void Newton<_Type>::iterate(DenseVector<_Type>& x) {
// length of the vector
unsigned N = x.size();
// Jacobian
DenseMatrix<_Type> J(N, N, 0.0);
// NVectors
DenseVector<_Type> oldFn(N, 0.0), newFn(N, 0.0);
// linear system object - native because no LAPACK complex at the moment
DenseLinearSystem<_Type> system(&J, &oldFn, "native");
system.set_monitor_det(MONITOR_DET);
// iteration counter
unsigned itn = 0;
do {
// increment the counter
++itn;
// evaluate the residuals and jacobian at the current state
p_RESIDUAL -> update(x);
// get the residuals
oldFn = p_RESIDUAL -> residual();
#ifdef DEBUG
std::cout << " DEBUG: starting with |Residuals| = " << oldFn.inf_norm() << "\n";
#endif
if((std::abs(oldFn.inf_norm()) < TOL) || (itn == MAX_STEPS)) {
break;
}
// retrieve the current jacobian
J = p_RESIDUAL -> jacobian();
// linear solver
// \todo LU interface to LAPACK for complex matrices
system.solve();
#ifdef DEBUG
std::cout << " DEBUG: Iteration number = " << itn << "\n";
std::cout << " DEBUG: |Newton correction| = " << oldFn.inf_norm() << "\n";
#endif
// must *subtract* delta
x -= oldFn;
} while(true);
// More the 'MAX_STEPS' iterations currently triggers a failure.
if(itn == MAX_STEPS) {
std::string problem;
problem = " The Newton.iterate method took too many iterations. \n";
problem += " At the moment, this is set as a failure. \n";
throw ExceptionItn(problem, itn, oldFn.inf_norm());
}
LAST_DET_SIGN = system.get_det_sign();
if(MONITOR_DET) {
if(system.get_det_sign() * LAST_DET_SIGN < 0) {
std::string problem;
problem = "[ INFO ] : Determinant monitor has changed signs in ODE_BVP.\n";
problem += "[ INFO ] : Bifurcation detected.\n";
throw ExceptionBifurcation(problem);
}
}
}
void ArpFileNameControl::MessageReceived(BMessage* msg)
{
if (msg->WasDropped() || msg->what == B_REFS_RECEIVED) {
BString16 newFn(mFileName);
entry_ref fileRef;
if (msg->FindRef("refs", &fileRef) == B_OK) {
BEntry e(&fileRef);
if (e.InitCheck() == B_OK && e.Exists()) {
BPath p(&e);
if (p.InitCheck() == B_OK) {
newFn = p.Path();
}
}
}
if (newFn != mFileName) {
mFileName = newFn;
/*
BMessenger mg(mTarget);
if (!mg.IsValid()) mg = BMessenger(this);
if (mInvokedMsg && mg.IsValid()) {
*/
Invoke();
/*
BMessage m(*mInvokedMsg);
m.AddString("arp:file name", mFileName);
mg.SendMessage(&m);
}
*/
Invalidate();
}
return;
}
inherited::MessageReceived(msg);
}