mainsprite.java

来自「J2ME拯救海盗游戏基本功能已实现11111111」· Java 代码 · 共 60 行

import java.util.Random;

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

//主精灵类
public class MainSprite extends Sprite
{
	private Random rand;
	private int speed;
	private TiledLayer barrier;//障碍图层
	
	public static final int UP = 0;
	public static final int RIGHT = 1;
	public static final int DOWN = 2;
	public static final int LEFT = 3;
	
	public MainSprite(Image img, int tw, int th, int speed, TiledLayer barrier)
    {
	    super(img, tw, th);
	    
	    rand = new Random();
	    this.speed = speed;
	    this.barrier = barrier;
	    
	    this.RandomPosition();
    }

	public Random getRandom()
	{
		return rand;
	}
	
	public int getSpeed()
	{
		return this.speed;
	}
	
	public TiledLayer getBarrier()
	{
		return this.barrier;
	}
	
	//随机生成精灵位置
	public void RandomPosition() 
	{
		// 第一次生成
		this.setPosition(Math.abs(rand.nextInt() % (barrier.getWidth()- this.getWidth())), 
						   Math.abs(rand.nextInt() % (barrier.getHeight()- this.getHeight())));

		// 如果发生碰撞，重新生成
		while (this.collidesWith(barrier, true))
		{
			this.setPosition(Math.abs(rand.nextInt() % (barrier.getWidth()- this.getWidth())), 
					   		   Math.abs(rand.nextInt() % (barrier.getHeight()- this.getHeight())));
		}
	}
}