From 4df6ed05246cf8bc9fe0cb0c8766ebc368d2f512 Mon Sep 17 00:00:00 2001
From: Samo Penic <samo.penic@gmail.com>
Date: Sat, 09 Mar 2019 19:33:51 +0000
Subject: [PATCH] Added stretching energy plugin

---
 src/plugins/plane_confinement.c |   23 ++++++++++++++++++++++-
 1 files changed, 22 insertions(+), 1 deletions(-)

diff --git a/src/plugins/plane_confinement.c b/src/plugins/plane_confinement.c
index 6cf052c..b290052 100644
--- a/src/plugins/plane_confinement.c
+++ b/src/plugins/plane_confinement.c
@@ -2,6 +2,7 @@
 #include "general.h"
 #include "vertex.h"
 #include "cell.h"
+#include <math.h>
 char plugin_name[] = "Plane confimenent";
 char plugin_description[]= "Confines vesicle between two planes d/2 above z=0 and d/2 below z=0. The plates squeeze vesicle with some predefined force.";
 char plugin_author[] = "SAMO PENIC";
@@ -9,6 +10,7 @@
 ts_plugin_details *init (){
 	ts_plugin_details *details=(ts_plugin_details *)calloc(1,sizeof(ts_plugin_details));
 	details->name = plugin_name;
+//	details->data = (void *)calloc(1,sizeof(ts_double));
 	return details;	
 }
 
@@ -20,7 +22,26 @@
 		return TS_FAIL;
 		}
 	}
-
 	return TS_SUCCESS;
 }
 
+
+ts_double vm_energy_after_execute(ts_vesicle *vesicle, ts_vertex *vtx, ts_vertex *backupvtx){
+// plane confinement energy due to compressing force
+	ts_double delta_energy=0;
+	if(vesicle->tape->plane_confinement_switch){
+		if(vesicle->confinement_plane.force_switch){
+			//substract old energy
+			if(abs(vesicle->tape->plane_d/2.0-vesicle->confinement_plane.z_max)>1e-10) {
+				delta_energy-=vesicle->tape->plane_F / pow(vesicle->confinement_plane.z_max-backupvtx[0].z,2);
+				delta_energy+=vesicle->tape->plane_F / pow(vesicle->confinement_plane.z_max-vtx->z,2);
+			}
+			if(abs(-vesicle->tape->plane_d/2.0-vesicle->confinement_plane.z_min)>1e-10) {
+				delta_energy-=vesicle->tape->plane_F / pow(vesicle->confinement_plane.z_min-backupvtx[0].z,2);
+				delta_energy+=vesicle->tape->plane_F / pow(vesicle->confinement_plane.z_min-vtx->z,2);
+			}
+		}
+	}
+	return delta_energy;
+
+}

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