From 25296b31e8e26baea90fe5d3eef952f9e36f5d74 Mon Sep 17 00:00:00 2001
From: Samo Penic <samo.penic@gmail.com>
Date: Sun, 15 May 2016 18:22:19 +0000
Subject: [PATCH] Added a small fix in trisurf

---
 src/vertexmove.c |   69 +++++++++++++++++++++++++++++-----
 1 files changed, 59 insertions(+), 10 deletions(-)

diff --git a/src/vertexmove.c b/src/vertexmove.c
index 36cf993..b065cbb 100644
--- a/src/vertexmove.c
+++ b/src/vertexmove.c
@@ -1,3 +1,4 @@
+/* vim: set ts=4 sts=4 sw=4 noet : */
 #include<stdlib.h>
 #include<math.h>
 #include "general.h"
@@ -20,7 +21,7 @@
     ts_double dist;
     ts_bool retval; 
     ts_uint cellidx; 
-    ts_double delta_energy, delta_energy_cv,oenergy,dvol=0.0;
+    ts_double delta_energy, delta_energy_cv,oenergy,dvol=0.0, darea=0.0;
     ts_double costheta,sintheta,phi,r;
 	//This will hold all the information of vtx and its neighbours
 	ts_vertex backupvtx[20], *constvol_vtx_moved=NULL, *constvol_vtx_backup=NULL;
@@ -41,7 +42,7 @@
 //    	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:
+//random move in a sphere with radius stepsize:
 	r=vesicle->stepsize*rn[0];
 	phi=rn[1]*2*M_PI;
 	costheta=2*rn[2]-1;
@@ -51,12 +52,12 @@
 	vtx->z=vtx->z+r*costheta;
 
 
-    	//distance with neighbours check
+//distance with neighbours check
     for(i=0;i<vtx->neigh_no;i++){
         dist=vtx_distance_sq(vtx,vtx->neigh[i]);
         if(dist<1.0 || dist>vesicle->dmax) {
-		vtx=memcpy((void *)vtx,(void *)&backupvtx[0],sizeof(ts_vertex));
-		return TS_FAIL;
+		    vtx=memcpy((void *)vtx,(void *)&backupvtx[0],sizeof(ts_vertex));
+    		return TS_FAIL;
 		}
     }
 
@@ -87,14 +88,19 @@
     } 
    
  
-    //if all the tests are successful, then energy for vtx and neighbours is calculated
+//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));
 	}
 
-	if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch==1){
+	if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch>0){
 		for(i=0;i<vtx->tristar_no;i++) dvol-=vtx->tristar[i]->volume;
-	};
+	}
+
+    if(vesicle->tape->constareaswitch==2){
+		for(i=0;i<vtx->tristar_no;i++) darea-=vtx->tristar[i]->area;
+    
+    }
 
     delta_energy=0;
     
@@ -113,11 +119,43 @@
         delta_energy+=vtx->neigh[i]->xk*(vtx->neigh[i]->energy-oenergy);
     }
 
-	if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch == 1){
+	if(vesicle->pswitch == 1 || vesicle->tape->constvolswitch >0){
 		for(i=0;i<vtx->tristar_no;i++) dvol+=vtx->tristar[i]->volume;
         if(vesicle->pswitch==1) delta_energy-=vesicle->pressure*dvol;
 	};
 
+    if(vesicle->tape->constareaswitch==2){
+        /* check whether the darea is gt epsarea */
+		for(i=0;i<vtx->tristar_no;i++) darea+=vtx->tristar[i]->area;
+        if(fabs(vesicle->area+darea-A0)>epsarea){
+	        //restore old state.
+ 			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));
+	        	}
+            		for(i=0;i<vtx->tristar_no;i++) triangle_normal_vector(vtx->tristar[i]); 
+            		//fprintf(stderr,"fajlam!\n");
+            		return TS_FAIL;
+		}
+
+
+    }
+
+	if(vesicle->tape->constvolswitch==2){
+		/*check whether the dvol is gt than epsvol */
+			//fprintf(stderr,"DVOL=%1.16e\n",dvol);
+		if(fabs(vesicle->volume+dvol-V0)>epsvol){
+			//restore old state.
+ 			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));
+	        	}
+            		for(i=0;i<vtx->tristar_no;i++) triangle_normal_vector(vtx->tristar[i]); 
+            		//fprintf(stderr,"fajlam!\n");
+            		return TS_FAIL;
+		}
+
+	} else
 //    vesicle_volume(vesicle);
 //    fprintf(stderr,"Volume before=%1.16e\n", vesicle->volume);
    if(vesicle->tape->constvolswitch == 1){
@@ -150,7 +188,7 @@
     //MONTE CARLOOOOOOOO
     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())
@@ -174,6 +212,8 @@
         constvolumerestore(constvol_vtx_moved,constvol_vtx_backup);
     }
 //    fprintf(stderr, "after vtx(x,y,z)=%e,%e,%e\n",constvol_vtx_moved->x, constvol_vtx_moved->y, constvol_vtx_moved->z);
+//    vesicle_volume(vesicle);
+//    fprintf(stderr,"Volume after fail=%1.16e\n", vesicle->volume);
     return TS_FAIL; 
     }
 }
@@ -187,11 +227,20 @@
 		
 	}
 
+    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;
+    }
 //	if(oldcellidx);
     //END MONTE CARLOOOOOOO
+//    vesicle_volume(vesicle);
+//    fprintf(stderr,"Volume after success=%1.16e\n", vesicle->volume);
     return TS_SUCCESS;
 }
 

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