life.java

坦克大战代码

package com.caizi;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Rectangle;
/**
 * Life类，用于坦克的生命的增加
 * @author user
 *
 */
public class Life {
	private int x,y;
	private boolean live = true;
	private static final int WIDTH = 10;
	private static final int HIGHTH = 10;
	private static float X_SPEED;
	private static float Y_SPEED;
	private TankClient tc;
	
	public Life(TankClient tc){
		this.tc = tc;
		this.x = (int)(Math.random()*tc.getWINDOW_WIDTH());
		this.y = (int)(Math.random()*tc.getWINDOW_HEIGHT());	
		this.makeDir();
	}	
	/**
	 * makeDir()用于确定生命的移动方向和速度
	 * X_SPEED表示运动的x速度
	 */
	public void makeDir(){		
		this.X_SPEED = (float) (Math.random()*3-1.5);
		if(Math.random()>0.5){
			if(this.X_SPEED>0)
				this.Y_SPEED = 2 - this.X_SPEED;
			else
				this.Y_SPEED = 2 + this.X_SPEED;
		} else{
			if(this.X_SPEED>0)
				this.Y_SPEED = this.X_SPEED - 2;
			else
				this.Y_SPEED = -( 2 + this.X_SPEED);
		}
		
	}
	public void draw(Graphics g){
		Color c = g.getColor();
		g.setColor(Color.MAGENTA);
		g.fillRect(x, y, WIDTH, HIGHTH);
		g.setColor(c);	
		this.move();
	}
	public void move(){
		checkBorder();
		this.x += this.X_SPEED;
		this.y += this.Y_SPEED;
	}
	public void checkBorder(){
		if(this.x <=0 || this.y <=0 ||this.x >= tc.getWidth() || this.y >= tc.getHeight())
			makeDir();
	}
	public Rectangle getRect(){
		return new Rectangle(x,y,WIDTH,HIGHTH);
	}

	public boolean isLive() {
		return live;
	}
	public void setLive(boolean live) {
		this.live = live;
	}
	
}