Check out Paul's SSA Karaoke Animator script in this forum:
viewtopic.php?f=9&t=380
Maybe it could help you.

You could also try the "lookAt" function, for calculating the x,y,z angles between 2 points in 3d space and the "length" function, for calculating the distance between 2 points. for example: C = thisComp.layer("Camera 1"); ANGL = lookAt(position, C.position); DIST = len...

Tha't actualy changes the frequency of the COS wave.
Let me know if it works better for you...

Atomic, If the COS works for you, you could try adding another one or two COS to the expression, that would give a more interesting and "random" like movement. You could try something like this: r = (math.cos(localTime*passedFrequency) * amplitude) + (math.cos(localTime*passedFrequency*2.8...

The expression you wrote would not create the smooth but random wiggle motion. What you wrote would look more like of a looping motion with sudden small jumps. I don't know Blender, but from the brief explanation of the Blender functions you've sent, I think those 2 might do something similar to wha...

Works great now !
Love it !
Thank you for sharing !

Koby

I get an error message:
"Unable to execute script at line 19. Expected : ]"

From my experience with random functions, Perlin Noise is the mathematical model of the wiggle expression. The Perlin noise adds few noise levels (random sequences) at doublly increasing frequency on each level. Lower frequency noise is generated by larger interpolation. Adding those with decreasing...

Atomic,
I don't know exactly what they are doing, but from the behaviour I think it should be similar to a Fractal Noise, known also as Perlin Noise.
Check out this website for a good explanation and mathematics of the Perlin Noise:
http://freespace.virgin.net/hugo.elias/ ... perlin.htm

Koby.

I've just checked it, and it looks awsome !
Great work !
I Loved the progress bar too...

What should be the difference at the FAST mode ?

Koby.

Add a Null, make it 3D, and position it where you want the center to be (call it "Null 1"). Then apply this expression for the Position of the layers: (this will place them randomly around the Null, at maximum distance of +/- 200 pixels in [X,Y,Z] from it) seedRandom(index,true); thisComp....

If I understood correctly, I think he needs something different.
Try using: 10000/scale
where the scale is taken from the tracker, and applied to the tracked layer.
This will make smaller scale to grow (for example half size scale of 50%, would become doubly big: 200%).

Koby.

Try applying the following expression to the opacity. D_opaq = 100; D_trans = 300; d = length(position, thisComp.layer("Avoid Me").transform.position); ease(d, D_opaq, D_trans, 100, 0) It will keep the layer transparent as long as the Null ("Avoid Me") is farther from the layer b...

It would be very helpful if you could add the following subjects to the guide: (Excuse me if I mention something that is already there. I've searched and couldn't find those sublects there) 1. File Handling functions and needed procedures (open file, read file, write to file, etc.), for Text files. ...

Thank you for posting this here, and for hearing our requests! To start out with, I think it is important to add a detailed Table of Contents to the guide. This will make it much easier to find specific subjects in the guide, and will help new users understand the structure of the guide. Thanks, Koby.