npc_bound.java

j2me 横版过关游戏工程。（demo）.可以参考下

import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

/*
 * 创建日期 2006-1-17
 *
 * TODO 要更改此生成的文件的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */

/**
 * @author admin
 * 
 * TODO 要更改此生成的类型注释的模板，请转至 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
public class Npc_Bound
{
    
    private int npcLen=15;
    Npc_West       npc[] = new Npc_West[npcLen];

    GameDataSimple data  = WestGameCanvas.data;

    void move(int mapDx, int mapDy, Player_West player)
    {
        int i;
        //消失
        for (i = npcLen; --i >= 0;)
            if (null != npc[i] && npc[i].num == -1)
                npc[i] = null;
        //移动
        Npc_West npcTemp;
        for (i = npcLen; --i >= 0;)
        {
            npcTemp = npc[i];
            if (null != npcTemp)
            {
                if (npcTemp.id == 4 && npcTemp.npcState == 4)
                {
                    npcTemp.setPosition(player.x + 15, player.y
                            - npcTemp.srcFrameHeight + 20);
                }
                else
                {
                    npcTemp.move(mapDx, mapDy);
                    npcTemp.moveSelf(player);
                }
            }
        }
        //生成
        short[] npcPositionI;
        short npcPosition0;
        short npcPosition1;
        short[] temp = null;
        for (i = data.getNpcPosition().length; --i >= 0;)
        {
            npcPositionI = data.getNpcPosition()[i];
            if (npcPositionI[5] + WestGameCanvas.mapX <= 0)
                break;
            if (npcPositionI[4] + WestGameCanvas.mapX <= WestGameCanvas.screenWidth)
            {
                for (int j = npcLen; --j >= 0;)
                {
                    if (null != npc[j] && npc[j].num == i)
                        break;
                    if (j == 0)
                    {
                        for (int k = 0; k < npcLen; k++)
                        {
                            if (null == npc[k] || npc[k].num == -1)
                            {//后有break，只执行一次
					            npcPosition0 = npcPositionI[0];
					            npcPosition1 = npcPositionI[1];
                                switch (npcPosition0)
                                {
                                    case 0:
                                        temp = data.getNpcKind()[npcPosition1];
                                        break;
                                    case 1:
                                        temp = data.getCloundKind()[npcPosition1];
                                        break;
                                    case 3:
                                        temp = data.getBossKind()[npcPosition1];
                                        break;
                                    case 4:
                                        temp = data.getStoneKind()[npcPosition1];
                                        break;
                                }
                                if (npcPosition0 == 2)
                                    npc[k] = new Npc_West(npcPosition0,
                                            npcPosition1, i,
                                            GameDataSimple.imgNpc[0], 18, 20);
                                else
                                    npc[k] = new Npc_West(npcPosition0,
                                            npcPosition1, i,
                                            GameDataSimple.imgNpc[temp[0]],
                                            temp[1], temp[2]);
                                break;
                            }
                        }
                    }
                }
            }
        }

    }

    void paintSelf(Graphics g)
    {
        for (int i = 0; i < npcLen; i++)
            if (null != npc[i])
                npc[i].paintSelf(g);
    }

    void creatCloud(int playerX, int playerY)
    {
        int i;
        Npc_West npcTemp;
        short[] coloudKind;
        for (i = npcLen; --i >= 0;)
        {
            npcTemp=npc[i];
            if (null != npcTemp && -1 != npcTemp.num && npcTemp.littleId == 4)
                return;
        }
        for (i = 0; i < npcLen; i++)
        {
            if (null == npc[i])
            {
                coloudKind=data.getCloundKind()[4];
                npc[i] = new Npc_West(1, 4, 0, GameDataSimple.imgNpc[coloudKind[0]], coloudKind[1], coloudKind[2]);
                npc[i].setPosition(playerX, playerY);
                return;
            }
        }
    }
}