FLASH 8 书法浸渍效果

Flash 8: Blotting Paper Effect

Here is an astonishingly simple method to get something like a diffusion effect of wet ink on blotting paper. This can be used to get organic looking edges or to give photos a painterly effect:
1. draw the object you want to diffuse onto a BitmapData object [A]
2. create another BitmapData object [B] of the same size as a temporary storage
3. create another BitmapData object [C] of the same size and fill it with noise
4. apply the DisplacementMapFilter on A using C as the displacement map and store it in B
5. draw B over A using Multiply mode for growth or Screen mode for shrinking or both for something in between. You can also experiment with other blendmodes
6. repeat from step 4
For a less fibery look you have to create a new random noise map each round. Instead of normal noise you can also use perlin Noise which will give you some freakish effect especially when used with photos.

http://www.quasimondo.com/archives/diffusion.swf

Moving the mouse to the top will shrink the dark areas
Moving the mouse to the bottom will grow the dark areas
Moving the mouse to the left will give a smoother, blurrier look
Moving the mouse to the right will give a more fractal, fibery look

You can also paint by clicking and dragging and erase by clicking and dragging with the SPACE bar pressed.
And I have added a litte “Rorschach” inkblot mode which will horizontally mirror everything you draw. Press the “R” key to toggle it on/off. (you will have to click the Flash file at least once, so it receives the keyboard focus).