/* * * Copyright ? 2007 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. *//* * WormFood.java * * Created on March 30, 2001, 16:15 * @version */package example.wormgame;import javax.microedition.lcdui.Graphics;/** * WormFood is a food item that the worm can eat. It is placed at * a pseudo randomly generated location in the pit. */public class WormFood {    /** Current food location x coordinate in cells. */    private int cellX;    /** Current food location y coordinate in cells. */    private int cellY;    /*     * These members are for convenience only. They are generated using     * expensive multiplication operations and are cached for quick access     */    /** Current food location x coordinate in pixels. */    private int x;    /** Current food location y coordinate in pixels. */    private int y;    /** Size of arena in cells. */    private long arenaSize;    /**     * Constructor for worm food object.     * @param pit pit to which the food is associated. (unused currently)     */    public WormFood(WormPit pit) {        arenaSize = WormPit.CellWidth * WormPit.CellHeight;        regenerate();    }    /**     * Returns true if the food item is at the given cell.     * @param cx x coordinate of cell to test     * @param cy y coordinate of cell to test     * @return true, if the food is at the cell coordinate     */    public boolean isAt(int cx, int cy) {        return ((this.cellX == cx) && (this.cellY == cy));    }    /**     * Get the X coordinate of the cell that contains the food item.     * @return x coordinate of food cell location     */    public int getX() {        return cellX;    }    /**     * Get the Y coordinate of the cell that contains the food item.     * @return y coordinate of food cell location     */    public int getY() {        return cellY;    }    /**     * Regenerate the food item. Whenever the worm eats a piece of     * food, this method is called.     */    public void regenerate() {        int loc = (int)(System.currentTimeMillis() % arenaSize);        cellY = (int)(loc / WormPit.CellWidth);        cellX = (int)(loc % WormPit.CellHeight);        y = cellY * WormPit.CELL_SIZE; // Cache to save time during paint        x = cellX * WormPit.CELL_SIZE; // Cache to save time during paint                                       // If food was generated outside of the board, try a new location        if (!WormPit.isInBounds(cellX, cellY)) {            regenerate();        }    }    /**     * Paint the piece of food.     * @param g graphics object to receive rendering of food object     */    public void paint(Graphics g) {        g.setColor(WormPit.FOOD_COLOUR);        g.fillRect(x + 1, y + 1, WormPit.CELL_SIZE - 2, WormPit.CELL_SIZE - 2);        g.setColor(WormPit.DRAW_COLOUR);        g.drawRect(x, y, WormPit.CELL_SIZE - 1, WormPit.CELL_SIZE - 1);    }}