map.java

这是一个手机端的地图编辑器

package snake;
/*
 * Map.java
 *
 * Created on 2007年11月26日, 下午3:50
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */
import javax.microedition.lcdui.*;
import java.io.*;
import javax.microedition.lcdui.game.Sprite;
/**
 *
 * @author xiaoxin
 */
public class Map {
    //地图层
    private short data[][][];
    //逻辑层
    private byte logicData[][];
    private Image mapImage;
    public static int tileWidth;
    public static int tileHeight;
    public static int column;
    public static int row;
    /** Creates a new instance of Map */
    public Map(Image img) {
        this.mapImage = img;
    }
    
    public void loadMap(DataInputStream dis) throws Exception{
        int layerNum = dis.readByte();
        column = dis.readByte();
        row = dis.readByte();
        tileWidth = dis.readByte();
        tileHeight = dis.readByte();
        data = new short[layerNum][row][column];
        logicData = new byte[row][column];
        for(int i = -1; ++i < layerNum;){
            for(int j = -1; ++j < row;){
                for(int h = -1; ++h < column;){
                    data[i][j][h] = dis.readShort();
                }
            }
        }
        
        for(int i = -1; ++i < row;){
            for(int j = -1; ++j < column;){
                logicData[i][j] = dis.readByte();
            }
        }
        
    }
    
    public int getLogicCode(int row, int col){
        return logicData[row][col];
    }
    
    //后面两个参数为视口坐标（看不到得地方不绘制）
    //未用卡马克缓冲，需要的请自己修改
  /*  public void render(Graphics g, int showX, int showY){
        
        int row = showY / tileHeight;
        int col = showX / tileWidth;
        int wSize = myCanvas.ScreenWidth / tileWidth + 2;
        int hSize = myCanvas.ScreenHeight / tileHeight + 2;
        
        int drawX = -showX;
        int drawY = -showY;

        for(int h = -1; ++h < data.length;){
            for(int i = row - 1; ++i < row + hSize;){
                
            
                for(int j = col - 1; ++j < col + wSize;){
                    if(i >= data[h].length || j >= data[h][i].length || i < 0 || j < 0){
                        continue;
                    }
                    short id = data[h][i][j];
                    if(id != -1){
                        
                        int clipX = id % (mapImage.getWidth() / tileWidth) * tileWidth;
                        int clipY = id / (mapImage.getHeight() / tileHeight) * tileHeight;
                        
                        g.drawRegion(mapImage, clipX, clipY, tileWidth, tileHeight, Sprite.TRANS_NONE, drawX + j * tileWidth, drawY + i * tileHeight, 0);
                    }
                }
            }
        }*/
		public void render(Graphics g, int showX, int showY){
        
        int row = showY / tileHeight;
        int col = showX / tileWidth;
        int wSize = myCanvas.ScreenWidth / tileWidth + 1;
        int hSize = myCanvas.ScreenHeight / tileHeight + 1;
        
        int drawX = 0;
        int drawY = 0;
        
        for(int h = -1; ++h < data.length;){
            drawY = -(showY % tileHeight);
            for(int i = row - 1; ++i < row + hSize;){
                drawX = -(showX % tileWidth);
                for(int j = col - 1; ++j < col + wSize;){
                    if(i >= data[h].length || j >= data[h][i].length || i < 0 || j < 0){
                        continue;
                    }
                    short id = data[h][i][j];
                    if(id != -1){
                        
                        //int clipX = id % (mapImage.getWidth() / tileWidth) * tileWidth;
                        //int clipY = id / (mapImage.getHeight() / tileHeight) * tileHeight;
                        int clipX = id % (mapImage.getWidth() / tileWidth) * tileWidth;
						int clipY = id / (mapImage.getWidth() / tileWidth) * tileHeight;


                        g.drawRegion(mapImage, clipX, clipY, tileWidth, tileHeight, Sprite.TRANS_NONE, drawX, drawY, 0);
                    }
                    drawX += tileWidth;
                }
                drawY += tileHeight;
            }
        }
    


    }
    
}