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ChanTAUrk4.cpp
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/*************************************************************************/
/********** ChanTAUrk4.cpp *************/
/*************************************************************************/
/**** ****/
/**** Computing method and Init (intialisation) ****/
/**** for the class ChanTAU ****/
/**** ****/
/*************************************************************************/
#include<iostream>
#include "ChanTAU.h"
#include "1stOrderTMRk4.h"
/* ********** Stationary values for the starting voltage ********* */
void ChanTAU::Init(const real dt)
{
if (Mexp){M=InfM( E0-rho );}
if (Hexp){H=InfH( E0-rho );}
}
/* ********** Computation of H and M after RK4 steps ********* */
void ChanTAU::UpdateM( const real dt )
{
if (Mexp) {
//----> Runge Kutta
if(variation){
M = M + Mk1/6 + Mk2/3 + Mk3/3 + Mk4/6 ;
}
// For persitant currents
else{
M=InfM( itsComp->GetV() -rho);
}
}
}
void ChanTAU::UpdateH( const real dt )
{
//----> Runge Kutta
if (Hexp) {
H = H + Hk1/6 + Hk2/3 + Hk3/3 + Hk4/6 ;
}
}
/* ************** For the Runge Kutta intermediate steps *********** */
// ******************** k1
void ChanTAU::UpdateMk1( const real dt )
{
if (Mexp) {
real v = itsComp->GetV();
if(variation){
Mk1 = FirstOrderTMRk4(M, TauM(v-rho), InfM(v-rho), dt );
}
else{ Mk1=InfM(v-rho)-M;
}
}
}
void ChanTAU::UpdateHk1( const real dt )
{
if (Hexp) {
real v = itsComp->GetV();
Hk1 = FirstOrderTMRk4(H, TauH(v-rho), InfH(v-rho), dt);
}
}
// ******************** k2
void ChanTAU::UpdateMk2( const real dt )
{
if (Mexp) {
real u = itsComp->GetV()+ itsComp->Vk1/2;
if(variation){
Mk2 = FirstOrderTMRk4(M+Mk1/2, TauM(u-rho), InfM(u-rho), dt );
}
else{ Mk2=InfM(u-rho)-M;
}
}
}
void ChanTAU::UpdateHk2( const real dt )
{
if (Hexp) {
real u = itsComp->GetV() + itsComp->Vk1/2;
Hk2 = FirstOrderTMRk4(H+Hk1/2, TauH(u-rho), InfH(u-rho), dt );
}
}
// ******************** k3
void ChanTAU::UpdateMk3( const real dt )
{
if (Mexp) {
real u = itsComp->GetV()+ itsComp->Vk2/2;
if(variation){
Mk3 = FirstOrderTMRk4(M+Mk2/2, TauM(u-rho), InfM(u-rho), dt );
}
else{ Mk3=InfM(u-rho)-M;
}
}
}
void ChanTAU::UpdateHk3( const real dt )
{
if (Hexp) {
real u = itsComp->GetV() + itsComp->Vk2/2;
Hk3 = FirstOrderTMRk4(H+Hk2/2, TauH(u-rho), InfH(u-rho), dt );
}
}
//********************* k4
void ChanTAU::UpdateMk4( const real dt )
{
if (Mexp) {
real u = itsComp->GetV()+itsComp->Vk3;
if(variation){
Mk4 = FirstOrderTMRk4(M+Mk3, TauM(u-rho), InfM(u-rho), dt );
}
else{ Mk4=InfM(u-rho)-M;
}
}
}
void ChanTAU::UpdateHk4( const real dt )
{
if (Hexp) {
real u = itsComp->GetV() + itsComp->Vk3;
Hk4 = FirstOrderTMRk4(H+Hk3, TauH(u-rho), InfH(u-rho), dt );
}
}