Derived variables constructed from other variables. More...

#include <DerivedVarMgr.h>

Inheritance diagram for VAPoR::DerivedVarMgr:

Public Member Functions
	DerivedVarMgr ()

virtual	~DerivedVarMgr ()

void	AddCoordVar (DerivedCoordVar *cvar)

void	AddDataVar (DerivedDataVar *dvar)

void	RemoveVar (const DerivedVar *var)

DerivedVar *	GetVar (string name) const

bool	HasVar (string name) const

void	AddMesh (const Mesh &m)

Public Member Functions inherited from VAPoR::DC
	DC ()

virtual	~DC ()

virtual int	Initialize (const std::vector< string > &paths, const std::vector< string > &options=std::vector< string >())

virtual bool	GetDimension (string dimname, DC::Dimension &dimension, long ts) const

virtual std::vector< string >	GetDimensionNames () const

virtual std::vector< string >	GetMeshNames () const

virtual bool	GetMesh (string mesh_name, DC::Mesh &mesh) const

virtual bool	GetMeshDimLens (const string &mesh_name, std::vector< size_t > &dims, long ts=-1) const

virtual bool	GetMeshDimNames (const string &mesh_name, std::vector< string > &dimnames) const

virtual bool	GetCoordVarInfo (string varname, DC::CoordVar &cvar) const

virtual bool	GetDataVarInfo (string varname, DC::DataVar &datavar) const

virtual bool	GetAuxVarInfo (string varname, DC::AuxVar &var) const

virtual bool	GetBaseVarInfo (string varname, DC::BaseVar &var) const

virtual std::vector< string >	GetDataVarNames () const

virtual std::vector< string >	GetCoordVarNames () const

virtual std::vector< string >	GetAuxVarNames () const

virtual size_t	GetNumRefLevels (string varname) const

virtual bool	GetAtt (string varname, string attname, vector< double > &values) const

virtual bool	GetAtt (string varname, string attname, vector< long > &values) const

virtual bool	GetAtt (string varname, string attname, string &values) const

virtual std::vector< string >	GetAttNames (string varname) const

virtual XType	GetAttType (string varname, string attname) const

virtual int	GetDimLensAtLevel (string varname, int level, std::vector< size_t > &dims_at_level, std::vector< size_t > &bs_at_level, long ts=-1) const

virtual int	GetDimLens (string varname, std::vector< size_t > &dims, long ts=-1)

virtual string	GetMapProjection () const

virtual int	OpenVariableRead (size_t ts, string varname, int level=0, int lod=0)

virtual int	CloseVariable (int fd)

virtual int	Read (int fd, float *data)

virtual int	Read (int fd, double *data)

virtual int	Read (int fd, int *data)

virtual int	ReadSlice (int fd, float *slice)

virtual int	ReadSlice (int fd, double *slice)

virtual int	ReadSlice (int fd, int *slice)

virtual int	ReadRegion (int fd, const vector< size_t > &min, const vector< size_t > &max, float *region)

virtual int	ReadRegion (int fd, const vector< size_t > &min, const vector< size_t > &max, double *region)

virtual int	ReadRegion (int fd, const vector< size_t > &min, const vector< size_t > &max, int *region)

virtual int	GetVar (string varname, int level, int lod, float *data)

virtual int	GetVar (string varname, int level, int lod, double *data)

virtual int	GetVar (string varname, int level, int lod, int *data)

virtual int	GetVar (size_t ts, string varname, int level, int lod, float *data)

virtual int	GetVar (size_t ts, string varname, int level, int lod, double *data)

virtual int	GetVar (size_t ts, string varname, int level, int lod, int *data)

virtual bool	VariableExists (size_t ts, string varname, int reflevel=0, int lod=0) const

virtual int	GetHyperSliceInfo (string varname, int level, std::vector< size_t > &dims, size_t &nslice, long ts=-1)

virtual std::vector< string >	GetDataVarNames (int ndim) const

virtual bool	GetVarDimensions (string varname, bool spatial, vector< DC::Dimension > &dimensions, long ts) const

virtual bool	GetVarDimLens (string varname, bool spatial, vector< size_t > &dimlens, long ts=-1) const

virtual bool	GetVarDimLens (string varname, vector< size_t > &sdimlens, size_t &time_dimlen, long ts=-1) const

virtual bool	GetVarDimNames (string varname, bool spatial, vector< string > &dimnames) const

virtual bool	GetVarDimNames (string varname, vector< string > &sdimnames, string &time_dimname) const

virtual size_t	GetVarTopologyDim (string varname) const

virtual size_t	GetVarGeometryDim (string varname) const

virtual bool	IsTimeVarying (string varname) const

virtual bool	IsCompressed (string varname) const

virtual int	GetNumTimeSteps (string varname) const

virtual std::vector< size_t >	GetCRatios (string varname) const

virtual bool	IsDataVar (string varname) const

virtual bool	IsCoordVar (string varname) const

virtual bool	IsAuxVar (string varname) const

virtual bool	GetVarCoordVars (string varname, bool spatial, std::vector< string > &coord_vars) const

bool	GetVarConnVars (string varname, string &face_node_var, string &node_face_var, string &face_edge_var, string &face_face_var, string &edge_node_var, string &edge_face_var) const

virtual size_t	GetNumDimensions (string varname) const

std::vector< string >	GetTimeCoordVarNames () const

Public Member Functions inherited from Wasp::MyBase
	MyBase ()

const string &	getClassName () const

Protected Member Functions
virtual int	initialize (const std::vector< string > &paths, const std::vector< string > &options=std::vector< string >())

virtual bool	getDimension (string dimname, DC::Dimension &dimension) const

virtual std::vector< string >	getDimensionNames () const

virtual std::vector< string >	getMeshNames () const

virtual bool	getMesh (string mesh_name, DC::Mesh &mesh) const

virtual bool	getCoordVarInfo (string varname, DC::CoordVar &cvarInfo) const

virtual bool	getDataVarInfo (string varname, DC::DataVar &datavarInfo) const

virtual bool	getAuxVarInfo (string varname, DC::AuxVar &varInfo) const

virtual bool	getBaseVarInfo (string varname, DC::BaseVar &varInfo) const

virtual std::vector< string >	getDataVarNames () const

virtual std::vector< string >	getCoordVarNames () const

virtual std::vector< string >	getAuxVarNames () const

virtual size_t	getNumRefLevels (string varname) const

virtual bool	getAtt (string varname, string attname, vector< double > &values) const

virtual bool	getAtt (string varname, string attname, vector< long > &values) const

virtual bool	getAtt (string varname, string attname, string &values) const

virtual std::vector< string >	getAttNames (string varname) const

virtual XType	getAttType (string varname, string attname) const

virtual int	getDimLensAtLevel (string varname, int level, std::vector< size_t > &dims_at_level, std::vector< size_t > &bs_at_level) const

virtual string	getMapProjection () const

virtual int	openVariableRead (size_t ts, string varname, int level=0, int lod=0)

virtual int	closeVariable (int fd)

virtual int	readRegion (int fd, const vector< size_t > &min, const vector< size_t > &max, double *region)

virtual int	readRegion (int fd, const vector< size_t > &min, const vector< size_t > &max, float *region)

virtual int	readRegion (int fd, const vector< size_t > &min, const vector< size_t > &max, int *region)

virtual bool	variableExists (size_t ts, string varname, int reflevel=0, int lod=0) const

Protected Member Functions inherited from VAPoR::DC
virtual int	initialize (const std::vector< string > &paths, const std::vector< string > &options=std::vector< string >())=0

virtual bool	getDimension (string dimname, DC::Dimension &dimension) const =0

virtual bool	getDimension (string dimname, DC::Dimension &dimension, long ts) const

virtual std::vector< string >	getDimensionNames () const =0

virtual std::vector< string >	getMeshNames () const =0

virtual bool	getMesh (string mesh_name, DC::Mesh &mesh) const =0

virtual bool	getCoordVarInfo (string varname, DC::CoordVar &cvar) const =0

virtual bool	getDataVarInfo (string varname, DC::DataVar &datavar) const =0

virtual bool	getAuxVarInfo (string varname, DC::AuxVar &var) const =0

virtual bool	getBaseVarInfo (string varname, DC::BaseVar &var) const =0

virtual std::vector< string >	getDataVarNames () const =0

virtual std::vector< string >	getCoordVarNames () const =0

virtual std::vector< string >	getAuxVarNames () const =0

virtual size_t	getNumRefLevels (string varname) const =0

virtual bool	getAtt (string varname, string attname, vector< double > &values) const =0

virtual bool	getAtt (string varname, string attname, vector< long > &values) const =0

virtual bool	getAtt (string varname, string attname, string &values) const =0

virtual std::vector< string >	getAttNames (string varname) const =0

virtual XType	getAttType (string varname, string attname) const =0

virtual vector< size_t >	getBlockSize () const

virtual int	getDimLensAtLevel (string varname, int level, std::vector< size_t > &dims_at_level, std::vector< size_t > &bs_at_level) const =0

virtual int	getDimLensAtLevel (string varname, int level, std::vector< size_t > &dims_at_level, std::vector< size_t > &bs_at_level, long ts) const

virtual string	getMapProjection () const =0

virtual int	openVariableRead (size_t ts, string varname, int level=0, int lod=0)=0

virtual int	closeVariable (int fd)=0

virtual int	readRegion (int fd, const vector< size_t > &min, const vector< size_t > &max, float *region)=0

virtual int	readRegion (int fd, const vector< size_t > &min, const vector< size_t > &max, double *region)=0

virtual int	readRegion (int fd, const vector< size_t > &min, const vector< size_t > &max, int *region)=0

virtual bool	variableExists (size_t ts, string varname, int reflevel=0, int lod=0) const =0

Protected Member Functions inherited from Wasp::MyBase
void	SetClassName (const string &name)

Additional Inherited Members
Public Types inherited from VAPoR::DC
enum	XType { INVALID = -1 , FLOAT , DOUBLE , UINT8 , INT8 , INT32 , INT64 , TEXT }
	External storage types for primitive data. More...

Public Types inherited from Wasp::MyBase
typedef void(*	ErrMsgCB_T) (const char *msg, int err_code)

typedef void(*	DiagMsgCB_T) (const char *msg)

Static Public Member Functions inherited from Wasp::MyBase
static void	SetErrMsg (const char *format,...)
	Record a formatted error message.

static void	SetErrMsg (int errcode, const char *format,...)
	Record a formatted error message and an error code.

static const char *	GetErrMsg ()

static void	SetErrCode (int err_code)
	Record an error code.

static int	GetErrCode ()
	Retrieve the current error code.

static void	SetErrMsgCB (ErrMsgCB_T cb)

static ErrMsgCB_T	GetErrMsgCB ()

static void	SetErrMsgFilePtr (FILE *fp)

static const FILE *	SetErrMsgFilePtr ()

static void	SetDiagMsg (const char *format,...)
	Record a formatted diagnostic message.

static const char *	GetDiagMsg ()

static void	SetDiagMsgCB (DiagMsgCB_T cb)

static DiagMsgCB_T	GetDiagMsgCB ()

static void	SetDiagMsgFilePtr (FILE *fp)

static bool	EnableErrMsg (bool enable)

static bool	GetEnableErrMsg ()

Static Public Attributes inherited from Wasp::MyBase
static char *	ErrMsg

static int	ErrCode

static int	ErrMsgSize

static FILE *	ErrMsgFilePtr

static ErrMsgCB_T	ErrMsgCB

static char *	DiagMsg

static int	DiagMsgSize

static FILE *	DiagMsgFilePtr

static DiagMsgCB_T	DiagMsgCB

static bool	Enabled

Protected Attributes inherited from VAPoR::DC
DC::FileTable	_fileTable

Detailed Description

Derived variables constructed from other variables.

Author: John Clyne

Date: January, 2017

Definition at line 20 of file DerivedVarMgr.h.

Constructor & Destructor Documentation

◆ DerivedVarMgr()

VAPoR::DerivedVarMgr::DerivedVarMgr ( )

Class constuctor

◆ ~DerivedVarMgr()

virtual VAPoR::DerivedVarMgr::~DerivedVarMgr ( )

inlinevirtual

Definition at line 26 of file DerivedVarMgr.h.

Member Function Documentation

◆ AddCoordVar()

void VAPoR::DerivedVarMgr::AddCoordVar ( DerivedCoordVar * cvar )

◆ AddDataVar()

void VAPoR::DerivedVarMgr::AddDataVar ( DerivedDataVar * dvar )

◆ AddMesh()

void VAPoR::DerivedVarMgr::AddMesh ( const Mesh & m )

◆ closeVariable()

virtual int VAPoR::DerivedVarMgr::closeVariable ( int fd )

protectedvirtual

Close the currently opened variable

Close the handle for variable opened with OpenVariableRead()

Parameters

[in] fd A valid file descriptor returned by OpenVariableRead()

See also: OpenVariableRead()

Implements VAPoR::DC.

◆ getAtt() [1/3]

virtual bool VAPoR::DerivedVarMgr::getAtt	(	string	varname,
		string	attname,
		string &	values
	)		const

protectedvirtual

Implements VAPoR::DC.

◆ getAtt() [2/3]

virtual bool VAPoR::DerivedVarMgr::getAtt	(	string	varname,
		string	attname,
		vector< double > &	values
	)		const

protectedvirtual

Implements VAPoR::DC.

◆ getAtt() [3/3]

virtual bool VAPoR::DerivedVarMgr::getAtt	(	string	varname,
		string	attname,
		vector< long > &	values
	)		const

protectedvirtual

Implements VAPoR::DC.

◆ getAttNames()

virtual std::vector< string > VAPoR::DerivedVarMgr::getAttNames ( string varname ) const

protectedvirtual

Return a list of available attribute's names

Returns a vector of all attribute names for the variable, varname. If varname is the empty string the names of all of the global attributes are returned. If varname is not defined an empty vector is returned.

Parameters

[in] varname The name of the variable to query, or the empty string if the names of global attributes are desired.

Return values

attnames A vector of returned attribute names

See also: GetAtt()

Implements VAPoR::DC.

◆ getAttType()

virtual XType VAPoR::DerivedVarMgr::getAttType	(	string	varname,
		string	attname
	)		const

protectedvirtual

Return the external data type for an attribute

Returns the external storage type of the named variable attribute.

Parameters

[in]	varname	The name of the variable to query, or the empty string if the names of global attributes are desired.
[in]	name	Name of the attribute.

Return values

If	an attribute named by `name` does not exist, a negative value is returned.

Implements VAPoR::DC.

◆ getAuxVarInfo()

virtual bool VAPoR::DerivedVarMgr::getAuxVarInfo	(	string	varname,
		DC::AuxVar &	varInfo
	)		const

inlineprotectedvirtual

Return metadata about an auxiliary variable

If the variable varname is defined as an auxiliary variable its metadata will be returned in var.

Return values

bool	If the named variable cannot be found false is returned and the values of `var` are undefined.

See also: GetDataVarInfo(), GetCoordVarInfo()

Implements VAPoR::DC.

Definition at line 71 of file DerivedVarMgr.h.

◆ getAuxVarNames()

virtual std::vector< string > VAPoR::DerivedVarMgr::getAuxVarNames ( ) const

inlineprotectedvirtual

Return a list of names for all of the defined Auxiliary variables.

Returns a list of names for all Auxiliary variables defined

See also: DC::AuxVar

Implements VAPoR::DC.

Definition at line 87 of file DerivedVarMgr.h.

◆ getBaseVarInfo()

virtual bool VAPoR::DerivedVarMgr::getBaseVarInfo	(	string	varname,
		DC::BaseVar &	varInfo
	)		const

protectedvirtual

Return metadata about a data or coordinate variable

If the variable varname is defined as either a data or coordinate variable its metadata will be returned in var.

Return values

bool	If the named variable cannot be found false is returned and the values of `var` are undefined.

See also: GetDataVarInfo(), GetCoordVarInfo()

Implements VAPoR::DC.

◆ getCoordVarInfo()

virtual bool VAPoR::DerivedVarMgr::getCoordVarInfo	(	string	varname,
		DC::CoordVar &	cvarInfo
	)		const

protectedvirtual

Return a coordinate variable's definition

Return a reference to a DC::CoordVar object describing the coordinate variable named by varname

Parameters

[in]	varname	A string specifying the name of the coordinate variable.
[out]	coordvar	A CoordVar object containing the definition of the named variable.

Return values

bool	False is returned if the named coordinate variable does not exist, and the contents of `cvar` will be undefined.

Implements VAPoR::DC.

◆ getCoordVarNames()

virtual std::vector< string > VAPoR::DerivedVarMgr::getCoordVarNames ( ) const

protectedvirtual

Return a list of names for all of the defined coordinate variables.

Returns a list of names for all coordinate variables defined

See also: DC::CoordVar

Implements VAPoR::DC.

◆ getDataVarInfo()

virtual bool VAPoR::DerivedVarMgr::getDataVarInfo	(	string	varname,
		DC::DataVar &	datavarInfo
	)		const

protectedvirtual

Return a data variable's definition

Return a reference to a DC::DataVar object describing the data variable named by varname

Parameters

[in]	varname	A string specifying the name of the variable.
[out]	datavar	A DataVar object containing the definition of the named Data variable.

Return values

bool	If the named data variable cannot be found false is returned and the values of `datavar` are undefined.

Implements VAPoR::DC.

◆ getDataVarNames()

virtual std::vector< string > VAPoR::DerivedVarMgr::getDataVarNames ( ) const

protectedvirtual

Return a list of names for all of the defined data variables.

Returns a list of names for all data variables defined

See also: DC::DataVar

Implements VAPoR::DC.

◆ getDimension()

virtual bool VAPoR::DerivedVarMgr::getDimension	(	string	dimname,
		DC::Dimension &	dimension
	)		const

inlineprotectedvirtual

Return a dimensions's definition

This method returns the definition of the dimension named by dimname as a reference to a DC::Dimension object. If dimname is not defined as a dimension then the name of dimension will be the empty string()

Parameters

[in]	dimname	A string specifying the name of the dimension.
[out]	dimension	The returned Dimension object reference

Return values

bool	If the named dimension can not be found false is returned.

Implements VAPoR::DC.

Definition at line 47 of file DerivedVarMgr.h.

◆ getDimensionNames()

virtual std::vector< string > VAPoR::DerivedVarMgr::getDimensionNames ( ) const

inlineprotectedvirtual

Return names of all defined dimensions

This method returns the list of names of all of the dimensions defined in the DC.

Implements VAPoR::DC.

Definition at line 51 of file DerivedVarMgr.h.

◆ getDimLensAtLevel()

virtual int VAPoR::DerivedVarMgr::getDimLensAtLevel	(	string	varname,
		int	level,
		std::vector< size_t > &	dims_at_level,
		std::vector< size_t > &	bs_at_level
	)		const

protectedvirtual

Return a variable's array dimension lengths at a specified refinement level

Compressed variables may have a multi-resolution grid representation. This method returns the variable's ordered array dimension lengths, and block dimensions at the multiresolution refinement level specified by level.

If the variable named by varname is not compressed the variable's native dimensions are returned.

Note: The number of elements in dims_at_level will match that of bs_at_level. If the data are not blocked the value of each element of bs_at_level will be 1.

Parameters

[in]	varname	Data or coordinate variable name.
[in]	level	Specifies a member of a multi-resolution variable's grid hierarchy as described above.
[out]	dims_at_level	An ordered vector containing the variable's dimensions at the specified refinement level
[out]	bs_at_level	An ordered vector containing the variable's block dimensions at the specified refinement level

Return values

status Zero is returned upon success, otherwise -1.

Note: For unstructured grids the number of dimensions may be less than the topological dimension returned by DC::Mesh::GetTopologyDim().

See also: VAPoR::DC, DC::DataVar::GetBS(), DC::GetVarDimLens()

Implements VAPoR::DC.

◆ getMapProjection()

virtual string VAPoR::DerivedVarMgr::getMapProjection ( ) const

inlineprotectedvirtual

Return default Proj4 map projection string.

For georeference data sets that have map projections this method returns the default properly formatted Proj4 projection string for mapping from geographic to cartographic coordinates. If no projection exists, an empty string is returned.

Return values

projstring An empty string if a Proj4 map projection is not available for the named variable, otherwise a properly formatted Proj4 projection string is returned.

Implements VAPoR::DC.

Definition at line 119 of file DerivedVarMgr.h.

◆ getMesh()

virtual bool VAPoR::DerivedVarMgr::getMesh	(	string	mesh_name,
		DC::Mesh &	mesh
	)		const

protectedvirtual

Return a Mesh's definition

This method returns the definition of the mesh named by mesh_name as a reference to a DC::Mesh object.

Parameters

[in]	mesh_name	A string specifying the name of the Mesh.
[out]	mesh	The returned Mesh object reference

Return values

bool	If the named mesh can not be found false is returned.

Implements VAPoR::DC.

◆ getMeshNames()

virtual std::vector< string > VAPoR::DerivedVarMgr::getMeshNames ( ) const

protectedvirtual

Return names of all defined meshes

This method returns the list of names of all of the meshes defined in the DC.

Implements VAPoR::DC.

◆ getNumRefLevels()

virtual size_t VAPoR::DerivedVarMgr::getNumRefLevels ( string varname ) const

protectedvirtual

Return the number of refinement levels for the indicated variable

Compressed variables may have a multi-resolution grid representation. This method returns the number of levels in the hiearchy. A value of one indicates that only the native resolution is available. A value of two indicates that two levels, the native plus the next coarsest are available, and so on.

Parameters

[in] varname Data or coordinate variable name.

Return values

num	If `varname` is unknown one is returned. if `varname` is not compressed (has no multi-resolution representation) one is returned. Otherwise the total number of levels in the multi-resolution hierarchy are returned.

Implements VAPoR::DC.

◆ GetVar()

DerivedVar * VAPoR::DerivedVarMgr::GetVar ( string name ) const

◆ HasVar()

bool VAPoR::DerivedVarMgr::HasVar ( string name ) const

inline

Definition at line 36 of file DerivedVarMgr.h.

◆ initialize()

virtual int VAPoR::DerivedVarMgr::initialize	(	const std::vector< string > &	paths,
		const std::vector< string > &	options = `std::vector< string >()`
	)

protectedvirtual

Initialize the DC class

Prepare a DC for reading. This method prepares the master DC file indicated by path for reading. The method should be called immediately after the constructor, before any other class methods. This method exists only because C++ constructors can not return error codes.

Parameters

[in]	path	Path name of file that contains, or will contain, the DC master file for this data collection
[in]	options	A vector of option pairs (name, value) that may be accepted by the derived class.

Return values

status A negative int is returned on failure

Implements VAPoR::DC.

◆ openVariableRead()

virtual int VAPoR::DerivedVarMgr::openVariableRead	(	size_t	ts,
		string	varname,
		int	level = `0`,
		int	lod = `0`
	)

protectedvirtual

Open the named variable for reading

This method prepares a data or coordinate variable, indicated by a variable name and time step pair, for subsequent read operations by methods of this class. The value of the refinement levels parameter, level, indicates the resolution of the volume in the multiresolution hierarchy as described by GetDimLensAtLevel().

The level-of-detail parameter, lod, selects the approximation level. Valid values for lod are integers in the range 0..n-1, where n is returned by DC::BaseVar::GetCRatios().size(), or the value -1 may be used to select the best approximation available.

An error occurs, indicated by a negative return value, if the volume identified by the {varname, timestep, level, lod} tupple is not available. Note the availability of a volume can be tested with the VariableExists() method.

Parameters

[in]	ts	Time step of the variable to read. This is the integer offset into the variable's temporal dimension. If the variable does not have a temporal dimension `ts` is ignored.
[in]	varname	Name of the variable to read
[in]	level	Refinement level of the variable. Ignored if the variable is not compressed.
[in]	lod	Approximation level of the variable. A value of -1 indicates the maximum approximation level defined for the DC. Ignored if the variable is not compressed.

Return values

status Returns a non-negative file descriptor on success

See also: GetNumRefLevels(), DC::BaseVar::GetCRatios(), OpenVariableRead()

Implements VAPoR::DC.

◆ readRegion() [1/3]

virtual int VAPoR::DerivedVarMgr::readRegion	(	int	fd,
		const vector< size_t > &	min,
		const vector< size_t > &	max,
		double *	region
	)

protectedvirtual

Read in and return a subregion from the currently opened variable

This method reads and returns a subset of variable data. The min and max vectors, whose dimensions must match the spatial rank of the currently opened variable, identify the minimum and maximum extents, in grid coordinates, of the subregion of interest. The minimum and maximum valid values of an element of min or max are 0 and n-1, respectively, where n is the length of the associated dimension at the opened refinement level.

The region returned is stored in the memory region pointed to by region. It is the caller's responsbility to ensure adequate space is available.

Parameters

[in]	fd	A valid file descriptor returned by OpenVariableRead()
[in]	min	Minimum region extents in grid coordinates
[in]	max	Maximum region extents in grid coordinates
[out]	region	The requested volume subregion

Return values

status Returns a non-negative value on success

See also: OpenVariableRead(), GetDimLensAtLevel(), GetDimensionNames()

Implements VAPoR::DC.

◆ readRegion() [2/3]

virtual int VAPoR::DerivedVarMgr::readRegion	(	int	fd,
		const vector< size_t > &	min,
		const vector< size_t > &	max,
		float *	region
	)

protectedvirtual

Read in and return a subregion from the currently opened variable

This method reads and returns a subset of variable data. The min and max vectors, whose dimensions must match the spatial rank of the currently opened variable, identify the minimum and maximum extents, in grid coordinates, of the subregion of interest. The minimum and maximum valid values of an element of min or max are 0 and n-1, respectively, where n is the length of the associated dimension at the opened refinement level.

The region returned is stored in the memory region pointed to by region. It is the caller's responsbility to ensure adequate space is available.

Parameters

[in]	fd	A valid file descriptor returned by OpenVariableRead()
[in]	min	Minimum region extents in grid coordinates
[in]	max	Maximum region extents in grid coordinates
[out]	region	The requested volume subregion

Return values

status Returns a non-negative value on success

See also: OpenVariableRead(), GetDimLensAtLevel(), GetDimensionNames()

Implements VAPoR::DC.

◆ readRegion() [3/3]

virtual int VAPoR::DerivedVarMgr::readRegion	(	int	fd,
		const vector< size_t > &	min,
		const vector< size_t > &	max,
		int *	region
	)

inlineprotectedvirtual

Implements VAPoR::DC.

Definition at line 133 of file DerivedVarMgr.h.

◆ RemoveVar()

void VAPoR::DerivedVarMgr::RemoveVar ( const DerivedVar * var )

◆ variableExists()

virtual bool VAPoR::DerivedVarMgr::variableExists	(	size_t	ts,
		string	varname,
		int	reflevel = `0`,
		int	lod = `0`
	)		const

protectedvirtual

Returns true if indicated data volume is available

Returns true if the variable identified by the timestep, variable name, refinement level, and level-of-detail is present in the data set. Returns false if the variable is not available.

Parameters

[in]	ts	A valid time step between 0 and GetNumTimesteps()-1
[in]	varname	A valid variable name
[in]	reflevel	Refinement level requested.
[in]	lod	Compression level of detail requested. refinement level contained in the DC.

Implements VAPoR::DC.

The documentation for this class was generated from the following file:

/Users/pearse/VAPOR/include/vapor/DerivedVarMgr.h

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ DerivedVarMgr()

◆ ~DerivedVarMgr()

Member Function Documentation

◆ AddCoordVar()

◆ AddDataVar()

◆ AddMesh()

◆ closeVariable()

◆ getAtt() [1/3]

◆ getAtt() [2/3]

◆ getAtt() [3/3]

◆ getAttNames()

◆ getAttType()

◆ getAuxVarInfo()

◆ getAuxVarNames()

◆ getBaseVarInfo()

◆ getCoordVarInfo()

◆ getCoordVarNames()

◆ getDataVarInfo()

◆ getDataVarNames()

◆ getDimension()

◆ getDimensionNames()

◆ getDimLensAtLevel()

◆ getMapProjection()

◆ getMesh()

◆ getMeshNames()

◆ getNumRefLevels()

◆ GetVar()

◆ HasVar()

◆ initialize()

◆ openVariableRead()

◆ readRegion() [1/3]

◆ readRegion() [2/3]

◆ readRegion() [3/3]

◆ RemoveVar()

◆ variableExists()