Flash水波特效（BitmapData）
这是一个水波互动效果的动画，文件打开后在画面上单击鼠标，或按住鼠标左键不放在画面上划过就会出现圈圈涟漪和波纹，非常美丽，跟真的水面一样，非常漂亮。以下是制作方法：
一、新建FLA。（flash player 8，as2.0）
二、导入图片到库。不用放到舞台。
三、打开库设置图片链接。标识符为：surface。将“为运行时导入”勾去掉，勾上“为actionscript 导出”和“在第一帧导出”
四、在第一帧插入动作代码。
var ww = Stage.width;var hh = Stage.height;
var damper = new flash.display.BitmapData(ww/2, hh/2, false, 128);
var result = new flash.display.BitmapData(ww/2, hh/2, false, 128);
var result2 = new flash.display.BitmapData(ww, hh, false, 128);
var source = new flash.display.BitmapData(ww/2, hh/2, false, 128);
var buffer = new flash.display.BitmapData(ww/2, hh/2, false, 128);
var output = new flash.display.BitmapData(ww, hh, true, 128);
var surface = flash.display.BitmapData.loadBitmap("surface");
var bounds = new flash.geom.Rectangle(0, 0, ww/2, hh/2);
var origin = new flash.geom.Point();
var matrix = new flash.geom.Matrix();
var matrix2 = new flash.geom.Matrix();
matrix2.a = matrix2.d=2;
var wave = new flash.filters.ConvolutionFilter(3, 3, [1, 1, 1, 1, 1, 1, 1, 1, 1], 9, 0);
var damp = new flash.geom.ColorTransform(0, 0, 9.960937E-001, 1, 0, 0, 2, 0);
var water = new flash.filters.DisplacementMapFilter(result2, origin, 4, 4, 48, 48, "ignore");
attachBitmap(output,0);
var ms = getTimer();
var frame = 0;
var mouseDown = false;
onMouseDown = function () {
mouseDown = true;
};
onMouseUp = function () {
onEnterFrame();
mouseDown = false;
};
onEnterFrame = function () {
if (mouseDown) {
var _loc2 = _xmouse/2;
var _loc1 = _ymouse/2;
source.setPixel(_loc2+1,_loc1,16777215);
source.setPixel(_loc2-1,_loc1,16777215);
source.setPixel(_loc2,_loc1+1,16777215);
source.setPixel(_loc2,_loc1-1,16777215);
source.setPixel(_loc2,_loc1,16777215);
}
// end if
result.applyFilter(source,bounds,origin,wave);
result.draw(result,matrix,null,"add");
result.draw(buffer,matrix,null,"difference");
result.draw(result,matrix,damp);
result2.draw(result,matrix2,null,null,null,true);
output.applyFilter(surface,new flash.geom.Rectangle(0, 0, ww, hh),origin,water);
buffer = source;
source = result.clone();
};
