private GObject checkCorner(double x, double y) {
GObject obj = getElementAt(x, y); // check the corner for GObject
if (obj == paddle) {
vy = -Math.abs(vy);
PrecisionPaddle();
} else if (obj != null && obj != lifeCount) { // check if the ball hits a brick
remove(obj);
vy = -1.05 * vy;
vx = 1.05 * vx;
brickCount--;
AudioClip bounceClip = MediaTools.loadAudioClip("bounce.au");
bounceClip.play();
}
return obj;
}
public class Breakout extends GraphicsProgram {
/** Width and height of application window in pixels */
public static final int APPLICATION_WIDTH = 400;
public static final int APPLICATION_HEIGHT = 600;
/** Dimensions of game board (usually the same) */
private static final int WIDTH = APPLICATION_WIDTH;
private static final int HEIGHT = APPLICATION_HEIGHT;
/** Dimensions of the paddle */
private static final int PADDLE_WIDTH = 60;
private static final int PADDLE_HEIGHT = 10;
/** Offset of the paddle up from the bottom */
private static final int PADDLE_Y_OFFSET = 30;
/** Number of bricks per row */
private static final int NBRICKS_PER_ROW = 10;
/** Number of rows of bricks */
private static final int NBRICK_ROWS = 10;
/** Separation between bricks */
private static final int BRICK_SEP = 4;
/** Width of a brick */
private static final int BRICK_WIDTH =
(WIDTH - (NBRICKS_PER_ROW - 1) * BRICK_SEP) / NBRICKS_PER_ROW;
/** Height of a brick */
private static final int BRICK_HEIGHT = 8;
/** Radius of the ball in pixels */
private static final int BALL_RADIUS = 10;
/** Offset of the top brick row from the top */
private static final int BRICK_Y_OFFSET = 70;
/** Number of turns */
private int endtrying = 0;
/* Method: init() */
/** Sets up the Breakout program. */
public void init() {
addMouseListeners();
}
/* Method: run() */
/** Runs the Breakout program. */
public void run() {
buildBricks();
paddle();
ball();
startApp();
}
// Creating bricks as requested in colors and separators
private void buildBricks() {
for (int x = 0; x < NBRICK_ROWS; x++) {
for (int j = 0; j < NBRICKS_PER_ROW; j++) {
reak = new GRect(BRICK_WIDTH, BRICK_HEIGHT);
reak.setFilled(true);
reakCounter++;
// adding bricks from the start of the line and increasing by j the width and separator
add(reak, +(BRICK_SEP + BRICK_WIDTH) * j, BRICK_Y_OFFSET + (BRICK_SEP + BRICK_HEIGHT) * x);
// Setting color to the bricks depending on brick row number
switch (x) {
case 0:
case 1:
reak.setColor(Color.red);
break;
case 2:
case 3:
reak.setColor(Color.orange);
break;
case 4:
case 5:
reak.setColor(Color.yellow);
break;
case 6:
case 7:
reak.setColor(Color.green);
break;
case 8:
case 9:
reak.setColor(Color.cyan);
break;
}
}
}
}
// Creating Paddle
private void paddle() {
// declaring variables for more clarity and to be used in other method
baddleY = getHeight() - PADDLE_Y_OFFSET - PADDLE_HEIGHT;
baddleX = (WIDTH - PADDLE_WIDTH) / 2;
// creating the paddle
baddle = new GRect(PADDLE_WIDTH, PADDLE_HEIGHT);
baddle.setFilled(true);
add(baddle, baddleX, baddleY);
}
public void mouseMoved(MouseEvent e) {
// tracking the mouse inside the window and ignoring it if it's out of
// window perspective, which is requested in assignment handout.
// mouse is almost in the middle of the paddle.
// height remains the same all time
if ((e.getX() < WIDTH - PADDLE_WIDTH / 2) && (e.getX() > PADDLE_WIDTH / 2)) {
baddle.setLocation(e.getX() - PADDLE_WIDTH / 2, baddleY);
}
}
// Creating the ball above the paddle :D
private void ball() {
ballY = (HEIGHT - BALL_RADIUS) / 2;
ball = new GOval(BALL_RADIUS, BALL_RADIUS);
ball.setFilled(true);
add(ball, (WIDTH - BALL_RADIUS) / 2, ballY);
}
public void startApp() {
waitForClick();
getVelocity();
while (true) {
moveBall();
// delay time, reduced as the player is about to end the game to increases it's difficult
pause(delay + reakCounter / 25);
if (reakCounter == 0) {
GLabel win = new GLabel("YOU WIN!!");
add(win, (getWidth() - win.getWidth()) / 2, HEIGHT / 2);
}
}
}
private void moveBall() {
ball.move(vx, vy);
/*
* top side reflection
*/
if (ball.getY() - ball.getHeight() / 2 < 0) {
vy = -vy;
}
/*
* sides reflect
*/
else if (ball.getX() > WIDTH - ball.getHeight() || ball.getX() - ball.getHeight() / 2 < 0) {
vx = -vx;
}
/*
* ending game if ball goes beyond the paddle, with 3 tries
* and restarting it b4 the 3 tries
*/
else if (ball.getY() > HEIGHT) {
endtrying++;
if (endtrying >= 3) {
removeAll();
GLabel end = new GLabel("YOU LOST!!");
add(end, (getWidth() - end.getWidth()) / 2, getHeight() / 2);
}
// restart part
else {
removeAll();
run();
}
}
// getting what's on sides of the ball, and starting to handle it
GObject row = collectSides();
if (row == baddle) {
/*
* to test Y coordinates for ball and paddle
* println( baddle.getY()+ "|" + ball.getY());
* turned out to be that there's 19 pixel between ball.y and paddle.y; fixing that with if
*/
if (ball.getY() > baddle.getY() - BALL_RADIUS) {
vy = -vy;
bounceClip.play();
/*
* glue issue fix, move the ball above the paddle, so that it doesn't reverse again
*/
if (row == baddle) {
ball.move(0, -PADDLE_HEIGHT);
}
}
}
/* here removing object which is brick, then subtracting the counter, also checking if
* bricks ended so it display final message "YOY WIN"
*/
else if (row != null) {
remove(row);
reakCounter--;
vy = -vy;
}
}
// setting speed and randomness, though i'm not satisfied with it's randomness
// but it's doing the job for now
private void getVelocity() {
vy = 3.0;
vx = rgen.nextDouble(1.0, 3.0);
if (rgen.nextBoolean(0.5)) {
vx = -vx;
}
}
/* getting what's on the sides of our ball
* changing x, y because we've a ball, not the midpoint.
*/
private GObject collectSides() {
GObject obj = getElementAt(ball.getX(), ball.getY());
GObject obj2 = getElementAt(ball.getX() + 2 * BALL_RADIUS, ball.getY());
GObject obj3 = getElementAt(ball.getX(), ball.getY() + 2 * BALL_RADIUS);
GObject obj4 = getElementAt(ball.getX() + 2 * BALL_RADIUS, ball.getY() + 2 * BALL_RADIUS);
if (obj != null) {
return obj;
} else if (obj2 != null) {
return obj2;
} else if (obj3 != null) {
return obj3;
} else if (obj4 != null) {
return obj4;
} else {
return null;
}
}
// private instances
private static int reakCounter = 0;
private static double delay = 7.5;
// Velocity
private static double vx, vy;
private static GRect reak;
private static GRect baddle;
private static GOval ball;
private static double ballY;
private static double baddleY;
private static double baddleX;
// creating random instance
private RandomGenerator rgen = RandomGenerator.getInstance();
// adding sound
AudioClip bounceClip = MediaTools.loadAudioClip("bounce.au");
}
public class BouncingBall extends GraphicsProgram {
/** Size (diameter) of the ball */
private static final int DIAM_BALL = 30;
/** Amount Y velocity is increased each cycle as a result of gravity */
private static final double GRAVITY = 3;
/** Animation delay or pause time between ball moves */
private static final int DELAY = 50;
/** Initial X and Y location of ball */
private static double X_START = DIAM_BALL / 2;
private static final double Y_START = 100;
/** X Velocity */
private static final double X_VEL = 5;
/** Amount Y Velocity is reduced when it bounces */
private static final double BOUNCE_REDUCE = 0.9;
/** Starting X and Y Velocties */
private double xVel = X_VEL;
private double yVel = 0.0;
/* private instance variable */
private GOval ball;
private AudioClip bounceClip = MediaTools.loadAudioClip("Basketball.wav");
public void run() {
while (true) {
// move ball to right
// end when ball moves off right side of screen
setup();
while (ball.getX() < getWidth()) {
moveBall();
checkForCollision();
pause(DELAY);
}
// move ball to left
xVel = -X_VEL;
X_START = getWidth() - DIAM_BALL;
setup();
while (ball.getX() > -DIAM_BALL - 5) {
moveBall();
checkForCollision();
pause(DELAY);
}
X_START = DIAM_BALL / 2;
xVel = X_VEL;
yVel = 0.0;
}
}
// Create and place ball
private void setup() {
ball = new GOval(X_START, Y_START, DIAM_BALL, DIAM_BALL);
ball.setFilled(true);
add(ball);
}
// Update/move ball down and sideways. yVel increases each cycle, due to gravity.
private void moveBall() {
yVel += GRAVITY;
ball.move(xVel, yVel);
}
private void checkForCollision() {
// check if ball has hit floor. If so, bounce it upwards.
if (ball.getY() > getHeight() - DIAM_BALL) {
bounceClip.play();
yVel = -yVel * BOUNCE_REDUCE; // bounces back almost to BOUNCE_REDUCE * starting height
// moves ball back above the floor the same distance it would have dropped below the floor in
// same time
double diff = ball.getY() - (getHeight() - DIAM_BALL);
ball.move(0, -2 * diff);
}
}
}