In the displacementMapFilter v1post the black and white color gradient behind the image was a movieClip with an gradient color. If we want to create a dynamic gradient map that generates pseudo-random results you use Perlin Noise.
In this example I am using a Perlin Noise to generate a movieClip where the b&w gradient shifts continually through the manipulation of the random seed number. If you keep all other parameters the same, you can generate different pseudo-random results by varying the random seed value. I am also controling the number of octaves : the individual noise functions to combine to create this noise. Try it, see how details gets better as octave increases but your CPU also starts to lag. I am also introducing the offset; an array of points that correspond to x and y offsets for each octave. Each point in the offset array affects a specific octave noise function. More points more movement.
var seed = random(100);
var ocatves = sliderO/10;
var p = new Point(w, h);
var offsetArray = new Array(p, p, p, p, p);
posted by Paul Ortchanian in bitmapData (56) | Comments (2) |
Paul said...
Instead of updating the seed try animating your offsets. I think you'll be happy with the results. First, add a point for each octave.
for(var i: Number = 0; i < octaves; i++)
{
var point: Point = new Point(0, 0);
offsets.push(point);
}
And then update the point values at each interval.
for(var i: Number = 0; i < octaves; i++)
{
var point: Point = offsets[i] as Point;
point.y += (i * 1.25);
}
Be sure to set your seed to a fixed value.
var seed: Number = 1 // will do
That should give a nice effect.
Annette said...
I know it takes a lot of work - honestly I dont see this one - sorry