de.nidanet.dev.fun.winter.snow
Class Flake

java.lang.Object
  de.nidanet.dev.fun.winter.snow.Flake

All Implemented Interfaces:

Runnable

public class Flake
extends Object
implements Runnable

Objects of this class move over the screen like snow flakes! Each runs as a single thread until it is placed at "a point of no return". See run() method for more information.

Since:

2009-12-19

Version:

1.0

Author:

Nico Danneberg (mail@danneberg.de)

Field Summary

private boolean[][]	FixPoints An array with all fixed points at the screen.
private Graphics	Graph A reference to the screen.
private Snow	Parent A reference to the displaying object.
static long	serialVersionUID Unique Id of this class.
private long	tts Time-To-Sleep between the single falling steps.
private int	x Current x-position of this flake.
private int	y Current y-position of this flake.

Constructor Summary

Flake(Snow p, int x, long t)
Creates and initializes a new flake at position (x;0).

Method Summary

void	addFixPoint(int a, int b) Adds a new fixed point to the local array.
int	getX() Reads the x-position.
int	getY() Reads the y-position.
void	run() Let the flake move over the screen.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

serialVersionUID

public static final long serialVersionUID

Unique Id of this class.

See Also:

Constant Field Values

Parent

private Snow Parent

A reference to the displaying object.

Graph

private Graphics Graph

A reference to the screen.

FixPoints

private boolean[][] FixPoints

An array with all fixed points at the screen.

x

private int x

Current x-position of this flake.

y

private int y

Current y-position of this flake.

tts

private long tts

Time-To-Sleep between the single falling steps. See run().

Constructor Detail

Flake

public Flake(Snow p,
             int x,
             long t)

Creates and initializes a new flake at position (x;0). This does not start any displaying or falling process!

Parameters:

p - the parent object's reference

x - the x-position

t - the Time-To-Sleep

Method Detail

run

public void run()

Let the flake move over the screen. Therefore the flakes moves in a loop one single pixel down per step. If there is a fix point at the new y-position a left or right move is chosen randomly. If both directions are also used by fixed points the current point becomes an additional fixed point itself and the flake stops falling.

Specified by:

run in interface Runnable

addFixPoint

public void addFixPoint(int a,
                        int b)

Adds a new fixed point to the local array.

Parameters:

a - the x-position of the new fixed point

b - the y-position of the new fixed point

getX

public int getX()

Reads the x-position.

Returns:

the value of x

getY

public int getY()

Reads the y-position.

Returns:

the value of y