wiggle expression with stepped (not smooth) interpolation?

[lmaclanphere]

hi

not sure if it's even a wiggle expression I'm after,

but I'm wondering how to go about getting a series of random values that an object or parameter will jump to (rather than smoothly transition to, as in the basic wiggle expression).

thanks

ML

[lmaclanphere]

just messing with it a bit...it looks like one option is to pre-comp a wiggled layer, then use the posterize time effect on the precomp....

any other methods out there?

ML

[Rick Gerard]

That is probably the easiest.

[lmaclanphere]

thanks Rick

ML

[jdgstewart]

you could actually just add a posterizeTime expression before your wiggle — like so:

posterizeTime(12); // number in parentheses is the frame rate you want to wiggle at — lower number = more "stepped //

wiggle(5, 50)

[Liran Tabib]

Hi

You can use the extended wiggle parameters like this to create the required jumps:

wiggle(2,200, 1, .5, time-time%.5)

just change the numeric value of the "time-time%.5" parameter

for example:

wiggle(2,200, 1, .5, time-time%.5) jump every 0.5 seconds

wiggle(2,200, 1, .5, time-time%1) jump every 1 second

wiggle(2,200, 1, .5, time-time%2) jump every 2 seconds

wiggle(2,200, 1, .5, time-time%.3) jump every 0.3 seconds

the first and the second parameters (2,200) determine the frequency and amplitude as usual.

I hope this will shorten up things for you

Liran Tabib

www.vdodna.com

[Mathias Moehl]

iExpressions also contains a "snapping Wiggle" which is like first applying a normal wiggle and then snapping it to a grid such that if effectively jumps from one grid line to the next one.

As any iExpression, it comes with an intuitive user interface:

iExpressions is a commercial extension for After Effects that I develop and that is available here:

iExpressions 2 - aescripts + aeplugins - aescripts.com

[ericsten]

Check out this awesome page by MotionScript

Random Motion

Here's a quick breakdown of what's likely useful to you.

pause=1;                                                                 // How long to hold in each position

seed = Math.floor(time/pause);                               // Generates seed random values

seedRandom(seed,true);                                         // Gives random seed over time

random([thisComp.width, thisComp.height])          // Gives random X, Y values based on Comp width & height