player.java

DOJA平台赛车游戏

/*
 * @(#)Player.java    1.0 04/07/01 @(#)
 *
 * Copyright 2004 NTT DoCoMo, Inc. All rights reserved.
 */
import com.nttdocomo.ui.Display;

/** 
 * Player<BR>
 * The definition class of the player.
 * <p>
 * @version 1.0
 * </p>
 */
public class Player extends AbstractItem {
    /** The position of the player at the time of game start (Width) */
    private static final int START_POSITION_X = 150;
    /** The position of the player at the time of game start (Height) */
    private static final int START_POSITION_Y = 150;

    /** The amount of movements of the car */
    private static final int DEFAULT_AMOUNT = 2;
    /** The frequency of movements of the car */
    private static final int MOVE_FREQUENCY = 20;

    /** The number of stocks of the car */
    private int stock;
    /** The first number of stocks of the car */
    private static final int INTITIL_STOCK = 3;

    /**
     * Constructor.
     */
    public Player() {
        super(TYPE_PLAYER);
        init();
    }

    /**
     * Initialization
     */
    public void init() {
        stock = INTITIL_STOCK;
        reset();
    }

    /**
     * Initializes the state of the player.
     */
    public void reset() {
        setStatus(STATUS_NORMAL);
        setImage(MediaCollection.IMG_PLAYER);
        setPosX(START_POSITION_X);
        setPosY(START_POSITION_Y);
    }

    /**
     * Acquires the number of stocks of the car.
     * @return stocks
     */
    public int getStock() {
        return stock;
    }

    /*
     * @see AbstractItem#move(int, int)
     */
    public void move(int _direction, int stage) {
        move(_direction, MOVE_FREQUENCY, DEFAULT_AMOUNT);
    }

    /*
     * @see AbstractItem#move(int, int, int)
     */
    public void move(int _direction, int _frequency, int _amount) {
        if (STATUS_CONTACT == getStatus()) {
            return;
        }

        /* Upper end / Lower end */
        int posY = this.getPosY();
        int height = this.getImage().getHeight();
        if ((DIRECTION_UP == _direction) && (2 > (posY - DEFAULT_AMOUNT))) {
            return;
        }
        if ((DIRECTION_DOWN == _direction) &&
                ((posY + DEFAULT_AMOUNT) > (Display.getHeight() - height))) {
            return;
        }
        super.move(_direction, _frequency, _amount);
    }

    /**
     * Confirmes whether the player is moving out of course.
     * @param _leftEnd Left end of course
     * @param _rightEnd Right end of course
     * @return true:Course out
     */
    public boolean isCourseOut(int _leftEnd, int _rightEnd) {
        int posX = this.getPosX();
        int width = this.getImage().getWidth();

        /* Course out */
        if ((posX < _leftEnd) || (posX + width > _rightEnd)) {
            fail();
            return true;
        }
        return false;
    }

    /**
     * Subtracts one from the number of stocks.
     */
    public void fail() {
        setStatus(STATUS_CONTACT);
        setImage(MediaCollection.IMG_FIRE);
        stock--;
    }

    /**
     * Adds one to the number of stocks.
     */
    public void oneUp() {
        stock++;
    }

    /*
     * @see AbstractItem#contact()
     */
    public void contact() {
        fail();
    }
}