uk.ac.ed.ph.signal
Class Grid2d

java.lang.Object
  javax.vecmath.Tuple2d
      javax.vecmath.Point2d
          uk.ac.ed.ph.signal.Grid2d

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

Image

public class Grid2d
extends javax.vecmath.Point2d

Class to implement a two dimensional regular grid used access Images using continuous variables.

See Also:

Serialized Form

Field Summary

protected int	height
protected int	width

Fields inherited from class javax.vecmath.Tuple2d

x, y

Constructor Summary

Grid2d()
Default constructor, of width and height 0, and sample interval 1.0

Grid2d(Grid2d g)
Conststructor to setup a grid being the copy of the specified grid

Grid2d(int width, int height)
Constructor to setup Grid2d with sample interval of 1.0 and centre at 0,0

Grid2d(int width, int height, double delta)
Constructor to setup Grid2d with specfied grid

Grid2d(int width, int height, double dx, double dy)
Constructor to setup Grid2d with specified sample interval

Method Summary

Grid2d	clone() Method to return a clone of the current grid
javax.vecmath.Point2d	getCentre() Method to get the centre (actually the super class)
double	getDeltaX() Get the x sample internal
double	getDeltaY() Get the y sample internal
int	getHeight() Method to get the height
javax.vecmath.Point2d	getPoint(int i, int j) Method to get the real (double), location of a pixel located at i,j taking into account the centre and sampling intervals
javax.vecmath.Point2d	getPoint(javax.vecmath.Point2i p) Method to get the real (double), location of a pixel located at i,j taking into account the centre and sampling intervals
javax.vecmath.Point2i	getSample(javax.vecmath.Point2d p) Method to get the pixel location closest to the point specifed by x,y talking into account the centre and sampling internal.
javax.vecmath.Point2d	getSamplePoint(javax.vecmath.Point2d p) Method to get the scaled sample location at as Point2d
int	getWidth() Method to get the width
double	getXCentre() Method to get the x location of the centre
double	getXRange() get the horizontal range
double	getYCentre() Method to get the y location of the centre
double	getYRange() get the vertical range
void	setCentre(double x, double y) Method to set the centre
void	setCentre(javax.vecmath.Point2d c) Method to set the centre
void	setHeight(int h) Method to set the height
void	setRange(double range) Method to set the sample interval by specifing the the range of the grid
void	setRange(double xRange, double yRange) Method to set the sample interval by specifing the the range of the grid
void	setSampleGrid(double delta) Method to set the sample grid with one parameter
void	setSampleGrid(double dx, double dy) Method to set the sample grid
void	setWidth(int w) Method to set the width

Methods inherited from class javax.vecmath.Point2d

distance, distanceL1, distanceLinf, distanceSquared

Methods inherited from class javax.vecmath.Tuple2d

absolute, absolute, add, add, clamp, clamp, clampMax, clampMax, clampMin, clampMin, epsilonEquals, equals, equals, get, getX, getY, hashCode, interpolate, interpolate, negate, negate, scale, scale, scaleAdd, scaleAdd, set, set, set, set, setX, setY, sub, sub, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

width

protected int width

height

protected int height

Constructor Detail

Grid2d

public Grid2d()

Default constructor, of width and height 0, and sample interval 1.0

Grid2d

public Grid2d(int width,
              int height)

Constructor to setup Grid2d with sample interval of 1.0 and centre at 0,0

Parameters:

width - the width in pixels

height - the height in pixels

Grid2d

public Grid2d(int width,
              int height,
              double delta)

Constructor to setup Grid2d with specfied grid

Parameters:

width - the width in pixels

height - the height in pixels

delta - the sample grid in both x and y directions

Grid2d

public Grid2d(int width,
              int height,
              double dx,
              double dy)

Constructor to setup Grid2d with specified sample interval

Parameters:

width - the width of the grid

height - the height of the grid

dx - x sample interval

dy - y sample internal

Grid2d

public Grid2d(Grid2d g)

Conststructor to setup a grid being the copy of the specified grid

Parameters:

g - the specifing Grid2d

Method Detail

clone

public Grid2d clone()

Method to return a clone of the current grid

Overrides:

clone in class javax.vecmath.Tuple2d

Returns:

Grid2d clone of current Grid2d.

setWidth

public void setWidth(int w)

Method to set the width

Parameters:

w - the width in pixels

setHeight

public void setHeight(int h)

Method to set the height

Parameters:

h - the height in pixels

setSampleGrid

public void setSampleGrid(double dx,
                          double dy)

Method to set the sample grid

Parameters:

dx - x sample interval

dy - y sample interval

setSampleGrid

public void setSampleGrid(double delta)

Method to set the sample grid with one parameter

Parameters:

delta - x and y sample interval

setCentre

public void setCentre(double x,
                      double y)

Method to set the centre

Parameters:

x - the x location

y - the y location.

getCentre

public javax.vecmath.Point2d getCentre()

Method to get the centre (actually the super class)

Returns:

Point2d the centre

setCentre

public void setCentre(javax.vecmath.Point2d c)

Method to set the centre

Parameters:

c - the centre

getXCentre

public double getXCentre()

Method to get the x location of the centre

Returns:

double x location of the centre

getYCentre

public double getYCentre()

Method to get the y location of the centre

Returns:

double y location of the centre

getWidth

public int getWidth()

Method to get the width

Returns:

int the width of the sample grid

getHeight

public int getHeight()

Method to get the height

Returns:

int the height of the sample grid

getDeltaX

public double getDeltaX()

Get the x sample internal

getDeltaY

public double getDeltaY()

Get the y sample internal

setRange

public void setRange(double xRange,
                     double yRange)

Method to set the sample interval by specifing the the range of the grid

Parameters:

xRange - the x range

yRange - the y range

setRange

public void setRange(double range)

Method to set the sample interval by specifing the the range of the grid

Parameters:

range - the range in both x and y directions

getXRange

public double getXRange()

get the horizontal range

Returns:

double the horizontal range

getYRange

public double getYRange()

get the vertical range

Returns:

double the vertical range

getPoint

public javax.vecmath.Point2d getPoint(int i,
                                      int j)

Method to get the real (double), location of a pixel located at i,j taking into account the centre and sampling intervals

Parameters:

i - hozizontal pixel location

j - versical pixel location

Returns:

Point2d the location

getPoint

public javax.vecmath.Point2d getPoint(javax.vecmath.Point2i p)

Method to get the real (double), location of a pixel located at i,j taking into account the centre and sampling intervals

Parameters:

p - the pixel location

Returns:

Point2d the location

getSample

public javax.vecmath.Point2i getSample(javax.vecmath.Point2d p)

Method to get the pixel location closest to the point specifed by x,y talking into account the centre and sampling internal. If outside grid, will be set to invalid

Parameters:

p - the point

y - the y location

Returns:

Point2i the pixel location

getSamplePoint

public javax.vecmath.Point2d getSamplePoint(javax.vecmath.Point2d p)

Method to get the scaled sample location at as Point2d