Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 580

AFTER EFFECTS CS3 574
User Guide
Loops a segment of time that is measured from the last keyframe on the layer back toward the layer's In point. The
loop plays until the layer's Out point. The segment to loop is determined 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, loops the segment bounded by the last keyframe and
loopOut("cycle", 1)
second-to-last keyframe. The default value of 0 means that all keyframes will loop. See the entry for for more
loopIn
information.
Return type: Number or Array.
loopInDuration(type="cycle", duration=0)
Loops a segment of time that is measured from the first keyframe on the layer forward toward the layer's Out point.
The loop plays from the layer's In point. The segment to loop is determined by the 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, loops the first second of the entire animation. The default
loopInDuration("cycle", 1)
of 0 means that the segment to loop begins at the layer Out point. See the entry for for more information.
loopIn
Return type: Number or Array.
loopOutDuration(type="cycle", duration=0)
Loops a segment of time that is measured from the last keyframe on the layer back toward the layer's In point. The
loop plays until the layer's Out point. The segment to loop is determined by the specified duration. The duration
value sets the number of composition seconds in a segment to loop; the specified range is measured backward from
the last keyframe. For example, loops the last second of the entire animation. The
loopOutDuration("cycle", 1)
default of 0 means that the segment to loop begins at the layer In point. See the entry for for more infor-
loopIn
mation.
Return type: Key or MarkerKey.
key(index)
Argument type: index is a Number.
Returns the Key or MarkerKey object by number. For example, returns the first keyframe.
key(1)
Return type: MarkerKey.
key(markerName)
Argument type: markerName is a String.
Returns the MarkerKey object with this name. Use only on marker properties.
Return type: Key or MarkerKey.
nearestKey(t)
Returns the Key or MarkerKey object nearest to a designated time.
Return type: Number.
numKeys
Returns the number of keyframes on a property. Returns the number of markers on a marker property.
Return type: Group.
propertyGroup(countUp = 1)
Returns a group of properties relative to the property on which the expression is written. For example, if you add the
expression to a Brush stroke's Rotation property, the expression targets the Transform property
propertyGroup(1)
group, which contains the Rotation property. If you add instead, the expression targets the
propertyGroup(2)
Brush property group. This lets you establish name-independent relationships in the property hierarchy. This is
especially useful when duplicating properties that contain expressions.
Return type: Number.
propertyIndex
Returns the index of a property relative to other properties in its property group, including property groups within
masks, effects, text animators, selectors, shapes, trackers, and track points.