AS3倒影算法

最新推荐文章于 2025-08-23 18:37:13 发布

原创最新推荐文章于 2025-08-23 18:37:13 发布 · 575 阅读

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#算法 #matrix

function createRef(picSource:DisplayObject): void
{
     // 倒置
    var bd:BitmapData = new BitmapData(picSource.width, picSource.height, true , 0x12346f );
    var mtx:Matrix = new Matrix();
    mtx.d = - 1 ;
    mtx.ty = bd.height;
    bd.draw(picSource, mtx);
     // 添加渐变遮罩
    var width: int = bd.width;
    var height: int = bd.height;
    mtx = new Matrix();
    mtx.createGradientBox(width, height, 0.5 * Math.PI);
    var shape:Shape = new Shape();
    shape.graphics.beginGradientFill(GradientType.LINEAR, [ 0 , 0 ], [ 0.9 , 0.2 ], [ 0 , 0xFF ], mtx);
    shape.graphics.drawRect( 0 , 0 , width, height);
    shape.graphics.endFill();
    var mask_bd:BitmapData = new BitmapData(width, height, true , 0 );
    mask_bd.draw(shape);
     // 生成最终效果
    bd.copyPixels(bd, bd.rect, new Point( 0 , 0 ), mask_bd, new Point( 0 , 0 ), false );
     // 将倒影放置于图片下方
    var ref:Bitmap = new Bitmap();
    ref.y = picSource.height + picSource.y;
    ref.x = picSource.x;
    ref.bitmapData = bd;
    picSource.parent.addChild(ref);
}