gsExprEvaluator< T > Class Template Reference

Detailed Description

template<class T>
class gismo::gsExprEvaluator< T >

Generic evaluator of isogeometric expressions.

The expressions may be scalar ot vector-valued. Computed quatities can be global or element.wise.

Note the following will not return correct result (return value is a reference): gsInfo << "Eval:"<< ev.eval(a) + ev.eval(b) <<"\n"; Use the evaluator once at a time.

Collaboration diagram for gsExprEvaluator< T >:

Public Member Functions
gsAsConstVector< T >	allValues () const
	Returns a vector containing the last computed values per element.
gsAsConstMatrix< T >	allValues (index_t nR, index_t nC) const
	Returns the last computed values per element, resized as a matrix.
void	calcRoot (const index_t p)
	Calculates the p-th root of the lastly computed quantities (eg. integrals)
void	calcSqrt ()
	Calculates the square root of the lastly computed quantities (eg. integrals)
const std::vector< T > &	elementwise () const
	Returns an std::vector containing the last computed values per element.
template<class E >
void	eval (const expr::_expr< E > &expr, gsGridIterator< T, mode, d > &git, const index_t patchInd=0)
template<class E >
gsAsConstMatrix< T >	eval (const expr::_expr< E > &testExpr, const gsVector< T > &pt, const index_t patchInd=0)
element	getElement ()
	Returns a handle to an isogeometric element.
geometryMap	getMap (const gsMultiPatch< T > &mp)
	Registers mp as an isogeometric geometry map and return a handle to it.
geometryMap	getMap (const gsFunctionSet< T > &gm)
	Registers g as an isogeometric geometry map and return a handle to it.
variable	getVariable (const gsFunctionSet< T > &func, index_t dim=1)
	Registers func as a variable and returns a handle to it.
expr::gsComposition< T >	getVariable (const gsFunctionSet< T > &func, geometryMap G)
	Registers func as a variable defined on G and returns a handle to it.
template<class E >
T	integral (const expr::_expr< E > &expr)
	Calculates the integral of the expression expr on the whole integration domain.
template<class E >
T	integralBdr (const expr::_expr< E > &expr)
template<class E >
T	integralBdr (const expr::_expr< E > &expr, const bContainer &bdrlist)
template<class E >
T	integralBdrBc (const bcRefList &BCs, const expr::_expr< E > &expr)
template<class E >
T	integralElWise (const expr::_expr< E > &expr)
	Calculates the integral of the expression expr on each element.
template<class E >
T	integralInterface (const expr::_expr< E > &expr)
template<class E >
T	integralInterface (const expr::_expr< E > &expr, const intContainer &iFaces)
template<class E >
T	max (const expr::_expr< E > &expr)
template<class E >
T	maxElWise (const expr::_expr< E > &expr)
template<class E >
T	maxInterface (const expr::_expr< E > &expr)
template<class E >
T	maxInterface (const expr::_expr< E > &expr, const intContainer &iFaces)
template<class E >
T	min (const expr::_expr< E > &expr)
template<class E >
T	minElWise (const expr::_expr< E > &expr)
template<class E >
T	minInterface (const expr::_expr< E > &expr)
template<class E >
T	minInterface (const expr::_expr< E > &expr, const intContainer &iFaces)
size_t	nValues () const
	The number of lastly computed values.
void	setIntegrationElements (const gsMultiBasis< T > &mesh)
	Sets the domain of integration. More...
template<class E >
void	testEval (const expr::_expr< E > &expr, const gsVector< T > &pt, const index_t patchInd=0)
T	value () const
	Returns the last computed value.
template<class E >
void	writeParaview (const expr::_expr< E > &expr, geometryMap G, std::string const &fn)
	Creates a paraview file named fn containing valies of the. More...
template<class E >
void	writeParaview (const expr::_expr< E > &expr, std::string const &fn)
	Creates a paraview file named fn containing valies of the. More...

Private Member Functions
template<class E , class _op >
T	computeBdr_impl (const expr::_expr< E > &expr, const bContainer &bdrlist)

Member Function Documentation

T computeBdr_impl ( const expr::_expr< E > &  expr, const bContainer &  bdrlist  )

private

! not multipatch!

void eval	(	const expr::_expr< E > &	expr,
		gsGridIterator< T, mode, d > &	git,
		const index_t	patchInd = 0
	)

Computes values of the expression expr at the grid points git of patch patchId

gsAsConstMatrix<T> eval	(	const expr::_expr< E > &	testExpr,
		const gsVector< T > &	pt,
		const index_t	patchInd = 0
	)

Computes value of the expression testExpr at the point pt of patch patchId

T integralBdr ( const expr::_expr< E > &  expr )

inline

Calculates the integral of the expression expr on the boundary of the integration domain

T integralBdr ( const expr::_expr< E > &  expr, const bContainer &  bdrlist  )

inline

Calculates the integral of the expression expr on the boundaries contained in bdrlist

T integralBdrBc ( const bcRefList &  BCs, const expr::_expr< E > &  expr  )

inline

Calculates the integral of the expression expr on the boundaries contained in BCs taking into account boundary functions

T integralInterface ( const expr::_expr< E > &  expr )

inline

Calculates the integral of the expression expr on the interfaces of the (multi-basis) integration domain

T integralInterface ( const expr::_expr< E > &  expr, const intContainer &  iFaces  )

inline

Calculates the integral of the expression expr on the interfaces iFaces of the integration domain

T max ( const expr::_expr< E > &  expr )

inline

Calculates the maximum value of the expression expr by sampling over a finite number of points

T maxElWise ( const expr::_expr< E > &  expr )

inline

Calculates the maximum value of the expression expr by on each element by sampling over a finite number of points

T maxInterface ( const expr::_expr< E > &  expr )

inline

Calculates the maximum of the expression expr on the interfaces of the (multi-basis) integration domain

T maxInterface ( const expr::_expr< E > &  expr, const intContainer &  iFaces  )

inline

Calculates the maximum of the expression expr on the interfaces of the (multi-basis) integration domain

T min ( const expr::_expr< E > &  expr )

inline

Calculates the minimum value of the expression expr by sampling over a finite number of points

T minElWise ( const expr::_expr< E > &  expr )

inline

Calculates the minimum value of the expression expr on each element by sampling over a finite number of points

T minInterface ( const expr::_expr< E > &  expr )

inline

Calculates the minimum of the expression expr on the interfaces of the (multi-basis) integration domain

T minInterface ( const expr::_expr< E > &  expr, const intContainer &  iFaces  )

inline

Calculates the minimum of the expression expr on the interfaces of the (multi-basis) integration domain

void setIntegrationElements ( const gsMultiBasis< T > &  mesh )

inline

Sets the domain of integration.

Warning

Must be called before any computation is requested

void testEval ( const expr::_expr< E > &  expr, const gsVector< T > &  pt, const index_t  patchInd = 0  )

inline

Computes value of the expression expr at the point pt of patch patchId, and displays the result

void writeParaview ( const expr::_expr< E > &  expr, geometryMap  G, std::string const &  fn  )

inline

Creates a paraview file named fn containing valies of the.

Plotting properties are controlled by entries in the options

void writeParaview ( const expr::_expr< E > &  expr, std::string const &  fn  )

inline

Creates a paraview file named fn containing valies of the.

Plotting properties are controlled by entires in the options