lsst::afw::image::imageLocator Class Reference

An ImageBase locator. More...

Classes
struct	xy_x_iterator
	An x_iterator created from an xy_locator More...
struct	xy_y_iterator
	An y_iterator created from an xy_locator More...

Public Types
typedef void	cached_location_t
	type to store relative location for efficient repeated access (not really void) More...

Public Member Functions
Image::Pixel &	operator* ()
	Dereference a locator, returning a reference to a Pixel. More...
Image::Pixel &	operator() (int x, int y)
	Dereference a pixel offset by (x, y) from the current locator, returning a reference to a Pixel. More...
xy_x_iterator	x ()
	Return an x_iterator that can move an xy_locator More...
xy_y_iterator	y ()
	Return an y_iterator that can move an xy_locator More...
cached_location_t	cache_location (int x, int y)
	Store a relative location for faster repeated access. More...
Image::Pixel &	operator[] (cached_location_t const &)
	Dereference a cached_location_t, returning a reference to a Pixel. More...

Detailed Description

An ImageBase locator.

Definition at line 56 of file iterators.cc.

Member Typedef Documentation

cached_location_t

typedef void lsst::afw::image::imageLocator::cached_location_t

type to store relative location for efficient repeated access (not really void)

Definition at line 59 of file iterators.cc.

Member Function Documentation

cache_location()

cached_location_t lsst::afw::image::imageLocator::cache_location	(	int	x,
		int	y
	)

Store a relative location for faster repeated access.

operator()()

Image::Pixel& lsst::afw::image::imageLocator::operator()	(	int	x,
		int	y
	)

Dereference a pixel offset by (x, y) from the current locator, returning a reference to a Pixel.

As a locator ptr is moved through the image, expressions such as ptr(-1, -1) can be used to examine or set neighbouring pixels

operator*()

Image::Pixel& lsst::afw::image::imageLocator::operator*

(

)

Dereference a locator, returning a reference to a Pixel.

operator[]()

Image::Pixel& lsst::afw::image::imageLocator::operator[]

(

cached_location_t const &

)

Dereference a cached_location_t, returning a reference to a Pixel.

x()

xy_x_iterator lsst::afw::image::imageLocator::x

(

)

Return an x_iterator that can move an xy_locator

y()

xy_y_iterator lsst::afw::image::imageLocator::y

(

)

Return an y_iterator that can move an xy_locator

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

• /j/snowflake/release/lsstsw/stack/Linux64/afw/19.0.0-4-ga671dab3b+1/doc/iterators.cc