Actually it has more than one use. OK - let's get back to the problem of random durations for our random motion. You can change the interpolation from ease() to linear() for a different effect. The main difference is the setup and execution of the "while" loop. This is a simulation of the Brownian motion of a big particle (dust particle) that collides with a large set of smaller particles (molecules of a gas) which move with different velocities in different random directions. It turns out that for any given random seed, the random values generated will be unique to each layer. Here's an example expression for Position that will move a layer to a random position and hold it at that location: Remember that without the seedRandom() call, the layer would bounce around to a different Position on each frame. The code would seem to be simple enough. The sequence would be to calculate the seed for this half second, use that to get the random Position for this half second (which will be our starting Position), bump the seed by one and use that to see what the random starting Position for the next half second will be (which we'll use as the ending Position for the current half-second segment). You'll see. In the next section we'll extend these concepts to randomizing other properties. Here's the good news: that's what allows you to move the time marker to any frame in the comp and After Effects can immediately begin to show you that frame because it doesn't have to know what any expressions applied have done in the past. You must credit the author. How would we do that? So, for our purposes here, it will not be necessary to revisit each frame every time the expressions runs - we only need to look at the start of each segment (which will be, on the average, about every .5 seconds or so). You would expect sporadic movement but you might also expect the layer's Rotation to always be increasing in the clockwise direction. Most of the time this is a very handy feature, but there are some occasions where it would be nice to be able to force two different layers to generate the same random numbers. By setting the second parameter of seedRandom() to "true", the numbers generated by random() will be the same on every frame. So what if we were to "peek ahead" by changing the seed to the value that we'll be using in the next half second to see what the next Position will be, and start heading there? Animated 3D Digital Smart City Walking Motion Graphic, Mystical horror background with dark hall of room 2, Animated 3D Digital Smart City Walking 360 Motion Graphic, Cinematic background with cloudy and sun with motion camera, Cinematic background with cloudy in galaxy and motion camera, Cyberpunk animation background with computer chip with lines and grid, Cyberpunk animation background with computer chip and neon lights, Animated closeup fireplace and gifts in the Christmas socks 1, Text News Breaking and news intro graphic with lines, Animated 3D Data Stardust Binary Code Green Motion Graphic, Cloud and sky animated background flying straight up, Stars and Dust Abstract Motion Background, Mystical halloween background with dark forest and fog, Business Data Concept Graphs With Alpha 02, Access 120,000+ Premium Stock Videos and Audio Files, Mystical horror background with dark skull Holiday halloween, Animated 3D Digital City Blue Motion Graphic, Animated Loop 3D Digital City Fly Over Purple, Stock Market Chart Animated Loop Red Green 01, Mystical horror background with hands behind the glass, Motion green circles abstract background 1, Mystical halloween background with dark clouds and grave on cemetery 1, Tracking MACD Chart and Trading Candlesticks, Creative Commons 3.0 Unported (CC BY 3.0).

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