#include <SimpleTesselatedTetraTopologicalMapping.h>

Inheritance diagram for sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping:

Detailed Description

This class, called SimpleTesselatedTetraTopologicalMapping, is a specific implementation of the interface TopologicalMapping where :

INPUT TOPOLOGY = TetrahedronSetTopology OUTPUT TOPOLOGY = TetrahedronSetTopology which is a finer tesselated version of the INPUT TOPOLOGY

Each tetrahedron in the input Topology will be divided in eight tetrahedra in the output topology

Protected Attributes
core::topology::TetrahedronData< sofa::type::vector< sofa::type::fixed_array< Index, 8 > > >	tetrahedraMappedFromTetra
	Each Tetrahedron of the input topology is mapped to the 8 tetrahedrons in which it can be divided. More...

core::topology::TetrahedronData< sofa::type::vector< Index > >	tetraSource
	Which tetra from the input topology map to a given tetra in the output topology (INVALID_INDEX if none) More...

Data< type::vector< Index > >	d_pointMappedFromPoint
	Each point of the input topology is mapped to the same point. More...

Data< type::vector< Index > >	d_pointMappedFromEdge
	Each edge of the input topology is mapped to his midpoint. More...

Data< type::vector< Index > >	d_pointSource
	Which input topology element map to a given point in the output topology : 0 -> none, > 0 -> point index + 1, < 0 , - edge index -1. More...

std::set< Index >	tetrahedraToRemove

Protected Attributes inherited from sofa::core::topology::TopologicalMapping
std::map< Index, Index >	Glob2LocMap

std::map< Index, sofa::type::vector< Index > >	In2OutMap

ElementType	m_inputType = geometry::ElementType::UNKNOWN

ElementType	m_outputType = geometry::ElementType::UNKNOWN

Protected Attributes inherited from sofa::core::objectmodel::BaseObject
SingleLink< BaseObject, BaseContext, BaseLink::FLAG_DOUBLELINK >	l_context

LinkSlaves	l_slaves

SingleLink< BaseObject, BaseObject, BaseLink::FLAG_DOUBLELINK >	l_master

Protected Attributes inherited from sofa::core::objectmodel::Base
std::map< std::string, sofa::core::DataTrackerCallback >	m_internalEngine

VecData	m_vecData
	List of fields (Data instances) More...

MapData	m_aliasData
	name -> Data multi-map (includes names and aliases) More...

VecLink	m_vecLink
	List of links. More...

MapLink	m_aliasLink
	name -> Link multi-map (includes names and aliases) More...

Public Member Functions
	SOFA_CLASS (SimpleTesselatedTetraTopologicalMapping, sofa::core::topology::TopologicalMapping)

void	init () override
	Initializes the target BaseTopology from the source BaseTopology. More...

void	updateTopologicalMappingTopDown () override
	Translates the TopologyChange objects from the source to the target. More...

void	updateTopologicalMappingBottomUp () override
	Translates the TopologyChange objects from the target to the source. More...

bool	propagateFromInputToOutputModel () override
	Return true if this mapping is able to propagate topological changes from input to output model. More...

bool	propagateFromOutputToInputModel () override
	Return true if this mapping is able to propagate topological changes from output to input model. More...

const type::vector< Index > &	getPointMappedFromPoint () const

const type::vector< Index > &	getPointMappedFromEdge () const

const type::vector< Index > &	getPointSource () const

Public Member Functions inherited from sofa::core::topology::TopologicalMapping
	SOFA_ABSTRACT_CLASS (TopologicalMapping, objectmodel::BaseObject)

virtual void	setTopologies (In from, Out to)
	Specify the input and output models. More...

void	setPathInputObject (const std::string &o)
	Set the path to the objects mapped in the scene graph. More...

void	setPathOutputObject (const std::string &o)

In *	getFrom ()
	Accessor to the INPUT topology of the TopologicalMapping : More...

Out *	getTo ()
	Accessor to the OUTPUT topology of the TopologicalMapping : More...

virtual bool	isTheOutputTopologySubdividingTheInputOne ()
	return true if the output topology subdivide the input one. (the topology uses the Loc2GlobVec/Glob2LocMap/In2OutMap structs and share the same DOFs) More...

const std::map< Index, Index > &	getGlob2LocMap ()
	Accessor to index maps : More...

virtual Index	getGlobIndex (Index ind)

virtual Index	getFromIndex (Index ind)

void	dumpGlob2LocMap ()

void	dumpLoc2GlobVec ()

virtual bool	checkTopologies ()
	Method to check the topology mapping maps regarding the upper topology. More...

virtual void	getFromIndex (type::vector< Index > &, const Index) const

const std::map< Index, sofa::type::vector< Index > > &	getIn2OutMap ()

Public Member Functions inherited from sofa::core::objectmodel::BaseObject
	SOFA_CLASS (BaseObject, Base)

virtual void	draw (const core::visual::VisualParams *)
	Render internal data of this object, for debugging purposes. More...

virtual void	computeBBox (const core::ExecParams *, bool=false)

void	setSrc (const std::string &v, std::vector< std::string > *attributeList=nullptr)
	Sets a source Object and parses it to collect dependent Data. More...

void	setSrc (const std::string &v, const BaseObject loader, std::vector< std::string > attributeList=nullptr)

Base *	findLinkDestClass (const BaseClass destType, const std::string &path, const BaseLink link) override

virtual std::string	getPathName () const override
	Return the full path name of this object. More...

virtual bool	insertInNode (BaseNode *)

virtual bool	removeInNode (BaseNode *)

SReal	getTime () const
	Current time. More...

const BaseContext *	getContext () const

BaseContext *	getContext ()

const BaseObject *	getMaster () const

BaseObject *	getMaster ()

const VecSlaves &	getSlaves () const

BaseObject *	getSlave (const std::string &name) const

virtual void	addSlave (BaseObject::SPtr s)

virtual void	removeSlave (BaseObject::SPtr s)

virtual void	handleEvent (Event *)
	Handle an event. More...

virtual void	handleTopologyChange ()

virtual void	handleTopologyChange (core::topology::Topology *t)

void	parse (BaseObjectDescription *arg) override
	Parse the given description to assign values to this object's fields and potentially other parameters. More...

virtual void	bwdInit ()
	Initialization method called at graph creation and modification, during bottom-up traversal. More...

virtual void	reinit ()
	Update method called when variables used in precomputation are modified. More...

void	updateInternal ()
	Update method called when variables (used to compute other internal variables) are modified. More...

virtual void	storeResetState ()
	Save the initial state for later uses in reset() More...

virtual void	reset ()
	Reset to initial state. More...

virtual void	cleanup ()

Public Member Functions inherited from sofa::core::objectmodel::Base
virtual const BaseClass *	getClass () const

void	addDeprecatedAttribute (lifecycle::DeprecatedData *attribute)

void	addUpdateCallback (const std::string &name, std::initializer_list< BaseData * > inputs, std::function< sofa::core::objectmodel::ComponentState(const DataTracker &)> function, std::initializer_list< BaseData * > outputs)

void	addOutputsToCallback (const std::string &name, std::initializer_list< BaseData * > outputs)

const std::string &	getName () const
	Accessor to the object name. More...

void	setName (const std::string &n)
	Set the name of this object. More...

void	setName (const std::string &n, int counter)
	Set the name of this object, adding an integer counter. More...

std::string	getTypeName () const
	Get the type name of this object (i.e. class and template types) More...

virtual std::string	getClassName () const
	Get the class name of this object. More...

virtual std::string	getTemplateName () const final
	Get the template type names (if any) used to instantiate this object. More...

std::string	getNameSpaceName () const
	Get the template type names (if any) used to instantiate this object. More...

void	setDefinitionSourceFileName (const std::string &sourceFileName)
	Set the source filename (where the component is implemented) More...

const std::string &	getDefinitionSourceFileName () const
	Get the source filename (where the component is implemented) More...

void	setDefinitionSourceFilePos (const int)
	Set the source location (where the component is implemented) More...

int	getDefinitionSourceFilePos () const
	Get the source location (where the component is implemented) More...

void	setInstanciationSourceFileName (const std::string &sourceFileName)

const std::string &	getInstanciationSourceFileName () const

void	setInstanciationSourceFilePos (const int)

int	getInstanciationSourceFilePos () const

void	addMessage (const sofa::helper::logging::Message &m) const

size_t	countLoggedMessages (sofa::helper::logging::Message::TypeSet t=sofa::helper::logging::Message::AnyTypes) const

const std::deque< sofa::helper::logging::Message > &	getLoggedMessages () const

const std::string	getLoggedMessagesAsString (sofa::helper::logging::Message::TypeSet t=sofa::helper::logging::Message::AnyTypes) const

void	clearLoggedMessages () const

bool	notMuted () const

const sofa::core::objectmodel::TagSet &	getTags () const
	Represents the subsets the object belongs to. More...

bool	hasTag (Tag t) const
	Return true if the object belong to the given subset. More...

void	addTag (Tag t)
	Add a subset qualification to the object. More...

void	removeTag (Tag t)
	Remove a subset qualification to the object. More...

ComponentState	getComponentState () const

bool	isComponentStateValid () const

virtual bool	parseField (const std::string &attribute, const std::string &value)
	Assign one field value (Data or Link) More...

virtual bool	hasField (const std::string &attribute) const
	Check if a given Data field or Link exists. More...

void	parseFields (const std::list< std::string > &str)
	Assign the field values stored in the given list of name + value pairs of strings. More...

virtual void	parseFields (const std::map< std::string, std::string * > &str)
	Assign the field values stored in the given map of name -> value pairs. More...

void	writeDatas (std::map< std::string, std::string * > &str)
	Write the current field values to the given map of name -> value pairs. More...

void	writeDatas (std::ostream &out, const std::string &separator=" ")

BaseData *	findData (const std::string &name) const

std::vector< BaseData * >	findGlobalField (const std::string &name) const
	Find data fields given a name: several can be found as we look into the alias map. More...

BaseLink *	findLink (const std::string &name) const

std::vector< BaseLink * >	findLinks (const std::string &name) const
	Find link fields given a name: several can be found as we look into the alias map. More...

virtual void	updateLinks (bool logErrors=true)
	Update pointers in case the pointed-to objects have appeared. More...

template<class T >
BaseData::BaseInitData	initData (::sofa::core::objectmodel::Data< T > field, const char name, const char *help, ::sofa::core::objectmodel::BaseData::DataFlags dataflags)
	Helper method used to initialize a data field containing a value of type T. More...

template<class T >
BaseData::BaseInitData	initData (Data< T > field, const char name, const char *help, bool isDisplayed=true, bool isReadOnly=false)
	Helper method used to initialize a data field containing a value of type T. More...

template<class T >
Data< T >::InitData	initData (Data< T > field, const T &value, const char name, const char *help, bool isDisplayed=true, bool isReadOnly=false)
	Helper method used to initialize a data field containing a value of type T. More...

void	addData (BaseData *f, const std::string &name)

void	addData (BaseData *f)

void	removeData (BaseData *f)
	Remove a data field. More...

void	addAlias (BaseData field, const char alias)
	Add an alias to a Data. More...

void	addLink (BaseLink *l)
	Add a link. More...

void	addAlias (BaseLink link, const char alias)
	Add an alias to a Link. More...

const VecData &	getDataFields () const
	Accessor to the vector containing all the fields of this object. More...

const MapData &	getDataAliases () const
	Accessor to the map containing all the aliases of this object. More...

const VecLink &	getLinks () const
	Accessor to the vector containing all the fields of this object. More...

const MapLink &	getLinkAliases () const
	Accessor to the map containing all the aliases of this object. More...

virtual bool	findDataLinkDest (BaseData &ptr, const std::string &path, const BaseLink link)

template<class T >
bool	findLinkDest (T &ptr, const std::string &path, const BaseLink link)

Protected Member Functions
	SimpleTesselatedTetraTopologicalMapping ()
	Constructor. More...

	~SimpleTesselatedTetraTopologicalMapping () override
	Destructor. More...

void	swapOutputPoints (Index i1, Index i2)

void	removeOutputPoints (const sofa::type::vector< Index > &tab)

void	renumberOutputPoints (const sofa::type::vector< Index > &tab)

void	swapOutputTetrahedra (Index i1, Index i2)

void	removeOutputTetrahedra (const sofa::type::vector< Index > &tab)

void	setPointSource (int i, int source)

void	swapInputPoints (Index i1, Index i2)

void	removeInputPoints (const sofa::type::vector< Index > &tab)

void	renumberInputPoints (const sofa::type::vector< Index > &tab)

void	swapInputEdges (Index i1, Index i2)

void	removeInputEdges (const sofa::type::vector< Index > &tab)

void	swapInputTetrahedra (Index i1, Index i2)

void	removeInputTetrahedra (const sofa::type::vector< Index > &tab)

Protected Member Functions inherited from sofa::core::topology::TopologicalMapping
	TopologicalMapping ()

	~TopologicalMapping () override

bool	checkTopologyInputTypes ()

Protected Member Functions inherited from sofa::core::objectmodel::BaseObject
	BaseObject ()

	~BaseObject () override

virtual void	doUpdateInternal ()
	Implementation of the internal update. More...

void	changeContextLink (BaseContext before, BaseContext &after)

void	changeSlavesLink (BaseObject::SPtr ptr, std::size_t, bool add)
	This method insures that slaves objects have master and context links set correctly. More...

void	trackInternalData (const BaseData &data)
	Method called to add the Data to the DataTracker (listing the Data to track) More...

void	cleanTracker ()

bool	hasDataChanged (const BaseData &data)
	Method called to know if a tracked Data has changed. More...

Protected Member Functions inherited from sofa::core::objectmodel::Base
	Base ()

virtual	~Base ()

void	initData0 (BaseData field, BaseData::BaseInitData &res, const char name, const char *help, bool isDisplayed=true, bool isReadOnly=false)
	Helper method used by initData() More...

void	initData0 (BaseData field, BaseData::BaseInitData &res, const char name, const char *help, BaseData::DataFlags dataFlags)
	Helper method used by initData() More...

template<class T >
void	initData0 (Data< T > field, typename Data< T >::InitData &res, const T &value, const char name, const char *help, bool isDisplayed=true, bool isReadOnly=false)
	Helper method used by initData() More...

Additional Inherited Members
Public Attributes inherited from sofa::core::topology::TopologicalMapping
SingleLink< TopologicalMapping, In, BaseLink::FLAG_STOREPATH\|BaseLink::FLAG_STRONGLINK >	fromModel
	Input source BaseTopology. More...

SingleLink< TopologicalMapping, Out, BaseLink::FLAG_STOREPATH\|BaseLink::FLAG_STRONGLINK >	toModel
	Output target BaseTopology. More...

Data< sofa::type::vector< Index > >	Loc2GlobDataVec

Public Attributes inherited from sofa::core::objectmodel::BaseObject
Data< bool >	f_listening
	if true, handle the events, otherwise ignore the events More...

Public Attributes inherited from sofa::core::objectmodel::Base
std::vector< lifecycle::DeprecatedData * >	m_oldAttributes

Data< int >	d_messageLogCount

Data< std::string >	name
	Name of the object. More...

Data< bool >	f_printLog
	if true, emits extra messages at runtime. More...

Data< sofa::core::objectmodel::TagSet >	f_tags
	list of the subsets the objet belongs to More...

Data< sofa::type::BoundingBox >	f_bbox
	this object bounding box More...

Data< sofa::core::objectmodel::ComponentState >	d_componentState
	the object state More...

std::string	m_definitionSourceFileName {""}

int	m_definitionSourceFilePos {-1}

std::string	m_instanciationSourceFileName {""}

int	m_instanciationSourceFilePos {-1}

Static Public Member Functions inherited from sofa::core::topology::TopologicalMapping
template<class T >
static bool	canCreate (T &obj, core::objectmodel::BaseContext context, core::objectmodel::BaseObjectDescription *arg)

template<class T >
static T::SPtr	create (T , core::objectmodel::BaseContext context, core::objectmodel::BaseObjectDescription *arg)

Static Public Member Functions inherited from sofa::core::objectmodel::BaseObject
template<class T >
static bool	canCreate (T , BaseContext , BaseObjectDescription *)
	Pre-construction check method called by ObjectFactory. More...

template<class T >
static T::SPtr	create (T , BaseContext context, BaseObjectDescription *arg)
	Construction method called by ObjectFactory. More...

Static Public Member Functions inherited from sofa::core::objectmodel::Base
static const BaseClass *	GetClass ()

template<class T >
static std::string	shortName (const T ptr=nullptr, BaseObjectDescription =nullptr)

Attribute details

◆ d_pointMappedFromEdge

Data< type::vector<Index> > sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::d_pointMappedFromEdge

protected

Each edge of the input topology is mapped to his midpoint.

◆ d_pointMappedFromPoint

Data< type::vector<Index> > sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::d_pointMappedFromPoint

protected

Each point of the input topology is mapped to the same point.

◆ d_pointSource

Data< type::vector<Index> > sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::d_pointSource

protected

Which input topology element map to a given point in the output topology : 0 -> none, > 0 -> point index + 1, < 0 , - edge index -1.

◆ tetrahedraMappedFromTetra

core::topology::TetrahedronData< sofa::type::vector<sofa::type::fixed_array<Index, 8> > > sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::tetrahedraMappedFromTetra

protected

Each Tetrahedron of the input topology is mapped to the 8 tetrahedrons in which it can be divided.

◆ tetrahedraToRemove

std::set<Index> sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::tetrahedraToRemove

protected

◆ tetraSource

core::topology::TetrahedronData< sofa::type::vector<Index> > sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::tetraSource

protected

Which tetra from the input topology map to a given tetra in the output topology (INVALID_INDEX if none)

Constructor details

◆ SimpleTesselatedTetraTopologicalMapping()

sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::SimpleTesselatedTetraTopologicalMapping ( )

protected

Constructor.

◆ ~SimpleTesselatedTetraTopologicalMapping()

sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::~SimpleTesselatedTetraTopologicalMapping ( )

inlineoverrideprotected

Destructor.

Does nothing.

Function details

◆ getPointMappedFromEdge()

const type::vector<Index>& sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::getPointMappedFromEdge ( ) const

inline

◆ getPointMappedFromPoint()

const type::vector<Index>& sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::getPointMappedFromPoint ( ) const

inline

◆ getPointSource()

const type::vector<Index>& sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::getPointSource ( ) const

inline

◆ init()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::init ( void )

overridevirtual

Initializes the target BaseTopology from the source BaseTopology.

Reimplemented from sofa::core::objectmodel::BaseObject.

◆ propagateFromInputToOutputModel()

bool sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::propagateFromInputToOutputModel ( )

inlineoverridevirtual

Return true if this mapping is able to propagate topological changes from input to output model.

Reimplemented from sofa::core::topology::TopologicalMapping.

◆ propagateFromOutputToInputModel()

bool sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::propagateFromOutputToInputModel ( )

inlineoverridevirtual

Return true if this mapping is able to propagate topological changes from output to input model.

Reimplemented from sofa::core::topology::TopologicalMapping.

◆ removeInputEdges()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::removeInputEdges ( const sofa::type::vector< Index > & tab )

protected

◆ removeInputPoints()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::removeInputPoints ( const sofa::type::vector< Index > & tab )

protected

◆ removeInputTetrahedra()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::removeInputTetrahedra ( const sofa::type::vector< Index > & tab )

protected

◆ removeOutputPoints()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::removeOutputPoints ( const sofa::type::vector< Index > & tab )

protected

◆ removeOutputTetrahedra()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::removeOutputTetrahedra ( const sofa::type::vector< Index > & tab )

protected

◆ renumberInputPoints()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::renumberInputPoints ( const sofa::type::vector< Index > & tab )

protected

◆ renumberOutputPoints()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::renumberOutputPoints ( const sofa::type::vector< Index > & tab )

protected

◆ setPointSource()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::setPointSource	(	int	i,
		int	source
	)

inlineprotected

◆ SOFA_CLASS()

sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::SOFA_CLASS	(	SimpleTesselatedTetraTopologicalMapping	,
		sofa::core::topology::TopologicalMapping
	)

◆ swapInputEdges()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::swapInputEdges	(	Index	i1,
		Index	i2
	)

protected

◆ swapInputPoints()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::swapInputPoints	(	Index	i1,
		Index	i2
	)

protected

◆ swapInputTetrahedra()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::swapInputTetrahedra	(	Index	i1,
		Index	i2
	)

protected

◆ swapOutputPoints()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::swapOutputPoints	(	Index	i1,
		Index	i2
	)

protected

◆ swapOutputTetrahedra()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::swapOutputTetrahedra	(	Index	i1,
		Index	i2
	)

protected

◆ updateTopologicalMappingBottomUp()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::updateTopologicalMappingBottomUp ( )

overridevirtual

Translates the TopologyChange objects from the target to the source.

Translates each of the TopologyChange objects waiting in the source list so that they have a meaning and reflect the effects of the second topology changes on the first topology.

Reimplemented from sofa::core::topology::TopologicalMapping.

◆ updateTopologicalMappingTopDown()

void sofa::component::mapping::linear::SimpleTesselatedTetraTopologicalMapping::updateTopologicalMappingTopDown ( )

overridevirtual

Translates the TopologyChange objects from the source to the target.

Translates each of the TopologyChange objects waiting in the source list so that they have a meaning and reflect the effects of the first topology changes on the second topology.

Implements sofa::core::topology::TopologicalMapping.

Detailed Description

Protected Attributes

Public Member Functions

Protected Member Functions

Additional Inherited Members

Attribute details

◆ d_pointMappedFromEdge

◆ d_pointMappedFromPoint

◆ d_pointSource

◆ tetrahedraMappedFromTetra

◆ tetrahedraToRemove

◆ tetraSource

Constructor details

◆ SimpleTesselatedTetraTopologicalMapping()

◆ ~SimpleTesselatedTetraTopologicalMapping()

Function details

◆ getPointMappedFromEdge()

◆ getPointMappedFromPoint()

◆ getPointSource()

◆ init()

◆ propagateFromInputToOutputModel()

◆ propagateFromOutputToInputModel()

◆ removeInputEdges()

◆ removeInputPoints()

◆ removeInputTetrahedra()

◆ removeOutputPoints()

◆ removeOutputTetrahedra()

◆ renumberInputPoints()

◆ renumberOutputPoints()

◆ setPointSource()

◆ SOFA_CLASS()

◆ swapInputEdges()

◆ swapInputPoints()

◆ swapInputTetrahedra()

◆ swapOutputPoints()

◆ swapOutputTetrahedra()

◆ updateTopologicalMappingBottomUp()

◆ updateTopologicalMappingTopDown()