j2me任意角度翻转图片

    代码如下：
    package com.xx;
    import javax.microedition.lcdui.Graphics;
      /*
      * 图片任意角度翻转算法
      * 同时实现了Nokia特有API
      * author. BB
      * Sprite.java
      *
      *
      */
     public class Sprite {
       /** SIN TABLE **/
       public final static int SIN_TABLE[] ={
        0, 4, 8, 13, 17, 22, 26, 31, 35, 39,
        44, 48, 53, 57, 61, 65, 70, 74, 78, 83,
        87, 91, 95, 99, 103, 107, 111, 115, 119, 123,
        127, 131, 135, 138, 142, 146, 149, 153, 156, 160,
        163, 167, 170, 173, 177, 180, 183, 186, 189, 192,
        195, 198, 200, 203, 206, 208, 211, 213, 216, 218,
        220, 223, 225, 227, 229, 231, 232, 234, 236, 238,
        239, 241, 242, 243, 245, 246, 247, 248, 249, 250,
        251, 251, 252, 253, 253, 254, 254, 254, 254, 254,
        255, 254, 254, 254, 254, 254, 253, 253, 252, 251,
        251, 250, 249, 248, 247, 246, 245, 243, 242, 241,
        239, 238, 236, 234, 232, 231, 229, 227, 225, 223,
        220, 218, 216, 213, 211, 208, 206, 203, 200, 198,
        195, 192, 189, 186, 183, 180, 177, 173, 170, 167,
        163, 160, 156, 153, 149, 146, 142, 138, 135, 131,
        127, 123, 119, 115, 111, 107, 103, 99, 95, 91,
        87, 83, 78, 74, 70, 65, 61, 57, 53, 48,
        44, 39, 35, 31, 26, 22, 17, 13, 8, 4,
        0, -4, -8, -13, -17, -22, -26, -31, -35, -39,
        -44, -48, -53, -57, -61, -65, -70, -74, -78, -83,
        -87, -91, -95, -99, -103, -107, -111, -115, -119, -123,
        -127, -131, -135, -138, -142, -146, -149, -153, -156, -160,
        -163, -167, -170, -173, -177, -180, -183, -186, -189, -192,
        -195, -198, -200, -203, -206, -208, -211, -213, -216, -218,
        -220, -223, -225, -227, -229, -231, -232, -234, -236, -238,
        -239, -241, -242, -243, -245, -246, -247, -248, -249, -250,
        -251, -251, -252, -253, -253, -254, -254, -254, -254, -254,
        -255, -254, -254, -254, -254, -254, -253, -253, -252, -251,
        -251, -250, -249, -248, -247, -246, -245, -243, -242, -241,
        -239, -238, -236, -234, -232, -231, -229, -227, -225, -223,
        -220, -218, -216, -213, -211, -208, -206, -203, -200, -198,
        -195, -192, -189, -186, -183, -180, -177, -173, -170, -167,
        -163, -160, -156, -153, -149, -146, -142, -138, -135, -131,
        -127, -123, -119, -115, -111, -107, -103, -99, -95, -91,
        -87, -83, -78, -74, -70, -65, -61, -57, -53, -48,
        -44, -39, -35, -31, -26, -22, -17, -13, -8, -4
    };
    /** 透明 **/
    public static int TRANSPARENT = 0;
    /** 不透明 **/
    public static int OPAQUE = 15;
    /**
    * 像素值
    * 包含动画帧，主下标标识动画帧数，副下标的值代表像素值
    */
    public short pixels[][];
      /*
      * 精灵的宽度
      * 该版本默认精灵各个帧的宽度一样大小
      */
    public short width;
    /*
     * 精灵的高度
     * 该版本默认精灵各个帧的高度一样大小
     */
    public short height;
    /*
     * 动画帧数
     */
    public byte numOfFrame;
    /*
     * 当前动画帧数
     */
    public int curFrame;
    /*
     * 构造函数
     * 确保传入的各个值为合理的值
     * 使用的话请自己做判断
     * @param _pixels 动画的像素值
     * @param _width 宽度
     * @param _height 高度
     */
    public Sprite(short[][] _pixels, short _width, short _height){
      pixels = _pixels;
      width = _width;
      height = _height;
      numOfFrame = (byte)_pixels.length;
      curFrame = 0;
    }
    /*
     * 构造函数
     */
    public Sprite(){
     }
    /*
     * 投影
     * @param cData
     * @param l
     * @param i1
     * @param j1
     * @param k1
     * @return
     */
    private final short project(short cData[], int l, int i1, int j1, int k1) {
      int j3 = (j1 & 0xffff) >> 8;
      int k3 = (k1 & 0xffff) >> 8;
      int l3 = (256 - j3) * (256 - k3);
      int i4 = j3 * (256 - k3);
      int j4 = (256 - j3) * k3;
      int k4 = j3 * k3;
      int l2 = j1 >> 16;
      int i3 = k1 >> 16;
      l2 %= l;
      i3 %= i1;
      i3 *= l;
      short word0 = cData[l2 + i3];
      short word2 = cData[(l2 + (i3 + l)) % (cData.length - 1)];
      l2 = ++l2 % l;
      short word1 = cData[l2 + i3];
      short word3 = cData[(l2 + (i3 + l)) % (cData.length - 1)];
      int l1 = word0 >> 12 & 0xf;
      int i2 = word1 >> 12 & 0xf;
      int j2 = word2 >> 12 & 0xf;
      int k2 = word3 >> 12 & 0xf;
      int k5 = l1 * l3 + i2 * i4 + j2 * j4 + k2 * k4 >> 16;
      l1 = word0 >> 8 & 0xf;
      i2 = word1 >> 8 & 0xf;
      j2 = word2 >> 8 & 0xf;
      k2 = word3 >> 8 & 0xf;
      int l4 = l1 * l3 + i2 * i4 + j2 * j4 + k2 * k4 >> 16;
      l1 = word0 >> 4 & 0xf;
      i2 = word1 >> 4 & 0xf;
      j2 = word2 >> 4 & 0xf;
      k2 = word3 >> 4 & 0xf;
      int i5 = l1 * l3 + i2 * i4 + j2 * j4 + k2 * k4 >> 16;
      l1 = word0 & 0xf;
      i2 = word1 & 0xf;
      j2 = word2 & 0xf;
      k2 = word3 & 0xf;
      int j5 = l1 * l3 + i2 * i4 + j2 * j4 + k2 * k4 >> 16;
      return (short) ((k5 << 12) + (l4 << 8) + (i5 << 4) + j5);
    }

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【责编:landy】

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