波紋のトランジション

こちらのエントリーをみて，以前書いたこれのサンプルが，どれくらい簡単に変更できるか興味がわいたのでやってみた．

まぁ，想像の範囲内，一応以下のように'createTransitionFilter'メソッドだけ変更すればできた．

Transition.m

- (void)createTransitionFilter {
    [_transitionFilter release];
    _transitionFilter = nil;

    _transitionFilter = [[CIFilter filterWithName:@"CIRippleTransition"] retain];
    [_transitionFilter setDefaults];
    [_transitionFilter setValue:_initialImage 
        forKey:@"inputImage"];
    [_transitionFilter setValue:_finalImage 
        forKey:@"inputTargetImage"];
    [_transitionFilter setValue:_inputShadingImage 
        forKey:@"inputShadingImage"];
    NSRect rect = [_delegate bounds];
    [_transitionFilter setValue:[CIVector vectorWithX:rect.origin.x 
            Y:rect.origin.y 
            Z:rect.size.width 
            W:rect.size.height] 
        forKey:@"inputExtent"];
    [_transitionFilter setValue:[CIVector vectorWithX:NSMidX(rect)
            Y:NSMidY(rect)
            Z:0 
            W:0] 
        forKey:@"inputCenter"];
    [_transitionFilter setValue:[NSNumber numberWithInt:30] 
        forKey:@"inputWidth"];
    [_transitionFilter setValue:[NSNumber numberWithInt:50] 
        forKey:@"inputScale"];
}

変更前：

変更後：

参考：
トランジションフィルタ (Transition Filters)
http://developer.apple.com/jp/documentation/GraphicsImaging/Conceptual/CoreImaging/ci_filters/chapter_5_section_14.html

間違いがあればご指摘いただければ幸いです．