engine.java

J2ME做的打砖块游戏,是学校的课程项目

					level = 0;
				}

				restartLevel();
			}
			else
			{
				ballNumber = 1;
				if (i == 0)
					ball[0] = ball[1];

			}
		}
		ballCollisioned(i);

		if (ball[i].vx > 2.0f)
			ball[i].vx = 2.0f;
		if (ball[i].vx < -2.0f)
			ball[i].vx = -2.0f;
		if (ball[i].vy > 2.0f)
			ball[i].vy = 2.0f;
		if (ball[i].vy < -2.0f)
			ball[i].vy = -2.0f;

		if ((int)(ball[i].vx) == 0)
		{
			ball[i].vx = ((float)(randomG.nextG(7) - 64)) / 50.0f;
		}
		if ((int)(ball[i].vy) == 0)
		{
			ball[i].vy = ((float)(randomG.nextG(7) - 64)) / 50.0f;
		}


	}

	public void capsulemoveLimit(int i)
	{
		if (capsule[i].vx < 0 && capsule[i].x <= 0)
			capsule[i].vx *= -1.0f;
		else if (capsule[i].x + capsule[i].cx >= Screen.width && capsule[i].vx > 0)
			capsule[i].vx *= -1.0f;

		if (capsule[i].vy < 0 && capsule[i].y <= 0)
			capsule[i].vy *= -1.0f;
		else if (capsule[i].vy > 0 && capsule[i].y + capsule[i].cy >= Screen.height - (Screen.fontHeight + 3))
		{
			capsule[i].use();
		}
		capsuleCollisioned(i);

	}
	public void ballCollisioned(int i)
	{
		ball[i].CollisionWithObject(paddle);

		for (int x = 0; x < brickNum; x++)
			{
				if (bricks[x].strong > 0)
				{
					if (ball[i].CollisionWithObject(bricks[x]))
					{
	
						if ((bricks[x].strong -= 1) <= 0)
						{
							brickCount--;
							score += ((Brick)bricks[x]).count;
							hs.processDoc("/score.txt");
							hs.setScore(score);
						    rank = hs.compareScore();
							if(rank >= 2 && rank <= 10)
								nextScore = hs.Score[rank - 2];
							else if( rank == -1)
								nextScore = hs.Score[9];
							else if ( rank == 1)
								nextScore = -1;

							emitBonus(bricks[x].bonus, bricks[x].x + 32 / 2 - 7, bricks[x].y + 18);
							if (brickCount <= 0)
							{
								ballNumber = 0;
								capsuleNumber = 0;
								brickNum = 0;
								paddleNumber = 0;
								level++;

								if (level < 3)
								{
									startLevel();

								}
								else
								{
									level = 0;
									startLevel();
								}
							}
						}
					}
				}
			}


	}

	public void capsuleCollisioned(int i)
	{
		if (capsule[i].CollisionWithObject(paddle))
		{
			capsule[i].use();
			useBonus(i);
		}
	}

	public void useBonus(int i)
	{
		currentCapsule = i;
		bonusbeginTime = 0;
		switch (capsule[i].type)
		{	
			case 3:
				plateEnlarge();
				break;
		}
	}

	public void resumebeforeBounus()
	{
		int i = capsule[currentCapsule].type;

		switch (i)
		{

			case 3:
				paddle.enlarge("/j6.png", changeRatioToPixW(conf.paddles[0].shape_width), changeRatioToPixW(conf.paddles[0].shape_height));
				break;
		}

	}

	
	public void emitBonus(int bonus, int x, int y)
	{
		switch (bonus)
		{
			case 2:
				twoBalls();
				break;
			case 3:
				capsule[capsuleNumber] = new Capsule("/j12.png", x, y,
																0, 1.5f, 3);
				capsule[capsuleNumber].setPos(x, y);
				capsuleNumber = capsuleNumber + 1;
				break;
		}
	}


	public void twoBalls()
	{
		if (ballNumber == 1)
		{
			ball[1] = new Ball("/j5.png", (int)(Screen.width * conf.ball_initpos_width), (int)(Screen.height * conf.ball_initpos_height), (float)(conf.ball_initspeed_width), (float)(conf.ball_initspeed_height), 0);
			ballNumber = 2;
			
		}
	}

	public void plateEnlarge()
	{
		paddle.enlarge("/j2.png", changeRatioToPixW(conf.paddles[0].shape_width) * 2, changeRatioToPixW(conf.paddles[0].shape_height));
	}

	public void run()
	{
		boolean recentCollision;
		long then;
		int px, pw, delta;
		int paddleSpeed = 0;
		
		recentCollision = false;
		then = System.currentTimeMillis();

		while (!done)
		{
			if ((state == TITLE || state == OVER || state == HELP || state == NONETWORK)
				&& System.currentTimeMillis() - lastKeyPress > LAST_KEY_DELTA)
			{
				state = MENU;
				lastKeyPress = System.currentTimeMillis();
			}

			if ((state == PLAY) && !paused)
			{

				if (key == Canvas.LEFT)
				{
					left = true;
					right = false;
				}
				else if (key == Canvas.RIGHT)
				{
					left = false;
					right = true;
				}
				else if (key == 0)
				{
					left = false;
					right = false;
				}


				paddle.move(left, right);
				paddle.getV();
				platemoveLimit();
				for (int i = 0; i < ballNumber; i++)
				{
					if (ball[i].CollisionWithObject(this.paddle))
						plategenerateMove = false;
					ballmoveLimit(i);
					ball[i].generateMove();
				}
				if (capsuleNumber > 0)
				{
					for (int i = 0; i < capsuleNumber; i++)
					{
						if (!capsule[i].isUsed())
						{
							capsulemoveLimit(i);
							capsule[i].generateMove();
						}
					}
				}
				if (plategenerateMove)
					paddle.generateMove();
				plategenerateMove = true;
				
			}

			screen.repaint();
			delta = (int)(System.currentTimeMillis() - then);

			if (delta < 10)
			{
				try
				{
					Thread.sleep(10 - delta);
				}
				catch (InterruptedException e) { }
			}

			then = System.currentTimeMillis();

			bonusbeginTime = bonusbeginTime + 10;

			if (bonusbeginTime > 10000 && currentCapsule != -1)
			{
				resumebeforeBounus();
				
			}
		}
	}

	public int randomGen(double chance)
	{
		

		Random random = new Random(System.currentTimeMillis());
		int k = random.nextInt();
		int j = Math.abs(k % 100);
		
		System.out.println("randombrick" + j);
		int barrier = (int)(chance * 100);
		if (j > barrier)
		{
			return 1;
		}
		else
			return 2;




	
	}

	public int randomBrick(double chance)
	{
		//return 1;
		
		Random random = new Random(System.currentTimeMillis());
		int k = random.nextInt();
		int j = Math.abs(k % 100);
		
		System.out.println("randombrick" + j);
		int barrier = (int)(chance * 100);
		if (j > barrier)
		{
			return 1;
		}
		else
			return 3;

		

	}

	public Image scale(Image src, int width, int height)
	{
		
		int scanline = src.getWidth();
		int srcw = src.getWidth();
		int srch = src.getHeight();
		int buf[] = new int[srcw*srch];
		src.getRGB(buf, 0, scanline, 0, 0, srcw, srch);
		int buf2[] = new int[width*height];
		for (int y = 0; y < height; y++)
		{
			int c1 = y * width;
			int c2 = (y * srch / height) * scanline;
			for (int x = 0; x < width; x++)
			{
				buf2[c1 + x] = buf[c2 + x * srcw / width];
			}
		}
		Image img = Image.createRGBImage(buf2, width, height, true);
		
		return img;
	}

	protected void setState(int state)
	{
		this.state = state;
	}

	protected int getAvailableLevels()
	{
		return availableLevels;
	}

	protected int getAvailableLives()
	{
		return availableLives;
	}


	protected void showMenu()
	{
					state = MENU;
					oldBricks = bricks;
					paused = true;
					screen.repaint();
	}

	protected void resumeGame()
	{
		if (state == PLAY) paused = true;
		levelStarted = true;

		if (oldBricks != null)
		{
			bricks = oldBricks;
		}

				   screen.repaint();
				   screen.serviceRepaints();
		   }
   }