From 1bf3c3ad4e8c4f2ce35af71a40c67c6c8ce60ee2 Mon Sep 17 00:00:00 2001
From: Samo Penic <samo.penic@fe.uni-lj.si>
Date: Thu, 11 Sep 2014 12:23:44 +0000
Subject: [PATCH] Tape template beginning.

---
 src/bondflip.c |   37 +++++++++++++++++++++++++++++++++++--
 1 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/src/bondflip.c b/src/bondflip.c
index 3a31a28..4c8b50c 100644
--- a/src/bondflip.c
+++ b/src/bondflip.c
@@ -169,7 +169,7 @@
   oldenergy+=it->xk* it->energy;
   //Neigbours of k, it, km, kp don't change its energy.
 
-	if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch==1){dvol = -lm->volume - lp->volume;}
+	if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch>0){dvol = -lm->volume - lp->volume;}
       
 /*    vesicle_volume(vesicle);
     fprintf(stderr,"Volume in the beginning=%1.16e\n", vesicle->volume);
@@ -188,11 +188,41 @@
   //Neigbours of k, it, km, kp don't change its energy.
 
     delta_energy-=oldenergy;
-	if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch==1){
+	if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch>0){
 		dvol = dvol + lm->volume + lp->volume;
 		if(vesicle->pswitch==1) delta_energy-= vesicle->pressure*dvol;
 	}
 
+	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){
@@ -275,6 +305,9 @@
      /* IF BONDFLIP ACCEPTED, THEN RETURN SUCCESS! */
 //            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);
     }

--
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