From 0652ee2715994b48a9bbfd1132bf0b65ad206289 Mon Sep 17 00:00:00 2001
From: Samo Penic <samo.penic@gmail.com>
Date: Wed, 27 Nov 2013 18:46:13 +0000
Subject: [PATCH] commiting all changes.

---
 src/vertexmove.c |  113 +++++++++++++++++++++++++++++++++-----------------------
 1 files changed, 67 insertions(+), 46 deletions(-)

diff --git a/src/vertexmove.c b/src/vertexmove.c
index c62aeda..a597958 100644
--- a/src/vertexmove.c
+++ b/src/vertexmove.c
@@ -11,6 +11,7 @@
 //#include "io.h"
 #include<stdio.h>
 #include "vertexmove.h"
+#include <string.h>
 
 ts_bool single_verticle_timestep(ts_vesicle *vesicle,ts_vertex *vtx,ts_double
 *rn){
@@ -18,50 +19,69 @@
     ts_double dist;
     ts_bool retval; 
     ts_uint cellidx; 
-    ts_double xold,yold,zold;
     ts_double delta_energy,oenergy;
-    ts_vertex *ovtx;
-    ts_vertex *tvtx=(ts_vertex *)calloc(1,sizeof(ts_vertex));
+    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));
 
-    //randomly we move the temporary vertex
-	tvtx->x=vtx->x+vesicle->stepsize*(2.0*rn[0]-1.0);
-    tvtx->y=vtx->y+vesicle->stepsize*(2.0*rn[1]-1.0);
-    tvtx->z=vtx->z+vesicle->stepsize*(2.0*rn[2]-1.0);
-    //check we if some length to neighbours are too much
+	//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;
+
+
+    	//distance with neighbours check
     for(i=0;i<vtx->neigh_no;i++){
-        dist=vtx_distance_sq(tvtx,vtx->neigh[i]);
+        dist=vtx_distance_sq(vtx,vtx->neigh[i]);
         if(dist<1.0 || dist>vesicle->dmax) {
-		vtx_free(tvtx);
-//	fprintf(stderr,"Fail 1, dist=%f, vesicle->dmax=%f\n", dist, vesicle->dmax);
+		vtx=memcpy((void *)vtx,(void *)&backupvtx[0],sizeof(ts_vertex));
 		return TS_FAIL;
 		}
     }
     //self avoidance check with distant vertices
-     cellidx=vertex_self_avoidance(vesicle, tvtx);
+     cellidx=vertex_self_avoidance(vesicle, vtx);
     //check occupation number
-     retval=cell_occupation_number_and_internal_proximity(vesicle->clist,cellidx,vtx,tvtx);
+     retval=cell_occupation_number_and_internal_proximity(vesicle->clist,cellidx,vtx);
+	
     if(retval==TS_FAIL){
-	vtx_free(tvtx);
-//	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 we update the vertex position
-    xold=vtx->x;
-    yold=vtx->y;
-    zold=vtx->z;
-    ovtx=malloc(sizeof(ts_vertex));
-    vtx_copy(ovtx,vtx);
-    vtx->x=tvtx->x;
-    vtx->y=tvtx->y;
-    vtx->z=tvtx->z;
+   
+ 
+    //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));
+	}
+
+
 
     delta_energy=0;
     //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 - ovtx->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;
@@ -82,30 +102,31 @@
 #endif
     {
     //not accepted, reverting changes
-    vtx->x=xold;
-    vtx->y=yold;
-    vtx->z=zold;
+	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]);
-    //energy and curvature
-    energy_vertex(vtx);
-    //the same is done for neighbouring vertices
-	for(i=0;i<vtx->neigh_no;i++) energy_vertex(vtx->neigh[i]);
-	free(ovtx->bond_length);
-    free(ovtx->bond_length_dual);
-    free(ovtx);
-    vtx_free(tvtx);
+	//TODO: check if we could backup that too?
+   for(i=0;i<vtx->tristar_no;i++) triangle_normal_vector(vtx->tristar[i]);
+
     return TS_FAIL; 
     }
 }
-    //END MONTE CARLOOOOOOO
 
-    //TODO: change cell occupation if necessary!
-//	fprintf(stderr,"Success!!\n");
-    free(ovtx->bond_length);
-    free(ovtx->bond_length_dual);
-    free(ovtx);
-    vtx_free(tvtx);
+//TODO: IS THAT REALLY NECESSARY?
+
+/*		
+	if(vtx->cell!=vesicle->clist->cell[cellidx]){
+		pthread_mutex_lock(&vesicle->mutex->cell_modify);
+		retval=cell_add_vertex(vesicle->clist->cell[cellidx],vtx);
+		if(retval==TS_SUCCESS) cell_remove_vertex(backupvtx[0].cell,vtx);
+		pthread_mutex_unlock(&vesicle->mutex->cell_modify);
+	}
+*/
+
+    //END MONTE CARLOOOOOOO
     return TS_SUCCESS;
 }
 

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