/**
* Copyright (c) 2012-2013 Nokia Corporation. All rights reserved.
* Nokia and Nokia Connecting People are registered trademarks of Nokia Corporation.
* Oracle and Java are trademarks or registered trademarks of Oracle and/or its
* affiliates. Other product and company names mentioned herein may be trademarks
* or trade names of their respective owners.
* See LICENSE.TXT for license information.
*/
package com.nokia.example.explonoid.game;
import com.nokia.example.explonoid.ExplonoidCanvas;
import com.nokia.example.explonoid.Main;
import com.nokia.example.explonoid.effects.LightManager;
import com.nokia.example.explonoid.effects.Slideable;
import com.nokia.example.explonoid.effects.Shaker;
import com.nokia.example.explonoid.effects.ShockWaveManager;
import com.nokia.example.explonoid.effects.SparkManager;
import com.nokia.example.explonoid.sensors.AccelerationProvider;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Random;
import javax.microedition.lcdui.game.LayerManager;
import javax.microedition.lcdui.game.Sprite;
import java.util.Vector;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
/**
* Handles the core functionality of gameplay.
*
* Core functionality includes e.g. collision detection,
* pointer actions, and plate movement.
*/
public class Game
extends LayerManager
implements Slideable {
public static final int STATE_MENU = 0;
public static final int STATE_INFO = 1;
public static final int STATE_TRANSITION = 2;
public static final int STATE_LEVEL = 3;
public static final int STATE_GAME_OVER = 4;
public static final int STATE_HIGH_SCORES = 5;
public static final int EVENT_BRICK_COLLISION = 0;
public static final int EVENT_BRICK_EXPLOSION = 1;
public static final int EVENT_PLATE_COLLISION = 2;
public static final int EVENT_WALL_COLLISION = 3;
public static final int EVENT_LEVEL_CHANGE = 4;
public static final int EVENT_BUTTON_PRESSED = 5;
public static final int EVENT_BALL_OUT = 6;
public static final int EVENT_BONUS = 7;
public static final int EVENT_LEVEL_STARTED = 8;
public static final int EVENT_GAME_OVER = 9;
private static final int LIVES = 5;
private static final int WALL_PADDING = 4;
private final int IN_X;
private final int OUT_X;
private int levelNumber;
private int plateY;
private int cornerX;
private int cornerY;
private int gameWidth;
private int gameHeight;
private int pointerX;
private double aX = 0;
private double vX = 0;
private boolean pointerPressed;
private boolean menuPressed = false;
private boolean changeLevel;
private boolean aiming = true;
private boolean sensorsEnabled = true;
private AccelerationProvider accelerationProvider;
private Resources r;
private Plate plate;
private Ball ball;
private BrickGrid bricks;
private Sprite leftWall;
private Sprite rightWall;
private Sprite topWall;
private Sprite dashboard;
private Sprite menuButton;
private Sprite newGameButton;
private Shaker shaker;
private ShockWaveManager shockWaveManager;
private SparkManager sparkManager;
private Vector lives;
private Random rnd = new Random();
private Font font = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_BOLD, Font.SIZE_SMALL);
private final Listener listener;
public interface Listener {
void changeState(int state);
void handleEvent(int event);
}
/**
* Constructor
* @param cornerX Horizontal position of the top left coordinate of the game area
* @param cornerY Vertical position of the top left coordinate of the game area
* @param width Width of the Game area
* @param height Height of the Game area
* @param r Game resources
* @param listener Game event listener
*/
public Game(int cornerX, int cornerY, int width, int height, Resources r, Listener listener) {
this.listener = listener;
this.gameWidth = width;
this.gameHeight = height;
this.r = r;
IN_X = cornerX;
OUT_X = cornerX + width;
this.cornerX = OUT_X;
this.cornerY = cornerY;
createGame();
setViewWindow(0, 0, width, height);
}
/**
* Creates and initializes the game assets
*/
private void createGame() {
lives = new Vector();
// Create Bricks
bricks = new BrickGrid(this, gameWidth, gameHeight, r);
// Create Plate
plate = new Plate(gameWidth, r);
plateY = gameHeight - plate.getHeight() - r.dashboard.getHeight() / 2;
plate.setPosition((gameWidth - plate.getWidth()) / 2, plateY);
// Create Ball
ball = new Ball(r);
// Create Walls
topWall = new Sprite(r.horizontalWall, r.horizontalWall.getWidth(), r.horizontalWall.getHeight() / 2);
leftWall = new Sprite(r.verticalWall, r.verticalWall.getWidth() / 2, r.verticalWall.getHeight());
rightWall = new Sprite(r.verticalWall, r.verticalWall.getWidth() / 2, r.verticalWall.getHeight());
int wallPadding = r.scale(WALL_PADDING);
topWall.defineCollisionRectangle(0, 0, gameWidth,
topWall.getHeight() - wallPadding);
leftWall.defineCollisionRectangle(0, 0,
leftWall.getWidth() - wallPadding, leftWall.getHeight() - wallPadding);
rightWall.defineCollisionRectangle(wallPadding, 0,
rightWall.getWidth() - wallPadding, rightWall.getHeight() - wallPadding);
topWall.setPosition(0, 0);
leftWall.setPosition(r.scale(-3), 0);
rightWall.setPosition(gameWidth + r.scale(3) - rightWall.getWidth(), 0);
// Create Dashboard
dashboard = new Sprite(r.dashboard);
dashboard.setPosition(0, gameHeight - dashboard.getHeight());
// Create Buttons
menuButton = new Sprite(r.menuButton);
menuButton.setPosition(r.scale(180), gameHeight - menuButton.getHeight());
newGameButton = new Sprite(r.newGameButton);
newGameButton.setPosition(r.scale(10), gameHeight - newGameButton.getHeight());
// Append sprites to LayerManager
append(plate);
append(topWall);
append(leftWall);
append(rightWall);
append(ball);
pointerPressed = false;
// Create effect managers
shockWaveManager = new ShockWaveManager();
sparkManager = new SparkManager(24, r, this);
shaker = new Shaker();
}
/**
* Render game graphics
*/
public void paint(Graphics g) {
shockWaveManager.paint(g);
paint(g, cornerX + shaker.magnitudeX, cornerY + shaker.magnitudeY);
if (lives.isEmpty()) {
g.drawImage(r.gameOver, cornerX + gameWidth / 2,
cornerY + gameHeight / 2, Graphics.VCENTER | Graphics.HCENTER);
}
g.setColor(0xFFFFFFFF);
g.setFont(font);
g.drawString("" + levelNumber, cornerX + shaker.magnitudeX + gameWidth / 2,
cornerY + shaker.magnitudeY + gameHeight, Graphics.BOTTOM | Graphics.HCENTER);
topWall.setFrame(0);
leftWall.setFrame(0);
rightWall.setFrame(0);
}
/**
* Update game logic
*/
public void update() {
if (!lives.isEmpty()) {
if (aiming) {
aim();
}
else {
ball.move();
// Ball out of screen
if (ball.getY() > gameHeight) {
sparkManager.burst(ball.getRefPixelX(), gameHeight);
int refX = cornerX + ball.getRefPixelX();
int refY = cornerY + ball.getRefPixelY();
shockWaveManager.createShockWave(refX, refY, r.scale(900), 3);
shockWaveManager.createShockWave(refX, refY, r.scale(500), 4);
shockWaveManager.createShockWave(refX, refY, r.scale(100), 6);
vibrate(1000);
LightManager.pulse(3);
Sprite life = (Sprite) lives.lastElement();
lives.removeElement(life);
remove(life);
if (lives.isEmpty()) {
newGameButton.setVisible(true);
listener.handleEvent(EVENT_GAME_OVER);
}
else {
placeBall();
}
listener.handleEvent(EVENT_BALL_OUT);
}
}
movePlate();
checkCollisions();
}
}
/**
* Keep ball attached to the plate
*/
private void aim() {
ball.setPosition(plate.getRefPixelX() - ball.getWidth() / 2, plate.getTopY() - ball.getHeight());
}
/**
* Set ball to its starting position and adjust velocity to
*/
public void placeBall() {
ball.setVelocityX(0);
ball.setVelocityY(r.scale(-4 - levelNumber / 3) - 1);
aiming = true;
aim();
}
/**
* Check collisions
*/
public void checkCollisions() {
checkPlateCollision();
checkWallCollisions();
checkBrickCollisions();
}
/**
* Check and act for collisions between the ball and the plate
*/
public void checkPlateCollision() {
if (ball.collidesWith(plate, false)) {
if (ball.getRefPixelY() < plate.getRefPixelY()) {
ball.bounceUp();
// Calculate horizontal velocity relative to the distance
// between plate center and collision point
ball.setVelocityX((int) Math.ceil(r.scale(-8.0)
* (plate.getRefPixelX() - ball.getRefPixelX())
/ (plate.getPlateWidth())));
listener.handleEvent(EVENT_PLATE_COLLISION); // Inform listener
}
}
}
/**
* Check and act for collisions between the ball and the walls
*/
public void checkWallCollisions() {
boolean collision = false;
if (ball.collidesWith(topWall, false) || ball.getY() < 0) {
ball.bounceDown();
topWall.setFrame(1); // Glow pulse
collision = true;
}
if (ball.collidesWith(leftWall, false) || ball.getX() < 0) {
ball.bounceRight();
leftWall.setFrame(1); // Glow pulse
collision = true;
}
else if (ball.collidesWith(rightWall, false)
|| ball.getX() + ball.getWidth() > gameWidth) {
ball.bounceLeft();
rightWall.setFrame(1); // Glow pulse
collision = true;
}
if (collision) {
listener.handleEvent(EVENT_WALL_COLLISION); // Inform listener
}
}
/**
* Check and act for collisions between the ball and the bricks
*/
public void checkBrickCollisions() {
// Check and get the brick that the ball collided with
Brick brick = bricks.collidesWith(ball);
if (brick != null) { // Check the bounce accordign to the hit position
if (ball.getRefPixelY() < brick.getRefPixelY()) {
ball.bounceUp();
}
else {
ball.bounceDown();
}
if (ball.getRefPixelX() < brick.getX()) {
ball.bounceLeft();
}
else if (ball.getRefPixelX() > brick.getX() + brick.getWidth()) {
ball.bounceRight();
}
// If the brick explodes...
if (brick.getFrame() % 2 == 0) {
remove(brick);
ball.changeVelocityX(rnd.nextInt(2));
sparkManager.burst(brick.getRefPixelX(), brick.getRefPixelY());
listener.handleEvent(EVENT_BRICK_EXPLOSION);
vibrate(40);
LightManager.pulse(2);
if (bricks.isEmpty()) {
changeLevel = true;
listener.changeState(STATE_LEVEL);
listener.handleEvent(EVENT_LEVEL_CHANGE);
}
else {
shaker.shake(ball.getVelocityX(), ball.getVelocityY());
}
}
else {
listener.handleEvent(EVENT_BRICK_COLLISION);
}
}
}
/**
* Handle pointer pressed
*/
public void pointerPressed(int x, int y) {
setPlateDestination(x);
if (menuButtonHit(x, y)) {
menuPressed = true;
}
}
/**
* Handle pointer released
*/
public void pointerReleased(int x, int y) {
stopMovement();
if (menuPressed && menuButtonHit(x, y)) {
rightButtonPressed();
}
else {
menuPressed = false;
if (aiming) {
aiming = false;
}
}
if (newGameButton.isVisible() && newGameButtonHit(x, y)) {
leftButtonPressed();
}
}
/**
* Handle pointer dragged
*/
public void pointerDragged(int x, int y) {
setPlateDestination(x);
}
/**
* Handle firing
*/
public void fire() {
if (aiming) {
aiming = false; // Release the ball
}
}
/**
* Handle left action key
*/
public void leftButtonPressed() {
if (lives.isEmpty()) {
listener.changeState(STATE_LEVEL);
newGame();
}
}
/**
* Handle right action key
*/
public void rightButtonPressed() {
listener.changeState(STATE_MENU);
listener.handleEvent(EVENT_BUTTON_PRESSED);
}
/**
* Set the plate moving towards given x coordinate
*/
public void setPlateDestination(int x) {
pointerPressed = true;
plate.setMoving(x);
pointerX = x;
}
/**
* Moves plate towards set destination or according to acceleration sensors
*/
public void movePlate() {
if (pointerPressed) {
int distance = plate.getRefPixelX() - pointerX;
if (distance > 0 && plate.getLeftX() > 0
|| distance < 0 && plate.getRightX() < gameWidth) {
distance *= 0.94; // Shorten the distance with easing
}
plate.setRefPixelPosition(pointerX + distance, plate.getRefPixelY());
if (distance == 0) {
stopMovement();
}
}
else if (accelerationProvider != null) {
// Calculate velocity according to acceleration on x-axis and convert
vX -= gameWidth * aX * ExplonoidCanvas.INTERVAL / 5000;
if (Math.abs(vX) > 1) {
if (vX < 0 && plate.getLeftX() > 0 || vX > 0 && plate.getRightX() < gameWidth) {
if (plate.getLeftX() + vX < 0) {
vX = -plate.getLeftX();
}
else if (plate.getRightX() + vX > gameWidth) {
vX = gameWidth - plate.getRightX();
}
plate.move((int) vX, 0);
}
vX = 0.0;
}
}
}
/**
* Moves plate one constant step to the left
*/
public void movePlateLeft() {
if (plate.getLeftX() > 0) {
plate.moveLeft();
}
}
/**
* Moves plate one constant step to the right
*/
public void movePlateRight() {
if (plate.getRightX() < gameWidth) {
plate.moveRight();
}
}
public void stopMovement() {
pointerPressed = false;
plate.stop();
}
/**
* Vibrate device
* @param duration
*/
public void vibrate(int duration) {
Display display = Display.getDisplay(Main.getInstance());
display.vibrate(duration);
}
private boolean menuButtonHit(int x, int y) {
return containsPoint(x, y, menuButton);
}
private boolean newGameButtonHit(int x, int y) {
return containsPoint(x, y, newGameButton);
}
/**
* Checks whether a coordinate overlaps the bounding rectangle of a sprite
*/
private boolean containsPoint(int x, int y, Sprite sprite) {
return x >= sprite.getX() && x <= sprite.getX() + sprite.getWidth()
&& y >= sprite.getY();
}
/**
* Starts a new game
*/
public void newGame() {
levelNumber = 0;
initDashboard(LIVES);
nextLevel();
}
/**
* Loads the next level
*/
public void nextLevel() {
placeBall();
levelNumber++;
loadLevel(levelNumber);
}
/**
* Loads up a level
* @param number
*/
public void loadLevel(int number) {
bricks.load(this, Levels.getLevel((number - 1) % Levels.LEVEL_COUNT + 1));
}
/**
* Initializes the dashboard
* @param balls Number of balls left
*/
public void initDashboard(int balls) {
if (balls > 0) {
newGameButton.setVisible(false);
}
insert(dashboard, 0);
insert(menuButton, 0);
insert(newGameButton, 0);
while (lives.size() > 0) {
Sprite life = (Sprite) lives.lastElement();
lives.removeElement(life);
remove(life);
}
for (int i = 0; i < balls; i++) {
Sprite life = new Sprite(r.life);
life.setPosition(r.scale(12) + i * life.getWidth(), gameHeight - r.scale(14));
lives.addElement(life);
insert(life, 0);
}
if (lives.size() > 0) {
((Sprite) (lives.elementAt(0))).setVisible(false);
}
}
/**
* Serializes the game data
* @return Game data as a byte array
*/
public byte[] getSnapshot() {
ByteArrayOutputStream bout = null;
try {
bout = new ByteArrayOutputStream();
DataOutputStream dout = new DataOutputStream(bout);
dout.writeInt(levelNumber);
dout.writeInt(lives.size());
dout.writeBoolean(aiming);
dout.writeInt(plate.getX());
dout.writeInt(plate.getY());
dout.writeInt(ball.getX());
dout.writeInt(ball.getY());
dout.writeInt(ball.getVelocityX());
dout.writeInt(ball.getVelocityY());
bricks.writeTo(dout);
return bout.toByteArray();
}
catch (IOException e) {
}
finally {
try {
if (bout != null) {
bout.close();
}
}
catch (IOException e) {
}
}
return new byte[0];
}
/**
* Deserializes game data
* @param record Game data in byte array
* @return True, if loading was successful - otherwise false
*/
public boolean load(byte[] record) {
if (record == null) {
return false;
}
try {
DataInputStream din = new DataInputStream(new ByteArrayInputStream(record));
levelNumber = din.readInt();
initDashboard(din.readInt());
aiming = din.readBoolean();
plate.setPosition(din.readInt(), din.readInt());
ball.setPosition(din.readInt(), din.readInt());
ball.setVelocityX(din.readInt());
ball.setVelocityY(din.readInt());
bricks.load(this, bricks.readFrom(din));
return true;
}
catch (IOException e) {
}
return false;
}
/**
* Moves the view inwards
*/
public boolean slideIn() {
int distance = cornerX - IN_X;
distance *= 0.8;
cornerX = IN_X + distance;
boolean sliding = distance != 0;
if (!sliding && sensorsEnabled) {
accelerationProvider = AccelerationProvider.getProvider(
new AccelerationProvider.Listener() {
public void dataReceived(double ax, double ay, double az) {
aX = ax;
}
});
listener.handleEvent(EVENT_LEVEL_STARTED);
}
return sliding;
}
/**
* Moves the view outwards
*/
public boolean slideOut() {
if (accelerationProvider != null) {
accelerationProvider.close();
accelerationProvider = null;
}
int distance = cornerX - OUT_X;
distance *= 0.8;
cornerX = OUT_X + distance;
if (distance == 0 && changeLevel) {
changeLevel = false;
nextLevel();
}
return distance != 0;
}
public void enableSensors(boolean value) {
sensorsEnabled = value;
}
}