#include <stdlib.h>
#include "general.h"
#include "vertex.h"
#include "cell.h"
char plugin_name[] = "Pressure";
char plugin_description[]= "Defines extra energy term for relative pressure difference between the inner vesicle and outer vesicle";
char plugin_author[] = "SAMO PENIC";

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;	
}

void vm_energy_before_prepare(ts_vesicle *vesicle, ts_vertex *vtx){
	if(vesicle->pswitch == 1){
		ts_double *dvol=(ts_double *)vesicle->plist->pointer->plugin->details->data;
		ts_uint i;
		*dvol=0;
		for(i=0;i<vtx->tristar_no;i++) *dvol-=vtx->tristar[i]->volume;
	}
}

ts_double vm_energy_after_execute(ts_vesicle *vesicle, ts_vertex *vtx){
	ts_double delta_energy=0;
	if(vesicle->pswitch == 1){
		ts_double *dvol=(ts_double *)vesicle->plist->pointer->plugin->details->data;
		ts_uint i;
		for(i=0;i<vtx->tristar_no;i++) *dvol+=vtx->tristar[i]->volume;
		delta_energy=-vesicle->pressure*(*dvol);
	}
	return delta_energy;
}