planesprite.java

J2ME编程的50个例子,适合掌上系统的编程

package demo;
import java.io.IOException;

import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.Sprite;

public class PlaneSprite extends Sprite{
	protected int				m_nSpeedX = 0;			//飞机X方向的移动速率
	protected int				m_nSpeedY = 0;			//飞机Y方向的移动速率
	public MissileSprite 		m_Missile = null;
	public PlaneSprite(Image img, int nWidth, int nHeight ) {
		super(img, nWidth, nHeight);
		try{
			Image BImg = Image.createImage( "/demo/missile.png");
			m_Missile = new MissileSprite( BImg, 5, 5 );
		}
		catch (IOException e){}
		setVisible( false );
		defineReferencePixel( nWidth / 2, nHeight / 2);
	}
	//设置移动速率，注意速率与速度的差别
	public void SetSpeed( int nSpeedX, int nSpeedY ){
		m_nSpeedX = nSpeedX;
		m_nSpeedY = nSpeedY;
	}	
	//逻辑操作，参数scrWidth、scrHeight分别是屏幕的宽和高
	public void Logic( int scrWidth, int scrHeight ){
		m_Missile.Logic(scrWidth, scrHeight);
	}

}