herosprite.java

Java j2me写的一款手机飞行游戏

import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.Sprite;
//Download by http://www.codefans.net
public class HeroSprite extends Sprite implements IData {
	int aup[]={12,12,13,13,14,14,15};
	int adown[]={0,1,2,3};
	int aleft[]={4,4,5,5,6,6,7,7};
	int aright[]={8,9,10,11};
	
	int mDir=0;
	int mSpeed=5;
	
	int mLastD=0;
	
	static Image mImgBullet;
	static int mBulletW;
	static int mBulletH;
	


	public HeroSprite(Image img, int w, int h) {
		super(img, w, h);
	}
	
	public void moveto(int dir){
		switch(dir){
			case UP:
				if(dir!=mDir)
					setFrameSequence(aup);
				move(0,-mSpeed);
				break;
			case DOWN:
				if(dir!=mDir)
				setFrameSequence(new int[]{0,1,2,3});
				move(0,mSpeed);
				break;
			case LEFT:
				if(dir!=mDir)
				setFrameSequence(aleft);
				move(-mSpeed,0);
				break;
			case RIGHT:
				if(dir!=mDir)
				setFrameSequence(aright);
				move(mSpeed,0);
				break;
		}
		mDir=dir;
		
		mLastD=mSpeed;

		nextFrame();
	}
	
	public void undo(){
		switch(mDir){
			case UP:
				move(0,mLastD);
				break;
			case DOWN:
				move(0,-mLastD);
				break;
			case LEFT:
				move(mLastD,0);
				break;
			case RIGHT:
				move(-mLastD,0);
				break;
		}
		mLastD=0;
	}
	
	public Bullet fire(){
		Bullet b=new Bullet(mImgBullet,mBulletW,mBulletH);
		int bx=0,by=0;
		switch(mDir){
			case UP:
				bx=getWidth()/2;
				by=0;
				break;
			case DOWN:
				bx=getWidth()/2;
				by=getHeight();
				break;
			case LEFT:
				bx=0;
				by=getHeight()/2;
				break;
			case RIGHT:
				bx=getWidth();
				by=getHeight()/2;
		}
		bx+=getX();
		by+=getY();
		b.setBullet(bx, by, mDir);
		return b;
		
		
		
	}

}