scene.java

简单的rpg游戏 实现了基本功能 非常有趣

import java.io.IOException;
import java.io.InputStream;

import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.LayerManager;
import javax.microedition.lcdui.game.TiledLayer;

public class Scene {
	public int m_nCurIndex;
	private TiledLayer m_LyPass;					//可通过的区域
	private TiledLayer m_LyNotPass;				//不可通过的区域
	private TiledLayer m_LyJump;					//跳转场景的区域
	Scene( ){
		try{
			//读取tile图像
			Image image = Image.createImage("/demo/map.png");
			m_LyPass = new TiledLayer( 10, 10, image, 32, 32 );
			m_LyNotPass = new TiledLayer( 10, 10, image, 32, 32 );
			m_LyJump = new TiledLayer( 10, 10, image, 32, 32 );
		}catch (IOException e){}
	}
	//将各图层加入到层管理器
	public void AppendToManager( LayerManager mManager ){
		mManager.append( m_LyPass );
		mManager.append( m_LyNotPass );
		mManager.append( m_LyJump );
	}
	//进入指定场景
	//nIndex是场景的编号，mActor、nNpc分别是MM和NPC对象
	public void EnterScene( int nIndex, Actor mActor, Npc mNpc ){
		m_nCurIndex = nIndex;
		InputStream is = null;
		//根据场景，设置MM和NPC的位置及图像
		switch( nIndex )
		{
		case 0:
			is = getClass().getResourceAsStream("/demo/map0.txt");
			mActor.setRefPixelPosition( 150, 150 );
			mNpc.setFrame( 0 );
			mNpc.SetText( "洞穴上层有个人知道出口！" );
			mNpc.setRefPixelPosition( 130, 120 );
			break;
		default:
			is = getClass().getResourceAsStream("/demo/map1.txt");
			mActor.setRefPixelPosition( 200, 160 );
			mNpc.setFrame( 1 );
			mNpc.SetText( "洞穴出口在下层的右下角。" );
			mNpc.setRefPixelPosition( 150, 50 );
			break;
		}
		//读取场景
		LoadScene( is );
	}
	//获取场景的宽度
	public int GetWidth(){
		return m_LyPass.getWidth();
	}
	//获取场景的高度
	public int GetHeight(){
		return m_LyPass.getHeight();
	}
	//检测MM和场景及NPC的碰撞
	public void CollidesWidth( Actor mActor, Npc mNpc ){
		if( mActor.collidesWith( m_LyJump, false ) )
		{
			mActor.MoveBack();
			if( m_nCurIndex == 0 )
				EnterScene( 1, mActor, mNpc );
			else
				EnterScene( 0, mActor, mNpc );
		}
		else if( mActor.collidesWith( m_LyNotPass, false ) )
		{
			mActor.MoveBack();
		}
	}
	//读取场景文件
	private void LoadScene( InputStream is ){
		try{
			int ch = -1;
			for( int nRow = 0; nRow < 10; nRow ++ )
			{
				for( int nCol = 0; nCol < 10; nCol ++ )
				{
					ch = -1;
					while( ( ch < 0 || ch > 7 ) )
					{
						ch = is.read();
						if( ch == -1 )
							return;
						ch = ch - '0';
					}
					if( ch == 4 || ch == 5 )
					{//不可通过的区域
						m_LyPass.setCell( nCol, nRow, 0 );
						m_LyNotPass.setCell( nCol, nRow, ch );
						m_LyJump.setCell( nCol, nRow, 0 );
					}
					else if( ch == 6 || ch == 7 )
					{//跳转场景的区域
						m_LyPass.setCell( nCol, nRow, 0 );
						m_LyNotPass.setCell( nCol, nRow, 0 );
						m_LyJump.setCell( nCol, nRow, ch );
					}
					else
					{//可通过的区域
						m_LyPass.setCell( nCol, nRow, ch );
						m_LyNotPass.setCell( nCol, nRow, 0 );
						m_LyJump.setCell( nCol, nRow, 0 );
					}
				}
			}	
		}
		catch (IOException e){}	
	}
}