tools.java

实用J2ME游戏各种方法合集,包括碰撞

package game;

import javax.microedition.lcdui.Image;
import java.io.*;
import javax.microedition.lcdui.Graphics;
import java.util.Random;
import java.util.Vector;
import javax.microedition.lcdui.Font;

public class Tools {
    Random rand;
    MyCanvas mc;

    public Tools(MyCanvas mc) {
        this.rand = new Random();
        this.mc = mc;
    }
    /**
     * 得到图片对象
     * @param name String
     * @return Image
     */
    public Image getImage(String name)
    {
    Image img = null;
    try {
        img = Image.createImage(name);
    } catch (IOException ex) {

//        System.out.println("eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee");
    }
       return img;
    }

    /**
     *
     * @param img Image 图片
     * @param g Graphics 画笔
     * @param x int 要画在什么地方
     * @param y int要画在什么地方 坐标
     * @param clipx int 图片上的坐标
     * @param clipy int
     * @param frameWidth int 宽
     * @param frameHeight int 高
     * @param screenWidth int 屏幕的款
     * @param screenHeight int 屏幕的高
     */
    public void drawPartImage(Graphics g,Image img,int x,int y,int clipx,int clipy,int frameWidth,int frameHeight)
 //1351390244
    {

        g.setClip(x,y,frameWidth,frameHeight);
        g.drawImage(img,x-clipx,y-clipy,g.TOP|g.LEFT);
        g.setClip(0,0,mc.cw,mc.ch);
    }

    //随即函数
   public int getRandomNumber(int min,int max)
   {
       int t ;
       if(min>max)
       {
           t = min;
           min = max;
           max = t;

       }

     return Math.abs(rand.nextInt()%(max-min+1))+min;
   }

  public boolean collisonRC(int row2,int col2,int row3,int col3)
  {

  return (row2==row3)&&(col2==col3);
  }
    //碰撞
    public boolean inRect(int x1,int y1,int w1 ,int h1,int x2,int y2,int w2,int h2)
    {
    return !((x1+w1<x2)||(y1+h1<y2)||(x2+w2<x1)||(y2+h2<y1));
    }

    /**
  * 画按右下钮
  * @param g Graphics
  * @param name String
  * @param mc MyCanvas
  */
 public static void drawRightButton(Graphics g,String name,MyCanvas mc){
     mc = mc;
     g.drawString(name,mc.cw,mc.ch,g.BOTTOM | g.RIGHT);
 }
 /**
* 画左下按钮
* @param g Graphics
* @param name String
* @param mc MyCanvas
*/

 public static void drawLeftButton(Graphics g,String name,MyCanvas mc){
     mc = mc;
     g.drawString(name,0,mc.ch,g.BOTTOM | g.LEFT);
 }

 /**
     * 水平翻转
     * @param g Graphics
     * @param img Image
     * @param x int
     * @param y int
     */
    public  void drawHOverturn(Graphics g,Image img,int x,int y)
    {
        int width = img.getWidth();
        int height = img.getHeight();

        for (int i = 0; i < width; i++) {
            g.setClip(x + i, y, 1, height);

            g.drawImage(img, x - width + 2 * i, y, g.TOP | g.LEFT);

        }

        g.setClip(0,0,mc.cw,mc.ch);
    }
    /**
     *垂直翻转
     * @param g Graphics
     * @param img Image
     * @param x int
     * @param y int
     */

    public  void drawVOverturn(Graphics g,Image img,int x,int y)
 {
     int width = img.getWidth();
     int height = img.getHeight();

     for (int i = 0; i < height; i++) {
         g.setClip(x , y+i, width, 1);
         g.drawImage(img, x , y- height + 2 * i, g.TOP | g.LEFT);
     }
     g.setClip(0,0,mc.cw,mc.ch);
 }
//画横着的图片
 public void drawImageNumber(Graphics g, int number, Image img, int x, int y,
                             int frameWidth, int frameHeight
                            ) {
     String strNumber = number + "";
     for (int i = 0; i < strNumber.length(); i++) {
         int num = Integer.parseInt(strNumber.charAt(i) + "");
         this.drawPartImage(g, img, x + i * frameWidth, y, num * frameWidth,
                            0,
                            frameWidth, frameHeight);

     }
 }
         // 获得半透明图片，透明度从0到10共分为11个等级 midp 2.0
         public static final Image alfImage(Image img,int alf){
           if(img == null){
//            System.out.println("alfImage");
            return null;
           }
           if(alf < 0)
            alf = 0;
           else if(alf > 10)
            alf = 10;



           int imgW = img.getWidth();
           int imgH = img.getHeight();
           int[] RGBData = new int[imgW*imgH];
           img.getRGB(RGBData,0,imgW,0,0,imgW,imgH);
           int tmp = ((alf*255/10) << 24)|0x00ffffff;
           for(int i=0;i<RGBData.length;i++)
            RGBData[ i ] &= tmp;
           Image o_Img = Image.createRGBImage(RGBData,imgW,imgH,true);
           return o_Img;
}

       /**
           * 在制定矩形内,绘制折行文本,超出矩形范围的字符不显示
           * @param src 文本字串
           * @param g Graphics对象
           * @param x 矩形左上角x坐标
           * @param y 矩形左上角y坐标
           * @param w 矩形宽度
           * @param h 矩形高度
           * @param leftMargin 左边矩
           * @param topMargin 上边距
           * @param isVTight	行间距是否紧凑
           * @param fontColor 文字颜色
           * @param font 绘制所用字体
           */
          public static final void drawWrapString(String src, Graphics g, int x,
                                                  int y, int w,
                                                  int h, int leftMargin,
                                                  int topMargin,
                                                  int fontColor) {

              g.setColor(fontColor);
              int count = src.length();
              int curCharIndex = 0;
              int curX = x + leftMargin;
              int curY = y + topMargin;
              Font font=Font.getDefaultFont();
              int vDelta = font.getHeight();
//              if (isVTight) {
//                  //从上边缘到下边缘的高
//                  vDelta = font.getBaselinePosition();
//              }
              while (curCharIndex < count) {
                  char c = src.charAt(curCharIndex);
                  if (c == '\n') {
                      curX = x + leftMargin;
                      curY += vDelta;
                      curCharIndex++;
                      continue;
                  } else if (c == '\t') {
                      // 相当于2个空格
                      curX += font.charWidth(' ') * 2;
                      curCharIndex++;

                      continue;
                  }

                  if (curX + font.charWidth(c) < x + w) {

                      g.drawChar(c, curX, curY, Graphics.LEFT | Graphics.TOP);
                      curCharIndex++;
                      curX += font.charWidth(c);