private void gameUpdate() {
if (!isPaused && !gameOver) {
if (jack.willHitBrick()) { // collision checking first
jack.stayStill(); // stop jack and scenery
bricksMan.stayStill();
ribsMan.stayStill();
}
ribsMan.update(); // update background and sprites
bricksMan.update();
jack.updateSprite();
fireball.updateSprite();
if (showExplosion) explosionPlayer.updateTick(); // update the animation
}
} // end of gameUpdate()
private void gameRender() {
if (dbImage == null) {
dbImage = createImage(PWIDTH, PHEIGHT);
if (dbImage == null) {
System.out.println("dbImage is null");
return;
} else dbg = dbImage.getGraphics();
}
// draw a white background
dbg.setColor(Color.white);
dbg.fillRect(0, 0, PWIDTH, PHEIGHT);
// draw the game elements: order is important
ribsMan.display(dbg); // the background ribbons
bricksMan.display(dbg); // the bricks
jack.drawSprite(dbg); // the sprites
fireball.drawSprite(dbg);
if (showExplosion) // draw the explosion (in front of jack)
dbg.drawImage(explosionPlayer.getCurrentImage(), xExpl, yExpl, null);
reportStats(dbg);
if (gameOver) gameOverMessage(dbg);
if (showHelp) // draw the help at the very front (if switched on)
dbg.drawImage(
helpIm, (PWIDTH - helpIm.getWidth()) / 2, (PHEIGHT - helpIm.getHeight()) / 2, null);
} // end of gameRender()
private void processKey(KeyEvent e)
// handles termination, help, and game-play keys
{
int keyCode = e.getKeyCode();
// termination keys
// listen for esc, q, end, ctrl-c on the canvas to
// allow a convenient exit from the full screen configuration
if ((keyCode == KeyEvent.VK_ESCAPE)
|| (keyCode == KeyEvent.VK_Q)
|| (keyCode == KeyEvent.VK_END)
|| ((keyCode == KeyEvent.VK_C) && e.isControlDown())) running = false;
// help controls
if (keyCode == KeyEvent.VK_H) {
if (showHelp) { // help being shown
showHelp = false; // switch off
isPaused = false;
} else { // help not being shown
showHelp = true; // show it
isPaused = true; // isPaused may already be true
}
}
// game-play keys
if (!isPaused && !gameOver) {
// move the sprite and ribbons based on the arrow key pressed
if (keyCode == KeyEvent.VK_LEFT) {
jack.moveLeft();
bricksMan.moveRight(); // bricks and ribbons move the other way
ribsMan.moveRight();
} else if (keyCode == KeyEvent.VK_RIGHT) {
jack.moveRight();
bricksMan.moveLeft();
ribsMan.moveLeft();
} else if (keyCode == KeyEvent.VK_UP)
jack.jump(); // jumping has no effect on the bricks/ribbons
else if (keyCode == KeyEvent.VK_DOWN) {
jack.stayStill();
bricksMan.stayStill();
ribsMan.stayStill();
}
}
} // end of processKey()
public JackPanel(JumpingJack jj, long period) {
jackTop = jj;
this.period = period;
setDoubleBuffered(false);
setBackground(Color.white);
setPreferredSize(new Dimension(PWIDTH, PHEIGHT));
setFocusable(true);
requestFocus(); // the JPanel now has focus, so receives key events
addKeyListener(
new KeyAdapter() {
public void keyPressed(KeyEvent e) {
processKey(e);
}
});
// initialise the loaders
ImagesLoader imsLoader = new ImagesLoader(IMS_INFO);
clipsLoader = new ClipsLoader(SNDS_FILE);
// initialise the game entities
bricksMan = new BricksManager(PWIDTH, PHEIGHT, BRICKS_INFO, imsLoader);
int brickMoveSize = bricksMan.getMoveSize();
ribsMan = new RibbonsManager(PWIDTH, PHEIGHT, brickMoveSize, imsLoader);
jack =
new JumperSprite(
PWIDTH,
PHEIGHT,
brickMoveSize,
bricksMan,
imsLoader,
(int) (period / 1000000L)); // in ms
fireball = new FireBallSprite(PWIDTH, PHEIGHT, imsLoader, this, jack);
// prepare the explosion animation
explosionPlayer =
new ImagesPlayer("explosion", (int) (period / 1000000L), 0.5, false, imsLoader);
BufferedImage explosionIm = imsLoader.getImage("explosion");
explWidth = explosionIm.getWidth();
explHeight = explosionIm.getHeight();
explosionPlayer.setWatcher(this); // report animation's end back here
// prepare title/help screen
helpIm = imsLoader.getImage("title");
showHelp = true; // show at start-up
isPaused = true;
// set up message font
msgsFont = new Font("SansSerif", Font.BOLD, 24);
metrics = this.getFontMetrics(msgsFont);
} // end of JackPanel()