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Jitter

Quick Reference to Scripting Command
a=JITTER(seed,DIRECTION[0-2], probablility, spoke interval, max spokes, interstitial width, R, G, B, A)
Items in CAPS are 0/1 switches or switches with more options than 0/1.


Operation Example

This operation is made for animation. It adds the effect of a film projection slipping off of its track. This is a random operation, you can choose the probability that the film will slip, as well as the maximum number of spokes that it can slip. Many other controls are available to you (below).


Jitter Operation Dialog

Jitter Controls

Seed

This is the seed for the random number generator. Using the same seed will provide repeatable results.

Note:

Keep this in mind...
When adding a film jitter to an animation, trending the seed is advised. If the same seed is used in every frame of the animation, the same result will be produced every time. Trending the seed will give random effects.

It's not necessary to make the trendline for seed erratic or somehow random, a simple sloping line will produce a unique set of random numbers every step of the way. more on trends.

Probability

This is the probability that the film will slip. You can think of the value entered as "The film will slip every THIS MANY frames, on average." A value of 1 will insure that the frame will jitter every time. A value of 100 would mean the film only jitters every 100 frames, on average.

Spoke Interval

This is the distance (in pixels) between the "spokes" that are "moving the film." It basically acts as a way to produce the impression that the film is being jittered by a set distance.

Max Spokes

This is the maximum number of spokes that can miss when the film jitters. This number is also random but will be limited by the value you enter.

Interstitial Region

This controls the width of the region between cells (the interstitial regions).

Direction

This controls what direction the film will slip when it jitters, up or down. This also gives you the choice not to control the direction but rather to let it be determined by a random number.

Bar Color

This allows you to control the color of the interstitial region. You can control Red, Green, Blue, Alpha (all 0-255).


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