Method update

SRC/analysis/integrator/Collocation.cpp:334–370

int Collocation::update(const Vector &deltaU)
{
    AnalysisModel *theModel = this->getAnalysisModel();
    if (theModel == 0)  {
        opserr << "WARNING Collocation::update() - no AnalysisModel set\n";
        return -1;
    }
    
    // check domainChanged() has been called, i.e. Ut will not be zero
    if (Ut == 0)  {
        opserr << "WARNING Collocation::update() - domainChange() failed or not called\n";
        return -2;
    }
    
    // check deltaU is of correct size
    if (deltaU.Size() != U->Size())  {
        opserr << "WARNING Collocation::update() - Vectors of incompatible size ";
        opserr << " expecting " << U->Size() << " obtained " << deltaU.Size() << endln;
        return -3;
    }
    
    // determine the response at t+theta*deltaT
    U->addVector(1.0, deltaU, c1);
    
    Udot->addVector(1.0, deltaU, c2);
    
    Udotdot->addVector(1.0, deltaU, c3);
    
    // update the response at the DOFs
    theModel->setResponse(*U, *Udot, *Udotdot);
    if (theModel->updateDomain() < 0)  {
        opserr << "Collocation::update() - failed to update the domain\n";
        return -4;
    }
    
    return 0;
}

const Vector &
Collocation::getVel()