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;
}
}
/** getReady: Initialize the game */
private void getReady() {
// Make up the bricks
double brickPerWidth =
(getWidth() - DIST_BRICK_WALL * 2 - DIST_BRICK_BRICK * (NUM_BRICK_ROW - 1)) / NUM_BRICK_ROW;
double brickPerHeight = BRICK_HEIGHT;
double x_start = DIST_BRICK_WALL;
double y_start;
for (int i = 1; i <= NUM_BRICK_ROW; i++) {
for (int j = 1; j <= NUM_BRICK_COL; j++) {
y_start = 50 + (j - 1) * (DIST_BRICK_BRICK + brickPerHeight);
GRect tmpbrick = new GRect(brickPerWidth, brickPerHeight);
tmpbrick.setFilled(true);
add(tmpbrick, x_start, y_start);
}
x_start += DIST_BRICK_BRICK + brickPerWidth;
}
// Make up the board
board = new GRect(BOARD_WIDTH, BOARD_HEIGHT);
board.setFilled(true);
add(board, (getWidth() - BOARD_WIDTH) / 2, (getHeight() - 30));
// Place the ball
ball = new GOval(BALL_RADIUS * 2, BALL_RADIUS * 2);
ball.setFilled(true);
ball.setColor(Color.RED);
add(ball, (getWidth() - BALL_RADIUS * 2) / 2, (getHeight() - 30 - BALL_RADIUS * 2));
// Set up random generator
rgen = RandomGenerator.getInstance();
// Add Listeners
addMouseListeners();
}
private void PrecisionPaddle() {
if (ball.getY()
> HEIGHT
- PADDLE_Y_OFFSET
- PADDLE_HEIGHT
- BALL_RADIUS * 2) { // check if the ball drops below the paddle
double diff = ball.getY() - (HEIGHT - PADDLE_Y_OFFSET - PADDLE_HEIGHT - BALL_RADIUS * 2);
ball.move(0, -2 * diff); // move ball an amount equal to the amount it drops below the paddle
}
}
public void run() {
for (int i = 0; i < NCIRCLES; i++) {
double r = rgen.nextDouble(MIN_RADIUS, MAX_RADIUS);
double x = rgen.nextDouble(0, getWidth() - 2 * r);
double y = rgen.nextDouble(0, getHeight() - 2 * r);
GOval circle = new GOval(x, y, 2 * r, 2 * r);
circle.setFilled(true);
circle.setColor(rgen.nextColor());
add(circle);
}
}
private void checkWall() {
boolean checkLeftWall = ball.getX() <= 0;
boolean checkRightWall = ball.getX() + BALL_RADIUS * 2 >= WIDTH;
boolean checkTop = ball.getY() <= 0;
if ((checkLeftWall) || (checkRightWall)) {
vx = -vx;
}
if (checkTop) {
vy = -vy;
}
}
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);
}
}
private void drawBall() {
double x = WIDTH / 2 - BALL_RADIUS;
double y = HEIGHT / 2 - BALL_RADIUS;
double d = 2 * BALL_RADIUS;
ball = new GOval(x, y, d, d);
ball.setFilled(true);
add(ball);
}
private void checkObject() {
// x and y parameters for the different corners
double leftX = ball.getX();
double rightX = ball.getX() + (2 * BALL_RADIUS);
double upperY = ball.getY();
double lowerY = ball.getY() + (2 * BALL_RADIUS);
// check the corners for object
GObject upperLeft = checkCorner(leftX, upperY); // check upper-left corner
if (upperLeft == null) {
GObject upperRight = checkCorner(rightX, upperY); // check upper-right corner
}
GObject lowerLeft = checkCorner(leftX, lowerY); // //check lower-left corner
if (lowerLeft == null) {
GObject lowerRight = checkCorner(rightX, lowerY); // check lower-right corner
if ((lowerLeft == paddle)
&& (lowerRight == paddle)) { // When both lower corners hit paddle, change direction.
vy = -vy;
}
}
}
private void gaming() {
boolean loseOneTurn;
boolean win = false;
boolean stillAlive = true;
for (int i = NTURNS; i > 0; i--) { // loops for the number of turns.
GLabel life = showLifeCount(i);
waitForClick();
add(life);
while (stillAlive) { // the ball moves and bounces until the user loses or wins the turn.
moveBall();
loseOneTurn =
(ball.getY() >= HEIGHT); // user loses one turn when the ball falls under the paddle.
win = (brickCount == 0); // user wins when there is no brick left.
stillAlive = !(loseOneTurn || win);
}
if (win) break; // breaks from the loop if the user wins in one turn.
remove(ball);
createBall(); // a new ball appears on the center of the screen after one turn
stillAlive = true;
remove(life);
}
}
// Update/move ball down and sideways. yVel increases each cycle, due to gravity.
private void moveBall() {
yVel += GRAVITY;
ball.move(xVel, yVel);
}
// Create and place ball
private void setup() {
ball = new GOval(X_START, Y_START, DIAM_BALL, DIAM_BALL);
ball.setFilled(true);
add(ball);
}
private void startFall() {
ball.move(vx, vy);
pause(DELAY);
ball.sendToBack();
}
/** Check for collision */
private void checkRebounce() {
// check for left/right/top wall
if (ball.getX() < 0) {
vx *= -1;
ball.move(vx, 0);
return;
} else if ((ball.getX() + 2 * BALL_RADIUS) > getWidth()) {
vx *= -1;
ball.move(vx, 0);
return;
} else if (ball.getY() < 0) {
ball.setLocation(ball.getX(), -ball.getY());
vy *= -1;
return;
}
// check for collision with bricks: from the four vertexs
lefttop = getElementAt(ball.getX(), ball.getY());
righttop = getElementAt(ball.getX() + 2 * BALL_RADIUS, ball.getY());
leftbottom = getElementAt(ball.getX(), ball.getY() + 2 * BALL_RADIUS);
rightbottom = getElementAt(ball.getX() + 2 * BALL_RADIUS, ball.getY() + 2 * BALL_RADIUS);
if ((lefttop != null) && (righttop != null) && (lefttop != board) && (lefttop != mylabel)) {
remove(lefttop);
num_brick_left--;
vy *= -1;
} else if ((righttop != null)
&& (rightbottom != null)
&& (righttop != board)
&& (righttop != mylabel)) {
remove(righttop);
num_brick_left--;
vx *= -1;
} else if ((rightbottom != null)
&& (leftbottom != null)
&& (rightbottom != board)
&& (rightbottom != mylabel)) {
remove(rightbottom);
num_brick_left--;
vy *= -1;
} else if ((leftbottom != null)
&& (lefttop != null)
&& (leftbottom != board)
&& (leftbottom != mylabel)) {
remove(leftbottom);
num_brick_left--;
vx *= -1;
}
// check for collision with board
if (getElementAt(ball.getX(), (ball.getY() + BALL_RADIUS / 2)) == board) {
vy *= -1;
ball.move(0, vy);
}
}
/** Move the ball */
private void moveBall() {
ball.move(vx, vy);
}
/** Check whether the game is over */
private boolean gameover() {
return (ball.getY() > (getHeight() - 2 * BALL_RADIUS)) || (num_brick_left == 0);
}
/*Defines and places the Rent state as a circle */
private void placeRent(int x, int y, int width, int height, Color rentColor) {
GOval shape = new GOval(x, y, width, height);
shape.setFilled(true);
shape.setColor(rentColor);
add(shape);
}