@Override
public void update(float pDeltaTime) {
mGame.getInput().getMouseEvents();
mGame.getInput().getKeyEvents();
int len = mBalls.size();
for (int i = 0; i < len; i++) {
Ball firstBall = mBalls.get(i);
for (int j = 0; j < len; j++) {
Ball secondBall = mBalls.get(i);
if (secondBall == firstBall
|| !OverlapTester.overlapCircles(firstBall.bounds, secondBall.bounds)) {
continue;
}
System.out.println("overlap");
float newVelocityX1 =
(firstBall.velocity.x * (firstBall.mass - secondBall.mass)
+ (2 * secondBall.velocity.x * secondBall.mass))
/ (firstBall.mass + secondBall.mass);
float newVelocityY1 =
(firstBall.velocity.y * (firstBall.mass - secondBall.mass)
+ (2 * secondBall.velocity.y * secondBall.mass))
/ (firstBall.mass + secondBall.mass);
float newVelocityX2 =
(secondBall.velocity.x * (secondBall.mass - firstBall.mass)
+ (2 * firstBall.velocity.x * firstBall.mass))
/ (firstBall.mass + secondBall.mass);
float newVelocityY2 =
(secondBall.velocity.y * (secondBall.mass - firstBall.mass)
+ (2 * firstBall.velocity.y * firstBall.mass))
/ (firstBall.mass + secondBall.mass);
firstBall.velocity.add(newVelocityX1, newVelocityY1);
secondBall.velocity.add(newVelocityX2, newVelocityY2);
}
// firstBall.velocity.add(mGravity.x * pDeltaTime, mGravity.y * pDeltaTime);
firstBall.update(pDeltaTime);
if (firstBall.getX() < firstBall.getWidth() / 2) {
firstBall.setX(firstBall.getWidth() / 2);
firstBall.velocity.x *= -1;
}
if (firstBall.getX() > mWidth - firstBall.getWidth() / 2) {
firstBall.setX(mWidth - firstBall.getWidth() / 2);
firstBall.velocity.x *= -1;
}
if (firstBall.getY() < firstBall.getWidth() / 2) {
firstBall.setY(firstBall.getWidth() / 2);
firstBall.velocity.y *= -1;
}
if (firstBall.getY() > mHeight - firstBall.getHeight() / 2) {
firstBall.setY(mHeight - firstBall.getHeight() / 2);
firstBall.velocity.y *= -1;
}
}
}
public void updateSizes(int width, int height) {
frameWidth = width;
frameHeight = height;
ball.setX((frameWidth - ball.getDiameter()) / 2);
ball.setY((frameHeight - ball.getDiameter()) / 2);
// System.out.println(this.getWidth() +" " + this.getHeight());
this.setSize(frameWidth, frameHeight);
}
public void followMouse() {
if (draggedMouseX != -1 && draggedMouseY != -1) {
ball.setX(draggedMouseX - ball.getDiameter() / 2);
ball.setY(draggedMouseY - ball.getDiameter() / 2);
// System.out.println(draggedMouseX + " "+ draggedMouseY);
repaint();
}
}
public void moveBall() {
if (moveRight == true) {
if (ball.getX() < frameWidth - ball.getDiameter()) {
ball.setX(ball.getX() + 1);
if (moveDown == true) {
if (ball.getY() < this.getWidth() - ball.getDiameter()) {
ball.setY(ball.getY() + 1);
} else {
moveDown = false;
}
} else {
if (ball.getY() >= 0) {
ball.setY(ball.getY() - 1);
} else {
moveDown = true;
}
}
} else {
moveRight = false;
}
} else {
if (ball.getX() >= 0) {
ball.setX(ball.getX() - 1);
if (moveDown == true) {
if (ball.getY() < this.getWidth() - ball.getDiameter()) {
ball.setY(ball.getY() + 1);
} else {
moveDown = false;
}
} else {
if (ball.getY() >= 0) {
ball.setY(ball.getY() - 1);
} else {
moveDown = true;
}
}
} else {
moveRight = true;
}
}
repaint();
}
public void paint(Graphics g) {
// set up the double buffering to make the game animation nice and smooth
Graphics2D twoDGraph = (Graphics2D) g;
// take a snap shop of the current screen and same it as an image
// that is the exact same width and height as the current screen
if (back == null) back = (BufferedImage) (createImage(getWidth(), getHeight()));
// create a graphics reference to the back ground image
// we will draw all changes on the background image
Graphics graphToBack = back.createGraphics();
if (lives < 1) {
ball.setXSpeed(0);
ball.setYSpeed(0);
paddle.setSpeed(0);
graphToBack.drawString("GAME OVER", 387, 30);
} else if (bricks.isEmpty()) {
ball.setXSpeed(0);
ball.setYSpeed(0);
paddle.setSpeed(0);
graphToBack.drawString("YOU WIN", 387, 30);
}
ball.moveAndDraw(graphToBack);
paddle.draw(graphToBack);
for (Block x : bricks) {
x.draw(graphToBack);
}
graphToBack.setColor(Color.white);
graphToBack.drawString(score + ":" + lives, 387, 15);
if (ball.didCollide(left) || ball.didCollide(right)) {
ball.setXSpeed(-ball.getXSpeed());
}
if (ball.didCollide(top)) {
ball.setYSpeed(-ball.getYSpeed());
}
if (ball.didCollide(bottom)) {
ball.draw(graphToBack, Color.white);
ball.setXSpeed(2);
ball.setYSpeed(2);
ball.setX(400);
ball.setY(500);
lives--;
ball.setYSpeed(-ball.getYSpeed());
}
// see if the ball hits the paddle
if (ball.didCollide(paddle)) ball.setYSpeed(-ball.getYSpeed());
// brick collision
for (Block x : bricks) {
if (x.didCollide(ball)) {
score++;
x.draw(graphToBack, Color.white);
bricks.remove(x);
if (ball.didCollideTop(x) || ball.didCollideBottom(x)) ball.setYSpeed(-ball.getYSpeed());
else ball.setXSpeed(-ball.getXSpeed());
}
}
// see if the paddles need to be moved
graphToBack.setColor(Color.black);
graphToBack.drawString(score + ":" + lives, 387, 15);
if (keys[0]) paddle.moveLeftAndDraw(graphToBack);
if (keys[1]) paddle.moveRightAndDraw(graphToBack);
twoDGraph.drawImage(back, null, 0, 0);
}
/**
* Determines if the given ball has collided with the paddle and returns true if it has and false
* if it has not. If the ball has collided with the paddle the balls movement vectors are modified
* so the ball will bounce back at the proper angle.
*
* @param ball is the ball to examine to see if it has collided with the paddle
* @return Returns true if ball collides with paddle and if so updates vectors
*/
public boolean collision(Ball ball) {
// Temp variables for paddle corner coordinates;
int pX1 = this.x;
int pX2 = pX1 + this.width - 1;
int pY1 = this.y;
int pY2 = pY1 + this.height - 1;
// Temp variables for ball coordinates, movement vectors, and radius
int bX = ball.getX();
int bY = ball.getY();
int vX = ball.getXVector();
int vY = ball.getYVector();
int bRad = ball.getRadius();
// Testing for collisions with the paddle edges and the Ball
if (bX < pX1 && bY >= pY1 && bY <= pY2 && vX > 0) // left edge
{
if (bX + bRad > pX1) // will collide with edge
{
ball.setX(pX1 - bRad);
ball.setXVector(-Math.abs(vX)); // Change x direction
return true;
}
} else if (bX > pX2 && bY >= pY1 && bY <= pY2 && vX < 0) // right edge
{
if (bX - bRad < pX2) // will collide with edge
{
ball.setX(pX2 + bRad);
ball.setXVector(Math.abs(vX)); // Change x direction
return true;
}
} else if (bY < pY1 && bX >= pX1 && bX <= pX2 && vY > 0) // top edge
{
if (bY + bRad > pY1) // will collide with edge
{
ball.setY(pY1 - bRad);
ball.setYVector(-Math.abs(vY)); // Change y direction
return true;
}
} else if (bY > pY2 && bX >= pX1 && bX <= pX2 && vY < 0) // bottom edge
{
if (bY - bRad < pY2) // will collide with edge
{
ball.setY(pY2 + bRad);
ball.setYVector(Math.abs(vY)); // Change y direction
return true;
}
} else // Otherwise test to see if the ball hits a corner of the paddle
{
if (ball.distance(pX1, pY1) <= bRad
&& ball.distance(pX1, pY1) <= ball.distance(pX2, pY1)) { // top-left corner collision
if (Math.abs(pX1 - bX) >= Math.abs(pY1 - bY)) if (vX > 0) ball.setXVector(-vX);
if (Math.abs(pX1 - bX) <= Math.abs(pY1 - bY)) if (vY > 0) ball.setYVector(-vY);
return true;
} else if (ball.distance(pX2, pY1) <= bRad) { // top-right corner collision
if (Math.abs(pX2 - bX) >= Math.abs(pY1 - bY)) if (vX < 0) ball.setXVector(-vX);
if (Math.abs(pX2 - bX) <= Math.abs(pY1 - bY)) if (vY > 0) ball.setYVector(-vY);
return true;
} else if (ball.distance(pX2, pY2) <= bRad
&& ball.distance(pX2, pY2) <= ball.distance(pX1, pY2)) { // bottom-right corner collision
if (Math.abs(pX2 - bX) >= Math.abs(pY2 - bY)) if (vX < 0) ball.setXVector(-vX);
if (Math.abs(pX2 - bX) <= Math.abs(pY2 - bY)) if (vY < 0) ball.setYVector(-vY);
return true;
} else if (ball.distance(pX1, pY2) <= bRad) { // bottom-left corner collision
if (Math.abs(pX1 - bX) >= Math.abs(pY2 - bY)) if (vX > 0) ball.setXVector(-vX);
if (Math.abs(pX1 - bX) <= Math.abs(pY2 - bY)) if (vY < 0) ball.setYVector(-vY);
return true;
}
}
return false;
}
