enemytank.java

欢迎使用蓝牙联网坦克大战

package newpackagetank;
import java.util.Random;

import javax.microedition.lcdui.Image;

//敌方坦克
public class EnemyTank extends TankSprite
{
	private Random m_Random;
	EnemyTank(Image image, int frameWidth, int frameHeight) 
	{
		super(image, frameWidth, frameHeight);
		m_Random = new Random();
	}
	//逻辑操作，控制坦克自动移动及发射炮弹
	public void Logic()
	{
		super.Logic();
		if( !isVisible() )
			return;
		switch( m_nDir ){
		case 0:
			Move( 0, -m_nSpeed );
			break;
		case 1:
			Move( m_nSpeed, 0 );
			break;
		case 2:
			Move( 0, m_nSpeed );
			break;
		default:
			Move( -m_nSpeed, 0 );
			break;
		}		
		//以20分之1的概率发射炮弹
		int nRs = m_Random.nextInt() % 20;
		if( Math.abs(nRs) == 0 )
                
                    CreateBullet();
                                    
	}
        
        public void LogicClient(int dir)
	{
		super.Logic();
		if( !isVisible() )
			return;
		switch( dir ){
		case 0:
                        setTransform(TRANS_NONE);
			MoveClient( 0, -m_nSpeed );
			break;
		case 1:
                        setTransform(TRANS_ROT90);
			MoveClient( m_nSpeed, 0 );
			break;
		case 2:
                        setTransform(TRANS_ROT180);
			MoveClient( 0, m_nSpeed );
			break;
		default:
                        setTransform(TRANS_MIRROR_ROT270);
			MoveClient( -m_nSpeed, 0 );
			break;
		}		
		
	}
        
        
        
        public void Logic(MainCanvas canvas, int number)
	{
		super.Logic();
		if( !isVisible() )
			return;
                
                canvas.sendEnemyMessage(m_nDir,number);
		switch( m_nDir ){
		case 0:
			Move( 0, -m_nSpeed );
			break;
		case 1:
			Move( m_nSpeed, 0 );
			break;
		case 2:
			Move( 0, m_nSpeed );
			break;
		default:
			Move( -m_nSpeed, 0 );
			break;
		}		
		//以20分之1的概率发射炮弹
		int nRs = m_Random.nextInt() % 20;
		if( Math.abs(nRs) == 0 )
                {
                    
                     canvas.shootEnemyBullet(m_nDir,number);
                    
                     CreateBullet();
                    
                   
                }
	}
	//移动坦克，参数nX、nY分别是移动的X、Y方向的距离
	public void Move(int nX, int nY) 
	{
		super.Move(nX, nY);	
		RandomDir();
	}
        
        public void MoveClient(int nX, int nY) 
	{
		super.Move(nX, nY);	
		
	}
	//随机改变方向
	private void RandomDir()
	{
		
		//以20分之1的概率改变方向

           
		int nRs = m_Random.nextInt() % 50;
		if( Math.abs(nRs) != 0 )
			return;
		int nDir = Math.abs(m_Random.nextInt()%500);
                if(nDir>=0 && nDir <=49)
                    SetDir( 0 );
                 if(nDir>=50 && nDir <=249)
                    SetDir( 1 );
                 if(nDir>=250 && nDir <=399)
                    SetDir( 3 );
                 if(nDir>=400 && nDir <=499)
                    SetDir( 2 );
	}
}