Random Fractals» noise http://randomfractals.com/blog Sat, 27 Mar 2010 13:57:26 +0000 http://wordpress.org/?v=abc en hourly 1 Interactive BitmapData Perlin Noise Explorer http://randomfractals.com/blog/2008/10/16/interactive-bitmapdata-perlin-noise-explorer/ http://randomfractals.com/blog/2008/10/16/interactive-bitmapdata-perlin-noise-explorer/#comments Thu, 16 Oct 2008 20:49:17 +0000 Taras http://tarasnovak.com/blog/?p=124 If you’d like to create your own Perlin Noise music vis or try to produce programmatic natural-looking textures, here is an interactive BitmapData Perlin Noise Explorer for you to play with:

I’ll post some sample configurations for the clouds, sea, smoke, wood grain and brushed steal textures later.

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]]> http://randomfractals.com/blog/2008/10/16/interactive-bitmapdata-perlin-noise-explorer/feed/ 1 Perlin Noise Music Vis http://randomfractals.com/blog/2008/10/16/perlin-noise-music-vis/ http://randomfractals.com/blog/2008/10/16/perlin-noise-music-vis/#comments Thu, 16 Oct 2008 00:40:46 +0000 Taras http://tarasnovak.com/blog/?p=86 Here is a fun Perlin noise music vis with The X-Ecutioners “cuttin’ it up, scratchin’ it… They sounded so good they made everybody dance. (Check it out.)” — Like This:

(Click on the visualization to change color channels)

Doesn’t it look like a crowd dancing in the club? Well, close enough. Here is the real deal:

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]]> http://randomfractals.com/blog/2008/10/16/perlin-noise-music-vis/feed/ 1 Noise Test http://randomfractals.com/blog/2008/10/10/noise-test/ http://randomfractals.com/blog/2008/10/10/noise-test/#comments Fri, 10 Oct 2008 22:41:27 +0000 Taras http://tarasnovak.com/blog/?p=40 While attempting to build a sample video wall for my Flash video test drive, for loading all the video previews in a 9×9 grid I wanted to simulate that good old “no signal” image and noise you get from a tube.

Here is a sample:

Click on the image and mouse over the noise animation to hear that “no signal” sound effect. You can also View Source and download the tiny bit of code that generates this effect.

As I am sure you already know it’s generated with BitmapData.noise() function.

A while back I came across Keith Peters’s NoiseExplorer that was really handy to pick the color channel settings and other parameters of the bitmapData.noise() function to get that no signal image. The only part that nagged me was to click on the Render button every time I changed noise function parameters.

This sparked my interest in bitmapdata api and prompted me to explore Flex HSlider UI control capabilities, timers and sound effects. Before I knew it, I got too carried away and created an Interactive BitmapData Noise Explorer of my own to test those Flex features and find some use for Doug’s ResizableWrapper container at the time.

Here is my Interactive BitmapData Noise Explorer:

It provides informative tooltips for all the toggles. So, click on the image to pay with it. You can also view or download the source code.

What can you do with this?

I don’t think there are many practical applications of bitmapdata.noise() function. Video preloads and maybe some image transitions with alpha channel turned on is probably all you’d use this function for.

BitmapData.perlinNoise() on another hand is a powerful tool to generate natural textures and environments and will be the topic of my next blog post.

P.S.: unfortunately, I don’t recall where I got that nosingnal.mp3 anymore.

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