OutTrans = easeIn(time, outPoint, outPoint - trans,, ) InTrans = easeOut(time, inPoint, inPoint + trans,, ) SnapScale = 300 //percent of scale to zoom It creates a “snap” zoom on the in and out of the layer by modifying scale. This is a cool expression to use on text. Linear(time, inPoint, marker.key(1).time, 0, 100) - linear(time, marker.key(2).time, outPoint, 0, 100) Linear(time, inPoint, inPoint + tSecs, 0, 100) - linear(time, outPoint - tSecs, outPoint, 0, 100) TSecs = transition / ( 1 / ameDuration) // convert to seconds Autofade: Add to opacity transition = 20 // transition time in frames
If there are no markers, the transition variable is used (where is says “transition=20″, this is in frames.) If there are *2* markers, the first marker is used for end point of the fade in, and the second marker is used to define the start of the fade out. This is a slightly enhanced version that I’d revamped since I posted it in the “Auto Slideshow” presets and added the option to use markers. But, I like a simpler version that I use on Opacity. You’ll also find something similar in the After Effects preset “Behaviors” called Fade In + Out, which uses the Solid Composite effect and a custom interface. This is nothing brilliant, but it is something I wrote and use all the time. Value + v*amp*Math.sin(freq*t*2*Math.PI)/Math.exp(decay*t) V = velocityAtTime(key(n).time - ameDuration/10) The “decay” is like a friction or mass setting, a higher value means a shorter decay over time. The variable “freq” is the frequency, or how frequently the bounce occurs.
Modify “amp” for the amplitude or how much bounce is present. Nonetheless, it’s a great helper and I use it all the time. Although I’ve made a slight modification to it to make it a little more user friendly, it’s nothing that I will lay claim to as my own code.
The seeds were certainly planted by the great Dan Ebberts, and then a modified version was posted on. It’s very cool! This expression is a bit of a community effort. This also accounts for scalar or array values, so you’ll find that this expression works just as well on 2D rotation as it does on 3D position. Being that true “velocity” includes the vector (or traveling direction in 3D space), the bounce happens in whatever direction the object is traveling. Intertial Bounce v1.2Įssentially, Inertial Bounce creates a bouncing motion of any parameter from one keyframe to the next, based on its velocity. These are expressions I use in just about every project, and I consider them to be incredible workflow enhancements.ĭownload the AE Presets 1. Therefore, I’d like to share with you my 5 favorite expressions. I realize that expressions can be daunting, and some would rather copy and past useful code rather than learn the language.
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