,vtx->bond[i]->vtx2));
+ bond_energy(vtx->bond[i],poly);
+ delta_energy+= vtx->bond[i]->energy - backupbond[i].energy;
+ }
+
+ if(vtx==poly->vlist->vtx[0]){
+ delta_energy+=
+ (pow(sqrt(vtx_distance_sq(vtx, poly->grafted_vtx)-1),2)-
+ pow(sqrt(vtx_distance_sq(&backupvtx, poly->grafted_vtx)-1),2)) *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->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;
+}
+
+
+
+
+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;
+}
--
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