From 19c1fd84d1fd75e9bfd55feb670fda87a2e02086 Mon Sep 17 00:00:00 2001
From: Samo Penic <samo.penic@gmail.com>
Date: Fri, 08 Feb 2019 08:32:29 +0000
Subject: [PATCH] Merge branch 'master' of ssh://git.penic.eu:29418/trisurf-ng

---
 src/bondflip.c |   66 ++++++++++++++++++++++++++++----
 1 files changed, 57 insertions(+), 9 deletions(-)

diff --git a/src/bondflip.c b/src/bondflip.c
index 4c8b50c..13ec263 100644
--- a/src/bondflip.c
+++ b/src/bondflip.c
@@ -1,3 +1,4 @@
+/* vim: set ts=4 sts=4 sw=4 noet : */
 #include<stdlib.h>
 #include<math.h>
 #include "general.h"
@@ -31,7 +32,7 @@
     ts_vertex *k=bond->vtx2;
     ts_uint nei,neip,neim;
     ts_uint i,j;
-    ts_double oldenergy, delta_energy, dvol=0.0;
+    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;
@@ -167,16 +168,16 @@
   oldenergy+=kp->xk* kp->energy;
   oldenergy+=km->xk* km->energy;
   oldenergy+=it->xk* it->energy;
+  oldenergy+=bond->energy; /* attraction with neighboring vertices, that have spontaneous curvature */
   //Neigbours of k, it, km, kp don't change its energy.
 
 	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);
+    ts_flip_bond(k,it,km,kp, bond,lm, lp, lm2, lp1, vesicle->tape->w);
 
 
 /* Calculating the new energy */
@@ -185,13 +186,53 @@
   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){
 		dvol = dvol + lm->volume + lp->volume;
 		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 */
@@ -298,6 +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;
         }
@@ -305,11 +350,13 @@
      /* IF BONDFLIP ACCEPTED, THEN RETURN SUCCESS! */
 //            fprintf(stderr,"SUCCESS!!!\n");
 
- if(vesicle->tape->constvolswitch == 2){
-	vesicle->volume+=dvol;
-    } else
-    if(vesicle->tape->constvolswitch == 1){
+    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++){
@@ -333,7 +380,7 @@
 
 
 ts_bool ts_flip_bond(ts_vertex *k,ts_vertex *it,ts_vertex *km, ts_vertex *kp,
-ts_bond *bond, ts_triangle *lm, ts_triangle *lp, ts_triangle *lm2, ts_triangle *lp1){
+ts_bond *bond, ts_triangle *lm, ts_triangle *lp, ts_triangle *lm2, ts_triangle *lp1, ts_double w_energy){
 
     ts_uint i; //lmidx, lpidx;
 if(k==NULL || it==NULL || km==NULL || kp==NULL){
@@ -399,6 +446,7 @@
   energy_vertex(kp);
   energy_vertex(km);
   energy_vertex(it);
+  attraction_bond_energy(bond, w_energy);
 // END modifications to data structure!
     return TS_SUCCESS;
 }

--
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