A class for encoding/finding symmetries common to the geometry of the projection data and the discretised density. More...

#include "stir/recon_buildblock/DataSymmetriesForDensels.h"

Inheritance diagram for stir::DataSymmetriesForDensels:

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Public Member Functions
virtual DataSymmetriesForDensels *	clone () const =0

bool	operator== (const DataSymmetriesForDensels &) const

bool	operator!= (const DataSymmetriesForDensels &) const

virtual void	get_related_densels (std::vector< Densel > &, const Densel &b) const =0
	fills in a vector with all the Densels that are related to 'b' (including itself) More...

virtual int	num_related_densels (const Densel &b) const
	returns the number of Densels related to 'b' More...

virtual unique_ptr< SymmetryOperation >	find_symmetry_operation_from_basic_densel (Densel &) const =0
	given an arbitrary Densel 'b', find the basic Densel More...

virtual bool	find_basic_densel (Densel &b) const
	given an arbitrary Densel 'b', find the basic Densel More...

Protected Types
typedef DataSymmetriesForDensels	root_type

Protected Member Functions
virtual bool	blindly_equals (const root_type *const) const =0

Detailed Description

A class for encoding/finding symmetries common to the geometry of the projection data and the discretised density.

This class is mainly (only?) useful for ProjMatrixByDensel classes and their 'users'. Together with SymmetryOperation, it provides the basic way to be able to write generic code without knowing which particular symmetries the data have.

Member Function Documentation

◆ get_related_densels()

void stir::DataSymmetriesForDensels::get_related_densels	(	std::vector< Densel > &	rel_b,
		const Densel &	b
	)		const

pure virtual

fills in a vector with all the Densels that are related to 'b' (including itself)

Warning: b has to be a 'basic' Densel

Implemented in stir::DataSymmetriesForDensels_PET_CartesianGrid.

◆ num_related_densels()

int stir::DataSymmetriesForDensels::num_related_densels ( const Densel & b ) const

virtual

returns the number of Densels related to 'b'

default implementation in terms of get_related_densels, will be slow of course

Reimplemented in stir::DataSymmetriesForDensels_PET_CartesianGrid.

◆ find_symmetry_operation_from_basic_densel()

virtual unique_ptr<SymmetryOperation> stir::DataSymmetriesForDensels::find_symmetry_operation_from_basic_densel ( Densel & ) const

pure virtual

given an arbitrary Densel 'b', find the basic Densel

sets 'b' to the corresponding 'basic' Densel and returns the symmetry transformation from 'basic' to 'b'.

Implemented in stir::DataSymmetriesForDensels_PET_CartesianGrid.

◆ find_basic_densel()

bool stir::DataSymmetriesForDensels::find_basic_densel ( Densel & b ) const

virtual

given an arbitrary Densel 'b', find the basic Densel

sets 'b' to the corresponding 'basic' Densel and returns true if 'b' is changed (i.e. it was NOT a basic Densel).

default implementation in terms of find_symmetry_operation_from_basic_densel

Reimplemented in stir::DataSymmetriesForDensels_PET_CartesianGrid.

◆ blindly_equals()

bool stir::DataSymmetriesForDensels::blindly_equals ( const root_type * const ) const

protectedpure virtual

Default implementation always returns true. Needs to be overloaded.

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

/home/sirfuser/devel/STIRdistrib/STIR/src/include/stir/recon_buildblock/DataSymmetriesForDensels.h
/home/sirfuser/devel/STIRdistrib/STIR/src/include/stir/recon_buildblock/DataSymmetriesForDensels.inl
/home/sirfuser/devel/STIRdistrib/STIR/src/recon_buildblock/DataSymmetriesForDensels.cxx

Public Member Functions

Protected Types