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VectorElementAccessor< ACCESSOR > Class Template Reference

Accessor for one component of a vector. More...

#include <vigra/accessor.hxx>

List of all members.

Public Types

typedef ACCESSOR::component_type value_type

Public Member Functions

template<class ITERATOR >
value_type const & operator() (ITERATOR const &i) const
template<class ITERATOR , class DIFFERENCE >
value_type const & operator() (ITERATOR const &i, DIFFERENCE const &diff) const
template<class V , class ITERATOR , class DIFFERENCE >
void set (V const &value, ITERATOR const &i, DIFFERENCE const &diff) const
template<class V , class ITERATOR >
void set (V const &value, ITERATOR const &i) const
void setIndex (int i)
 VectorElementAccessor (int index, ACCESSOR a=ACCESSOR())

Detailed Description

template<class ACCESSOR>
class vigra::VectorElementAccessor< ACCESSOR >

Accessor for one component of a vector.

This works like VectorComponentAccessor, only the template paramters differ: Here, we need a vector accessor type , wheras VectorComponentAccessor requires a vector type.

Usage:

    vigra::BRGBImage image(w,h);
    
    // init red channel with 255
    initImage(destImageRange(image, 
                             VectorElementAccessor<vigra::BRGBImage::Accessor>(0)),
              255);

#include <vigra/accessor.hxx>
Namespace: vigra

Examples:

boundarytensor.cxx.


Member Typedef Documentation

typedef ACCESSOR::component_type value_type

the value_type


Constructor & Destructor Documentation

VectorElementAccessor ( int  index,
ACCESSOR  a = ACCESSOR() 
)

determine the component to be accessed


Member Function Documentation

value_type const& operator() ( ITERATOR const &  i) const

read the current data item

value_type const& operator() ( ITERATOR const &  i,
DIFFERENCE const &  diff 
) const

read the data item at an offset (can be 1D or 2D or higher order difference).

void set ( V const &  value,
ITERATOR const &  i 
) const

Write the current data item. The type V of the passed in value is automatically converted to value_type. In case of a conversion floating point -> intergral this includes rounding and clipping.

void set ( V const &  value,
ITERATOR const &  i,
DIFFERENCE const &  diff 
) const

Write the data item at an offset (can be 1D or 2D or higher order difference).. The type V of the passed in value is automatically converted to value_type. In case of a conversion floating point -> intergral this includes rounding and clipping.

void setIndex ( int  i)

Reset the index to the given number.


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

© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de)
Heidelberg Collaboratory for Image Processing, University of Heidelberg, Germany

html generated using doxygen and Python
vigra 1.7.0 (Thu Aug 25 2011)