pacman.java

JAVA编写的吃豆子小游戏

        }
        if (count==0)
        {
          if ((screendata[pos]&15)==15)
          {
            ghostdx[i]=0;
            ghostdy[i]=0;
          }
          else
          {
            ghostdx[i]=-ghostdx[i];
            ghostdy[i]=-ghostdy[i];
          }
        }
        else
        {
          count=(int)(Math.random()*count);
          if (count>3) count=3;
          ghostdx[i]=dx[count];
          ghostdy[i]=dy[count];
        }
      }
      ghostx[i]=ghostx[i]+(ghostdx[i]*ghostspeed[i]);
      ghosty[i]=ghosty[i]+(ghostdy[i]*ghostspeed[i]);
      DrawGhost(ghostx[i]+1,ghosty[i]+1);

      if (pacmanx>(ghostx[i]-12) && pacmanx<(ghostx[i]+12) &&
          pacmany>(ghosty[i]-12) && pacmany<(ghosty[i]+12) && ingame)
      {
        if (scared)
        {
          score+=10;
          ghostx[i]=7*blocksize;
          ghosty[i]=7*blocksize;
        }
        else
        {
          dying=true;
          deathcounter=64;
        }
      }
    }
  }


  public void DrawGhost(int x, int y)
  {
    if (ghostanimpos==0 && !scared)
    {
      goff.drawImage(ghost1,x,y,this);
    }
    else if (ghostanimpos==1 && !scared)
    {
      goff.drawImage(ghost2,x,y,this);
    }
    else if (ghostanimpos==0 && scared)
    {
      goff.drawImage(ghostscared1,x,y,this);
    }
    else if (ghostanimpos==1 && scared)
    {
      goff.drawImage(ghostscared2,x,y,this);
    }
  }


  public void MovePacMan()
  {
    int     pos;
    short   ch;

    if (reqdx==-pacmandx && reqdy==-pacmandy)
    {
      pacmandx=reqdx;
      pacmandy=reqdy;
      viewdx=pacmandx;
      viewdy=pacmandy;
    }
    if (pacmanx%blocksize==0 && pacmany%blocksize==0)
    {
      pos=pacmanx/blocksize+nrofblocks*(int)(pacmany/blocksize);
      ch=screendata[pos];
      if ((ch&16)!=0)
      {
        screendata[pos]=(short)(ch&15);
        score++;
      }
      if ((ch&32)!=0)
      {
        scared=true;
        scaredcount=scaredtime;
        screendata[pos]=(short)(ch&15);
        score+=5;
      }

      if (reqdx!=0 || reqdy!=0)
      {
        if (!( (reqdx==-1 && reqdy==0 && (ch&1)!=0) ||
           (reqdx==1 && reqdy==0 && (ch&4)!=0) ||
           (reqdx==0 && reqdy==-1 && (ch&2)!=0) ||
           (reqdx==0 && reqdy==1 && (ch&8)!=0)))
        {
          pacmandx=reqdx;
          pacmandy=reqdy;
          viewdx=pacmandx;
          viewdy=pacmandy;
        }
      }
 
      // Check for standstill
      if ( (pacmandx==-1 && pacmandy==0 && (ch&1)!=0) ||
           (pacmandx==1 && pacmandy==0 && (ch&4)!=0) ||
           (pacmandx==0 && pacmandy==-1 && (ch&2)!=0) ||
           (pacmandx==0 && pacmandy==1 && (ch&8)!=0))
      {
        pacmandx=0;
        pacmandy=0;
      }
    }
    pacmanx=pacmanx+pacmanspeed*pacmandx;
    pacmany=pacmany+pacmanspeed*pacmandy;
  }


  public void DrawPacMan()
  {
    if (viewdx==-1)
      DrawPacManLeft();
    else if (viewdx==1)
      DrawPacManRight();
    else if (viewdy==-1)
      DrawPacManUp();
    else
      DrawPacManDown();
  }

  public void DrawPacManUp()
  {
    switch(pacmananimpos)
    {
      case 1:
        goff.drawImage(pacman2up,pacmanx+1,pacmany+1,this);
        break;
      case 2:
        goff.drawImage(pacman3up,pacmanx+1,pacmany+1,this);
        break;
      case 3:
        goff.drawImage(pacman4up,pacmanx+1,pacmany+1,this);
        break;
      default:
        goff.drawImage(pacman1,pacmanx+1,pacmany+1,this);
        break;
    }
  }


  public void DrawPacManDown()
  {
    switch(pacmananimpos)
    {
      case 1:
        goff.drawImage(pacman2down,pacmanx+1,pacmany+1,this);
        break;
      case 2:
        goff.drawImage(pacman3down,pacmanx+1,pacmany+1,this);
        break;
      case 3:
        goff.drawImage(pacman4down,pacmanx+1,pacmany+1,this);
        break;
      default:
        goff.drawImage(pacman1,pacmanx+1,pacmany+1,this);
        break;
    }
  }


  public void DrawPacManLeft()
  {
    switch(pacmananimpos)
    {
      case 1:
        goff.drawImage(pacman2left,pacmanx+1,pacmany+1,this);
        break;
      case 2:
        goff.drawImage(pacman3left,pacmanx+1,pacmany+1,this);
        break;
      case 3:
        goff.drawImage(pacman4left,pacmanx+1,pacmany+1,this);
        break;
      default:
        goff.drawImage(pacman1,pacmanx+1,pacmany+1,this);
        break;
    }
  }


  public void DrawPacManRight()
  {
    switch(pacmananimpos)
    {
      case 1:
        goff.drawImage(pacman2right,pacmanx+1,pacmany+1,this);
        break;
      case 2:
        goff.drawImage(pacman3right,pacmanx+1,pacmany+1,this);
        break;
      case 3:
        goff.drawImage(pacman4right,pacmanx+1,pacmany+1,this);
        break;
      default:
        goff.drawImage(pacman1,pacmanx+1,pacmany+1,this);
        break;
    }
  }


  public void DrawMaze()
  {
    short i=0;
    int x,y;

    bigdotcolor=bigdotcolor+dbigdotcolor;
    if (bigdotcolor<=64 || bigdotcolor>=192)
      dbigdotcolor=-dbigdotcolor;

    for (y=0; y<scrsize; y+=blocksize)
    {
      for (x=0; x<scrsize; x+=blocksize)
      {
	goff.setColor(mazecolor);
        if ((screendata[i]&1)!=0)
	{
           goff.drawLine(x,y,x,y+blocksize-1);
	}
	if ((screendata[i]&2)!=0)
	{
          goff.drawLine(x,y,x+blocksize-1,y);
	}
	if ((screendata[i]&4)!=0)
	{
          goff.drawLine(x+blocksize-1,y,x+blocksize-1,y+blocksize-1);
	}
	if ((screendata[i]&8)!=0)
	{
          goff.drawLine(x,y+blocksize-1,x+blocksize-1,y+blocksize-1);
	}
	if ((screendata[i]&16)!=0)
	{
          goff.setColor(dotcolor);
          goff.fillRect(x+11,y+11,2,2);
	}
	if ((screendata[i]&32)!=0)
	{
          goff.setColor(new Color(224,224-bigdotcolor,bigdotcolor));
          goff.fillRect(x+8,y+8,8,8);
	}
	i++;
      }
    }
  }

  public void ShowIntroScreen()
  {
    String s;

    goff.setFont(largefont);

    goff.setColor(new Color(0,32,48));
    goff.fillRect(16, scrsize/2 - 40, scrsize-32,80);
    goff.setColor(Color.white);
    goff.drawRect(16, scrsize/2 - 40, scrsize-32,80);

    if (showtitle)
    {
      s="Java PacMan";
      scared=false;

      goff.setColor(Color.white);
      goff.drawString(s,(scrsize-fmlarge.stringWidth(s)) / 2 +2, scrsize/2 - 20 +2);
      goff.setColor(new Color(96,128,255));
      goff.drawString(s,(scrsize-fmlarge.stringWidth(s)) / 2, scrsize/2 - 20);

      s="(c)2000 by Brian Postma";
      goff.setFont(smallfont);
      goff.setColor(new Color(255,160,64));
      goff.drawString(s,(scrsize-fmsmall.stringWidth(s))/2,scrsize/2 + 10);

      s="[e-mail]";
      goff.setColor(new Color(255,160,64));
      goff.drawString(s,(scrsize-fmsmall.stringWidth(s))/2,scrsize/2 + 30);
    }
    else
    {
      goff.setFont(smallfont);
      goff.setColor(new Color(96,128,255));
      s="'S' to start game";
      goff.drawString(s,(scrsize-fmsmall.stringWidth(s))/2,scrsize/2 - 10);
      goff.setColor(new Color(255,160,64));
      s="Use cursor keys to move";
      goff.drawString(s,(scrsize-fmsmall.stringWidth(s))/2,scrsize/2 + 20);
      scared=true;
    }
    count--;
    if (count<=0)
    { count=screendelay; showtitle=!showtitle; }
  }


  public void DrawScore()
  {
    int i;
    String s;

    goff.setFont(smallfont);
    goff.setColor(new Color(96,128,255));
    s="Score: "+score;
    goff.drawString(s,scrsize/2+96,scrsize+16);
    for (i=0; i<pacsleft; i++)
    {
      goff.drawImage(pacman3left,i*28+8,scrsize+1,this);
    }
  }


  public void CheckScared()
  {
    scaredcount--;
    if (scaredcount<=0)
      scared=false;

    if (scared && scaredcount>=30)
      mazecolor=new Color(192,32,255);
    else
      mazecolor=new Color(32,192,255);

    if (scared)
    {
      screendata[7*nrofblocks+6]=11;
      screendata[7*nrofblocks+8]=14;
    }
    else
    {
      screendata[7*nrofblocks+6]=10;
      screendata[7*nrofblocks+8]=10;
    }
  }


  public void CheckMaze()
  {
    short i=0;
    boolean finished=true;

    while (i<nrofblocks*nrofblocks && finished)
    {
      if ((screendata[i]&48)!=0)
        finished=false;
      i++;
    }
    if (finished)
    {
      score+=50;
      DrawScore();
      try
      { 
        Thread.sleep(3000);
      }
      catch (InterruptedException e)
      {
      }
      if (nrofghosts < maxghosts)
        nrofghosts++; 
      if (currentspeed<maxspeed)
        currentspeed++;
      scaredtime=scaredtime-20;
      if (scaredtime<minscaredtime)
        scaredtime=minscaredtime;
      LevelInit();
    }
  }


  public void run()
  {
    long  starttime;
    Graphics g;

    Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
    g=getGraphics();

    while(true)
    {
      starttime=System.currentTimeMillis();
      try
      {
        paint(g);
        starttime += 40;
        Thread.sleep(Math.max(0, starttime-System.currentTimeMillis()));
      }
      catch (InterruptedException e)
      {
        break;
      }
    }
  }

  public void start()
  {
    if (thethread == null) {
      thethread = new Thread(this);
      thethread.start();
    }
  }

  public void stop()
  {
    if (thethread != null) {
      thethread.stop();
      thethread = null;
    }
  }
}