map.java

一款修改过的手机贪食蛇游戏

/*
 * Map.java
 *
 * Created on June 19, 2007, 1:52 AM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package hello;

/**
 *
 * @author jiabei
 */
public class Map {
    
    private final int width;
    private final int height;
    private final int pixelWidth;
    private final int pixelHeight;
    
    private final int snakeNum;
    private final boolean canCollide;
    private final int maxFruitNum;
    private final int victoryFruitNum;
        
    private Snake[] currentSnake;    
    private int fruitNum;
    private int aliveSnakeNum;
    
    
    private int[][] currentMap;
    private Fruit[] fruit;
    
    
    
    /** Creates a new instance of Map */
    public Map(int maxFruitNum, int victoryFruitNum, int pixelWidth, int pixelHeight, int width, int height, int snakeNum, Snake[] snake, boolean canCollide) {
        this.pixelWidth = pixelWidth;
        this.pixelHeight = pixelHeight;        
        this.width = width;
        this.height = height;
        this.currentMap = new int[height][width];
        this.snakeNum = snakeNum;
        aliveSnakeNum = snakeNum;
        this.currentSnake = snake;
        this.canCollide = canCollide;
        this.maxFruitNum = maxFruitNum;
        this.victoryFruitNum = victoryFruitNum;             
        fruit = new Fruit[maxFruitNum];
    }
    
    public int getPixelWidth() {
        return pixelWidth;
    }
    
    public int getPixelHeight() {
        return pixelHeight;
    }
    
    public boolean decressSnake() {
        if (aliveSnakeNum > 0) {
            aliveSnakeNum --;
        }
        return aliveSnakeNum > 0;
    }
    
    public boolean canCollide() {
        return canCollide;
    }
    
    public boolean isOver() {
        boolean isOver = false;
        for (int i = 0; i < getSnakeNum(); i ++)
            if (currentSnake[i].getEatedFruitNum() >= victoryFruitNum) {
                isOver = true; break;
            }
        return (aliveSnakeNum <= 1 || isOver);
    }
    
    private int key2Direction(int keyState) {
        if ((keyState & GamingCanvas.LEFT_PRESSED) != 0) {
            //System.out.println("Left!");
            return Snake.DIRECTION_LEFT;
        } else if ((keyState & GamingCanvas.RIGHT_PRESSED) != 0) {
            //System.out.println("Right!");
            return Snake.DIRECTION_RIGHT;
        } else if ((keyState & GamingCanvas.UP_PRESSED) != 0) {
            //System.out.println("Up!");
            return Snake.DIRECTION_UP;
        } else if ((keyState & GamingCanvas.DOWN_PRESSED) != 0) {
            //System.out.println("Down!");
            return Snake.DIRECTION_DOWN;
        }
        return Snake.DIRECTION_NOCHANGE;
    }
    
    public void deleteFruit(int k) {
        for (int i = k; i < fruitNum - 1; i ++) {
            fruit[i] = fruit[i + 1];
        }
        fruitNum --;
    }
    
    public int update(int keyState) {
        if (fruitNum < maxFruitNum) {
            fruit[fruitNum] = Fruit.getRandomFruit(this);
            fruitNum ++;            
        }
            
        for (int i = 0; i < snakeNum; i ++) if (currentSnake[i].isAlive()) {
            if (currentSnake[i].getControl() == Snake.CONTROL_KEYBOARD) {
                currentSnake[i].setDirection(key2Direction(keyState));
            } else {
                currentSnake[i].setDirection(Ai.getDirection(this, i));
            }            
        }
        int state = 0;
        for (int i = 0; i < snakeNum; i ++) if (currentSnake[i].isAlive()) {
            state = Snake.update(this, i, canCollide);
        }
        return state;            
    }
    
    public int getWidth() {
        return width;
    }
    
    public int getHeight() {
        return height;
    }
    
    public int getSnakeNum() {
        return snakeNum;
    }
    
    public Snake getCurSnake(int i) {
        if (i >= 0 && i < snakeNum) {
            return currentSnake[i];
        }
        return null;
    }
    
    public int getFruitNum() {
        return fruitNum;
    }
    
    public boolean inBound(Point p) {
        return (p.getX()>= 0 && p.getX() < width && p.getY() >= 0 && p.getY() < height );
    }
    
    public Fruit getFruit(int i) {
        if (i >= 0 && i < fruitNum) {
            return fruit[i];
        } 
        return null;
    }
    
}