www.pudn.com > j2me_Mario.rar > MarioBullet.java

/** 
 * 
Title: Mario
 
 * 
Description: 
 * You cannot remove this copyright and notice. 
 * You cannot use this file any part without the express permission of the author. 
 * All Rights Reserved
 
 * 
Copyright: lizhenpeng (c) 2004
 
 * 
Company: LP&P
 
 * @author lizhenpeng 
 * @version 1.0.0 
 */ 
 
package mario; 
 
 
import lipeng.LPSprite; 
import lipeng.LPRect; 
import java.io.DataInputStream; 
import java.io.DataOutputStream; 
import java.io.IOException; 
 
 
public class MarioBullet 
  extends LPSprite 
{ 
  protected MarioGameManage gm; 
  private LPRect rect1=new LPRect(); 
  private LPRect rect2=new LPRect(); 
  protected int xSpeed; 
  protected int ySpeed; 
  protected int dy; 
  public void writeData(DataOutputStream dos) throws IOException 
  { 
    super.writeData(dos); 
    dos.writeInt(xSpeed); 
    dos.writeInt(ySpeed); 
    dos.writeInt(dy); 
  } 
  public void readData(DataInputStream dis) throws IOException 
  { 
    super.readData(dis); 
    xSpeed = dis.readInt(); 
    ySpeed = dis.readInt(); 
    dy = dis.readInt(); 
  } 
 
  public MarioBullet(MarioGameManage gm) 
  { 
    isHidden=true; 
    rect1.dx = 8; 
    rect1.dy = 8; 
    rect2.dx = 16; 
    rect2.dy = 16; 
    this.gm = gm; 
  } 
 
  public void initBullet(int x,int y,int xSpeed,int ySpeed) 
  { 
    this.x=x; 
    this.y=y; 
    this.frameCnt=2; 
    this.isHidden=false; 
    this.xSpeed=xSpeed; 
    this.ySpeed=ySpeed; 
  } 
 
  // protected void 
  protected boolean checkTileCollisionHorn() 
  { 
    int i; 
    rect1.x=x+gm.mainSprite.judgeMap.x+xSpeed; 
    rect1.y=y+gm.mainSprite.judgeMap.y; 
 
    i=(x+gm.mainSprite.judgeMap.x+xSpeed+4)/gm.mainSprite.judgeMap.tileSize; 
 
    if(i<0||i>gm.mainSprite.judgeMap.w-1) 
      return false; 
    int yTile1=(y+gm.mainSprite.judgeMap.y)/gm.mainSprite.judgeMap.tileSize; 
    if(yTile1<0||yTile1>gm.mainSprite.judgeMap.h-1) 
      return false; 
    if(((gm.mainSprite.judgeMap.mapArray[yTile1][i]>>8)&0x04)==0x04) 
    { 
      rect2.x=i*16; 
      rect2.y=yTile1*16; 
      if(LPRect.IntersectRect(rect1,rect2)) 
      { 
        isHidden = true; 
        return true; 
      } 
    } 
    return false; 
  } 
 
  protected void checkTileCollisionVert() 
  { 
    if(this.dy>=0) 
    { 
      for(int i=(y+gm.mainSprite.judgeMap.y)/ 
          gm.mainSprite.judgeMap.tileSize; 
          i<=(y+gm.mainSprite.judgeMap.y+dy)/gm.mainSprite.judgeMap.tileSize;i++) 
      { 
        if(i<0||i>gm.mainSprite.judgeMap.h-1) 
        { 
          continue; 
        } 
        int xTile1=(x+gm.mainSprite.judgeMap.x+4)/ 
          gm.mainSprite.judgeMap.tileSize; 
        if(xTile1>gm.mainSprite.judgeMap.w-1||xTile1<0) 
        { 
          return; 
        } 
        if(((gm.mainSprite.judgeMap.mapArray[i][xTile1]>>8)&0x02)== 
           0x02) 
        { 
          dy=-8; 
          return; 
        } 
      } 
    } 
  } 
 
  protected void checkSpriteCollisionVert() 
  { 
    if(dy>=0) 
    { 
      int i; 
      switch(gm.gameState) 
      { 
        case MarioGameManage.GAMESTATE_GAMELOOP: 
          for(i=gm.brick.length-1;i>=0;--i) 
          { 
            if(!gm.brick[i].isHidden) 
            { 
              if(((y+8)<=gm.brick[i].y)&& 
                 ((y+dy+8)>=gm.brick[i].y) 
                 &&(x>=gm.brick[i].x-2)&&(x<=gm.brick[i].x+14)) 
              { 
                //dy=gm.brick[i].y-(y+16); 
                dy = -8; 
                return; 
              } 
            } 
          } 
          break; 
      } 
    } 
  } 
 
  public void action() 
  { 
    if(isHidden) 
    { 
      return; 
    } 
    if(x>gm.canvas.width||x<-32 
       ||y>gm.canvas.height||y<-32) 
    { 
      isHidden=true; 
      return; 
    } 
    dy+=4; 
    checkSpriteCollisionVert(); 
    checkTileCollisionVert(); 
    y+=dy; 
    if(!checkTileCollisionHorn()) 
    { 
      x+=xSpeed; 
    } 
    ++frameCnt; 
    if(frameCnt<2||frameCnt>5) 
    { 
      frameCnt=2; 
    } 
  } 
}