snakemodel2.java

双人网络贪吃蛇 java课程设计

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
class SnakeModel2 implements Runnable
{
GreedSnake gs;
boolean[][] matrix;// 界面数据保存在数组里
LinkedList nodeArray=new LinkedList();
Node food;
int maxX;//最大宽度
int maxY;//最大长度
int direction=2;//方向
boolean running=false;
int timeInterval=200;// 间隔时间（速度）
double speedChangeRate=0.75;// 速度改变程度
boolean paused=false;// 游戏状态
int score=0;
int countMove=0;
// UP和DOWN是偶数，RIGHT和LEFT是奇数
public static final int UP=2;
public static final int DOWN=4;
public static final int LEFT=1;
public static final int RIGHT=3;
//----------------------------------------------------------------------
//GreedModel():初始化界面
//----------------------------------------------------------------------
public SnakeModel2(GreedSnake gs,int maxX,int maxY)
{
this.gs=gs;
this.maxX=maxX;
this.maxY=maxY;
matrix=new boolean[maxX][];
for(int i=0;i<maxX;++i)
{
matrix[i]=new boolean[maxY];
Arrays.fill(matrix[i],false);// 没有蛇和食物的地区置false
}
//初始化贪吃蛇
int initArrayLength=maxX>20 ? 10 : maxX/2;
for(int i=0;i<initArrayLength;++i)
{
int x=maxX/2+i;
int y=maxY/2;
nodeArray.addLast(new Node(x,y));
matrix[x][y]=true;// 蛇身处置true
}
food=createFood();
matrix[food.x][food.y]=true;// 食物处置true
}
//----------------------------------------------------------------------
//changeDirection():改变运动方向
//----------------------------------------------------------------------
public void changeDirection(int newDirection)
{
if(direction%2!=newDirection%2)// 避免冲突
{
direction=newDirection;
}
}
//----------------------------------------------------------------------
//moveOn():贪吃蛇运动函数
//----------------------------------------------------------------------
public boolean moveOn()
{
Node n2=(Node)nodeArray.getFirst();
int x=n2.x;
int y=n2.y;
switch(direction)
{
case UP:
y--;
break;
case DOWN:
y++;
break;
case LEFT:
x--;
break;
case RIGHT:
x++;
break;
}
if((0<=x&&x<maxX)&&(0<=y&&y<maxY))
{
if(matrix[x][y])// 吃到食物或者撞到身体
{
if(x==food.x&&y==food.y)// 吃到食物
{
nodeArray.addFirst(food);// 在头部加上一结点
//计分规则与移动长度和速度有关
int scoreGet=(10000-200*countMove)/timeInterval;
score+=scoreGet>0 ? scoreGet : 10;
countMove=0;
food=createFood();
matrix[food.x][food.y]=true;
return true;
}
else return false;// 撞到身体
}
else//什么都没有碰到
{
nodeArray.addFirst(new Node(x,y));// 加上头部
matrix[x][y]=true;
n2=(Node)nodeArray.removeLast();// 去掉尾部
matrix[n2.x][n2.y]=false;
countMove++;
return true;
}
}
return false;//越界（撞到墙壁）
}
//----------------------------------------------------------------------
//run():贪吃蛇运动线程
//----------------------------------------------------------------------
public void run()
{
running=true;
while(running)
{
try
{
Thread.sleep(timeInterval);
}catch(Exception e)
{
break;
}
if(!paused)
{
if(moveOn())// 未结束
{
gs.repaint2();
}
else//游戏结束
{
JOptionPane.showMessageDialog(null,"GAME OVER",
"Game Over",JOptionPane.INFORMATION_MESSAGE);
break;
}
}
}
running=false;
}
//----------------------------------------------------------------------
//createFood():生成食物及放置地点
//----------------------------------------------------------------------
private Node createFood()
{
int x=0;
int y=0;
do
{
Random r=new Random();
x=r.nextInt(maxX);
y=r.nextInt(maxY);
}while(matrix[x][y]);
return new Node(x,y);
}
//----------------------------------------------------------------------
//speedUp():加快蛇运动速度
//----------------------------------------------------------------------
public void speedUp()
{
timeInterval*=speedChangeRate;
}
//----------------------------------------------------------------------
//speedDown():放慢蛇运动速度
//----------------------------------------------------------------------
public void speedDown()
{
timeInterval/=speedChangeRate;
}
//----------------------------------------------------------------------
//changePauseState(): 改变游戏状态（暂停或继续）
//----------------------------------------------------------------------
public void changePauseState()
{
paused=!paused;
}
}