|
| TensorFunction (const double initial_time=0.0) |
|
virtual | ~TensorFunction () |
|
virtual value_type | value (const Point< dim > &p) const |
|
virtual void | value_list (const std::vector< Point< dim > > &points, std::vector< value_type > &values) const |
|
virtual gradient_type | gradient (const Point< dim > &p) const |
|
virtual void | gradient_list (const std::vector< Point< dim > > &points, std::vector< gradient_type > &gradients) const |
|
| DeclException0 (ExcPureFunctionCalled) |
|
| DeclException2 (ExcVectorHasWrongSize, int, int,<< "The vector has size "<< arg1<< " but should have "<< arg2<< " elements.") |
|
| FunctionTime (const double initial_time=0.0) |
|
virtual | ~FunctionTime () |
|
double | get_time () const |
|
virtual void | set_time (const double new_time) |
|
virtual void | advance_time (const double delta_t) |
|
| Subscriptor () |
|
| Subscriptor (const Subscriptor &) |
|
virtual | ~Subscriptor () |
|
Subscriptor & | operator= (const Subscriptor &) |
|
void | subscribe (const char *identifier=0) const |
|
void | unsubscribe (const char *identifier=0) const |
|
unsigned int | n_subscriptions () const |
|
void | list_subscribers () const |
|
| DeclException3 (ExcInUse, int, char *, std::string &,<< "Object of class "<< arg2<< " is still used by "<< arg1<< " other objects.\n"<< "(Additional information: "<< arg3<< ")\n"<< "Note the entry in the Frequently Asked Questions of "<< "deal.II (linked to from http://www.dealii.org/) for "<< "more information on what this error means.") |
|
| DeclException2 (ExcNoSubscriber, char *, char *,<< "No subscriber with identifier \""<< arg2<< "\" did subscribe to this object of class "<< arg1) |
|
template<class Archive > |
void | serialize (Archive &ar, const unsigned int version) |
|
template<int rank, int dim>
class TensorFunction< rank, dim >
This class is a model for a tensor valued function. The interface of the class is mostly the same as that for the Function class, with the exception that it does not support vector-valued functions with several components, but that the return type is always tensor-valued. The returned values of the evaluation of objects of this type are always whole tensors, while for the Function
class, one can ask for a specific component only, or use the vector_value
function, which however does not return the value, but rather writes it into the address provided by its second argument. The reason for the different behaviour of the classes is that in the case of tensor valued functions, the size of the argument is known to the compiler a priori, such that the correct amount of memory can be allocated on the stack for the return value; on the other hand, for the vector valued functions, the size is not known to the compiler, so memory has to be allocated on the heap, resulting in relatively expensive copy operations. One can therefore consider this class a specialization of the Function
class for which the size is known. An additional benefit is that tensors of arbitrary rank can be returned, not only vectors, as for them the size can be determined similarly simply.
- Author
- Guido Kanschat, 1999
Definition at line 35 of file function.h.