problem for moving image

it not work when i press the down arrow the move image cross over the rect. i don't want the move image can cross over that.and also how to make the move image when i press enter the move image will going down but do not stop.when the image move to the rect than stop on there

here is my explaination:

http://i104.photobucket.com/albums/m173/finalmilk/jojo.jpg

this game is a sample i like. the black people(image)stand on the floor(REct) than can walk and walk down.

http://www.java.com/en/games/mobile/stickfighterfury.jsp

Message was edited by:

nickgoldgodl

Message was edited by:

nickgoldgodl

nickgoldgodla at 2007-7-12 9:40:01 >

it not work when i press the down arrow the move image cross over the rect.

The StairStep class showed how to locate the stair rects/images according to your image.

i don't want the move image can cross over that.

CollisionTest showed how to do this. See reply 9 in your thread [url=http://forum.java.sun.com/thread.jspa?threadID=5171926]problem for drawimage[/url].

and also how to make the move image when i press enter the move image will going down but do not stop.

I showed how to do key binding and gave a tutorial link about it in reply 1 of your thread [url=http://forum.java.sun.com/thread.jspa?threadID=5171932]problem for Key Listener[/url].

To make it not stop you will have to start a thread or Swing timer to move the rect.

Start the thread/timer in the Action for the key binding.

when the image move to the rect than stop on there

CollisionTest again.

i have other question i try to make the image can't move out of the playscreen

One way to do this was shown in DSController of reply 1 of your thread [url=http://forum.java.sun.com/thread.jspa?threadID=5171811]crwood please come(every one can come too)[/url]. See the checkBoundries method.

crwooda at 2007-7-12 9:40:01 >

the part of stand on the rect :it have problem too(at the move ball () and haveCollision())

public Playscreen(){

String img = "stair.jpg";

fileNames = new String[10];

playbg = new ImageIcon("image/bgimg.jpg");

playerIcon = new ImageIcon("image/player.gif");

setBackground(Color.white);

setOpaque(true);

registerKeys();

setFocusable(true);

for(int f = 0; f < 10; f++){

fileNames[f] = img ;

}

rects = new Rectangle[fileNames.length];

stair = new ImageIcon[fileNames.length];

for(int j = 0; j < rects.length; j++) {

stair[j] = new ImageIcon("Image/" + fileNames[j]);

rects[j] = new Rectangle(stair[j].getIconWidth(), stair[j].getIconHeight());

}

}

protected void paintComponent(Graphics g) {

super.paintComponent(g);

g.drawImage(playbg.getImage(), 0, 0, this);

g.drawImage(playerIcon.getImage(), loc.x, loc.y, this);

if(firstTime) {

setRects();

firstTime = false;

}

for(int j = 0; j < stair.length; j++) {

g.drawImage(stair[j].getImage(), rects[j].x, rects[j].y, this);

}

}

private void setRects() {

Point p;

for(int j = 0; j < rects.length; j++) {

do {

p = getRandomLocationFor(rects[j]);

rects[j].setLocation(p);

} while(!notTouching(j));

}

}

private boolean notTouching(int index) {

for(int j = 0; j < index; j++) {

if(rects[j].intersects(rects[index]))

return false;

}

return true;

}

private Point getRandomLocationFor(Rectangle r) {

Point p = new Point();

p.x = seed.nextInt(getWidth() - r.width );

p.y = seed.nextInt(getHeight() - r.height);

return p;

}

private void checkBoundries() {

int w = this.getWidth();

int h = this.getHeight();

if(loc.x + dx < 0 || loc.x + playerIcon.getWidth() + dx > w)

dx *= -1;

if(loc.y + dy < 0 || loc.y + playerIcon.getHeight() + dy > h)

dy *= -1;

}

private void moveBall(int xInc, int yInc) {

double x = xInc*dx;

double y = yInc*dy;

if(!haveCollision(x, y)) {

x += playerIcon.x;

y += playerIcon.y;

playerIcon.setFrameFromDiagonal(x, y, x+playerIcon.width, y+playerIcon.height);

repaint();

} else {

Toolkit.getDefaultToolkit().beep();

}

}

private boolean haveCollision(double deltaX, double deltaY) {

double x = playerIcon.x + deltaX;

double y = playerIcon.y + deltaY;

return e.intersects(rect[index]);

}

}

Message was edited by:

nickgoldgodl

Message was edited by:

nickgoldgodl

nickgoldgodla at 2007-7-12 9:40:01 >

i want ask what is the getwidth() and getheight of x and y get for?

private void initRect() {

int w = image.getWidth();

int h = image.getHeight();

int x = (getWidth() - w)/2;<========

int y = (getHeight() - h)/2;<=====

rect = new Rectangle(x, y, w, h);

}

and thanks a lots u are right may be i learning too fast .now i will understand first and go to next step.

and i also want to ask what is intersects means?

i can not find it

Is setFrameFromDiagonal() to set a rect for the Shape?

how can i know which object can use that method?

i have fixed the problem of geticonimage.

but i can't know fixed setFrameFromDiagonal()

and e.intersect.

Downstair.java:203: cannot find symbol

symbol : method setFrameFromDiagonal(double,double,double,double)

location: class javax.swing.ImageIcon

playerIcon.setFrameFromDiagonal(x, y, x+playerIcon.getIconWidth(), y

+playerIcon.getIconHeight() );

Message was edited by:

nickgoldgodl

nickgoldgodla at 2007-7-12 9:40:01 >

this my code i have no error but i can not run why?

import java.awt.*;

import java.awt.event.*;

import java.awt.geom.Ellipse2D;

import java.awt.image.BufferedImage;

import javax.swing.*;

import javax.swing.event.*;

import java.util.Random;

public class Downstair {

Playscreen playScreen;

Pseudo pseudo;

JPanel rightPanel;

private JPanel getCenterPanel() {

playScreen = new Playscreen();

pseudo = new Pseudo();

// Layout right panel.

rightPanel = new JPanel(new CardLayout());

rightPanel.add("Menu", getMenuPanel());

rightPanel.add("Game", playScreen);

// Layout center panel.

JPanel centerPanel = new JPanel(new BorderLayout());

centerPanel.add(pseudo,BorderLayout.LINE_START);

centerPanel.add(rightPanel, BorderLayout.CENTER);

return centerPanel;

}

private JPanel getMenuPanel() {

// Create components.

String[] gameMenulist = {"New Game","Abouts","how to play","Options","Exit"};

JList menulist= new JList(gameMenulist);

ListSelectionModel menulistModel = menulist.getSelectionModel();

//menulist setting

menulist.setLayoutOrientation(JList.HORIZONTAL_WRAP);

menulist.setVisibleRowCount(-1);

menulist.setBackground(Color.BLACK);

menulist.setForeground(Color.WHITE);

menulist.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

menulist.addListSelectionListener(new ListListener());

JPanel panel = new JPanel() {

Image bg = new ImageIcon("image/bgimg.jpg").getImage();

protected void paintComponent(Graphics g) {

super.paintComponent(g);

g.drawImage(bg, 0, 0, this);

}

};

panel.setBackground(Color.white);

panel.setOpaque(true); // default value

panel.setLayout(new GridBagLayout());

GridBagConstraints a = new GridBagConstraints();

// The anchor constraint requires a non-zero weight

// constraint in the direction it is going, ie,

// weightx for horizontal values such as EAST,

// WEST, LINE_START, LINE_END.

a.anchor = GridBagConstraints.PAGE_END;

panel.add(menulist, a);

return panel;

}

public static void main(String[] args) {

Downstair app = new Downstair();

JFrame mainframe = new JFrame();

mainframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

mainframe.getContentPane().add(app.getCenterPanel());

mainframe.setSize(600, 600);

mainframe.setVisible(true);

}

private class ListListener implements ListSelectionListener {

public void valueChanged(ListSelectionEvent e) {

if(!e.getValueIsAdjusting()) {

JList list = (JList)e.getSource();

int index = list.getSelectedIndex();

switch(index) {

case 0:

CardLayout cards = (CardLayout)rightPanel.getLayout();

cards.show(rightPanel, "Game");

break;

case 4:

System.exit(0);

break;

default:

System.out.println("unexpected type: " + index);

}

}

}

}

}

class Playscreen extends JPanel {

ImageIcon playbg;

ImageIcon playerIcon;

ImageIcon[] stair;

Point loc = new Point(100,100);

int dx = 3;

int dy = 3;

Rectangle[] rects;

Random seed = new Random();

String[] fileNames;

boolean firstTime = true;

Rectangle playerRect = new Rectangle(playerIcon.getIconWidth(),

playerIcon.getIconHeight());

Rectangle rect;

public Playscreen(){

String img = "stair.jpg";

fileNames = new String[10];

playbg = new ImageIcon("image/bgimg.jpg");

playerIcon = new ImageIcon("image/player.gif");

setBackground(Color.white);

setOpaque(true);

registerKeys();

setFocusable(true);

for(int f = 0; f < 10; f++){

fileNames[f] = img ;

}

rects = new Rectangle[fileNames.length];

stair = new ImageIcon[fileNames.length];

for(int j = 0; j < rects.length; j++) {

stair[j] = new ImageIcon("Image/" + fileNames[j]);

rects[j] = new Rectangle(stair[j].getIconWidth(), stair[j].getIconHeight());

}

}

protected void paintComponent(Graphics g) {

super.paintComponent(g);

g.drawImage(playbg.getImage(), 0, 0, this);

g.drawImage(playerIcon.getImage(), loc.x, loc.y, this);

if(firstTime) {

setRects();

firstTime = false;

}

for(int j = 0; j < stair.length; j++) {

g.drawImage(stair[j].getImage(), rects[j].x, rects[j].y, this);

}

}

private void setRects() {

Point p;

for(int j = 0; j < rects.length; j++) {

do {

p = getRandomLocationFor(rects[j]);

rects[j].setLocation(p);

} while(!notTouching(j));

}

}

private boolean notTouching(int index) {

for(int j = 0; j < index; j++) {

if(rects[j].intersects(rects[index]))

return false;

}

return true;

}

private Point getRandomLocationFor(Rectangle r) {

Point p = new Point();

p.x = seed.nextInt(getWidth() - r.width );

p.y = seed.nextInt(getHeight() - r.height);

return p;

}

private void checkBoundries() {

int w = this.getWidth();// width/height of this component,

int h = this.getHeight(); // the enclosing class, a JPanel

if(loc.x + dx < 0 || loc.x + playerRect.width + dx > w)

dx *= -1;

if(loc.y + dy < 0 || loc.y + playerRect.height + dy > h)

dy *= -1;

}

private void moveBall(int xInc, int yInc) {

double x = xInc*dx;

double y = yInc*dy;

if(!haveCollision(x, y)) {

x += loc.x;

y += loc.y;

playerRect.setFrameFromDiagonal(x, y, x+playerRect.width,

y+playerRect.height);

repaint();

} else {

Toolkit.getDefaultToolkit().beep();

}

}

private boolean haveCollision(double deltaX, double deltaY) {

double x = playerRect.x + deltaX;

double y = playerRect.y + deltaY;

// Loop through your stair rectangles and see if the playerRect

// is intersecting (piercing) any of them. If so you have a

// collision.

for(int j = 0; j < stair.length; j++) {

if(playerRect.intersects(rects[j]))

return true;// collision!

}

return false;

}

private void registerKeys() {

int c = JComponent.WHEN_IN_FOCUSED_WINDOW;

getInputMap(c).put(KeyStroke.getKeyStroke("UP"), "UP");

getActionMap().put("UP", upAction);

getInputMap(c).put(KeyStroke.getKeyStroke("LEFT"), "LEFT");

getActionMap().put("LEFT", leftAction);

getInputMap(c).put(KeyStroke.getKeyStroke("DOWN"), "DOWN");

getActionMap().put("DOWN", downAction);

getInputMap(c).put(KeyStroke.getKeyStroke("RIGHT"), "RIGHT");

getActionMap().put("RIGHT", rightAction);

}

private Action upAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(0, -1);

}

};

private Action leftAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(-1, 0);

}

};

private Action downAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(0, 1);

}

};

private Action rightAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(1, 0);

}

};

}

class Pseudo extends JPanel {

int floornum = 0;

int lifenum = 0;

JLabel floor = new JLabel("Floor" +" "+ floornum);

JLabel life = new JLabel("Life" +" "+ lifenum);

public Pseudo() {

setPreferredSize(new Dimension(100,100));

setBackground(Color.BLACK);

setForeground(Color.WHITE);

add(floor);

add(life);

}

public Dimension getPreferredSize() {

return new Dimension(100,100);

}

}

Exception in thread "main" java.lang.NullPointerException

at Playscreen.<init>(Downstair.java:117)

at Downstair.getCenterPanel(Downstair.java:18)

at Downstair.main(Downstair.java:77)

nickgoldgodla at 2007-7-12 9:40:01 >

now i have no error can run but now it can't not move the image(playerIcon)...

class Playscreen extends JPanel {

ImageIcon playbg;

ImageIcon playerIcon;

ImageIcon[] stair;

Point loc = new Point(100,100);

int dx = 3;

int dy = 3;

Rectangle[] rects;

Random seed = new Random();

String[] fileNames;

boolean firstTime = true;

Rectangle playerRect;

public Playscreen(){

String img = "stair.jpg";

fileNames = new String[10];

playbg = new ImageIcon("image/bgimg.jpg");

playerIcon = new ImageIcon("image/player.gif");

playerRect = new Rectangle(playerIcon.getIconWidth(),playerIcon.getIconHeight());

setBackground(Color.white);

setOpaque(true);

registerKeys();

setFocusable(true);

for(int f = 0; f < 10; f++){

fileNames[f] = img ;

}

rects = new Rectangle[fileNames.length];

stair = new ImageIcon[fileNames.length];

for(int j = 0; j < rects.length; j++) {

stair[j] = new ImageIcon("Image/" + fileNames[j]);

rects[j] = new Rectangle(stair[j].getIconWidth(), stair[j].getIconHeight());

}

}

protected void paintComponent(Graphics g) {

super.paintComponent(g);

g.drawImage(playbg.getImage(), 0, 0, this);

g.drawImage(playerIcon.getImage(), loc.x, loc.y, this);

if(firstTime) {

setRects();

firstTime = false;

}

for(int j = 0; j < stair.length; j++) {

g.drawImage(stair[j].getImage(), rects[j].x, rects[j].y, this);

}

}

private void setRects() {

Point p;

for(int j = 0; j < rects.length; j++) {

do {

p = getRandomLocationFor(rects[j]);

rects[j].setLocation(p);

} while(!notTouching(j));

}

}

private boolean notTouching(int index) {

for(int j = 0; j < index; j++) {

if(rects[j].intersects(rects[index]))

return false;

}

return true;

}

private Point getRandomLocationFor(Rectangle r) {

Point p = new Point();

p.x = seed.nextInt(getWidth() - r.width );

p.y = seed.nextInt(getHeight() - r.height);

return p;

}

private void checkBoundries() {

int w = this.getWidth();// width/height of this component,

int h = this.getHeight(); // the enclosing class, a JPanel

if(loc.x + dx < 0 || loc.x + playerRect.width + dx > w)

dx *= -1;

if(loc.y + dy < 0 || loc.y + playerRect.height + dy > h)

dy *= -1;

}

private void moveBall(int xInc, int yInc) {

double x = xInc*dx;

double y = yInc*dy;

if(!haveCollision(x, y)) {

x += loc.x;

y += loc.y;

playerRect.setFrameFromDiagonal(x, y, x+playerRect.width, y+playerRect.height);

repaint();

} else {

Toolkit.getDefaultToolkit().beep();

}

}

private boolean haveCollision(double deltaX, double deltaY) {

double x = playerRect.x + deltaX;

double y = playerRect.y + deltaY;

// Loop through your stair rectangles and see if the playerRect

// is intersecting (piercing) any of them. If so you have a

// collision.

for(int j = 0; j < rects.length; j++) {

if(playerRect.intersects(rects[j]))

return true;// collision!

}

return false;

}

private void registerKeys() {

int c = JComponent.WHEN_IN_FOCUSED_WINDOW;

getInputMap(c).put(KeyStroke.getKeyStroke("UP"), "UP");

getActionMap().put("UP", upAction);

getInputMap(c).put(KeyStroke.getKeyStroke("LEFT"), "LEFT");

getActionMap().put("LEFT", leftAction);

getInputMap(c).put(KeyStroke.getKeyStroke("DOWN"), "DOWN");

getActionMap().put("DOWN", downAction);

getInputMap(c).put(KeyStroke.getKeyStroke("RIGHT"), "RIGHT");

getActionMap().put("RIGHT", rightAction);

}

private Action upAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(0, -1);

}

};

private Action leftAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(-1, 0);

}

};

private Action downAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(0, 1);

}

};

private Action rightAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(1, 0);

}

};

}

Message was edited by:

nickgoldgodl

nickgoldgodla at 2007-7-12 9:40:01 >

now i have no error can run but now it can't not move the image(playerIcon)...

The playerRect was not being used for the setRects placement tests. Therefore, one or more

stairs could be placed such that they intersected with playerRect. Then the collision test

would prevent any movement. Add plaerRect to the notTouching method tests.

private boolean notTouching(int index) {

if(playerRect.intersects(rects[index])) // add these

return false;// two lines

for(int j = 0; j < index; j++) {

move image can not go out of the panel but when the image stop i press left arror but

it don't not move.

The playerRect was being tested for collisions with the rects array before it was being

"moved" into the new/prospective position. Changed the test for collision.

private boolean haveCollision(double deltaX, double deltaY) {

// Loop through your stair rectangles and see if playerRect,

// moved to the prospective position, is intersecting any of

// them. If so you have a collision.

for(int j = 0; j < rects.length; j++) {

if(rects[j].intersects(x, y, playerRect.width, playerRect.height)) // <****

return true;// collision!

import java.awt.*;

import java.awt.event.*;

import java.awt.image.BufferedImage;

import java.util.Random;

import javax.swing.*;

public class Playscreen2 extends JPanel {

ImageIcon playbg;

ImageIcon playerIcon;

ImageIcon[] stair;

int dx = 3;

int dy = 3;

Rectangle[] rects;

Random seed = new Random();

String[] fileNames;

boolean firstTime = true;

Rectangle playerRect;

public Playscreen2(BufferedImage image){

String img = "stair.jpg";

fileNames = new String[10];

playbg = new ImageIcon("image/bgimg.jpg");

//"../images/owls.jpg");

playerIcon = new ImageIcon("image/player.gif");

//"../images/Bird.gif");

playerRect = new Rectangle(100, 100,

playerIcon.getIconWidth(),

playerIcon.getIconHeight());

setBackground(Color.white);

setOpaque(true);

registerKeys();

setFocusable(true);

for(int f = 0; f < 10; f++){

fileNames[f] = img ;

}

rects = new Rectangle[fileNames.length];

stair = new ImageIcon[fileNames.length];

for(int j = 0; j < rects.length; j++) {

stair[j] = new ImageIcon(image);

rects[j] = new Rectangle(stair[j].getIconWidth(),

stair[j].getIconHeight());

}

}

protected void paintComponent(Graphics g) {

super.paintComponent(g);

g.drawImage(playbg.getImage(), 0, 0, this);

g.drawImage(playerIcon.getImage(), playerRect.x, playerRect.y, this);

if(firstTime) {

setRects();

firstTime = false;

}

for(int j = 0; j < stair.length; j++) {

g.drawImage(stair[j].getImage(), rects[j].x, rects[j].y, this);

}

}

private void setRects() {

Point p;

for(int j = 0; j < rects.length; j++) {

do {

p = getRandomLocationFor(rects[j]);

rects[j].setLocation(p);

} while(!notTouching(j));

}

}

private boolean notTouching(int index) {

if(playerRect.intersects(rects[index]))

return false;

for(int j = 0; j < index; j++) {

if(rects[j].intersects(rects[index]))

return false;

}

return true;

}

private Point getRandomLocationFor(Rectangle r) {

Point p = new Point();

p.x = seed.nextInt(getWidth() - r.width );

p.y = seed.nextInt(getHeight() - r.height);

return p;

}

/*

private void checkBoundries() {

int w = this.getWidth();// width/height of this component,

int h = this.getHeight(); // the enclosing class, a JPanel

if(playerRect.x + dx < 0 || playerRect.x + playerRect.width + dx > w)

dx *= -1;

if(playerRect.y + dy < 0 || playerRect.y + playerRect.height + dy > h)

dy *= -1;

}

*/

private void moveBall(int xInc, int yInc) {

double x = xInc*dx;

double y = yInc*dy;

if(!haveCollision(x, y)) {

x += playerRect.x;

y += playerRect.y;

// Update playerRect.

playerRect.setFrameFromDiagonal(x, y, x+playerRect.width,

y+playerRect.height);

repaint();

} else {

Toolkit.getDefaultToolkit().beep();

}

}

private boolean haveCollision(double deltaX, double deltaY) {

double x = playerRect.x + deltaX;

double y = playerRect.y + deltaY;

// Loop through your stair rectangles and see if playerRect,

// moved to the prospective position, is intersecting any of

// them. If so you have a collision.

for(int j = 0; j < rects.length; j++) {

if(rects[j].intersects(x, y, playerRect.width, playerRect.height))

return true;// collision!

}

return false;

}

private void registerKeys() {

int c = JComponent.WHEN_IN_FOCUSED_WINDOW;

getInputMap(c).put(KeyStroke.getKeyStroke("UP"), "UP");

getActionMap().put("UP", upAction);

getInputMap(c).put(KeyStroke.getKeyStroke("LEFT"), "LEFT");

getActionMap().put("LEFT", leftAction);

getInputMap(c).put(KeyStroke.getKeyStroke("DOWN"), "DOWN");

getActionMap().put("DOWN", downAction);

getInputMap(c).put(KeyStroke.getKeyStroke("RIGHT"), "RIGHT");

getActionMap().put("RIGHT", rightAction);

}

private Action upAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(0, -1);

}

};

private Action leftAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(-1, 0);

}

};

private Action downAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(0, 1);

}

};

private Action rightAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(1, 0);

}

};

public static void main(String[] args) {

int type = BufferedImage.TYPE_INT_RGB;

BufferedImage image = new BufferedImage(85, 15, type);

Graphics2D g2 = image.createGraphics();

g2.setBackground(Color.blue);

g2.clearRect(0,0,86,15);

g2.dispose();

Playscreen2 app = new Playscreen2(image);

JFrame mainframe = new JFrame();

mainframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

mainframe.getContentPane().add(app);

mainframe.setSize(600, 600);

mainframe.setVisible(true);

}

}

crwooda at 2007-7-12 9:40:01 >

here is my code can't move image

class Playscreen extends JPanel {

ImageIcon playbg;

ImageIcon playerIcon;

ImageIcon[] stair;

Point loc = new Point(100,100);

int dx = 3;

int dy = 3;

Rectangle[] rects;

Random seed = new Random();

String[] fileNames;

boolean firstTime = true;

Rectangle playerRect;

public Playscreen(){

String img = "stair.jpg";

fileNames = new String[10];

playbg = new ImageIcon("image/bgimg.jpg");

playerIcon = new ImageIcon("image/player.gif");

playerRect = new Rectangle(playerIcon.getIconWidth(),playerIcon.getIconHeight());

setBackground(Color.white);

setOpaque(true);

registerKeys();

setFocusable(true);

for(int f = 0; f < 10; f++){

fileNames[f] = img ;

}

rects = new Rectangle[fileNames.length];

stair = new ImageIcon[fileNames.length];

for(int j = 0; j < rects.length; j++) {

stair[j] = new ImageIcon("Image/" + fileNames[j]);

rects[j] = new Rectangle(stair[j].getIconWidth(), stair[j].getIconHeight());

}

}

protected void paintComponent(Graphics g) {

super.paintComponent(g);

g.drawImage(playbg.getImage(), 0, 0, this);

g.drawImage(playerIcon.getImage(), loc.x, loc.y, this);

if(firstTime) {

setRects();

firstTime = false;

}

for(int j = 0; j < stair.length; j++) {

g.drawImage(stair[j].getImage(), rects[j].x, rects[j].y, this);

}

}

private void setRects() {

Point p;

for(int j = 0; j < rects.length; j++) {

do {

p = getRandomLocationFor(rects[j]);

rects[j].setLocation(p);

} while(!notTouching(j));

}

}

private boolean notTouching(int index) {

if(playerRect.intersects(rects[index]))

return false;

for(int j = 0; j < index; j++) {

if(rects[j].intersects(rects[index]))

return false;

}

return true;

}

private Point getRandomLocationFor(Rectangle r) {

Point p = new Point();

p.x = seed.nextInt(getWidth() - r.width );

p.y = seed.nextInt(getHeight() - r.height);

return p;

}

private void checkBoundries() {

int w = this.getWidth();// width/height of this component,

int h = this.getHeight(); // the enclosing class, a JPanel

if(loc.x + dx < 0 || loc.x + playerRect.width + dx > w)

dx *= -1;

if(loc.y + dy < 0 || loc.y + playerRect.height + dy > h)

dy *= -1;

}

private void moveBall(int xInc, int yInc) {

double x = xInc*dx;

double y = yInc*dy;

if(!haveCollision(x, y)) {

x += loc.x;

y += loc.y;

playerRect.setFrameFromDiagonal(x, y, x+playerRect.width, y+playerRect.height);

repaint();

} else {

Toolkit.getDefaultToolkit().beep();

}

}

private boolean haveCollision(double deltaX, double deltaY) {

double x = playerRect.x + deltaX;

double y = playerRect.y + deltaY;

// Loop through your stair rectangles and see if the playerRect

// is intersecting (piercing) any of them. If so you have a

// collision.

for(int j = 0; j < rects.length; j++) {

if(playerRect.intersects(rects[j]))

return true;// collision!

}

return false;

}

private void registerKeys() {

int c = JComponent.WHEN_IN_FOCUSED_WINDOW;

getInputMap(c).put(KeyStroke.getKeyStroke("UP"), "UP");

getActionMap().put("UP", upAction);

getInputMap(c).put(KeyStroke.getKeyStroke("LEFT"), "LEFT");

getActionMap().put("LEFT", leftAction);

getInputMap(c).put(KeyStroke.getKeyStroke("DOWN"), "DOWN");

getActionMap().put("DOWN", downAction);

getInputMap(c).put(KeyStroke.getKeyStroke("RIGHT"), "RIGHT");

getActionMap().put("RIGHT", rightAction);

}

private Action upAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(0, -1);

}

};

private Action leftAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(-1, 0);

}

};

private Action downAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(0, 1);

}

};

private Action rightAction = new AbstractAction() {

public void actionPerformed(ActionEvent e) {

moveBall(1, 0);

}

};

}

nickgoldgodla at 2007-7-21 21:07:58 >