backdrop.java

游戏学院学过的一个J2ME代码实例的整理

package npc7776;

import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;

/******************************************
 * 类功能介绍:设置背景及清除屏幕
 *****************************************/


public class backdrop {
  private static final int[][] map1 = {
      {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      3, 0, 0, 0, 0, 0, 0, 0}
      , {
      6, 0, 0, 0, 0, 0, 0, 0}
      , {
      6, 0, 0, 0, 0, 0, 1, 2}
      , {
      6, 0, 0, 0, 0, 0, 4, 5}
      , {
      6, 0, 0, 0, 0, 0, 7, 8}
      , {
      6, 0, 0, 0, 0, 0, 0, 0}
      , {
      9, 0, 0, 0, 1, 2, 3, 0}
      , {
      0, 0, 0, 0, 4, 5, 6, 0}
      , {
      0, 0, 0, 0, 7, 8, 9, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      3, 0, 0, 0, 0, 0, 0, 0}
      , {
      6, 0, 0, 0, 0, 0, 0, 0}
      , {
      6, 0, 0, 0, 0, 0, 1, 2}
      , {
      6, 0, 0, 0, 0, 0, 4, 5}
      , {
      6, 0, 0, 0, 0, 0, 7, 8}
      , {
      6, 0, 0, 0, 0, 0, 0, 0, }
      , {
      9, 0, 0, 0, 1, 2, 3, 0}
      , {
      0, 0, 0, 0, 4, 5, 6, 0}
      , {
      0, 0, 0, 0, 7, 8, 9, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      3, 0, 0, 0, 0, 0, 0, 0}
      , {
      6, 0, 0, 0, 0, 0, 0, 0}
      , {
      6, 0, 0, 0, 0, 0, 1, 2}
      , {
      6, 0, 0, 0, 0, 0, 4, 5}
      , {
      6, 0, 0, 0, 0, 0, 7, 8}
      , {
      6, 0, 0, 0, 0, 0, 0, 0}
      , {
      9, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      3, 0, 0, 0, 0, 0, 0, 1}
  };

  private static final int[][] map2 = {
      {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      3, 0, 0, 0, 0, 0, 0, 0}
      , {
      6, 0, 0, 0, 0, 0, 0, 0}
      , {
      6, 0, 0, 0, 0, 0, 1, 2}
      , {
      6, 0, 0, 0, 0, 0, 4, 5}
      , {
      6, 0, 0, 0, 0, 0, 7, 8}
      , {
      6, 0, 0, 0, 0, 0, 0, 0}
      , {
      9, 0, 0, 0, 1, 2, 3, 0}
      , {
      0, 0, 0, 0, 4, 5, 6, 0}
      , {
      0, 0, 0, 0, 7, 8, 9, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      3, 0, 0, 0, 0, 0, 0, 0}
      , {
      6, 0, 0, 0, 0, 0, 0, 0}
      , {
      6, 0, 0, 0, 0, 0, 1, 2}
      , {
      6, 0, 0, 0, 0, 0, 4, 5}
      , {
      6, 0, 0, 0, 0, 0, 7, 8}
      , {
      6, 0, 0, 0, 0, 0, 0, 0}
      , {
      9, 0, 0, 0, 1, 2, 3, 0}
      , {
      0, 0, 0, 0, 4, 5, 6, 0}
      , {
      0, 0, 0, 0, 7, 8, 9, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      3, 0, 0, 0, 0, 0, 0, 0}
      , {
      6, 0, 0, 0, 0, 0, 0, 0}
      , {
      6, 0, 0, 0, 0, 0, 1, 2}
      , {
      6, 0, 0, 0, 0, 0, 4, 5}
      , {
      6, 0, 0, 0, 0, 0, 7, 8}
      , {
      6, 0, 0, 0, 0, 0, 0, 0}
      , {
      9, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      0, 0, 0, 0, 0, 0, 0, 0}
      , {
      3, 0, 0, 0, 0, 0, 0, 1}
  };
  private static final int TILE_WIDTH = 32; //图片宽
  private static final int TILE_HIEGHT = 32; //图片高
  private static final int TILE_NUM_COL = 8; //列
  private static final int TILE_NUM_ROW = 36; //排
  private int[][] currentMap; //地图
  private TiledLayer dixing; // 地形
  private int groundColor; // 背景颜色
  private int screenHeight; // 计算Y 轴
  private int dixingScroll; //屏幕Y 位置

  public backdrop(int screenHeight) {

    this.screenHeight = screenHeight;
    try {
      setMap(2);
    }
    catch (Exception e) {}
  }

  public void setMap(int LeveL) throws Exception {
    Image tiledImages = null;
    switch (LeveL) {
      case 1:
        tiledImages = Image.createImage("/res/terrain1.png");
        currentMap = map1;
        groundColor = 0xF8DDBE;
        break;
      case 2:
        tiledImages = Image.createImage("/res/terrain2.png");
        currentMap = map2;
        groundColor = 0xF8DDBE;
        break;
      default:
        tiledImages = Image.createImage("/res/terrain1.png");
        currentMap = map1;
        groundColor = 0xF8DDBE;
        break;

    }
    dixing = new TiledLayer(TILE_NUM_COL, TILE_NUM_ROW, tiledImages, TILE_WIDTH,
                            TILE_HIEGHT);
    for (int row = 0; row < TILE_NUM_ROW; row++) {
      for (int col = 0; col < TILE_NUM_COL; col++) {
        dixing.setCell(col, row, currentMap[row][col]);
      }

    }
   /* dixingScroll = 1 - dixing.getCellHeight() * dixing.getRows() +
        this.screenHeight;
    dixing.setPosition(0, dixingScroll); */
    dixing.setPosition(0, 0);
  }

  public void scrollTerrain(Graphics g) {
    /*if (dixingScroll < 0) {
      dixingScroll += 2;
      dixing.setPosition(0, dixingScroll);
      dixing.paint(g);
    }
    else if (dixingScroll == 0) {
      dixing.setPosition(0, 0);
      dixing.paint(g);
    }*/
    if (dixingScroll > (this.screenHeight-dixing.getCellHeight()*dixing.getRows()-1)) {
        dixingScroll -= 2;
        dixing.setPosition(0, dixingScroll);
        dixing.paint(g);
      }
      else if (dixingScroll == (this.screenHeight-dixing.getCellHeight()*dixing.getRows()-1)) {
        dixing.setPosition(0, dixingScroll);
        dixing.paint(g);
      }

  }

  public TiledLayer getTerrain() {
    return dixing;
  }

  public int getGroundColor() {
    return groundColor;
  }

}