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Point2D Class Reference
[Two-dimensional Ranges and Points]

Two dimensional point or position. More...

#include <vigra/diff2d.hxx>

Inheritance diagram for Point2D:
Diff2D

List of all members.

Public Types

typedef Point2D index_reference
typedef Point2D PixelType
typedef Point2D const * pointer
typedef Point2D const & reference
typedef Point2D value_type

Public Member Functions

index_reference operator() (int const &dx, int const &dy) const
reference operator* () const
Point2Doperator+= (Diff2D const &offset)
Point2D operator- () const
Point2Doperator-= (Diff2D const &offset)
pointer operator-> () const
Point2Doperator= (Diff2D const &v)
index_reference operator[] (Diff2D const &offset) const
 Point2D (Diff2D const &v)
 Point2D (Point2D const &v)
 Point2D (int x, int y)
 Point2D ()
int px () const
int py () const

Detailed Description

Two dimensional point or position.

Specializes Diff2D for the specification of a 2-dimensional point or position, in contrast to an extent (for the latter use Size2D).

    // access an image at a point
    value = image[Point2D(10, 20)];

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


Member Typedef Documentation

typedef Point2D PixelType

The iterator's value type: a coordinate.

Reimplemented from Diff2D.

The iterator's value type: a coordinate.

Reimplemented from Diff2D.

typedef Point2D const& reference

the iterator's reference type (return type of *iter)

Reimplemented from Diff2D.

the iterator's index reference type (return type of iter[diff])

Reimplemented from Diff2D.

typedef Point2D const* pointer

the iterator's pointer type (return type of iter.operator->())

Reimplemented from Diff2D.


Constructor & Destructor Documentation

Point2D (  ) 

Default Constructor. Init point at position (0,0)

Point2D ( int  x,
int  y 
)

Construct point at given position.

Point2D ( Point2D const &  v  ) 

Copy Constructor.

Point2D ( Diff2D const &  v  )  [explicit]

Explicit conversion Constructor.


Member Function Documentation

int px (  )  const

Query the points' x coordinate

int py (  )  const

Query the points' y coordinate

Point2D& operator= ( Diff2D const &  v  ) 

Copy Assigment.

Point2D operator- (  )  const

Unary negation.

Reimplemented from Diff2D.

Point2D& operator+= ( Diff2D const &  offset  ) 

Increase point coordinates by specified offset.

Point2D& operator-= ( Diff2D const &  offset  ) 

Decrease point coordinates by specified offset.

reference operator* (  )  const

Access current point coordinate.

Reimplemented from Diff2D.

index_reference operator() ( int const &  dx,
int const &  dy 
) const

Read point coordinate at an offset.

Reimplemented from Diff2D.

index_reference operator[] ( Diff2D const &  offset  )  const

Read point coordinate at an offset.

pointer operator-> (  )  const

Access current point coordinate.

Reimplemented from Diff2D.


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 1.6.0 (5 Nov 2009)