Java来做马里奥[2]—食不厌精

效果图如下：


孔丘仲尼先生曾经曰过“斋必变食,居必迁坐。食不厌精,脍不厌细”，被捧上天的圣人尚且如此，游戏中的角色更不例外，在ACT游戏中举凡加分、恢复体力、发动必杀技种种，都离不开“食物”的伟大功绩。

我们大家都知道，在典型的平面2D ACT游戏中，是使用层级的概念来描绘整个画面的，最底层的背景一般不参与游戏进程，而由再上一级的前景来承载角色及限制角色活动区域。所有置于前景之上的本质上都是活动精灵，只是扮演的角色不同，才会发生不同的作用与效果。

比如，在本例中我将Sprite抽象出来，而由Role及Food分别继承，他们的命运就变成了吃与被吃的关系……

代码如下：

Sprite.java

packageorg.test.mario;

importjava.awt.Graphics;
importjava.awt.Image;
importjava.awt.Rectangle;

importorg.loon.framework.game.image.Bitmap;

/***//**
*<p>
*Title:LoonFramework
*</p>
*<p>
*Description:精灵类（为了批量制造角色，将Role中通用设定抽象成此类）
*</p>
*<p>
*Copyright:Copyright(c)2008
*</p>
*<p>
*Company:LoonFramework
*</p>
*<p>
*License:http://www.apache.org/licenses/LICENSE-2.0
*</p>
*
*@authorchenpeng
*@email：ceponline@yahoo.com.cn
*@version0.1
*/
publicabstractclassSprite...{
//坐标
protecteddouble_x;

protecteddouble_y;

//宽
protectedintwidth;

//高
protectedintheight;

//图像
protectedImage_image;

//步数
protectedint_count;

//地图
protectedMap_map;

/***//**
*构造函数，以角色图位置，初始的x、y坐标，地图四项参数创建一个可用的角色
*
*@paramfileName
*@param_x
*@param_y
*@parammap
*/
publicSprite(StringfileName,double_x,double_y,Mapmap)...{
this._x=_x;
this._y=_y;
this._map=map;

width=32;
height=32;

loadImage(fileName);

_count=0;

AnimationThreadthread=newAnimationThread();
thread.start();
}

publicabstractvoidupdate();

publicvoiddraw(Graphicsg,intoffsetX,intoffsetY)...{
g.drawImage(_image,(int)_x+offsetX,(int)_y+offsetY,(int)_x
+offsetX+width,(int)_y+offsetY+height,_count*width,
0,_count*width+width,height,null);
}

publicbooleanisHit(Spritesprite)...{
RectangleplayerRect=newRectangle((int)_x,(int)_y,width,height);
RectanglespriteRect=newRectangle((int)sprite.getX(),(int)sprite
.getY(),sprite.getWidth(),sprite.getHeight());
//判定两者边框是否相交
if(playerRect.intersects(spriteRect))...{
returntrue;
}

returnfalse;
}

publicdoublegetX()...{
return_x;
}

publicdoublegetY()...{
return_y;
}

publicintgetWidth()...{
returnwidth;
}

publicintgetHeight()...{
returnheight;
}

privatevoidloadImage(Stringfilename)...{
_image=newBitmap(filename).getImage();
}

privateclassAnimationThreadextendsThread...{
publicvoidrun()...{
while(true)...{
//换算步数
if(_count==0)...{
_count=1;
}elseif(_count==1)...{
_count=0;
}
//动作更替延迟
try...{
Thread.sleep(300);
}catch(InterruptedExceptione)...{
e.printStackTrace();
}
}
}
}

}

Food.java

packageorg.test.mario;

/***//**
*<p>
*Title:LoonFramework
*</p>
*<p>
*Description:兵粮丸
*</p>
*<p>
*Copyright:Copyright(c)2008
*</p>
*<p>
*Company:LoonFramework
*</p>
*<p>
*License:http://www.apache.org/licenses/LICENSE-2.0
*</p>
*
*@authorchenpeng
*@email：ceponline@yahoo.com.cn
*@version0.1
*/
publicclassFoodextendsSprite...{

publicFood(StringfileName,doublex,doubley,Mapmap)...{
super(fileName,x,y,map);
}

publicvoidupdate()...{

}

}

Role.java

packageorg.test.mario;

importjava.awt.Graphics;
importjava.awt.Point;


/***//**
*<p>
*Title:LoonFramework
*</p>
*<p>
*Description:角色描述及绘制用类
*</p>
*<p>
*Copyright:Copyright(c)2008
*</p>
*<p>
*Company:LoonFramework
*</p>
*
*@authorchenpeng
*@email：ceponline@yahoo.com.cn
*@version0.1
*/
publicclassRoleextendsSprite...{



privatedouble_vx;

privatedouble_vy;

privatebooleanisFlat;

privateint_dir;

finalstaticpublicintWIDTH=40;

finalstaticpublicintHEIGHT=40;

finalstaticprivateintSPEED=6;

finalstaticprivateintJUMP_SPEED=16;

finalstaticprivateintRIGHT=0;

finalstaticprivateintLEFT=1;

/***//**
*构造函数，以角色图位置，初始的x、y坐标，地图四项参数创建一个可用的角色
*
*@paramfilename
*@paramx
*@paramy
*@parammap
*/
publicRole(Stringfilename,doublex,doubley,Mapmap)...{
super(filename,x,y,map);
_vx=0;
_vy=0;
isFlat=false;
_dir=RIGHT;
}

publicvoidstop()...{
_vx=0;
}

publicvoidleft()...{
_vx=-SPEED;
_dir=LEFT;
}

publicvoidright()...{
_vx=SPEED;
_dir=RIGHT;
}

publicvoidjump()...{
if(isFlat)...{
_vy=-JUMP_SPEED;
isFlat=false;
}
}

publicvoidupdate()...{
//0.6为允许跳跃的高度限制，反值效果
_vy+=0.6;

doublenewX=_x+_vx;

Pointtile=_map.getTileHit(this,newX,_y);
if(tile==null)...{
_x=newX;
}else...{
if(_vx>0)...{
_x=Map.tilesToPixels(tile.x)-WIDTH;
}elseif(_vx<0)...{
_x=Map.tilesToPixels(tile.x+1);
}
_vx=0;
}

doublenewY=_y+_vy;
tile=_map.getTileHit(this,_x,newY);
if(tile==null)...{
_y=newY;
isFlat=false;
}else...{
if(_vy>0)...{
_y=Map.tilesToPixels(tile.y)-HEIGHT;
_vy=0;
isFlat=true;
}elseif(_vy<0)...{
_y=Map.tilesToPixels(tile.y+1);
_vy=0;
}
}
}

publicvoiddraw(Graphicsg,intoffsetX,intoffsetY)...{
g.drawImage(_image,(int)_x+offsetX,(int)_y+offsetY,(int)_x
+offsetX+WIDTH,(int)_y+offsetY+HEIGHT,_count*WIDTH,
_dir*HEIGHT,_count*WIDTH+WIDTH,_dir*HEIGHT+HEIGHT,
null);
}
}

Map.java

packageorg.test.mario;

importjava.awt.Graphics;
importjava.awt.Image;
importjava.awt.Point;
importjava.util.LinkedList;

importorg.loon.framework.game.image.Bitmap;

/***//**
*<p>
*Title:LoonFramework
*</p>
*<p>
*Description:地图绘制及描述用类
*</p>
*<p>
*Copyright:Copyright(c)2008
*</p>
*<p>
*Company:LoonFramework
*</p>
*
*@authorchenpeng
*@email：ceponline@yahoo.com.cn
*@version0.1
*/
publicclassMap...{

//在以前的blog文章中我介绍过，游戏开发中通常以数组描述地图
//此处1描绘为一个障碍物，0描绘为一个可通行空间
finalstaticpublicintTILE_SIZE=32;

finalstaticpublicintROW=20;

finalstaticpublicintCOL=30;

finalstaticpublicintWIDTH=TILE_SIZE*COL;

finalstaticpublicintHEIGHT=TILE_SIZE*ROW;

finalstaticpublicdoubleGRAVITY=0.6;

//缓存精灵的list
privateLinkedListsprites;

//地图描述
finalstaticprivateint[][]map=...{
...{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,2},
...{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,1},
...{2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,1},
...{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,1},
...{1,3,3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,
2,2,2,2,2,2,2,1},
...{1,2,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
0,0,0,0,0,0,0,1},
...{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
0,0,0,0,0,0,0,1},
...{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
0,0,0,0,0,0,0,1},
...{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,3,0,
0,0,0,0,0,0,0,1},
...{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,0,
0,0,0,0,0,0,0,1},
...{1,0,0,0,0,0,2,2,2,2,2,2,2,2,0,0,0,0,0,1,0,0,
0,0,0,0,0,0,0,1},
...{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
0,0,0,0,0,0,0,1},
...{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
0,0,0,0,0,0,0,1},
...{1,3,3,3,3,3,0,0,0,0,0,0,0,0,3,3,3,3,3,1,2,2,
0,0,0,0,0,0,3,1},
...{1,2,2,2,2,2,0,0,0,0,0,0,0,0,2,2,2,2,2,1,0,0,
0,0,0,0,0,0,2,1},
...{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
0,0,0,0,0,0,0,1},
...{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
0,0,0,0,0,0,0,1},
...{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,1},
...{1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,1},
...{1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
2,2,2,2,2,2,2,1}};


finalstaticprivateImagetile=newBitmap("./tile_0.gif").getImage();

finalstaticprivateImagetile2=newBitmap("./tile_1.gif").getImage();

/***//**
*构造函数
*
*/
publicMap()...{
//精灵list
sprites=newLinkedList();
//注入兵粮丸
for(inti=0;i<ROW;i++)...{
for(intj=0;j<COL;j++)...{
switch(map[i][j])...{
case3:
sprites.add(newFood("./food.gif",tilesToPixels(j),tilesToPixels(i),this));
break;
}
}
}
}

publicvoiddraw(Graphicsg,intoffsetX,intoffsetY)...{
intfirstTileX=pixelsToTiles(-offsetX);
intlastTileX=firstTileX+pixelsToTiles(Main._WIDTH)+1;
lastTileX=Math.min(lastTileX,COL);
intfirstTileY=pixelsToTiles(-offsetY);
intlastTileY=firstTileY+pixelsToTiles(Main._HEIGHT)+1;
lastTileY=Math.min(lastTileY,ROW);

for(inti=firstTileY;i<lastTileY;i++)...{
for(intj=firstTileX;j<lastTileX;j++)...{
//转换map标识
switch(map[i][j])...{
case1://绘制砖地

g.drawImage(tile,tilesToPixels(j)+offsetX,
tilesToPixels(i)+offsetY,null);
break;
case2://绘制草地
g.drawImage(tile2,tilesToPixels(j)+offsetX,
tilesToPixels(i)+offsetY,null);
break;

}
}
}
}

/***//**
*换算角色与地板的撞击，并返回Point用以描述新的x,y
*
*@paramplayer
*@paramnewX
*@paramnewY
*@return
*/
publicPointgetTileHit(Roleplayer,doublenewX,doublenewY)...{

newX=Math.ceil(newX);
newY=Math.ceil(newY);

doublefromX=Math.min(player.getX(),newX);
doublefromY=Math.min(player.getY(),newY);
doubletoX=Math.max(player.getX(),newX);
doubletoY=Math.max(player.getY(),newY);

intfromTileX=pixelsToTiles(fromX);
intfromTileY=pixelsToTiles(fromY);
inttoTileX=pixelsToTiles(toX+Role.WIDTH-1);
inttoTileY=pixelsToTiles(toY+Role.HEIGHT-1);

for(intx=fromTileX;x<=toTileX;x++)...{
for(inty=fromTileY;y<=toTileY;y++)...{

if(x<0||x>=COL)...{
returnnewPoint(x,y);
}
if(y<0||y>=ROW)...{
returnnewPoint(x,y);
}
if(map[y][x]==1||map[y][x]==2)...{
returnnewPoint(x,y);
}
}
}

returnnull;
}

/***//**
*将Tiles转为Pixels
*
*@parampixels
*@return
*/
publicstaticintpixelsToTiles(doublepixels)...{
return(int)Math.floor(pixels/TILE_SIZE);
}

/***//**
*将Pixels转为Tiles
*
*@parampixels
*@return
*/
publicstaticinttilesToPixels(inttiles)...{
returntiles*TILE_SIZE;
}

/***//**
*返回Spritelist
*@return
*/
publicLinkedListgetSprites()...{
returnsprites;
}

publicvoidsetSprites(LinkedListsprites)...{
this.sprites=sprites;
}
}

Main.java

packageorg.test.mario;

importjava.awt.Color;
importjava.awt.Frame;
importjava.awt.Graphics;
importjava.awt.Image;
importjava.awt.Panel;
importjava.awt.event.KeyEvent;
importjava.awt.event.KeyListener;
importjava.awt.event.WindowAdapter;
importjava.awt.event.WindowEvent;
importjava.util.Iterator;
importjava.util.LinkedList;

importorg.loon.framework.game.image.Bitmap;

/***//**
*<p>
*Title:LoonFramework
*</p>
*<p>
*Description:
*</p>
*<p>
*Copyright:Copyright(c)2008
*</p>
*<p>
*Company:LoonFramework
*</p>
*
*@authorchenpeng
*@email：ceponline@yahoo.com.cn
*@version0.1
*/
publicclassMainextendsPanelimplementsRunnable,KeyListener...{

/***//**
*
*/
privatestaticfinallongserialVersionUID=1L;

publicstaticfinalint_WIDTH=640;

publicstaticfinalint_HEIGHT=480;

privateMap_map;

privateRole_role;

privateThread_sleep;

privateImage_screen=null;

privateGraphics_graphics=null;

//方向控制，由于是自然落体所以没有down
privatebooleanLEFT;

privatebooleanRIGHT;

privatebooleanUP;

//底层背景
finalstaticprivateImageback=newBitmap("./雕像.png").getImage();

publicMain()...{
setSize(_WIDTH,_HEIGHT);
setFocusable(true);
_screen=newBitmap(_WIDTH,_HEIGHT).getImage();
_graphics=_screen.getGraphics();
_map=newMap();
//设置扮演的角色
_role=newRole("role.gif",190,40,_map);

//监听窗体
addKeyListener(this);

//启动线程
_sleep=newThread(this);
_sleep.start();
}

/***//**
*运行
*/
publicvoidrun()...{
while(true)...{
//改变方向
if(LEFT)...{
_role.left();
}elseif(RIGHT)...{
_role.right();
}else...{
_role.stop();
}
if(UP)...{
_role.jump();
}
_role.update();

LinkedListsprites=_map.getSprites();

for(Iteratorit=sprites.iterator();it.hasNext();)...{
//还原为sprite
Spritesprite=(Sprite)it.next();
//变更精灵状态
sprite.update();

//碰撞检测
if(_role.isHit(sprite))...{
//对象检测，为兵粮丸时
if(spriteinstanceofFood)...{
Foodcoin=(Food)sprite;
//删除对象
//it.remove();
sprites.remove(coin);
break;
}
}
}

repaint();
try...{
Thread.sleep(20);
}catch(InterruptedExceptione)...{
e.printStackTrace();
}
}
}

publicvoidupdate(Graphicsg)...{
paint(g);
}

publicvoidpaint(Graphicsg)...{

_graphics.setColor(Color.BLACK);
_graphics.fillRect(0,0,_WIDTH,_HEIGHT);
_graphics.drawImage(back,0,0,this);
intoffsetX=_WIDTH/2-(int)_role.getX();

offsetX=Math.min(offsetX,0);
offsetX=Math.max(offsetX,_WIDTH-Map.WIDTH);

intoffsetY=_HEIGHT/2-(int)_role.getY();

offsetY=Math.min(offsetY,0);
offsetY=Math.max(offsetY,_HEIGHT-Map.HEIGHT);

_map.draw(_graphics,offsetX,offsetY);

_role.draw(_graphics,offsetX,offsetY);
//遍历精灵对象并绘制
LinkedListsprites=_map.getSprites();

for(Iteratorit=sprites.iterator();it.hasNext();)...{
Spritesprite=(Sprite)it.next();
sprite.draw(_graphics,offsetX,offsetY);
}
g.drawImage(_screen,0,0,null);
}

publicvoidkeyPressed(KeyEvente)...{
intkey=e.getKeyCode();
if(key==KeyEvent.VK_LEFT)...{
LEFT=true;
}
if(key==KeyEvent.VK_RIGHT)...{
RIGHT=true;
}
if(key==KeyEvent.VK_UP)...{
UP=true;
}
}

publicvoidkeyReleased(KeyEvente)...{
intkey=e.getKeyCode();
if(key==KeyEvent.VK_LEFT)...{
LEFT=false;
}
if(key==KeyEvent.VK_RIGHT)...{
RIGHT=false;
}
if(key==KeyEvent.VK_UP)...{
UP=false;
}
}

publicvoidkeyTyped(KeyEvente)...{
}

publicstaticvoidmain(String[]args)...{
Frameframe=newFrame();
frame.setTitle("Java来做马里奥（3）—食不厌精");
frame.setSize(_WIDTH,_HEIGHT+20);
frame.setResizable(false);
frame.setLocationRelativeTo(null);
frame.add(newMain());
frame.setVisible(true);
frame.addWindowListener(newWindowAdapter()...{
publicvoidwindowClosing(WindowEvente)...{
System.exit(0);
}
});
}

}