How to animate keyframes, which I copied into After Effects to mirror the same movement as another series of keyframes?

Screen Shot 2015-12-12 at 3.39.03 PM.pngLayer of biker to right leg. Screen Shot 2015-12-12 at 4.14.56 PM.png Biker body layer.

You add an expression to the property that you want to order by selecting the property and then by holding down the Alt/Option key. Here are the basics: Adobe - search: the expressions. Learn more by typing key words such as expressions in the field search for help in the upper right corner of the AE.

If you want keyframes in a single layer to match the keyframes in another, then you can link the properties with a simple expression that is created by dragging the pickwhip to layer property from the slave to copy the master layer that you want to track. This example would bind the rotation of a layer to another rotation. The second expression would offset values and is an example of how you define in your animation cycle to the top of the opposite leg. You just know how many images there are in the cycle. Just go to the last image and read the number of frame. It's easier if you have the calendar set up to read in frames. Change the display time by holding down the Ctrl/Cmnd key by clicking on the time indicator.

If you want to have the slave shift layer in time, then you add an argument valueAtTime expression as in this example using the rotation property of the main layer:

r = thisComp.layer("Master").transform.rotation;

offset = r.valueAtTime (time +. 5)

This assumes that your cycle of keyframes is 1/2 second.

If you are more comfortable working with frames in seconds and then you change the expression like this assuming that the number of images in your game to keyframe is 15:

TF = 15; Number of the frame in the last keyframe in the cycle

r = thisComp.layer("Master").transform.rotation;

TTF = tf/(1/thisComp.frameDuration);

offset = r.valueAtTime (time + ttf)

Here is an example of pin simple puppet:. Dropbox - Expression leads to foot Cycle CC 12 aep (If your browser adds a .txt extension, simply remove it and you should be able to load the project 2012 CC and later). I arranged the workspace so that it was easy to see what I had done. Given that I've created a loop instead of a ping-pong of the keyframe in the middle of the cycle was used as at the beginning. Have fun...

Tags: After Effects

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