This year we’ve been taking the Bonus Chapter on Expressions from our book Creating Motion Graphics with After Effects and serializing as a set of 12 articles. Now that all 12 parts have been posted, we though it would be useful to provide a central index to the whole series:
Other Useful Math Expressions – including rounding, absolute value, clamping, modulus, and sine and cosine (for moving in circles), plus a sidebar on converting between radians and degrees.
Interpolation Methods – a useful method for matching different ranges of values.
Deeper into Arrays – including a review of arrays and dimensions, more advanced vector and array math, plus the length and lookAt expressions.
Space Conversions – how to translate position values between layer, comp, and world spaces, which are especially useful for mixing parenting and expressions.
Comp, Footage, and Layer Attributes – techniques for automatically finding the size and frame rate of comps and layers, plus time conversions.
Managing Time – setting up delayed animations using valueAtTime, using indexing to change a layer’s values based on its index in the Timeline, finding the rate at which a value changes, and triggering animations based on markers.
Making Decisions – our most complex subject, including if/then/else statements for animation decisions and error checking, do/while loops to create “simulation” animations, and sidebars on equivalence tests, accumulating values inside loops, and formatting expressions.
Going for a Loop – causing animations or footage to loop by repeating already-placed keyframes or segments of time.
Wiggly World – exploring the wonderful wiggle expression method in detail, including how to control the amount of wiggle.
Random Numbers – creating random values, including the differences between random, gaussRandom, and noise, changing seed values, and freezing animations.
Dreaming in Color – including tricky RGB-to-HSL conversions, and some ideas for controlling master colors across entire projects.
The content contained in Creating Motion Graphics with After Effects – as well as the CMG Blogs and CMG Keyframes posts on ProVideoCoalition – are copyright Crish Design, except where otherwise attributed.