From c0ae90d68622063a44af443acc01f7e4925fbc56 Mon Sep 17 00:00:00 2001
From: Samo Penic <samo.penic@fe.uni-lj.si>
Date: Thu, 18 Sep 2014 10:17:22 +0000
Subject: [PATCH] Added constant area. Unfortunately dump has changed sue to change in datastructure

---
 src/bondflip.c |  132 +++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 125 insertions(+), 7 deletions(-)

diff --git a/src/bondflip.c b/src/bondflip.c
index 23afbc9..bb6bd33 100644
--- a/src/bondflip.c
+++ b/src/bondflip.c
@@ -12,6 +12,7 @@
 //#include "io.h"
 #include<stdio.h>
 #include<string.h>
+#include "constvol.h"
 
 ts_bool single_bondflip_timestep(ts_vesicle *vesicle, ts_bond *bond, ts_double *rn){
 /*c  Vertex and triangle (lm and lp) indexing for bond flip:
@@ -30,10 +31,14 @@
     ts_vertex *k=bond->vtx2;
     ts_uint nei,neip,neim;
     ts_uint i,j;
-    ts_double oldenergy, delta_energy, dvol=0.0;
+    ts_double oldenergy, delta_energy, dvol=0.0, darea=0.0;
     ts_triangle *lm=NULL,*lp=NULL, *lp1=NULL, *lm2=NULL;
 
     ts_vertex *kp,*km;
+
+    ts_double delta_energy_cv;
+    ts_vertex *constvol_vtx_moved, *constvol_vtx_backup;
+    ts_bool retval;
 
     if(it->neigh_no< 3) return TS_FAIL;
     if(k->neigh_no< 3) return TS_FAIL;
@@ -164,7 +169,11 @@
   oldenergy+=it->xk* it->energy;
   //Neigbours of k, it, km, kp don't change its energy.
 
-	if(vesicle->pswitch == 1){dvol = -lm->volume - lp->volume;}
+	if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch>0){dvol = -lm->volume - lp->volume;}
+    if(vesicle->tape->constareaswitch==2){darea=-lm->area-lp->area;} 
+/*    vesicle_volume(vesicle);
+    fprintf(stderr,"Volume in the beginning=%1.16e\n", vesicle->volume);
+*/
 
 /* fix data structure for flipped bond */
     ts_flip_bond(k,it,km,kp, bond,lm, lp, lm2, lp1);
@@ -178,16 +187,109 @@
   delta_energy+=it->xk* it->energy;
   //Neigbours of k, it, km, kp don't change its energy.
 
-  delta_energy-=oldenergy;
-	if(vesicle->pswitch == 1){
+    delta_energy-=oldenergy;
+	if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch>0){
 		dvol = dvol + lm->volume + lp->volume;
-		delta_energy-= vesicle->pressure*dvol;
+		if(vesicle->pswitch==1) delta_energy-= vesicle->pressure*dvol;
 	}
+    if(vesicle->tape->constareaswitch==2){
+        darea=darea+lm->area+lp->area; 
+/*check whether the dvol is gt than epsvol */
+		if(fabs(vesicle->area+darea-A0)>epsarea){
+			//restore old state.
+			/* restoration procedure copied from few lines below */
+			    for(i=0;i<4;i++){
+			//			fprintf(stderr,"Restoring vtx neigh[%d] with neighbours %d\n",i, orig_vtx[i]->neigh_no );
+				free(orig_vtx[i]->neigh);
+				free(orig_vtx[i]->tristar);
+				free(orig_vtx[i]->bond);
+				free(orig_tria[i]->neigh);
+				memcpy((void *)orig_vtx[i],(void *)bck_vtx[i],sizeof(ts_vertex));
+				memcpy((void *)orig_tria[i],(void *)bck_tria[i],sizeof(ts_triangle));
+			//			fprintf(stderr,"Restored vtx neigh[%d] with neighbours %d\n",i, orig_vtx[i]->neigh_no );
+				/* level 2 pointers are redirected*/
+			    }
+			    memcpy(bond,bck_bond,sizeof(ts_bond));
+			    for(i=0;i<4;i++){
+				free(bck_vtx[i]);
+				free(bck_tria[i]);
+			/*			fprintf(stderr,"Restoring vtx neigh[%d] with neighbours %d =",i, orig_vtx[i]->neigh_no );
+				for(j=0;j<orig_vtx[i]->neigh_no;j++) fprintf(stderr," %d", orig_vtx[i]->neigh[j]->idx);
+				fprintf(stderr,"\n"); */
+			    }
+			    free(bck_bond);
+			    return TS_FAIL;
+
+		}
+    }
+
+
+
+
+	if(vesicle->tape->constvolswitch == 2){
+		/*check whether the dvol is gt than epsvol */
+		if(fabs(vesicle->volume+dvol-V0)>epsvol){
+			//restore old state.
+			/* restoration procedure copied from few lines below */
+			    for(i=0;i<4;i++){
+			//			fprintf(stderr,"Restoring vtx neigh[%d] with neighbours %d\n",i, orig_vtx[i]->neigh_no );
+				free(orig_vtx[i]->neigh);
+				free(orig_vtx[i]->tristar);
+				free(orig_vtx[i]->bond);
+				free(orig_tria[i]->neigh);
+				memcpy((void *)orig_vtx[i],(void *)bck_vtx[i],sizeof(ts_vertex));
+				memcpy((void *)orig_tria[i],(void *)bck_tria[i],sizeof(ts_triangle));
+			//			fprintf(stderr,"Restored vtx neigh[%d] with neighbours %d\n",i, orig_vtx[i]->neigh_no );
+				/* level 2 pointers are redirected*/
+			    }
+			    memcpy(bond,bck_bond,sizeof(ts_bond));
+			    for(i=0;i<4;i++){
+				free(bck_vtx[i]);
+				free(bck_tria[i]);
+			/*			fprintf(stderr,"Restoring vtx neigh[%d] with neighbours %d =",i, orig_vtx[i]->neigh_no );
+				for(j=0;j<orig_vtx[i]->neigh_no;j++) fprintf(stderr," %d", orig_vtx[i]->neigh[j]->idx);
+				fprintf(stderr,"\n"); */
+			    }
+			    free(bck_bond);
+			    return TS_FAIL;
+
+		}
+
+	} else
+    if(vesicle->tape->constvolswitch == 1){
+        retval=constvolume(vesicle, it, -dvol, &delta_energy_cv, &constvol_vtx_moved,&constvol_vtx_backup);
+        if(retval==TS_FAIL){
+/* restoration procedure copied from few lines below */
+            for(i=0;i<4;i++){
+    //			fprintf(stderr,"Restoring vtx neigh[%d] with neighbours %d\n",i, orig_vtx[i]->neigh_no );
+                free(orig_vtx[i]->neigh);
+                free(orig_vtx[i]->tristar);
+                free(orig_vtx[i]->bond);
+                free(orig_tria[i]->neigh);
+                memcpy((void *)orig_vtx[i],(void *)bck_vtx[i],sizeof(ts_vertex));
+                memcpy((void *)orig_tria[i],(void *)bck_tria[i],sizeof(ts_triangle));
+    //			fprintf(stderr,"Restored vtx neigh[%d] with neighbours %d\n",i, orig_vtx[i]->neigh_no );
+                /* level 2 pointers are redirected*/
+            }
+            memcpy(bond,bck_bond,sizeof(ts_bond));
+            for(i=0;i<4;i++){
+                free(bck_vtx[i]);
+                free(bck_tria[i]);
+    /*			fprintf(stderr,"Restoring vtx neigh[%d] with neighbours %d =",i, orig_vtx[i]->neigh_no );
+                for(j=0;j<orig_vtx[i]->neigh_no;j++) fprintf(stderr," %d", orig_vtx[i]->neigh[j]->idx);
+                fprintf(stderr,"\n"); */
+            }
+            free(bck_bond);
+            return TS_FAIL;
+        }
+        delta_energy+=delta_energy_cv;
+    }
+
 
 /* MONTE CARLO */
     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())
@@ -199,6 +301,9 @@
             //not accepted, reverting changes
 	    //restore all backups
 //		fprintf(stderr,"Restoring!!!\n");
+        if(vesicle->tape->constvolswitch == 1){
+            constvolumerestore(constvol_vtx_moved,constvol_vtx_backup);
+        }
 
 		for(i=0;i<4;i++){
 //			fprintf(stderr,"Restoring vtx neigh[%d] with neighbours %d\n",i, orig_vtx[i]->neigh_no );
@@ -222,14 +327,25 @@
 		}
 
 		free(bck_bond);
+
 //		fprintf(stderr,"Restoration complete!!!\n");
+//    vesicle_volume(vesicle);
+//    fprintf(stderr,"Volume after fail=%1.16e\n", vesicle->volume);
 
 		return TS_FAIL;
         }
     }
      /* IF BONDFLIP ACCEPTED, THEN RETURN SUCCESS! */
-  //          fprintf(stderr,"SUCCESS!!!\n");
+//            fprintf(stderr,"SUCCESS!!!\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;
+    }
 	// delete all backups
 	for(i=0;i<4;i++){
 	free(bck_vtx[i]->neigh);
@@ -245,6 +361,8 @@
 	}
 	free(bck_bond);
 
+//    vesicle_volume(vesicle);
+//    fprintf(stderr,"Volume after success=%1.16e\n", vesicle->volume);
     return TS_SUCCESS;
 }
 

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