Package com.dkt.graphics.elements

Class GPoint

java.lang.Object

com.dkt.graphics.elements.GraphicE

com.dkt.graphics.elements.GPoint

All Implemented Interfaces:

Cloneable

public class GPoint
extends GraphicE

This class represents a mutable point

Author:

Federico Vera <[email protected]>

Field Summary

Fields inherited from class com.dkt.graphics.elements.GraphicE

STROKE

Constructor Summary

Constructors

Constructor	Description
GPoint(int x, int y)	Creates a new GPoint
GPoint(int x, int y, int cs)	Creates a new GPoint with a given cross size
GPoint(GPoint e)	Copy constructor

Method Summary

Modifier and Type	Method	Description
static int	ccw(GPoint a, GPoint b, GPoint c)	Is a->b->c a counterclockwise (levorotary) turn?
GPoint	clone()
double	distance(int x, int y)	Calculates the distance between this point and the one passed as an argument
double	distance(GPoint p)	Calculates the distance between this point and the one passed as an argument
void	draw(Graphics2D g)	Draws the component on the given graphics
boolean	equals(Object obj)
int	hashCode()
void	move(int x, int y)	Moves this point to the given coordinates
String	toString()
void	traslate(int x, int y)	Traslates this element on X and Y
int	x()	Retrieves the X coordinate of this point
int	y()	Retrieves the Y coordinate of this point

Methods inherited from class com.dkt.graphics.elements.GraphicE

getPaint, getStroke, setPaint, setStroke

Methods inherited from class java.lang.Object

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

Constructor Details

GPoint

public GPoint(GPoint e)

Copy constructor

Parameters:

e - GPoint to copy

Throws:

IllegalArgumentException - if e is null

GPoint

public GPoint(int x,
 int y)

Creates a new GPoint

Parameters:

x - The x coordinate of the point

y - The y coordinate of the point

GPoint

public GPoint(int x,
 int y,
 int cs)

Creates a new GPoint with a given cross size

Parameters:

x - The x coordinate of the point

y - The y coordinate of the point

cs - Cross size

Method Details

x

public int x()

Retrieves the X coordinate of this point

Returns:

x coordinate

y

public int y()

Retrieves the Y coordinate of this point

Returns:

y coordinate

distance

public double distance(GPoint p)

Calculates the distance between this point and the one passed as an argument

Parameters:

p - the reference point

Returns:

distance between points

Throws:

IllegalArgumentException - if point is null

distance

public double distance(int x,
 int y)

Calculates the distance between this point and the one passed as an argument

Parameters:

x - the X coordinate of the point

y - the Y coordinate of the point

Returns:

distance between points

ccw

public static int ccw(GPoint a,
 GPoint b,
 GPoint c)

Is a->b->c a counterclockwise (levorotary) turn?

Parameters:

a - first point

b - second point

c - third point

Returns:

{-1, 0, +1} if a->b->c is respectively a clockwise, collinear; counterclockwise turn

draw

public void draw(Graphics2D g)

Description copied from class: GraphicE

Draws the component on the given graphics

Specified by:

draw in class GraphicE

Parameters:

g - where to draw

traslate

public void traslate(int x,
 int y)

Description copied from class: GraphicE

Traslates this element on X and Y

Specified by:

traslate in class GraphicE

Parameters:

x - size in px of the horizontal translation

y - size in px of the vertical translation

move

public void move(int x,
 int y)

Moves this point to the given coordinates

Parameters:

x - new x coordinate

y - new y coordinate

toString

public String toString()

Overrides:

toString in class Object

clone

public GPoint clone()

Specified by:

clone in class GraphicE

hashCode

public int hashCode()

Overrides:

hashCode in class GraphicE

equals

public boolean equals(Object obj)

Overrides:

equals in class GraphicE