Method formTangent

SRC/analysis/analysis/DomainDecompositionAnalysis.cpp:316–347

int  
DomainDecompositionAnalysis::formTangent(void)
{
    int result =0;

    Domain *the_Domain = this->getDomainPtr();

    // we check to see if the domain has changed 
    int stamp = the_Domain->hasDomainChanged();
    if (stamp != domainStamp) {
	domainStamp = stamp;
	this->domainChanged();
    }
    
    // if tangFormed == -1 then formTangent has already been
    // called for this state by formResidual() or formTangVectProduct()
    // so we won't be doing it again.

    if (tangFormedCount != -1) {
	result = theIntegrator->formTangent();
	if (result < 0)
	    return result;
	result = theSolver->condenseA(numEqn-numExtEqn);
	if (result < 0)
	    return result;
    }
	
    tangFormed = true;
    tangFormedCount++;
    
    return result;
}