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Snake
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Snake
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package snake;
import java.util.LinkedList;
import java.util.Random;
public class Snake {
private LinkedList<Node> snakeBody;//蛇身
private SnakeGameView snakeGameView;
//Snake方向:0.上,1.右,2.下,3.左
private int direction = 0;//方向
private static final int UP = 0;
private static final int RIGHT = 1;
private static final int DOWN = 2;
private static final int LEFT = 3;
private static final int LENGTH_BEGIN = 3;
private Random random;
//构造函数
public Snake(int snakeHeadX, int snakeHeadY, SnakeGameView snakeGameView) {
random = new Random();
snakeBody = new LinkedList<>();
//初始化蛇身
for(int i = 0; i < LENGTH_BEGIN; i++) {
snakeBody.add(new Node(snakeHeadX, snakeHeadY + i*DrawView.VIEW_NUMBER));
}
this.snakeGameView = snakeGameView;
}
//设置方向
public void setDirection(int direction) {
this.direction = direction;
}
//获得方向
public int getDirection() {
return direction;
}
public LinkedList<Node> getSnakeBody(){
return this.snakeBody;
}
//获得头节点
public Node getSnakeHead() {
return snakeBody.getFirst();
}
//获得尾节点
public Node getSnakeLast() {
return snakeBody.getLast();
}
//蛇移动
public void snakeMove() {
switch(direction) {
case UP:
snakeBody.addFirst(new Node(getSnakeHead().getNodeX(), getSnakeHead().getNodeY() - DrawView.VIEW_NUMBER));
break;
case RIGHT:
snakeBody.addFirst(new Node(getSnakeHead().getNodeX() + DrawView.VIEW_NUMBER, getSnakeHead().getNodeY()));
break;
case DOWN:
snakeBody.addFirst(new Node(getSnakeHead().getNodeX(), getSnakeHead().getNodeY() + DrawView.VIEW_NUMBER));
break;
case LEFT:
snakeBody.addFirst(new Node(getSnakeHead().getNodeX() - DrawView.VIEW_NUMBER, getSnakeHead().getNodeY()));
break;
}
snakeBody.removeLast();
}
//蛇吃蛋
public void eatEgg(Node egg) {
if(this.getSnakeHead().getNodeX() == egg.getNodeX() && this.getSnakeHead().getNodeY() == egg.getNodeY()) {
//加长身子
snakeBody.add(egg);
//产蛋
snakeGameView.setEgg(random.nextInt(DrawView.VIEW_WIDTH-1)*DrawView.VIEW_NUMBER,
random.nextInt(DrawView.VIEW_WIDTH-1)*DrawView.VIEW_NUMBER);
SnakeGameView.gameScore = SnakeGameView.gameScore + 5;//加分
snakeGameView.getJTextArea().setText(SnakeGameView.gameScore + "");
System.out.println("吃蛋!");
}
}
//蛇越界
public void snakeRunInterFace() {
if(this.getSnakeHead().getNodeX() <0 || this.getSnakeHead().getNodeY() < 0 || this.getSnakeHead().getNodeX() > (DrawView.VIEW_WIDTH * DrawView.VIEW_NUMBER)||
this.getSnakeHead().getNodeY() > (DrawView.VIEW_WIDTH * DrawView.VIEW_NUMBER)) {
SnakeGameView.gameState = false;
}
}
}