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動く雲をシミュレートするための Flash 用のコードがいくつかあります。AS1 で動作していましたが、FLA ファイルを AS3 に更新し、Flash の最小バージョンを 10 に更新しました。このコードの何が問題になっていますか? この関数の何が問題なのかを教えていただけますか?

function createLiquidFlow(target)
{
    target.counter = 1;
    target.pt = new flash.geom.Point(0, 0);
    target.mpoint = new flash.geom.Point(0, 0);
    // target.myBitmap = new flash.display.BitmapData(target._width, target._height, false, 0);
    target.myBitmap = new flash.display.BitmapData(target.width, target.height, false, 0 );
    target.myDispl = new flash.filters.DisplacementMapFilter(target.myBitmap, target.mpoint, 10, 2, 10, 15, "clamp");
    target.myList = new Array();
    target.myList.push(target.myDispl);
    target.filters = target.myList;
    target.addEventListener(Event.ENTER_FRAME,
                          function ()
                            {
                                trace("target.name = "+target.name);
                                trace("target.myBitmap = "+target.myBitmap);
                                trace("target.myBitmap.width = "+target.myBitmap.width);
                                trace("target.myBitmap.height = "+target.myBitmap.height);
                                trace("target.counter = "+target.counter);
                                var filterList = target.filters;
                                var offset = new Array();
                                offset[1] = new Object();
                                offset[1].x = target.counter;
                                offset[1].y = target.counter / 2;
                                target.myBitmap.perlinNoise(45, 6, 3, 50, true, false, 7, true, offset);
                                filterList.mapBitmap = target.myBitmap;
                                target.filters = filterList;
                                ++target.counter;
                            });
}

createLiquidFlow( movieClipLiquid )

イベント リスナーをトレースできますが、ビットマップと Perlin 関数が機能していないようです。出力 SWF では視覚的に何も起こりません。ティア

target.name = liquid74_mc
target.myBitmap = [object BitmapData]
target.myBitmap.width = 950
target.myBitmap.height = 76
target.counter = 1
myFilterList = [object DisplacementMapFilter]
BEFORE myFilterList.mapBitmap = undefined
AFTER  myFilterList.mapBitmap = [object BitmapData]
BEFORE target.filters = [object DisplacementMapFilter]
AFTER  target.filters = [object DisplacementMapFilter]
target.name = liquid74_mc
target.myBitmap = [object BitmapData]
target.myBitmap.width = 950
target.myBitmap.height = 76
target.counter = 2
myFilterList = [object DisplacementMapFilter]
BEFORE myFilterList.mapBitmap = undefined
AFTER  myFilterList.mapBitmap = [object BitmapData]
BEFORE target.filters = [object DisplacementMapFilter]
AFTER  target.filters = [object DisplacementMapFilter]
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1 に答える 1

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その答えは、ActionScript 1 よりも ActionScript 3 の方が型に関してより厳密であるということです。Bitmap.perlinNoise には、Point オブジェクトの配列であるオフセットが必要です。Java では、これは次のようになります。

List<Point> points = new ArrayList<Point>()

と同じです

List<Object> points = new ArrayList<Object>()

ActionScript で、パラメーター化された型を Object から flash.geom.Point に変更しました。また、配列の最初の要素は定義されていません。アニメーションを清算するために、2 番目のオフセットを保持し、それを flash.geom.Point として再定義しました。したがって、作業コードは次のとおりです。

function createLiquidFlow(target)
    target.counter = 1;
    target.pt = new flash.geom.Point(0, 0);
    target.mpoint = new flash.geom.Point(0, 0);
    // target.myBitmap = new flash.display.BitmapData(target._width, target._height, false, 0);
    target.myBitmap = new flash.display.BitmapData(target.width, target.height, false, 0 );
    target.myDispl = new flash.filters.DisplacementMapFilter(target.myBitmap, target.mpoint, 10, 2, 10, 15, "clamp");
    target.myList = new Array();
    target.myList.push(target.myDispl);
    target.filters = target.myList;
    target.addEventListener(
        Event.ENTER_FRAME,
          function (e:Event)
            {
                var myFilterList = target.filters;
                var offset = new Array();
                offset[0] = new Point(0, 0);
                offset[1] = new Point(target.counter, target.counter / 2);
                target.myBitmap.perlinNoise(45, 6, 3, 50, true, false, 7, true, offset);
                myFilterList.mapBitmap = target.myBitmap;
                target.filters = myFilterList;
                ++target.counter;
            });
    // Arguments to PerlinNoise function
    // baseX:Number — Frequency to use in the x direction. For example, to generate a noise that is sized for a 64 x 128 image, pass 64 for the baseX value.
    // baseY:Number — Frequency to use in the y direction. For example, to generate a noise that is sized for a 64 x 128 image, pass 128 for the baseY value.
    // numOctaves:uint — Number of octaves or individual noise functions to combine to create this noise. Larger numbers of octaves create images with greater detail. Larger numbers of octaves also require more processing time.
    // randomSeed:int — The random seed number to use. If you keep all other parameters the same, you can generate different pseudo-random results by varying the random seed value. The Perlin noise function is a mapping function, not a true random-number generation function, so it creates the same results each time from the same random seed.
    // stitch:Boolean — A Boolean value. If the value is true, the method attempts to smooth the transition edges of the image to create seamless textures for tiling as a bitmap fill.
    //  fractalNoise:Boolean — A Boolean value. If the value is true, the method generates fractal noise; otherwise, it generates turbulence. An image with turbulence has visible discontinuities in the gradient that can make it better approximate sharper visual effects like flames and ocean waves.
    //  channelOptions:uint (default = 7) — A number that can be a combination of any of the four color channel values (BitmapDataChannel.RED, BitmapDataChannel.BLUE, BitmapDataChannel.GREEN, and BitmapDataChannel.ALPHA). You can use the logical OR operator (|) to combine channel values.
    //  grayScale:Boolean (default = false) — A Boolean value. If the value is true, a grayscale image is created by setting each of the red, green, and blue color channels to identical values. The alpha channel value is not affected if this value is set to true.
    //offsets:Array (default = null) — An array of points that correspond to x and y offsets for each octave. By manipulating the offset values you can smoothly scroll the layers of a perlinNoise image. Each point in the offset array affects a specific octave noise function.                             
}

createLiquidFlow( movieClipLiquid )
于 2011-12-29T12:21:47.817 に答える