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/bondflip.c |   17 +++++++++++++----
 1 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/src/bondflip.c b/src/bondflip.c
index 66c40f7..8eb6da9 100644
--- a/src/bondflip.c
+++ b/src/bondflip.c
@@ -32,7 +32,7 @@
     ts_vertex *k=bond->vtx2;
     ts_uint nei,neip,neim;
     ts_uint i,j;
-    ts_double oldenergy, delta_energy, dvol=0.0, darea=0.0;
+    ts_double oldenergy=0.0, delta_energy=0.0, dvol=0.0, darea=0.0;
     ts_triangle *lm=NULL,*lp=NULL, *lp1=NULL, *lm2=NULL;
 
     ts_vertex *kp,*km;
@@ -163,7 +163,7 @@
 /* end backup vertex */
 
 /* Save old energy */
-  oldenergy=0;
+  oldenergy=0.0;
   oldenergy+=k->xk* k->energy;
   oldenergy+=kp->xk* kp->energy;
   oldenergy+=km->xk* km->energy;
@@ -176,19 +176,24 @@
 /*    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, vesicle->tape->w);
 
 
 /* Calculating the new energy */
-  delta_energy=0;
+  delta_energy=0.0;
   delta_energy+=k->xk* k->energy;
   delta_energy+=kp->xk* kp->energy;
   delta_energy+=km->xk* km->energy;
   delta_energy+=it->xk* it->energy;
   delta_energy+=bond->energy; /* attraction with neighboring vertices, that have spontaneous curvature */
   //Neigbours of k, it, km, kp don't change its energy.
+	if(vesicle->tape->stretchswitch==1){
+		oldenergy+=lm->energy+lp->energy;
+		stretchenergy(vesicle,lm);
+		stretchenergy(vesicle,lp);
+		delta_energy+=lm->energy+lp->energy;
+	}
 
     delta_energy-=oldenergy;
 	if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch>0){
@@ -334,6 +339,10 @@
 //		fprintf(stderr,"Restoration complete!!!\n");
 //    vesicle_volume(vesicle);
 //    fprintf(stderr,"Volume after fail=%1.16e\n", vesicle->volume);
+	if(vesicle->tape->stretchswitch==1){
+		stretchenergy(vesicle,lm);
+		stretchenergy(vesicle,lp);
+	}
 
 		return TS_FAIL;
         }

--
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