A variable is a placeholder for information. We use variables every day, but we might not recognize them as such. An array, on the other hand is a type of object that holds an ordered set of numbers. In this movie, author Luisa Winters demonstrates how to use variables and arrays in Adobe After Effects.
- A variable is a placeholder for information.…We use variables everyday,…but we might not recognize them as such.…For example, when we see the time on our phones,…the place that is showing the time is a variable.…It is a variable that looks for the information…that is going to display, and then it displays it.…Because the information is constantly changing,…the container that holds it is called a variable.…An array on the other hand is a type of object…that holds an ordered set of numbers.…
Position in AfterEffects is usually represented…by an array of two numbers:…the first one for the x value…and the second one for the y value.…Let's see how they work in AfterEffects expressions.…Open composition 3.1, variables and arrays.…In here you're going to see two layers:…a green ball and a red ball.…Let's go ahead and add a wiggle expression…to the position of the red ball.…
And you can see that it indeed is wiggling position.…Now what we want to do is…we want to wiggle only the up and down.…In other words, we don't want for the red ball…
- Adding expressions
- Editing expressions manually
- Changing expression dimensions: rate, value, music amplitude, etc.
- Working with expression variables
- Using the Expression Language menu
- Using random values
Skill Level Intermediate
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1. What Are Expressions?
2. Expression Dimensions
4. Expression Language Menu
5. Other Expressions
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