ADOBE AFTER EFFECTS 7.0
User Guide
585
Argument type: t is a Number.
Returns the spatial speed value at the specified time.
wiggle(freq, amp, octaves=1, ampMult=.5, t=time) Return type: Number or Array.
Argument type: freq, amp, octaves, ampMult, and t are Numbers.
Randomly shakes (wiggles) the value of the property. The freq value is in wiggles per second, amp is in units of the
property to which it is applied, octaves is the number of octaves of noise to add together, ampMult is the amount that
amp is multiplied by for each octave, and t is the base start time. Example:
position.wiggle(7, 30, 3)
temporalWiggle(freq, amp, octaves=1, ampMult=.5, t=time) Return type: Number or Array.
Argument type: freq, amp, octaves, ampMult, and t are Numbers.
Samples the property at a wiggled time. The freq value is in wiggles per second, amp is in units of the property to
which it is applied, octaves is the number of octaves of noise to add together, ampMult is the amount that amp is
multiplied by for each octave, and t isthebasestarttime.Forthisfunctiontobemeaningful,thepropertyitsamples
must be animated, because the function alters only the time of sampling, not the value. Example:
scale.temporal-
Wiggle(5, .2)
smooth(width=.2, samples=5, t=time) Return type: Number or Array.
Argument type: width, samples, and t are Numbers.
Applies a box filter to the value of the property at the specified time, and smooths the result over time. The width
value is the range of time (in seconds) over which the filter is averaged. The samples value is the number of discrete
samples evenly spaced over time. Generally, you’ll want samples to be an odd number so that the value at the current
time is included in the average. Example:
position.smooth(.1, 5)
loopIn(type=“cycle”, numKeyframes=0) Return type: Number or Array.
Loopsasegmentoftimethatismeasuredfromthefirstkeyframeonthelayerforwardtowardthelayer’sOutpoint.
Theloopoccursfromthelayer’sInpointtothefirstkeyframeonthelayer.Thesegmenttoloopisdelineatedbythe
specified number of keyframes. The numKeyframes value sets the number of keyframe segments to loop; the
specified range is measured from the first keyframe. For example,
loopIn(“cycle”, 1) loops the segment bounded by
the first and second keyframes. The default value of 0 means that all keyframes will loop.
loopOut(type=“cycle”, numKeyframes=0) Return type: Number or Array.
Loops a segment of time that is measured from the last keyframe on the layer back toward the layer’s In point. The
loop occurs from the last keyframe on the layer to the layer’s Out point. The segment to loop is delineated by the
specified number of keyframes. The numKeyframes value sets the number of keyframe segments to loop; the
specified range is measured backward from the last keyframe. For example,
loopOut(“cycle”, 1) loops the segment
bounded by the last keyframe and second-to-last keyframe. The default value of 0 means that all keyframes will loop.
loopInDuration(type=“cycle”, duration=0) Return type: Number or Array.
Loopsasegmentoftimethatismeasuredfromthefirstkeyframeonthelayerforwardtowardthelayer’sOutpoint.
Theloopoccursfromthelayer’sInpointtothefirstkeyframeonthelayer.Thesegmenttoloopisdelineatedbythe
specified duration. The duration value sets the number of composition seconds in a segment to loop; the specified
range is measured from the first keyframe. For example,
loopInDuration(“cycle”, 1) loops the first second of the
entire animation. The default of 0 means that the segment to loop begins at the layer Out point.
loopOutDuration(type=“cycle”, duration=0) Return type: Number or Array.
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