ufo.java

太空大战J2ME版本

package game0925;

import javax.microedition.lcdui.*;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2005</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class UFO extends Sprite {
    private Image ufoimg = null;
    private Image ufomissimg = null;
    protected int direction;
    protected static final int DIR_LEFT = 0;
    protected static final int DIR_RIGHT = 1;
    protected int count;
    protected int speed;
    public UFO(int x, int y, int direction, boolean isAlive, int speed) {
        if (ufoimg == null) {
            ufoimg = ImageTools.getImage("/img/ufo.png");
            ufomissimg = ImageTools.getImage("/img/burst.png");
        }
        this.speed = speed;
        this.x = x;
        this.y = y;
        this.direction = direction;
        this.isAlive = isAlive;
        width = 11;
        height = 11;

    }

    /**
     * doMove
     *
     * @todo Implement this game0925.Sprite method
     */
    protected void setDirection(int direction) {
        this.direction = direction;
    }

    void doMove() {
        if (this.isAlive()) {
            switch (direction) {
            case DIR_LEFT:

                switch (speed) {
                case 5:
                    x += 1;
                    break;
                case 4:
                    x += 2;
                    break;
                case 3:
                    x += 3;
                    break;
                case 2:
                    x +=4;
                    break;
                case 1:
                    x +=5;
                    break;
                default:
                    x += 6;
                    break;

                }
                break;
            case DIR_RIGHT:

                switch (speed) {
                case 5:
                    x -= 5;
                    break;
                case 4:
                    x -= 6;
                    break;
                case 3:
                    x -= 2;
                    break;
                case 2:
                    x -= 1;
                    break;
                case 1:
                    x -= 8;
                    break;
                default:
                    x -= 3;
                    break;

                }
                break;
            }
        }
    }

    /**
     * paint
     *
     * @param g Graphics
     * @todo Implement this game0925.Sprite method
     */
    void paint(Graphics g) {

        if (this.isHit()) {
            g.drawImage(ufomissimg, x, y, Graphics.TOP | Graphics.LEFT);
        } else {
            g.drawImage(ufoimg, x, y, Graphics.TOP | Graphics.LEFT);
        }

    }
}