BrickBuster/core/src/com/me/brickbuster/BrickBuster.java

package com.me.brickbuster;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.math.Vector2;
import com.me.brickbuster.entity.*;
import com.me.brickbuster.entity.powerup.*;

import java.util.*;

public class BrickBuster extends ApplicationAdapter {

	public static final int WIDTH = 800;
	public static final int HEIGHT = 600;
	public static final String TITLE = "Brick Buster";

	public static final int SHIELD_HEIGHT = 5;

	public static final Vector2 HORIZONTAL_EDGE = new Vector2(1, 0);
	public static final Vector2 VERTICAL_EDGE = new Vector2(0, 1);

	private static final Map<Class<? extends PowerUp>, Integer> powerUpWeights;
	private static final int weightSum;

	private BitmapFont font;
	private SpriteBatch batch;
	private ShapeRenderer sr;

	private Paddle paddle;
	private ArrayList<Ball> balls;
	private ArrayList<Brick> bricks;
	private ArrayList<PowerUp> powerUps;

	private boolean shieldActive = false;

	@Override
	public void create () {
		font = new BitmapFont();
		batch = new SpriteBatch();
		sr = new ShapeRenderer();

		paddle = new Paddle(this);

		powerUps = new ArrayList<PowerUp>();

		bricks = new ArrayList<Brick>();
		for (int col = 0; col < 13; col++) {
			for (int row = 0; row < 7; row++) {
				int x = 15 + (col * (Brick.BLOCK_WIDTH + 10));
				int y = 15 + Brick.BLOCK_HEIGHT + (row * (Brick.BLOCK_HEIGHT + 10));
				Class<? extends PowerUp> powerUpType = null;
				if (MathUtils.randomBoolean(0.15f)) {
					powerUpType = getWeightedPowerUp();
				}
				bricks.add(new Brick(this, powerUpType, x, HEIGHT - y));
			}
		}

		balls = new ArrayList<Ball>();
		balls.add(new Ball(this));
	}

	@Override
	public void render () {
		Gdx.gl.glClearColor(0.5f,1,1,1);
		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);


		long start_update = System.nanoTime();
		update(Gdx.graphics.getDeltaTime());
		long finish_update = System.nanoTime() - start_update;

		long start_render = System.nanoTime();
		for (Brick block : bricks) {
			block.render();
		}
		for (PowerUp powerUp : powerUps) {
			powerUp.render();
		}
		for (Ball ball : balls) {
			ball.render();
		}
		paddle.render();

		if (shieldActive) {
			sr.begin(ShapeRenderer.ShapeType.Filled);
			sr.setColor(Color.SALMON);
			sr.rect(0, 0, WIDTH, SHIELD_HEIGHT);
			sr.end();
		}

		long finish_render = System.nanoTime() - start_render;

		batch.begin();
		//batch.setColor(Color.BLACK);
		font.draw(batch, String.format("FPS: %d Update: %.2f ms Render: %.2f ms",
				Gdx.graphics.getFramesPerSecond(), finish_update/1000000f, finish_render/1000000f), 0, 13);
		batch.end();
	}

	public void update(float dt) {
		for (Iterator<Ball> it = balls.iterator(); it.hasNext();) {
			Ball ball = it.next();
			ball.update(dt);
			if (ball.isDead()) {
				it.remove();
			}
		}

		if (balls.isEmpty()) {
			reset();
		}

		paddle.update(dt);

		for (Iterator<PowerUp> it = powerUps.iterator(); it.hasNext();) {
			PowerUp powerUp = it.next();
			powerUp.update(dt);
			if(powerUp.isCaught()) {
				it.remove();
			}
		}

		if (getBricks().isEmpty()) {
			create();
		}
	}

	public void reset() {
		Paddle paddle = getPaddle();
		Ball ball = new Ball(this);
		ball.setX(paddle.getX());
		ball.setY(Paddle.PADDLE_Y + Paddle.PADDLE_HEIGHT + Ball.RADIUS);
		balls.add(ball);
		paddle.setSticky(false);
		paddle.setWidth(Paddle.DEFAULT_WIDTH);
	}

	@Override
	public void dispose () {
	}

	private static final Class<? extends PowerUp> getWeightedPowerUp() {
		int remaining = MathUtils.random(weightSum);
		for (Map.Entry<Class<? extends PowerUp>, Integer> entry : powerUpWeights.entrySet()) {
			remaining -= entry.getValue();
			if (remaining < 0) {
				return entry.getKey();
			}
		}
		return null;
	}

	public void setShieldActive(boolean shieldActive) {
		this.shieldActive = shieldActive;
	}

	public boolean isShieldActive() {
		return shieldActive;
	}

	public ArrayList<Ball> getBalls() {
		return balls;
	}

	public Paddle getPaddle() {
		return paddle;
	}

	public ArrayList<Brick> getBricks() {
		return bricks;
	}

	public void addPowerUp(PowerUp powerUp) {
		this.powerUps.add(powerUp);
	}

	static {
		Map<Class<? extends PowerUp>, Integer> tmp = new HashMap<Class<? extends PowerUp>, Integer>();

		// Assign PowerUp weights here
		tmp.put(GluePowerUp.class, 30);
		tmp.put(LongerPaddlePowerUp.class, 40);
		tmp.put(MultiBallPowerUp.class, 20);
		tmp.put(ShieldPowerUp.class, 40);
		powerUpWeights = Collections.unmodifiableMap(tmp);

		int sum = 0;
		for (int x : powerUpWeights.values()) {
			sum += x;
		}
		weightSum = sum;
	}
}