Android 平台水波效果源码.zip

/** * [email protected] * 本程序可以随便使用，可以随便转载，但是希望尊重我的成果，请挂上本人博客 * http://huojv.blog.hexun.com(有时间去看看，也许会有你要的东西) * 我老婆马艳，我会对你很好的！谢谢理解! * 2008-12-25 */ package com.google.android.WaterWave; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.view.View; public class DrawWaterWave extends View implements Runnable { boolean bRunning = false; int BACKWIDTH; int BACKHEIGHT; short[] buf2; short[] buf1; int[] Bitmap2; int[] Bitmap1; public DrawWaterWave(Context context) { super(context); Bitmap image = BitmapFactory.decodeResource(this.getResources(),R.drawable.bg); BACKWIDTH = image.getWidth(); BACKHEIGHT = image.getHeight(); buf2 = new short[BACKWIDTH * BACKHEIGHT]; buf1 = new short[BACKWIDTH * BACKHEIGHT]; Bitmap2 = new int[BACKWIDTH * BACKHEIGHT]; Bitmap1 = new int[BACKWIDTH * BACKHEIGHT]; image.getPixels(Bitmap1, 0, BACKWIDTH, 0, 0, BACKWIDTH, BACKHEIGHT); start(); } void DropStone(int x,//x坐标 int y,//y坐标 int stonesize,//波源半径 int stoneweight)//波源能量 { if ((x + stonesize) > BACKWIDTH || (y + stonesize) > BACKHEIGHT || (x - stonesize) < 0 || (y - stonesize) < 0) return; for (int posx = x - stonesize; posx < x + stonesize; posx++) for (int posy = y - stonesize; posy < y + stonesize; posy++) if ((posx - x) * (posx - x) + (posy - y) * (posy - y) < stonesize * stonesize) buf1[BACKWIDTH * posy + posx] = (short)-stoneweight; } protected void onDraw(Canvas canvas) { canvas.drawBitmap(Bitmap2, 0, BACKWIDTH, 0, 0, BACKWIDTH, BACKHEIGHT, false, null); } public void start() { bRunning = true; Thread t = new Thread(this); t.start(); } public void key() { DropStone(BACKWIDTH/2, BACKHEIGHT/2, 10, 50); } public void stop() { bRunning = false; } public void run() { while (bRunning) { // try // { // Thread.sleep(50); // }catch(Exception e){e.printStackTrace();}; RippleSpread(); render(); postInvalidate(); } } void RippleSpread() { for (int i=BACKWIDTH; i<BACKWIDTH*BACKHEIGHT-BACKWIDTH; i++) { //波能扩散 buf2[i] = (short)(((buf1[i-1]+ buf1[i+1]+ buf1[i-BACKWIDTH]+ buf1[i+BACKWIDTH]) >>1) - buf2[i]); //波能衰减 buf2[i] -= buf2[i]>>5; } //交换波能数据缓冲区 short []ptmp =buf1; buf1 = buf2; buf2 = ptmp; } void render() { int xoff, yoff; int k = BACKWIDTH; for (int i=1; i<BACKHEIGHT-1; i++) { for (int j=0; j<BACKWIDTH; j++) { //计算偏移量 xoff = buf1[k-1]-buf1[k+1]; yoff = buf1[k-BACKWIDTH]-buf1[k+BACKWIDTH]; //判断坐标是否在窗口范围内 if ((i+yoff )< 0 ) {k++; continue;} if ((i+yoff )> BACKHEIGHT) {k++; continue;} if ((j+xoff )< 0 ) {k++; continue;} if ((j+xoff )> BACKWIDTH ) {k++; continue;} //计算出偏移象素和原始象素的内存地址偏移量 int pos1, pos2; pos1=BACKWIDTH*(i+yoff)+ (j+xoff); pos2=BACKWIDTH*i+ j; Bitmap2[pos2++]=Bitmap1[pos1++]; k++; } } } }