bool setDefaultInitialConditionFromNominalValues(
const Thyra::ModelEvaluator<Scalar>& model,
const Ptr<StepperBase<Scalar> >& stepper
)
{
typedef ScalarTraits<Scalar> ST;
typedef Thyra::ModelEvaluatorBase MEB;
if (isInitialized(*stepper))
return false; // Already has an initial condition
MEB::InArgs<Scalar> initCond = model.getNominalValues();
if (!is_null(initCond.get_x())) {
// IC has x, we will assume that initCont.get_t() is the valid start time.
// Therefore, we just need to check that x_dot is also set or we will
// create a zero x_dot
#ifdef RYTHMOS_DEBUG
THYRA_ASSERT_VEC_SPACES( "setInitialConditionIfExists(...)",
*model.get_x_space(), *initCond.get_x()->space() );
#endif
if (initCond.supports(MEB::IN_ARG_x_dot)) {
if (is_null(initCond.get_x_dot())) {
const RCP<Thyra::VectorBase<Scalar> > x_dot =
createMember(model.get_x_space());
assign(x_dot.ptr(), ST::zero());
}
else {
#ifdef RYTHMOS_DEBUG
THYRA_ASSERT_VEC_SPACES( "setInitialConditionIfExists(...)",
*model.get_x_space(), *initCond.get_x_dot()->space() );
#endif
}
}
stepper->setInitialCondition(initCond);
return true;
}
// The model has not nominal values for which to set the initial
// conditions so wo don't do anything! The stepper will still have not
return false;
}
