snapshot

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        This node is used to evaluate an input geometry or matrix at
  a range of times defined by the "startTime", "endTime" and "increment"
  attribute values. When a geometry is attached as the input, the
  output is a sequence of time-evaluated geometries, which is
  referred to in maya as an "animated snapshot". When a
  matrix is attached as the input, the output is a an array of points
  that indicate the motion trail of the input matrix data.

dagPose, reverseCurve, offsetSurface, stitchAsNurbsShell, avgCurves

animCurveChanged, endTime, frames, increment, inputGeom, inputMatrix, localPosition, localPositionX, localPositionY, localPositionZ, outputGeom, points, startTime, update

Long name (short name)	Type	Default	Flags
startTime (s)	time	0film
The first time at which to evaluate the input geometry
endTime (e)	time	0film
The last time at which to evaluate the input geometry
increment (b)	time	1film
How much time exists between copies of the geometry
inputGeom (in)	geometry	NULL
The input geometry
outputGeom (out)	geometry	NULL
The output geometry
inputMatrix (im)	matrix	identity
The input matrix.
localPosition (lp)	double3	0.0, 0.0, 0.0
Offset position for the shape in local space coordinates.
localPositionX (lpx) distance (double) 0.0cm Local location in X.
localPositionY (lpy) distance (double) 0.0cm Local location in Y.
localPositionZ (lpz) distance (double) 0.0cm Local location in Z.
points (pts)	pointArray	empty
Outputs an array of points that correspond to the locations of the translate pivot of the snapshotted object.
frames (f)	intArray	empty
Stores the list of frame numbers corresponding to the points. The frame unit is ticks.
animCurveChanged (acc)	Message	n/a
This attribute is used internally to store whether dirty messages received by the inputGeom attribute arrive from transformations versus modifications to animCurves that affect the snapshot calculation. This allows the most common case of snapshot usage (that of snapshotting an animated object) to work more efficiently.
update (up)	enum	1
Controls whether the snapshot updates on demand, or updates whenever the inputGeom attribute is marked dirty, or only update when an input animCurve is modified, versus every time the input shape attribute is modified.